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Accueil du site → Doctorat → Inde → 2016 → Optimal Crop Planning through Optimization and Simulation of Surface and Groundwater Resources in Left Bank Canal Command Area of Khadakwasla Dam Maharashtra

Banaras Hindu University (2016)

Optimal Crop Planning through Optimization and Simulation of Surface and Groundwater Resources in Left Bank Canal Command Area of Khadakwasla Dam Maharashtra

Lohani, A.K

Titre : Optimal Crop Planning through Optimization and Simulation of Surface and Groundwater Resources in Left Bank Canal Command Area of Khadakwasla Dam Maharashtra

Auteur : Lohani, A.K

Université de soutenance : Banaras Hindu University

Grade : Doctor of Philosophy (PhD) 2016

Résumé partiel
The concept of crop planning through conjunctive use of water resources entails for effective utilization of surface and groundwater for a judicious planning and policy implementation. The shortages of surface water supplies necessitated the development of groundwater in many canal commands. A study on conjunctive use of surface and groundwater resources is adopted by farmers in the left bank canal command of Khadakwasla dam in upper Bhima basin, Maharashtra. The storage of secondary reservoir in the canal command for fulfilling the maximum possible net irrigation demand of the crops based on the dry year analysis of rainfall was studied for the existing sub basins in the command area.

The annual rainfall for the period 1975-2002 at probability levels of 50 percent (P50) and 80 percent (P80) was calculated for all stations by Weibull’s method. The annual rainfall at probability level of 50% i.e. P50 is termed as average annual rainfall and rainfall equivalent to 80% probability is termed as ‘dry year’ rainfall. An estimate of the respective rainfall data can be obtained by computing and plotting probabilities from the rainfall records to determine dry, normal and wet year values (Abdalla et al., 2010). The average monthly reference evapotranspiration has been computed with the help of CROPWAT 8.0 software developed by FAO (Food and Agriculture Organization) using the climatic data of Bhigwan raingauge station falling in the present study area. The dry year net irrigation requirements of various crops viz., Sorghum and Wheat, Pearl millet, Groundnut, Green manure, Chili, Cotton and Groundnut (summer) and Sugarcane has been calculated on monthly basis. Average monthly canal release data of each outlet for the period of 37 years (1972-2009) has been used for calculating water availability at the field in different sub basins.

The performance indices viz. Adequacy (PIA), Equity (PIE), Dependability (PID), cropping intensity and irrigation intensity were calculated based on water requirements of crops grown in the command area and the volume of water delivered to different crops in the basin.

Linear programming based Quantitative System for Business (QSB) model has been used and the optimization problem was solved through computer software package (WinQSB) (Chang, 2003). Each of the six sub basins were subjected to multiple objective programming (MOP) for optimization under two constraints. The optimization problem was solved for two objective functions : Objective-Imaximization of production and Objective- II- maximization of net return. Each of the two objective functions were optimized under three different Irrigation water supply scenarios : canal water only (CW)], canal and secondary reservoir water [CW+ SR], surface water and groundwater [CW+SR+Groundwater (GW)].

Présentation et version intégrale (Shodhganga)

Page publiée le 5 février 2021