Minor Irrigation Project of Batch 5

IRRIGATION 2.1 General: Irrigation may defined as science of artificial application

of water to the land in accordance with the crop requirements throughout the crop period for full fledged nourishment of the crop.

NECESSITY OF IRRIGATION:-(1) Inadequate rain fall(2) Uneven distribution of rainfall(3) Growing a number of crops during a year(4) Growing superior crops.

SYSTEM OF IRRIGATION:-In a system of irrigation we have got three components.(1) The source of water(2) Storage system(3) Distribution system

2.2 Advantages and disadvantages of irrigation:

Advantages:- (1)Increase in food production:-(2)Optimum benefits:-(3)Elimination of mixed cropping:-(4)Generation of hydro electric power (5)Domestic water supply:- (6) Facilities of communication:- (7)Island navigation:- (8)Afforestation:-

Disadvantages:(1) Irrigation may contribute to water pollution.(2) Over irrigation may lead to water logging and may reduce crop yields.(3) Irrigation may result in colder and damper climate causing out break of diseases.(4) Irrigation is complex and expensive in itself.

2.3 Water requirement of crops: A water requirement of crop means the total quantity and the way in which a crop requires water, from the time it is sawn to the time it is harvested.

2.4 CROP PERIOD AND BASE PERIOD

CROP PERIOD : It is the “time that elapses from the instant of sowing of crop to the instant of its harvesting”.

BASE PERIOD : It is the “time between the first watering of crop at the time it’s sowing to its last watering before harvesting”.

2.5 DUTY AND DELTA OF CROP

Duty of crop :It is the “numbers of hectors a land irrigated for full growth of a crop by supply of 1 meter cube per second of water continuously during the entire

base period (B) of the crop”.

Delta of crop :it is the “total quantity of water required by crop for its full growth or the total depth of water required by the crop to reach maturity”.

The relationship between duty and delta is given by -

Δ = (864 x B) / D in cm

Where, Δ - is delta in cm. D - is duty in hectors per cumecs. B - is base period in days.

NEW TANK PROJECT

3.1 Salient features of new tank project

1. Name of the project : Construction of minor Irrigation Project. At Kanavi Honnapur 2. Location : village-Kanavi Honnapur Taluq:Hubli. Dist:Dharwad. 3. Distance of project site : 14 km From nearest Taluk HQ 4. Nearest airport and its : 12 km Distance from site 5. Catchment area : 2km2 6. Dependable annual : 635.7 mm avg rainfall 7. Yield available : 0.294m3/sec 8. Storage details Live storage : 0.329Mm3

Dead storage : 0.036Mm3 9. Intensity of irrigation : 90% 10. Embankment a) Top of bund level : 565.0 b) HFL : 563.570 m c) FTL : 562.570 d) Length of bund : 255 m e) Top width : 7.00 m f) Max height above : 554.190 m g) Lowest bund level : 542.070 m

11. Bench mark : 567.340m 12. Capacity of tank : 0.366 Mm3

4.1 Soil Abstract for new site:

Sl. No.Tests

Results

1.2.3.4.5.6.7.8.

Specific GravityBulk DensityDry DensityCompaction TestOptimum Moisture ContentMaximum Dry DensityLiquid Limit Testa. Liquid Limitb. Flow IndexPlastic Limit Testa. Plastic Limitb. Plasticity IndexShrinkage LimitDirect Shear Testa. Angle of internal frictionb. Cohesion (C)Safe Bearing Capacity of Soil

2.3817.29 kN/m3

12.24 kN/m3

19.00 %1.54 g/cc52 %23.1120.48 %31.5212.20 %22°15` 19 kN/m2

108.24 kN/m2

up stream side down stream side

Horizontal filter 30m wide

Free board

H=

NEW TANK PROJECTDAM SECTION Batch no : 05

All dimensions are in mtrs

Sone pitching

GL

Sone pitching

Phreatic line

up stream side down stream side

Horizontal filter 30m wide

Free board

NEW TANK PROJECTPhreatic line Batch no : 05

All dimensions are in mtrs

Lever Arm

0.15m Concret slab

Stone masonary wall

Vertical arm to lift the sluice gate

sluice of 0.5m diameter

NEW TANK PROJECTCROSS SECTION OF SLUICE GATEBATCH NO :05

OLD TANK PROJECT

    

 5

  5.1 Salient features:1.    1. Name of the project : Construction of minor irrigation project at Tarihal..    2. Location : Village: Tarihal. Taluk: Hubli District: Dharwad. 3. Distance of project site : 12kms from nearest taluk HQ 4. Nearest airport : 10km distance from site 5. Catchment area : 2 km2 [from Toposheet] 6. Dependable annual : 635.70 mm average rainfall 7. Yield available : 0.294 m3/s 8. Storage Details Live Storage : 2.496 Mmm3 Dead Storage : 0.624 Mmm3 9. Intensity of irrigation : 90%   10. Embankment Top bund level : 575.900m Flood Water level(FW ) : 574.900m Full tank level (FTL) : 573.900m Length of bund : 265m Top width of bund : 6m Bottom width of bund : 91.00m Maximum height above : 17m lower bund level 11. Type of section sluice : Type of sluice gate: Direct sluice gate. RL: 175-2-1=.175m 12. Bench mark RL : 567.340m

5.2 ABSTRACT OF SOIL

Sl. No. Tests Results

1.2.3.4.5.6.7.8.

Specific GravityBulk DensityDry DensityCompaction TestOptimum Moisture ContentMaximum Dry DensityLiquid Limit Testa. Liquid Limitb. Flow IndexPlastic Limit Testa. Plastic Limitb. Plasticity IndexShrinkage LimitDirect Shear Testa. Angle of internal frictionb. Cohesion (C)Safe Bearing Capacity of Soil

2.6517.62 kN/m3

15.97 kN/m3

14.00 %1.75 g/cc36.52 %10.2017.43 %19.0912.20 %26° 15 kN/m2

115.5 kN/m2

GL

free baord

Horizontal filter of 20m wide

OLD TANK PROJECTDam section of Old tank Batch no:05

All dimension are in mm

Horizontal filter of 20m wide

Up stream side Down stream side

Horizontal filter 30m wide

OLD TANK PROJECTPhreatic lineBatch no : 05

All dimensions are in mtrs

Free board

Sone pitching

Phreatic line

Upstream sideDownstream side

Lever Arm

0.15m Concret slab

Stone masonary wall

Vertical arm to lift the sluice gate

sluice of 0.5m diameter

NEW TANK PROJECTCROSS SECTION OF SLUICE GATEBATCH NO :05

Lever Arm

0.15m Concret slab

Stone masonary wall

Vertical arm to lift the sluice gate

sluice of 0.5m diameter

NEW TANK PROJECTCROSS SECTION OF SLUICE GATEBATCH NO :05