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Accueil du site → Doctorat → Inde → 2017 → Assesment of area and water allocation in canal command of purna irrigation project using SWAT

Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani (2017)

Assesment of area and water allocation in canal command of purna irrigation project using SWAT

Chavan, Madhukar Lombha

Titre : Assesment of area and water allocation in canal command of purna irrigation project using SWAT

Auteur : Chavan, Madhukar Lombha

Université de soutenance : Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani

Grade : Doctor of Philosophy (PhD) in Irrigation and Drainage Engineering 2017

Résumé partiel
Agriculture is the primary consumer of water a complex natural resource but its availability is highly uneven in space and time. Since the demand of water in the non-agricultural sectors is increasing day by day, its share for agriculture is expected to reduce. Management of surface water available in river basins is the major challenge due to its low water use efficiency and equitable distribution. Consequently, major research challenges are therefore to grow more food from less water that maximizes water-use efficiency and available water supply to all farmers in command area. The modern GIS techniques coupled with hydrological models can quickly guide the management in decision making, since the temporal and spatial dimensions could be studied at once. Hence a study was undertaken to quantify the surface water resources within the catchment area of Purna reservoir a major irrigation project in Marathwada to assess the total water demands with major crops cultivated using Soil and Water Assessment Tool (SWAT) model. Study also was aimed to analyse the existing water allocation strategies and cropping pattern for suggesting optimum cropping pattern based on performance indicators and net benefit from the project. The data on daily meteorological data (1979-2013), satellite digital images, soil characteristics, daily reservoir gauge levels, canal network details, daily canal water release, year-wise cropping pattern in the command area and area under cultivation of various crops of Purna Irrigation Project were collected. Two SRTM images (SRTM_52_08 and SRTM_52_09) with 90 m x 90 m resolution were downloaded from NASA website to prepare DEM of the study area using ERDAS Imagine software. The geospatial input data namely, Digital elevation model (DEM), land use land cover (LULC) map and Soil textural map required to run SWAT were prepared in ArcGIS environment. Database on climate, soil, crop, drainage network, ground water, reservoir and management practices were prepared in MS ACCESS. The SWAT model was used to assess the water availability in Purna reservoir using DEM, weather data and hydrological details of catchment as well as canal command.

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