i zanzibar urban water supply project | …...i i i i i i i i i i i zanzibar urban water supply...

THE REPUBIiC OF TANZANIA

Ministry of Water, Energy,Construction, Lands andEnvironment, Zanzibar

824 T2ZA92

IIIIIIIIII ZANZIBAR URBAN WATER SUPPLY PROJECT

| REPORT ON HYDROGEOLOGY

IIIIIIIIII

THE REPUBLIC OF FINLAND

Ministry for ForeignAffairsFINNIDA

APRIL 1992

Plancenter Ltd

IIIIIIIIIIIIIIIIIIIII

REPORT ON HYDROGEOLOGY

LIST OF CONTENTS

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

WORK PLAN

REVIEW OF THE HYDROGEOLOGY OF MTONI AND BUEUBU SPRINGS

2.1 Background

2.2 Water Balance

2.3 Geology and hydrogeology of the catchment areas

2.4 Environmental consideration

2.5 Recommendation

GEO-ELECTRICAL SOUNDING

DRILLING PROGRAMME

HYDROGEOLOGICAL MONITORING

PUMPING TESTS

BOREHOLE DESIGNS

TRAINING

WORK PROGRAMME FOR THE HYDROGEOLOGY TEAM, May - Dec 1992

LITERATURE

LiERA.HY, !• nV?N.YriOM.*i_ REFERENCEC : ' - N i ;•:• .•: R > - ' ,•;;;;;,' •;•.{•••,[ f y W A T E R S U P P L Y

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IIII

IIIIIII

ZANZIBAR URBAN WATER SUPPLY PROJECT

REPORT ON HYDROGEOLOGY, APRIL 1992

•| 1. WORK PLAN

| This report is based on the following Work Plan of Hydrogeology, April 1992

I1. To assess the hydrogeology of the Bububu spring and the Mtoni Spring. To

contribute to the protection of spring areas by defining the protection zones inthe field and contributing to the report which is going to be given to thePresident with regard of this issue. To work with the Hydrogeologist who ismember of the survey committee for the catchment areas. To discuss on thecommunication to the local residents who have to move away from the springcatchment areas.

2. To initiate the pumping tests in the recently completed Kijito Upele Borehole.To interpret the pumping test results.

3. To revise the hydrogeological monitoring programme, to review the designingof boreholes

4. To prepare the drilling programme for 1992

5. To assess the need of geo - electrical sounding programme for defininghydrogeological conditions. If needed to organize the programme with theUniversity of Dar es Salaam. To arrange use of the services of the Universityfor analyzing of selected drilling samples.

6. To discuss on the training and education of hydrogeology teamI7. To prepare reports of this consultancy

IIIII

2. REVIEW OF THE HYDROGEOLOGY OF MTONI AND BUBUBU SPRINGS

2.1 Background

Overall assessment of the hydrogeology of the spring areas was given in the WaterResources Report of the planning phase. The Master Plan, Environmental Assessment andthe Water Resources Repot brings out the concern on the environmental issues very stronglyas dense human settlements have begun to develop in the spring catchment areas. Duringthe first months of the First implementation Phase of the Zanzibar Urban Water SupplyProject the issues of the Geology of the spring areas has been under frequent discussions.Based on the available background information this report aims at clarifying the geologicaland hydrogeological conditions of the springs and to make a more detailed proposal ontapping larger quantities of ground water from the spring areas.

Since 1920's several studies have been prepared on the geology of the Mtoni and Bububusprings. G. M. Stockley, Director of Geological Survey, Tanganyika Territory, Gives anassessment on the possibility to increase water withdrawal from the spring areas in hisreport of 1951. The recommendations of G. M. Stockley are much similar to those of theMaster Plan of 1991. While the Water Resources Study recommends geophysical surveysand test drilling to the water saturated formation at a safe distance from the springs,Stockley recommends at first to try to utilize the Dunduki and Welezo springs, and then tolocate best possible drilling sites by geo - electrical sounding from the water saturatedformation. (Unfortunately it has not been possible to locate the report of Messrs. HowardHumphreys & Sons, Consulting Engineers to the Crown agents of late 40's or early 50'sregarding the possibilities of augmenting the town supply by increasing withdrawal of waterfrom the spring areas.)

2.2 Water Balance

The average run off from the Bububu and Mtoni springs is estimated to be 4000 m3/dayand 4400 m3/day respectively. The total average water flow at the moment from the twosprings and the small rivers is estimated to be about 20,000 m3/day. These figures are inaccordance with those of Mr. Stockley. The catchment areas of the two springs areapproximately same size, 4 km2 each. The average daily recipitation to the two catchmentareas is over 70,000 m3/day. According to the water resources study it could be possibleto develop further 3000 - 8000 m3/day from the catchment areas. This would mean aminimum increase of 1500 m3/d from each of the catchments. The study advises that thesefigures are to be verified by further tests.


2.3 Geology and hydrogeology of the catchment areas

The springs are located in the same geological horizon of Miocene limestones clays andsands. The chemical composition of water in both the springs show that considerableamount of lime is dissolved in the water from the geological horizon. Stockley calls thehorizon of Mtoni and Bububu Springs as Chlamys Werthi Beds. He mentions that oldboring records prove that there is a clay bed underlying the aquifer limestone horizon. Mr.Jonson mentions that the Miocene limestones of Mazingini Ridge may be karstic, but so farthere is no clear evidence of that. A cave formation can be observed at the Mtoni spring.At a higher elevation there is another aquifer horizon along the Welezo - Dunduki line.

2.4 Environmental consideration

An instruction for environmental protection on the catchment areas, including the Mtoni andBububu spring catchments, was drafted during this consultancy and it is in accordance withthe environmental report of 1992. It is presented in Annex 1.

2.5 Recommendation

The instructions for catchment areas should be applied hi the spring catchment areas withimmediate effect. The boundaries of the catchment areas are given in the Annex 2.

During the water resources study the Dunduki and Welezo spring areas were registered asshallow well areas, although Stockley had proposed that it will be possible to tap someartesian water from Dunduki and supply it to the existing Bububu and Mtoni pipeline. Thereis no information if these possibilities were tested hi 50 's. Stockley planned to clear theswampy spring areas and develop up to 1300 m3/day from the upper aquifer zone. Theswampy areas in Welezo are nowadays developed to rice fields. There are several verysmall spring outlets in the surroundings of the rice fields. It would be very difficult to tapwater in a hygienic way for urban supply. On the other hand the quantity of water remainsrather low. The Dunduki spring area is somewhat on similar nature as Welezo except theswamp area has no agricultural inputs. It is not recommended to develop these sources forthe urban water supply at this stage.

The simplest way to try to increase the discharge from the springs would be the loweringof the discharge water level. This could be done either by pumping with a high capacitypump from the spring eye or by opening the discharge channel at a lower altitude.Deepening of the existing discharge channel would be the safest and easiest operation to bedone. The technical solutions for this need to be carefully thought out prior to starting theconstruction works. The actual increase in the water quantity will be found out only bymonitoring the output of the springs after the modification operations.

It can be assumed that some natural aquifers have developed hi the Chlamys Werthi bedsin the spring catchment areas. The Water Resources Study recommends drilling of testboreholes hi this formation at a safe distance from the springs. The same recommendationis repeated here, if the lowering of the discharge water level will not lead to satisfactoryresults. The borehole drilling should be stopped when hitting the underlying clay formationor after penetrating an aquifer with good yield.

The drilling sites should first be located by geo - electrical sounding. The sounding shouldbe done by Slumberger Method along the lines that are presented in the Annex 3. The


distance of the drilling sites from the springs should be decided after interpreting thegeophysical survey results.

3. GEO - ELECTRICAL SOUNDING

The Sounding programme for Kijito Upele, Mwembe Chomeke and Mtoni in Unguja Islandis presented in the Annex 4. The Sounding programme for Mkoani, Chake Chake and Wetein Pemba island is presented in Annex 5. The field measurements will be subcontracted tothe University of Dar es Salaam.

The survey of the most urgent sites, Kijito Upele, Mwembe Chomeke and Mtoni was doneon 23rd - 26th April 1992. The University team completed 10 sounding points. Thecalculated results are presented in Annex 6 and 7. The sounding survey should becompleted in July 1992.

The Miocene clay is at the approximate depth of 30 m in kijito upele. The aquifer seemsto be a little better on the southern side of the existing borehole. The clay is over 50 m deepin Miembe Chomeke and high yielding boreholes can be drilled on the South Eastern sideof the existing borehole.

4. DRILLING PROGRAMME

The Work Plan of 1992 includes drilling of two boreholes. The first drilling has beencompleted by the end of April 1992 in Kijito Upele. It is thought that at least two moreproduction boreholes and three observation holes can be completed by the end of the year.The sites for these boreholes are given in the annex 8. The location of the test boreholesnos 2,3 and 4 were determined according to the sounding results. They are located in thesounding points Kijito3, Mtoni9 and Miembe6. The sites of the survey points are markedwith yellow paint in the field. The observation hole no 5 (no production drilling in thesearea) will be drilled in Fuoni area approximately to the area which is marked in the annex8. Depending on the test drilling results, production holes will be drilled about 25 m fromthe test holes.

Seventeen other potential Drilling sites in Unguja and Pemba are given in the map of Annex8. The accurate location of these boreholes will be determined after the completion of thegeo - electrical sounding Programme.

5. HYDROGEOLOGICAL MONITORING

During the Master Plan preparation, 112 and 53 local wells were identified for monitoringin the catchment areas of the planned water intakes in Unguja and Pemba respectively.Intensive monitoring has continued more than one year. The water table monitoring resultsof eighteen months are presented in the Annex 9. The maximum water table fluctuation ispresented in Annex 10. Conductivity monitoring results are shown in Annex 11. The areasof lowest fluctuation and lowest conductivity correlate. These areas are those with the


highest aquifer storativity and will be further studied by geo - electrical sounding foridentification of the ideal sites of high yielding boreholes and borehole fields.

The monitoring programme was revised and 20 local wells were selected for furthermonitoring. These wells are located both in the Quaternary and in the Miocene formations.The revised monthly monitoring programme is presented in the map of Annex 9 and 10.From these wells it should be possible to observe if any major changes will take place inthe groundwater conditions after the pumping to the urban areas will be increased.

6. PUMPING TESTS

A pumping test in the Kijito Upele failed due to generator break down. The results of airflushing and bailer tests show that the new borehole is yielding less than the old one. Itbecomes evident that the storativity of the Kijito Upele area is less than 10%. Theassumption of the Master Plan that a maximum of 230 m3/h can be drawn from this areacan be verified after the completion of the second test hole in this area.

The new production boreholes will be drilled with observation/test holes and aquifer testsof about three days bumping + recovery tests will be performed.

7. BOREHOLE DESIGNS

The high yielding boreholes should be screened with stainless steel screens. The plaincasings should be of PVC. The lower yielding boreholes (50m3/h or less) should be madewith PVC screens and plain casings. The slot size of the PVC screens should be 1 mm ormore. The slot size of the stainless screens should be 0.75 mm or more. The length of thescreens to be determined according to the geological formation and water flow velocity inthe screen.

Kijito Upele and possibly some other old boreholes can be rehabilitated by installing aplastic casing with stainless steel screen together with filter sand in the borehole.

Observation and test holes should be furnished with 4 in plastic casing.

8. TRAINING

The following training needs were identified

Training in technical issues related to Drilling and Hydrogeology

Material procurements and supply procedures, store keeping

- Planning of daily, weekly, monthly, yearly works

- Administrative, personnel and training issues

I• - Management and running of the programme

• The on the job training with discussion meetings wiU continue. As and when suitabletraining courses will be identified relevant people may participate.

™ Each team member will complete four seminar works during 1992. The works will be

Iplanned based on individual training needs of each staff member. At suitable times seminar

meetings will be arranged for discussion and presenting of the completed works.

I Mr. Hamad Bakar will discuss with the staff and further clarify the training needs and he

will accordingly plan and identify the individual seminar works.

I The expatriate advisor will discuss and advise and arrange relevatn training material as and

when required

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I

• - .-.II ' • : ; • • •

I• . • ' • • • • • ' • • ' • / • • • • ' • • • : • • ' • ' • ' , , ' • 7

9. WORK PROGRAMME FOR THE HYDROGEOLOGY TEAM, May - Dec 1992

I1. To prepare a schedule for this work plan

• 2. To communicate the contents of this work plan to the Pemba team

I 3. To analyse the monitoring results of Pemba

14. To complete the following four (or more) seminar works as a part of training programme.

Planning and follow up responsibility with Hamad Bakar.

I - Preparation of job descriptions to all staff

Management of work plan implementation, including definition of staff needs,training needs, organising of works in the field.

• - Material supplies to the field units, including procurements, local and overseas.Technical seminar work

I Borehole designTechnical solutions in problematic situations at the drilling site

I Safe working habits

Correct way of handling hand tools

™ 5. Geo-electrical soundings as per the Annexes 3 - 5.

I 6. Drilling of test and production holes, in the following order. The order may be changed ifnecessary.

I 1. Kijito Upele, 2. Mtoni, 3. Bububu ( after the interpretation of sounding results )Mwembe Chomeke ( Two B-Holes) 4. Mkoani (Uweleni, Changaweni, Mgombeni)

I •••'••- Analyzing the soil samples in Dar es Salaam University, Geology DepartmentPreparation of geological logs of the BH:s and borehole reports

| 7. Pumping tests of the new production holes

•

Registering the results

Drawing of drawdown/time - curves- Calculation of aquifer parameters

I 8. Monitoring of local wells as per longterm programme of Annex 9.

I - Water table monitoringConductivity monitoring

• 9. Water quality and environmental monitoringas per the environmental work programme

I

I•• • • • • • . " • • . . ••• • • • ' ' . " • • . • " • : V • ' • • 8

• 10. LITERATURE

I1. Zanzibar Urban Water Supply Development Plan, 1991-2015, September 1991

2. Zanzibar Urban Water Supply Development Plan, Water Resources Study, April

• 1 9 9 1

3. A Review of the Hydrogeology of Zanzibar Island, J. Johnson, 1982

II•IIIIIII•III

4. Report on the Geohydrological conditions governing the Zanzibar Town WaterSupplies, G. M. Stockley, 1951

II_ LIST OF ANNEXES

1. Instruction for| environmental protection

I 2. Boundaries of the• catchment areas, Mtoni and

Bububu springsi

3. Geo-electrical surveyI programme for the Mtoni• and Bububu spring• catchment areas

4. Geo-electrical surveyI programme on Unguja Island

• 5. Geo-electrical survey• programme on Pemba Island

| 6. Geo-electrical surveyresults

• 7. Interpretation of Geo-electrical survey results

iI

•i

IIII

•

8. Potential drillingsites

9. Local well monitoringI results

• 10/ Water table fluctuation| map, Unguja

I 11. Pumping test results,- Kijito Upele

•i

i

1

ANNEX 1

Instruction forenvironmentalprotection


ANNEX 1 1/1

PROTECTED AREA PLAN AROUND WATER INTAKES

A - ZONE

RESTRICTED AREA

No human activities allowed

The immediate vicinity of the springs and boreholes should beprotected by fence- The oval shaped fenced area should reachabout 100 m upstream from the Mtoni and Bububu springs and 50mdownstream from the spring. With the boreholes and other springsthe size of the fenced area will be depending on localconditions

In the fenced area admittance should be prohibited. Only watersupply related operations should be allowed.

B - ZONE

PROTECTED AREA

Only limited and controlled human activities allowedConstruction and waste management to be planned according toinstructions and approval of the Water Authority

The whole catchment area should be protected as follows:

existing settlements without reliable sewerage shouldbe gradually removed and no new houses should be allowed

- factories, industrial establishments, livestockbuildings, fodder storage, silos etc. should not beallowed

improper removal of soil, trees and vegetation as wellas digging of holes should not be allowed

transport or storage of dangerous chemicals, dumping ofwastes, agriculture, improper use of fertilizers andpesticides, cemetery should not be allowed

The catchment area nearby the existing settlementsshould be surrounded by clear instruction sign boards,mounted in cement.

IIIIIIIIIIIIIIII

III

ANNEX 2

Boundaries ofthe catchmentareas, Mtoniand Bububu

| springs


ANNEX 2 1/1

'••=?r-tr*~'f

C?JJ.*Kikiiangoni \ 2r~--l/ -;•

Bt^T

kp^m^^

BOUNDARIES OF THE CATCHMENT AREAS, MTONI AND BUBUBU SPRINGS

III

ANNEX 3

Geo-electricalsurveyprogramme forthe Mtoni and

| Bububu springcatchment areas


ANNEX 3 1/1

n; a* B 12 13 it is. (i I

GEO - ELECTRICAL SURVEY PROGRAMME FOR THE MTONI AND BUBUBUSPRING CATCHMENT AREAS

•r

ANNEX 4

Geo-electricalsurveyprogramme onUnguja Island


ANNEX 4 1/1

Hi^r^l^&w

GEO - ELECTRICAL SURVEY PROGRAMME ON UNGUJA ISLAND, DRILLINGAREAS

Carnp I<-i~cd


ANNEX 5

Geo-electricalsurveyprogramme onPemba Island


ANNEX 5 1/3

i V i- f V-* 1-^. ", .1 d i l l » -sZZ^r , --' '. • J — , ^.'^,.. • - . , • _ - 4 • -^ T -f •••-•! T •• . /it, u - r :

GEO - ELECTRICAL SURVEY PROGRAMME ON PEMBA ISLAND, MKOANI


ANNEX 5 2/3

* m* »M»;

GEO - ELECTRICAL SURVEY PROGRAMME ON PEMBA ISLAND, CHAKE CHAKE


ANNEX 5 3/3

W ^ - ' / W " •.:•••'<.•••:

GEO - ELECTRICAL SURVEY PROGRAMME ON PEMBA ISLAND, WETE

Geo-electricalI survey results

ANNEX 6

ANNEX 6 1/5

Kijito Upele 1

Kijito Upele 2

Point[So]

, 123456789

1011121314

Layer[Ho]

1234567f

Point[NO]

123456789

101112131415

jayer[No]

1234567

AB/2[E]

1.001.502.003.005.007.00

10.0030.0050.0070.00

100.00120.00150.00200.00

Res[ohm]78.4676.180

12.24235.35956.81349.43910 RTT

AB/2[l]

1.001.502.003.005.007.00

10.0015.0020.0030.0050.00

. 70.00120.00150.00200.00

ResI ohm]187.706

9.02714.49929.94549.12229.37716.458

Res[ohm]

66.60067.00069.50056.40020.00016.0009.000

18.20021.70023.60035.50024.12021.20021.000

Thick[i]

1.7394.2935.6274.4332.353

11.350

Res[ohm]

160.000119.00046.00037.00014.00011.00014.00025.00017.00020.00020.00017.00018.00024.00019.000

Thick[i]

0.9633.1385.7343.6151.8058.000

Depth

M1.7396.032

11.65816.09118.44429.794

Depth[i]

0.9634.1019.836

13.45115.25623.256


ANNEX 6 2/5

Kijito Upele 3

Kijito Upele 4

Point[No]

123456789

10111213141516

Layer[No]

1234567

Point[No]

123456789

101112131415

Layer[No]

1234567

AB/2[I]

1.001.502.003.005.007.00

10.0015.00

. 20.0030.0050.0070.00

100.00120.00150.00200.00

Res[ohm]64.20410.399

9.27532.06455.36846.31225.533

AB/2

N1.001.502.003.005.007.00

10.0015.0020.0030.0050.0070.00

120.00150.00200.00

Res[ohit]91.856

9.50110.93628.48047.59431.77922.373

Res[ohmtj

66.00049.00080.00032.00016.00012.00013.00011.00012.0009.000

20.00022.00023.00028.00020.00030.000

Thick

[•]1.3104.7648.2744.1031.992

10.992

Res[ohu]

123.00058.00023.00043.00021.00014.00013.00012.00015.00020.00017.00019.00025.00024.00023.000

Thick[i]

1.4494.1466.4653.9332.7269.215

Depth[i]

1.3106.073

14.34818.45120.44331.435

Depth

W1.4495.595

12.06115.99418.72027.935

ANNEX 6 3/5

Kijito Upele 5

Mwembe Chomeke 6

Point[NO]

123456789

10111213141515

Layer[No]

1234567I

Point[NO]

123456789

10111213141516

Layer[No]

12345

AB/2

[i]1.001.502.003.005.007.00

10.0015.0020.0030.0050.0070.00

100.00120.00150.00200.00

Res[oiuni]130.561

6.1808.233

27.03849.70432.158n U7

AB/2

[l]1.001.502.003.005.007.00

10.0015.0020.0030.0050.0070.00

100.00120.00150.00200.00

Res[ohm]163.237

6.78746.609

114.54423.973

Res[ohui]

112.000103.00081.00041.00012.0008.0008.0008.5009.000

10.50012.00014.00013.90015.JO15.00014.500

Thick

M1.1875.4938.7474.6971.8458.392

Res[ohM]

168.000134.000108.00068.00025.00012.00010.00013.00016.00022.00029.00036.00042.00045.00047.00039.000

Thick

[t]1.4356.220

19.73732.221

Depth[i]

1.1876.680

15.42720.12421.96930.361

Depth

[i]1.4357.656

27.39359.614


Mwembe Chomeke 7

Mwembe Chomeke 8

ANNEX 6

Point[No]

123456789

10111213141516

Layer[Nol

1234RJ

Point[No]

123456789

10111213141516

Layer[No]

12345

AB/2

[I]1.001.502.003.005.007.00

10.0015.0020.0030.0050.0070.00

100.00120.00150.00200.00

Res[ohm]350.54711.28026.35587.440V Qift

AB/2

HI1.001.502.003.005.007.00

10.0015.0020.0030.0050.0070.00

100.00120.00150.00200.00

Res[ohma]153.06419.16710.20875.45923.352

Res[ohm]

400.000330.000286.000179.00082.00050.00018.00019.00019.00023.00029.00028.00034.00034.00044.00044.000

Thick[t]

1.8845.220

31.83033.856

Res[ohm]

146.000120.00093.00054.00028.00021.00016.00014.00013.00011.50015.00024.00022.00026.00027.00025.000

Thick[i]

1.1494.998

23.90230.010

*

4 / 5

Depth[i]

1.8847.104

38.93572.790

Depth

W1.1496.147

30.04960.059

iiiiiiiiiiiiiiiiiiii

Mtoni 9

• : .

;

Mtoni 1

Point[Jfo]

123456789

101112131415

layer[No]

1234

ANNEX 6

AB/2[i]

1.001.502.003.005.007.00

10.0015.0020.0030.0050.0070.00

100.00130.00140.00

Res[oflM]13.14152.31183.86926.074

Res[ohm]

11.90014.00015.40019.20023.30026.30031.00037.00041.00044.00044.30039.00032.50028.40028.000

Thick[•1

2.0159.2187.038

5 / 5

Depth[i]

2.01511.23318.271

Point[No]

123456789

10111213141516

Layer[So]

1234

AB/2[a]

1.001.502.003.005.007.00

10.0015.0020.0030.0050.0070.00

100.00120.00150.00200.00

Res[ohm]231.30213.84749.71231.000

Res[ohu]

236.000253.000227.000175.000114.00096.00039.00013.50021.00018.00021.00031.00033.00028.00027.00028.000

Thick[i]

2.92312.9125.122

Depth

W2.923

15.83520.957

ANNEX 7

Interpretationof Geo -electricalsurvey results

IIIIIIIIIIIIIII

..Clay and marlLoam

Top soilClayey soilsSandy soilsLoose sandsRiver sand and gravelGlacial tillChalkLimestonesSandstonesBasaltCrystalline rocks

Resistivity, ohm-meters10' 101 103 10' 10s 10s

Approxima te Correlation with GeologicalFormation and Apparent Resistivity

IIIII

Weighted RMSs 1,8

PI£££0u

1¥•H

•H¥

LHIaa

10*2 r

10*1 -

IM10*0

, u UMTONI NO: 10 ,Schlumberqer Connquration

10*1 10*2Current Electrode Distance (DB/2)

10*3

1¥•H>

¥

aai

,u J i l l .Schlumberqer Configuration

10*2

10*1Current Electrode Distance

10*2

Res Thick Depth

„,„, . . ! OOPE NO: OpScnlumberqer Confiquration

No Res Thick Depth

Current Electrode Distance (M) [ i ]

1¥

>•HVVI

•H«

aac

Juembe Mchoieke, NO: 0?Scnluierqer Contiquration

Res Thick Depth

Current Electrode Distance (M) M

?¥•H>

•H¥

Vl•H

illaa

10^2 :

! 1W •

\n1 W

,. JEMBE NCHOPE NO: 0^Schlurnberqer Configuration

101 10A2Current Electrode Distance (AB/2) [ml

10A3

HILlac

, KIJITO UPELE MOs 05,Schlumberqer uonfiquration

No Res Thick Depth

10*0 10*1 10*2Current Electrode Distance (flB/2)

10*3

HJITO UPELE p 0 1 ,thlumberqer Configuration

nE£

0LJ

¥•H>

•rl¥

HI•H

Hi

LIaac

Res Thick Depth

Current Electrode Distance (AB/2)

1•H

¥

0!

Qac

„ HJITO UPELE MDS 03.SchliDerqer Connquration

\n

| M

• i i

x 4.

• •M>"i"iri>v • i k • • J 1 . . . J 1 ' • I • 1 It1

T

_j i i i i i i i I t i i i t i I

10A0Current Electrode Distance (AB/2) Ed

10A3

Weighted RHS: 2.6 KIJITOUPELEN0:&2,bcnliDerqer Confiquration

n££I0LJ

¥•H>

¥

III•H

III

aa

10*2

10*010*0

No to Thick Depth

Current Electrode Distance ffi/2)10*3

UeiohtedH: 3,5 ft HJITO IJPELf NO: 01.Schlumberqer Configuration

¥•H>

a

a

fies Thick Depth

Current Qectrode Distance (AB/2) EnO

ANNEX 8

Potentialdrilling sites


ANNEX 8 1/4

I School

« .ZANI236 .,fMwapyanya ^ - ^ A - — *

--j T ^ - : j.o T

M A1 S'i N 0 IN1 \ - -.,....

T VI.' . T-VA-1

' ! . • • ' • • ' • T !• .-1 -•"• T i V i t "

d~K TJ

VT(

POTENTIAL DRILLING SITES, ZANZIBAR TOWN Observation hole


ANNEX 8 2/4

I.'a,LAil.!i_A i l,,.J &M::£<?i^^L!^^

•p^jl^^^l^: ̂ V^"-;r"?^>p^^;

POTENTIAL DRILLING SITES, MKOANI


ANNEX 8 3/4

" ^ ^ • j t y i y L / j : / y v / ys^t+jz*•<•'•£••&£

)

POTENTIAL DRILLING SITES, CHAKE CHAKE


ANNEX 8 4 /4

, ' • . ' : ? • • , ' • '

Police Ej

FK ^

:ambweIkug „

Mianiinl3te£^!

fiti"I VJ

•V

ML

;cc:

• Ki'gongbnl-'^v-'? 1~: ; •.'' ' , • ? ; « ' t

-••••^••-^•-j-^

POTENTIAL DRILLING SITES, WETE

ANNEX 9

Local wellmonitoringresults


KiSAKASAKA - WELL NO. 1SWL (m)

5.4

S.2

B

4.B

4.e

4.4

4.2

4

Juit Jul A»tfl»»pO«lNwO»eJ«nF»bM«rA»>«M«yJun Jul

1990 - 1991

KISAKASAKA - WELL NO. 2

4.3

4.1

3.8

3.7

3.8

3.3

3.1

2.9

2.7

8WL(m)

1990 - 1991

MKUNGA - WELL NO. 3SWL (IB)

1990 - 1991


FUONI - WELL NO. 4

14.3

14.1

I S *

1S.7

13.6

13.3

16.1

11.9

1980- 1891

FUONI - WELL NO. 5

13

12.8

12.6

1S.4

12 J

IS

11A

1 1 *

11.4

11.2

11

8WL(n)

1880-1881

FUONI - WELL NO. 6

11.4

It

10.8

10.4

10.1

10

0 *

9 4

A 6

n

••A

n

: • .

' • ' • :

' : • : •

V::

— • -

1880-1881


JUMBI - WELL NO. 7

12.412 3.

12

11,611.4i i i

ii10*10*10.410.2

10

1990 - 1991

JUMBI - WELL NO. 8

*1

20.7

20.4

J0.1

19 M

1*Jt

4 *

• - -

\

. . . . .

_ _

V-1

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—

-I

n

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n

—

1990- 1991

TUNGUU - WELL NO. 10

17

16.S

10.4

ie.218

10JB

16.6

10^4

4M

BWL(m)

— —

Rf?-

•i.

;-\ » ;

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[1

11

—

1990 - 1991


KOMBENI - WELL NO. 110WL<m)

11.0

11.4

11.Z

11

103

io.e>

10.4

10.* I : > • • • ;

-

—

M

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66.6

4.S4

3.63

2.8£

3.0

3.2

2.9

3.0

2.3

1.7

Jul Aug»*pO«*lc>iO»e

1990-1991

MWERA - WELL NO. 12

a• ' • * ••••••

: • • • • :

OWWtTOW• ; - :

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•

F—I

n

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-

i i

i I

1990 -1991

MWERA - WELL NO. 13

*mJwi M Aup»«p

1990 - 1991


MWERA - WELL NO. 14

10.0

10. *

10.1

B-B

9.7

OJt

0.3

BJJ

8.7

8WL(m)

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"—

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1W0-1991

KOANI - WELL NO. 18

7.87.77.67,37.16.86.7

e.o6.38.1e,8e.76.6

JUT Jutt8»0 - 1991

KOANI - WELL NO. 198WL(m>

IS

11

10.S

10

ft

1990- 1991


PONGWE - WELL NO. 20

wn.(m>12

11JJ

11

104

10

8.6

Iff •*••

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H1 Hin• : : : :

r—i

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n

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1990 - 1991

PONGWE - WELL NO. 21

10JB

to

8WL(m)

7

e0.0

: • : • ; •: • : • ' : •

—

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• • • • • :

Jim Jul Aug

1990- 1991

KIANGA - WELL NO. 23

1 7 *1T

10*41O(*

1413,41*-B

I I J B11

10/4

9M

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yy.

— _ _

—

•A

tt-rn —

n• ; • ;

; : ; • • :

: • . :

Jim JwlAug»*p

1990 - 1991


MWERA - WELL NO. 24

e.ea

r.eT

6.66

4.64

3.66

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n

—

n

::-;:

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n

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. V .

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1890-1881

MWERA - WELL NO. 26

16

17.S

16JB

10.4

IB

14JS

8WL («)

1980- 1881

MWERA - WELL NO. 28

7t.6

B

4.64

3.6

ZS*

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—

a

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Jim JulAug»*pO«tN«wCkMJ«nF*bM«rApiM^Jiii) Jul

1990 - 1981


FUONI - WELL NO. 32

9.0S

a.6

7

e5.8

«4.6

e.8

1990 - 1981

FUONI - WELL NO. 34

16JB

l«-k

16.6

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BWl (re)

H '1———

—• • • • •

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, :

1990 - 1991

FUONI - WELL NO. 36swL(n>

4.0

4

1.6

1990-1991


MACHUI - SPRING NO. 378WL(n>

1,0

\A

1.1

1

0.8

0.6

0.4

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- . . . •; • . - . - . - •:

[i, :•!•.• !

liii.i

, , - . . . , • - : , • : ; , ; ; . . : , : . ; • . *

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:- :.:..- ; . . : - — jv - :.,; - .V. - :."|-..•:•

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1980 - 1891

MACHUI - SPRING NO. 38

1,2

t

O.S

0.6

0.4

0,2

9WL(n)

v!

• • : :

•:•:•

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77

. : • : •

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1890 - 1991


6.3

tt

5.75.4B.I*A4.64.43.83.63.3

3£.7

SWL(n>)

to7-

V

• : • >

-• • • '

n; • • • • • • :

•

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_

Jun Jwl Au

1980 - 1881


KIANGA - WELL NO. 42SWL(m)

e8.6

e4.»

4

3.6

3 El • : • : • OUT WIT BUT BRVMYWW BUT BUT OUTBRT WWWtYWIY

1990 - 1891

MKADINI - WELL NO. 43

7.87.86.80.3

6.34.84.33.63.3

9WI

n • . • . • • :

s•>•}

...'_

— -

'•'.

' ' . ' . ' • -

—

—

1990 - 1991

KIANGA - WELL NO. 44BWL (m)

4.04.44.2

43.83.63.43,2

9iB2.02.4i.3

-

. • : •

: • : • :

-

-

—

•

• ; • • ;

' • : • :

' • ' • '

•

•

-

-

-

—El•

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Mi JulAug»*pO»«MwCfeJ«nF»bM«rAprt4«yJun Jul Au«»*pOctMmO«c

1990-1M1



0.1

6.34.a4.64.13.73.3

8.6M1.71.3ft A

• • • : : • ; • • •

- - • : •

• ' • ' .

• • • • • •

" ;

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: : ; • •

. - • . • :

77:

Jm Jul Ai«»«pO«1Mm«MJwiF«M4arApA4«>'Jun Jvl Aug»«

1990 - 1881


9.0S

8.6

8

eB.6

64.6

4

8WL («)

1990 - 1991

KIANGA - WELL NO. 47WL(nt

ee.e

s4.6

4

3.0

'A-

(—1

• • • : •

• ; • •

d.....

. . • . •\ • . •

••;•

T

: • . :

• • • • ;

R

• : : - : ¥:• • : - •

:•'•'

1990-1991


KIANGA - WELL NO. 48SWLCn)

e

4.8•

3.63

S.O

i1.5

10.6

8

6.6

S

4.0

4

3.B

3

2.6

2

1.6

SWLfra)

9

2.T

t.4

1.1

1.8

1.6

1990 -1991


arAprMayJwn Jwl Aug»*pO«INo<OM

1890 - W8T


• : : . -

. :

-

n

' : • • : • ; • ; • •v;

—

• : • : •

p i-

•

• . - •

BUT

1990 -1991


DOLE - WELL NO. 52

£.6

a.e

B.4

a.a

c

1.8

1.4 : • • • : • • • ; • ,

, ; .

. • ' • •

••••-•

• • : :

n

••••- •;••"•

:-V:

Jun Jiil AiiB»»pO«lN«O^JMF#bM«rApiMwJwi Jul Auo»*pC1990 -1991

KIDIMNI - WELL NO. 539WL<W)

e.e«^

eT.77.47.16.66.6e.s

S.6

1990 - 1991

KIDIMNI - WELL NO. 54

10.1

e.7

8.1

7.7

73

9WL(n)

n

• I * .

—

- •

: 1:; ••M

•:-•: :¥:

Jim Jul AtiflS«pO«M0«O*«JanF»M(vA»ifttayJun Jul>1990-1991



e.e

6.3

B.7

8.4

S.1

7.57.2

e.e

9.0

MfVLfa)

J I M JulAug»«pO«tNovD»cJ«nF»bMarA»rMayJwt Jul Aug»*f>OttNMD*e

1990 - T991

KIDIMNI - WELL NO. 56SWL(m)

6.4

0.2

6

8.9B.B

e.48.2

«

7.B

7.0


11.110410,610,2«.«9.6

6.7•.48.17J

8WL(l»)

Jim Jul A

1TOO-1W1


KITUMBA - WELL NO. 58

•

a.e

A.4

B.2

e

7.e

7,e

7.4

7.2S"

p i

_

n.

n• ; • • • •

—

— :

• • :

• . • • :

—

Augft*pO«tNoMP««

1990 - 1991


10.3

10

9.1

B.6

B.2

9WL(n)

Jun Jul Au«»*pOc1No«O*cJ«nF»M(«rApiM«)^un Jul/

1990 - 1991


10.7

10JB

10.1

9WL(m)

9.1

8.7

— — -

a: • : • •

: .

- '

sR

> • • • • • ;

• : • :

•••••''•

.•'.•'.

• - • * '

1990 - 1991



10510

8.48.1BJB

BJB

6.2TM7 *7.3

T

(n)

H

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—

— -

- .|x

. 7 T PI -r:

s

. ; . ' • : •

—

—

—

Jon J ul Aug»«pOcttMO*0j«iF»bM»rApiMa><Juii Jul1890 - 1881


11.7

11^

11.1

10.6

10*

10.2

6.6

9*

»

(m)——

—

—

E l

•:•:

- • • '—

. . . . . . .

1•v : .

1990 - 1981


1 *

11.611.210410.4

108.0».£B.88.4

e7.e7.£

9WL(m>

—

-

-

-

•

• : • : •

-

-

• • • :

•

•

• V

-

-

-

: • : • :

-

1990-1981



10

14

13

IS

11

10

SWL (m)

1890-1991

KWAMBANI - WELL NO. 65SWL(m)

14.314

13,1i2JB

W*\22.11.81UBMA

1990- 1991

KIBOJE - WELL NO. 66

17.7

17.1

183

MA1 * A

—

—

• • : • • :

—

—

—

• : • : •

4"

•PI• • •

y

- -

— -

1990- 1991



20.080,118.719.318.6

18.117.717,8

" • *

10.1

10.34 1 O

BWl <n>

If: • . • :

• • : :

Fl. : •

• • ' . • :

?.•

: -

; • • '

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Jun Jul Au «J«nF»bMftrApiM«)slun Jut Au«8*pOcM««D*«

1990 - 1991

KIBOJE - WELL NO. 688WL(i»>

17.2

10.3ie

J6.7MA10.1

Jun Jul Aug>*pO«Wo«D*oJanf»M4«rAp(MByiJun Jul AugM

1990 - 1991


maSWL(ll)

18.71S.418.)17417JB

— . . . .

I-

.. •

: • ' : • '

-

Si

• - • -

-

r ....

: • • ' :

• j .

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1990-1991



22322.221*11*

9WL(»>

1120.720.420.1t»J18.6

1BJB18.S

• - —

—• ; • . •

&

' -

- • • • ;

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• : • : • ' •

II

I!

— -

: • :

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JunJwl

1990 - 1981


M.1SWL (m)

22.7

ttJB

28.1 a BUTDinr DRTDHYBHTOHTDHT DRTMT

-

DAT

Jwi Jul1990-1991

KIZIMBANI - WELL NO. 72

2.4

is

2

1 . H

i.e

1.4

1.2

1

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0.0

- —

: : • :

-

•

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•

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-

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-

-

-

'I'"'1'

•

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: • : •

•

1990-1991


MNDO - WELL NO. 748WL(m)

6.3

S.1

6.9

e.7

C.ff

5.3

».1

4,8

4.7 I OfPf DKT DAT WiV PWftW&W WIYMfV

• : v

-

• : • : •

• • • • :

: • : • : • our WIT WIT

Jim Jul Aug»»pOctN«v0««J*nF*bMvA|»M«yJun Jul Aug»*pO«1N«vD*«

1890-1991

MKANYAGENI - WELL NO. 75

9.2

7.4

6.6e.«0.8

S.4

e4.04.2A A

(n

n

HR1

: • : :

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• :;i;j

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1990 -1991

MTAONA - WELL NO. 76

108WL(m)

1614.B

1413.6

1312.0

IS11.6

11

10e.6

1990-1991


BUMBWISUDI - WELL NO. 77

•.a

8.4

s7JB7.67.47.2

7e.»e.e6.4

8WL<n>

ill

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Jim Jul A u g ^ Aufl***1890 - 1991

10.410.10.8

9M

7.7

7.1e.8

BUMBWI SUDI - WELL NO. 788WL(m>

Jui) Jul AugS*pOeM«D*«JanF*feM«rApiM«)(J«jn Jul Au«»*pOo1NovD*e1990 - 1991

BUMBWI SUDI - WELL NO. 82

8.23

ca2.02.4

21.8

i.e1.41.2

1

1990 - 1991



&48.2

firjt

7.*/ . *

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9.4B.2

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Jwi Jv\ A Aug»«pOctN««DM

W90 -1991

BUMBWI SUID - WELL NO. 84SWL(m)

2.62.3£.11.91J1.61.91.10,»0,7Q-60.6

1990 - 1991


4.44.2

43.B8.S3.43.2

3t»2.81.42.2

1.8

„—„— _ _

M V twv PIT m •#¥ PW pit pit r'"'"l '•'•" •;•;»;

• • * * ~ " - ~ ~ * — " • " " " " "

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^«»#fC«<MosO^,1990-1991


NDAGAA - WELL NO. 879WL(m>

10.818.61 * *

1817.717.417.116.816416.2

19.316

14.T14A

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n n

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1990 - 1991

NDAGAA - WELL NO. 88

19J6

ISA18.4

1817JB

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W*

14.84A A

BWL(n>II. . ^

MM

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Jun Jul

1990 - 1991


17

1«

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i«»*p *«JanF*H( v Aug»*pO«1N«*D#«

1990 -1991


KIBOJE - WELL NO. 918WL(lt)

10

14-814J13JB

1312.411411.210*

10

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1980-1881


ITie1614181311IDe

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17

16.618

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124

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1990 - 1991


KIBOJE - WELL NO. 949WL(m)

14JB

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13.713-413.1MJB1 2 *12.211.4

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1990 - 1991

KIBOJE - WELL NO. 95SWL(m>

18.4IS

16A16.4

10

14J8

14

j

LI

nfVTl. • : • • : f • ! - : :

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JUT JwlAu«»«pO«1No«C>MJanF»Mt«rApiMa)KJufl Jul At*g»«pOcM««*e

1990- 1991

KIDICHI - WELL NO. 96

a.*

s4.74.44.13.63.03.22.B

SWL(n)

mm

i—i

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1990-1991


KIZIMBANI - WELL NO. 97

9.4

».l

8.8

a.e

8.4

a.*

BWL(m

i

nrri;

• &

n • : • : •

: • • -

Jut) Jtil AugtopOetNovDteJanF^bMvApriitayJtm Jul

1980 - 1991

KINUMOSHI - WELL NO. 99

8

2.6

2.2

ft

n n r—.

—

™

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1990 - 1991

KINUMOSHI - WELL NO. 1008WL(n)

2.B

2.fl

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i-- ••:••

••••:

••'••••

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1990-1991


KINUMOSHI - WELL NO. 101

4.23.0a.o3.3

32.72.42,1i.e1.61.20.8

8WL (m)

1—1

siJunJulJ

• ; • • •

—

• - • ; :

kl«»«FOctMMP*cJtai

• • • ' •

Mar

1—1

AfflMayJun Jul

1+

1990 - 1991

MACHUI - WELL NO. 102

e.86.66.4

6.2e

6.4

5.2

6

4.6

4.6

9WL<IB)

—

—

77,

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Hi

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• : • : • :

1990 - 1991

MACHUI - WELL NO. 103

18.111J11.B

10.61 0 j 3

10

1990 - 1991


KIPANGE - WELL NO. 1048WL <m>

1.6

1.4

1.1

I

0,8

0.6

1990 -1991

KIPANGE - WELL NO. 105

e.e9.40.2

B.B8.68.4e.i

87.87.61.47.3

7

SWl in \

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n • : • • •

• : • . •

Jwi Jw I Auo»«pOc1NO«0*«J«nF*i>Mar ApfMayJun Jul Aug»*pOdNMO*«

1990 - 1991

MIWANI - WELL NO. 106

1.4

8WL(m>

—: • • ; - • •

' FT.

. • : • :

JanF^bMwAprMcyJwi Jul Aug»«pO«tN«O»«

1990-1991


MIWANI - WELL NO. 1079WL (m)

3.6a.8

32.7

2.42.11.01.61.20.80.0

Juit Ju I Auge*pOcWowD*«J«nF*i>M«r ApfMayJun Jul AugS*pOctN««D*«

1990 -1991

MIWANI - WELL NO. 108

4.2

4

a.4

1990 - 1991



18.718.3

17.116.716.316*16.616,114.714^313.813.618.1

Jwi M1890 - 1991

KOANI - WELL NO. 111

10.4ie.11B.B

14.3U

13. t -12 J

Jun Jul Aug»*FO«Mo«0»eJanF*bM«rApiMa>iJun Jtil Aw«»*pOc1N««D«01990 - 1991

LOCAL WELL - 19 9 1

VARIATION OF THE STATIC WATER LEVELBETWEEN MAXIMUM & MINIMUM SWL

NO

1

i

3

4

r

€•7

8

9

10

11

12

13

14

IE

16

17

18

19

20

21

2 °-

24

2r

26

-> i

28

29

L. WELL NO

LOCAL WELL NO 1

LOCAL WELL MO 2

LOCAL WELL NO 3

LOCAL WELL HO 4

LOCAL WELL HO 5

LOCAL WELL NO €

LOCAL WELL HO ^

LOCAL WELL HO 8

LOCAL WELL HO 10

LOCAL WELL NO 11

LOCAL WELL HO 12

LOCAL WELL HO 13

LOCAL WELL HO 14

LOCAL WELL HO 18

LOCAL WELL HO 19

LOCAL WELL HO 2 0

LOCAL WELL HO 21

LOCAL WELL NO 2 3

LOCAL WELL HO 24

LOCAL WELL HO 2 6

LOCAL WELL HO 2 8

LOCAL WELL HO 3 2

LOCAL WELL NO 3 4

LOCAL WELL NO 3 6

SPRING HO 37

SPRING HO 3 8

LOCAL WELL HO 4 3

LOCAL WELL HO 4 4

LOCAL WELL HO 45

MAX. SWL(m)

5.46

4.23

2.56

14.33

12.76

11 . 04

11 .92

20. SO

16 .95

11.86

3.73

10.41

•7 "7 1

11 .78

12. 12

10. 05

16 . 84

8.24

17.72

7. 12

9 .29

16 .45

4.71

1 . 75

0. 69

8 . 00

4.61

5 . 67

MIN. SWL(m)

DRY

3. 34

DRY

DRY

12. 31

10.57

11 . 32

19 .56

15.82

DRY

DRY

2 . 70

8 .91

6.50

8 .4E

8 . 57

7.45

13.70

4.47

15.79

4. 31

4.E5

14.61

3.35

1.42

0.62

3.81

2. 30

2.55

DIFFERENCECm)

0.89

0.45

0.47

0.60

1.24

1. 13

1.03

1.50

1 1 11 . M u

3. 33

3 . 55

2.60

3. 14

3.77

1.93

2.81

4.74

1.84

1.36

0.33

0. 07

4. 19

2.31

3.12

NO

30

31

32

33

34

35

36

37

3 3

39

40

41

42

43

44

45

46

47

48

49

50

51

C 1

53

54

58

L.

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

LOCAL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

WELL

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

417

49

50

r t

5 3

54

c c

56

5 7

n a

59

60

61

62

63

64

65

66

67

68

69

70

71

72

75

76

78

82

MAX. SWL(m)

7. 20

6 .04

O "7 1

2.62

8 .53

10. 04

9.58

9 . 50

10.71

8.79

10. 14

10.64

10 . 15

11.47

11 .60

14. 07

14. 40

17. 86

20. 05

17.62

20 . 16

22 . 35

22. 90

2. 16

8.72

15.62

3 . 72

9.56

2.50

MIN. SWLCm)

5. 15

5.25

1 .80

1.63

5.54

6.72

6.64

7.83

6 .98

7.93

7.60

8.80

t * i C

9.59

8.96

5.94

12.72

17.40

17.82

15.31

18.43

20.05

DRY

1.30

7.05

13. 15

7. 05

DRY

1.23

DIFFERENCE(m)

A> *

0.

0.

0.

2

3.

i

1.

3.

0.

2

1.

2

1 .

2.

8.

1 .

0.

2

1 .

£• *

0.

1.

2

1 .

1.

05

7 9

92

99

99

32

94

67

73

86

54

84

39

88

64

13

68

46

23

31

73

30

86

67

47

67

27


NO

59

60

61

62

63

64

65

66

6?

68

69

70

71

73

74

7E

76

77

7 8

79

80

81

82

83

j LOCAL WELL NO

LOCAL WELL NO 8 3

LOCAL WELL NO 8 4

LOCAL WELL NO 8 5

LOCAL WELL NO 8 7

LOCAL WELL NO 8 8

! LOCAL WELL NO 9 01LOCAL WELL NO 91

LOCAL WELL NO 9 2

LOCAL WELL NO 9 3

LOCAL WELL NO 9 4

LOCAL WELL NO 9 5

LOCAL WELL NO 9 6

LOCAL WELL NO 97

LOCAL WELL NO 9 9

LOCAL WELL NO 100

LOCAL WELL NO 101

LOCAL WELL NO 102

LOCAL WELL NO 103

LOCAL WELL NO 104

LOCAL WELL NO 105

LOCAL WELL NO 106

LOCAL WELL NO 107

LOCAL WELL NO 108

LOCAL WELL NO 109

LOCAL WELL NO 111

MAX. SWLCm)

8 .20

4. 05

19.33

19. 22

18. 10

15.73

15.75

16 . 63

14.55

18.67

S.80

9. 38

2.89

2.86

4. 06

6.70

12. 00

1 .24

9.60

3 . 02

3.76

4.51

18. 06

16 .05

MIN. SWL(m)

DRY

1.10

DRY

DRY

18.42

DRY

11.98

10. 05

15 .41

13.42

17.05

3.26

8.61

1.90

2.01

2 24

5.60

8 .90

0.84

8.26

1 .98

2 . 06

3.72

17 25

14. 31

DIFFERENCECm)

1. 17

0.80

3.75

5.70

1 9 9

1. 13

1.62

2.54

0 . 77

0.99

0.85

1.82

1.10

3. 10

0.40

1.34

1.04

1.70

0.79

0.81

1.93

ANNEX 10

Water tablefluctuationmap, Unguja

ANNEX 11

Local wellmonitoring,conductivity

i zanzibar urban water supply project | …...i i i i i i i i i i i zanzibar urban water supply...

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