water quality mapping for solapur district using gis

Water Quality Mapping for Solapur District using GIS

Prepared by

Prashant Adsul M. Tech. First Year (113184002)

ES 680GIS for Environmental Planning and Management

Under the guidance of

Prof. A. K. DikshitCESE, IITB

Outline of Presentation

April 7, 2023 2Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Study AreaScope and Objective Water Quality Index (WQI) GIS ApplicationOutput

Scope and Objective

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To study ground water quality of Solapur district using GIS software

To create Water Quality Index (WQI) Generate Ground Water Quality Map based on the

WQI

Study Area

April 7, 2023 4Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Geographically Solapur is located between 17.10 to 18.32 degrees north latitude and 74.42 to 76.15 degrees east longitude. Thedistrict is situated on the south east fringe of Maharashtra State.

The district in general has flat terrain

Area = 14844.6 sq.kms338.8 sq.kms is Urban area 14505.8 sq.kms is Rural area

Tehsils: 11

Data for Analysis

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Three Years (Years 2007-2008-2009) ground water Quality date used calculation of WQI

Data was downloaded from MPCB website

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Methodology for Data Interpretation

(Ramakrishnaiah et al, 2009)

Each of the groundwater samples were analyzed for various parameters such as pH, total hardness, calcium, magnesium, chloride, TDS, fluoride, nitrate, sulphate, manganese and total alkalinity

Computing WQI of Groundwater, three steps:

Data Source: MPCB website (2007-2008-2009)

April 7, 2023 7Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Method for Calculation of Water Quality Index for Ground Water

(Ramakrishnaiah et al, 2009)

Step IIThe relative weight (Wi) is computed

Step I Each of the selected parameters has been assigned a weight (wi) according to itsrelative importance in the overall quality of water for drinking purposes.The maximum weight of 5 has been assigned to the parameter nitrate due to its major importance in water quality assessment. Magnesium which is given the minimum weight of 2 as magnesium by itself may not be harmful

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Method for Calculation of Water Quality Index for Ground Water

April 7, 2023 9Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Method for Calculation of Water Quality Index for Ground Water

(Ramakrishnaiah et al, 2009)

Step III

A quality rating scale (qi) for each parameter is assigned

qi = (Ci/ Si) x 100

where qi is the quality rating, Ci is the concentration of each chemical parameter in each water sample in mg/L, and Si is the Indian drinking water standard for each chemical parameter in mg/L according to the guidelines of the BIS 10500, (2004-2005

April 7, 2023 10Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Method for Calculation of Water Quality Index for Ground Water

(Ramakrishnaiah et al, 2009)

SIi is the subindex of ith parameterqi is the rating based on concentration of ith parameter n is the number of parameters

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Water quality classification based on WQI value

All WQI calculations are performed in Excel

Steps in GIS Project

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Base Map of Solapur

Georeferencing and Rectification

Shapefile Creation-Polygon

Digitization of Map

Analysis

Attribute Data Entry

Result Determination based on conditions

Set Layer Property

Spatial Query

1 Geo-referencing

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Base Map of Solapur

April 7, 2023 14Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Source: Google Maps

1 Geo-referencing

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Checking RMS Error

2 Creating Shapefile

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April 7, 2023 17Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Creating Shapefile in ArcCatalog

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Creating Shapefile in ArcCatalog

3 Digitization of Map

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April 7, 2023 20Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Digitization of Map in ArcMap

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Digitization: Tehsil

4 Attribute Data Entry

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Attribute Data Entry

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Attribute Data : Joining Excel Data

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Attribute Table: Water

5 Set Layer Properties

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Label Expression (Tehsil Layer)

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Label Expression (Tehsil Layer)

6 Spatial Query

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Tehsils< Nitrate 45 mg/l

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Tehsils> Nitrate 100 mg/l

7 Output

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April 7, 2023 33Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Tehsils: Nitrate Conc. Map

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Nitrate Conc. : Bar Chart

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Pie Charts: WQI, Nitrate and pH

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Bar Charts: WQI, Nitrate and pH

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Total Hardness mg/l

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Tehsils: Excellent Water Quality Based on WQI

8

Output for Printing and Publications Purpose

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April 7, 2023 40Water Quality Mapping for Solapur District using GIS Prashant Adsul, CESE IITB

Tehsils: Nitrate Conc. Map

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Tehsils: Water Quality Map

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Create Reports

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Create Reports

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Conclusion

Sangola Indicates Excellent Water Quality. Water Quality Index is affected by Nitrate conc. Agricultural runoff is the major contributor to the nitrate contamination in ground water.

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References1. Ramakrishnaiah, C.R., C. Sadashivalah and G. Ranganna,2009. “Assessment of water

quality index for the groundwater in Tumkur Taluk, Karnataka State”, Indian J. Chem., 6: 523-530

2. MPCB report on water quality report for Maharashtra State

3. Yisa J. and Jimoh T. “Analytical Studies on Water Quality Index of River Landzu”,2010 American Journal of Applied Sciences 7 (4): 453-458

4. Lecture Notes for Course ES 680 by Prof. A.K. Dikshit, CESE IITB Mumbai

5. Google Maps

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Acknowledgement

Prof. A.K. Dikshit

Mr. Nishit AmanMs. Arleen KaurES 680 GIS Group