An integrated model for optimal reservoir operation for irrigation of multiple crops

Vedula, S and Kumar, Nagesh D (1996) An integrated model for optimal reservoir operation for irrigation of multiple crops. In: Water Resources Research, 32 (4). pp. 1101-1108.

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Abstract

An integrated model is developed, based on seasonal inputs of reservoir inflow and rainfall in the irrigated area, to determine the optimal reservoir release policies and irrigation allocations to multiple crops. The model is conceptually made up of two modules, Module 1 is an intraseasonal allocation model to maximize the sum of relative yields of all crops, for a given state of the system, using linear programming (LP). The module takes into account reservoir storage continuity, soil moisture balance, and crop root growth with time. Module 2 is a seasonal allocation model to derive the steady state reservoir operating policy using stochastic dynamic programming (SDP). Reservoir storage, seasonal inflow, and seasonal rainfall are the state variables in the SDP. The objective in SDP is to maximize the expected sum of relative yields of all crops in a year. The results of module 1 and the transition probabilities of seasonal inflow and rainfall form the input for module 2. The use of seasonal inputs coupled with the LP-SDP solution strategy in the present formulation facilitates in relaxing the limitations of an earlier study, while affecting additional improvements. The model is applied to an existing reservoir in Karnataka State, India.

Item Type:	Journal Article
Publication:	Water Resources Research
Publisher:	American geophysical union
Additional Information:	Copyright of this article belongs to American Geophysical Union.
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	10 May 2011 08:06
Last Modified:	10 May 2011 08:07
URI:	http://eprints.iisc.ac.in/id/eprint/37018

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