Integration of economic and hydrologic models: Exploring conjunctive irrigation water use strategies in the Volta Basin

We describe the development, calibration and preliminary application of a dynamically coupled economic–hydrologic simulation–optimization model ensemble for evaluating the conjunctive use of surface and groundwater in small reservoir-based irrigation systems characteristic of the Volta Basin, Africa...

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Bibliographic Details
Published in:Agricultural water management 2008-08, Vol.95 (8), p.925-936
Main Authors: Bharati, L., Rodgers, C., Erdenberger, T., Plotnikova, M., Shumilov, S., Vlek, P., Martin, N.
Format: Article
Language:English
Subjects:
Agricultural and forest climatology and meteorology. Irrigation. Drainage
Agronomy. Soil science and plant productions
basins
Biological and medical sciences
calibration
Decision support systems
Distributed hydrological modeling
econometric models
Freshwater
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
groundwater
hydrologic models
irrigation management
Irrigation optimization
irrigation systems
irrigation water
Irrigation. Drainage
optimization
reservoirs
simulation models
surface water
water allocation
watersheds
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Summary:We describe the development, calibration and preliminary application of a dynamically coupled economic–hydrologic simulation–optimization model ensemble for evaluating the conjunctive use of surface and groundwater in small reservoir-based irrigation systems characteristic of the Volta Basin, Africa. We focus on a representative small reservoir-irrigation system located in the Antakwidi catchment in Ghana. The model ensemble consists of the physical hydrology model WaSiM-ETH and an economic optimization model written in GAMS. Results include optimal water storage and allocation regimes for irrigated production, given conjunctive surface water and groundwater systems. The goal of our research, conducted within the GLOWA Volta project, is to develop a decision support system for improving the management of land and water resources in the face of potential environmental change in the Volta Basin.
ISSN:0378-3774
1873-2283
DOI:10.1016/j.agwat.2008.03.009