Development of Different Thematic Layers for the Identification of Artificial Groundwater Recharge Zone around Devi river, Odisha, Using Remote Sensing GIS and AHP Technique(MCDA)

Anshuman Swain¹ and DC Jhariya²*
¹M.Tech Scholar, Department of Applied Geology, National Institute of Technology Raipur, G.E.Road, Raipur - 492 010, Chhattisgarh, India
²Assistant Professor, Department of Applied Geology, National Institute of Technology Raipur, G.E.Road, Raipur, Chhattisgarh, India
*Corresponding Author: DC Jhariya, Assistant Professor, Department of Applied Geology, National Institute of Technology Raipur, G.E.Road, Raipur, Chhattisgarh, India.

Published: January 31, 2023

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Abstract  

Groundwater recharge zones in Devi watershed, Odisha, India, have been mapped for the first time as part of a study. The research was performed by delineating possible recharge zones in the Devi watershed utilizing geospatial techniques and a Geographical Information System. The factors used to estimate the Groundwater Recharge Potential Zone comprise lithology, geomorphology, drainage patterns, precipitation, soils, and land use-land cover (LULC). SRTM Digital Elevation Model (DEM) was used to obtain the slope. The Analytical Hierarchical Process (AHP) method is based on subjective approach in which weightages are assigned by pair wise comparison between various criteria obtained through policies by decision makers Saaty (1980). The Analytic Hierarchy Process (AHP) method calculates the required weights associated with the respective criterion map layers with the help of a preference matrix, in which all relevant criteria identified are compared against each other on the basis of preference factors then the weights are aggregated. GIS-based AHP has gained popularity because of its capacity to integrate a large quantity of heterogeneous data. This GWRZ statistics will be valuable in identifying optimal areas for water extraction in the research region. According to the groundwater prospective map, the SW parts of the territory have very poor, as does the SE part to some extent, while the majority of the land has good groundwater recharge possibilities. Moderate groundwater recharge are limited primarily to the North West terrain and population regions similarly some areas in E and SE parts showing very good possibilities of artificial recharge zone in the watershed.

Keywords: Devi River; Watershed; Groundwater recharge zone; RS; GIS; AHP Technique; MCDASS; Odisha