Study on Conjunctive Use of Water Resources in Hetao Irrigation District of Inner Mongolia based on GAMS Simulation and Optimization
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Abstract:
According to the national and local allocation proportions of water resources in the Yellow River, the irrigation water amount drawn from the Yellow River will be limited to less than 4.0 × 109 m3 per year in the future for the Hetao Irrigation District while the current irrigation water amount is about 5.2 × 109 m3 per year. With the decreasing of the irrigation water amount and rapid economic development, the conflict between the supply and demand of water resources can be more serious, therefore the reasonable utilization of the limited water resources is the primary task faced by the local authority in the Hetao Irrigation District. Based on the analysis of current supply and demand balance of water resources and the long-term plans and water resources utilization in the irrigation district, two schemes of conjunctive use of irrigation water from the Yellow River and groundwater are developed. Moreover, the optimization analysis is conducted on the conjunctive use of water resources in the planning year and the dynamic variations of groundwater under different schemes are simulated. The results show that the irrigation water of 4.0 × 109 m3 per year can maintain the sustainable development of the irrigation district under the conditions of optimizing the industrial structure, enlarging the combined well-canal irrigation areas, and using the groundwater resources including brackish water effectively.
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