Study on integrated benefit of water resources in arid and semi-arid irrigated district
干旱半干旱地域灌区水资源综合效益评价体系研究

The agricultural development in arid and semi-arid irrigated district depends on water resources,eco-environment and society factors.Research of water resources integrated benefit e-valuation in irrigated area is a core problem concerning development of water-saving agriculture,soil and water environment protection as well as coordinated economic and eco-environmental development.Now adays the evaluation models of water resources mostly use economic benefit maximum as optimized objection function,regardless of social benefit and eco-environmental benefit.Especially research of water resources synthetical benefit in irrigated district is inade-quate.Based on the conception of water resources sustainable development,it is pointed out that water resources optimized allocation should consider economic benefit,eco-environmental benefit and social benefit.Applying analytic hierarchy process(AHP),this paper established the mathe-matical model for integrated benefit evaluation of wa ter resources in irrigated district.The evalu-ation index system is proposed based on characteris tics of water resources development.The eval-uation index system includes3aspects:economic benefit,social benefit and eco-environmental benefit.These indices systematically reflect features in arid and semi -arid irrigated district.Be-cause of the complex relation of indices factors,synthetical benefit evaluation includes quantita-tive and qualitative aspects.The model and indicators made up are applied to evaluate syntheti-cally the status of water resources utilization in Baojixia Irrigated Dis trict in Shaanxi Province.The assessment model played an important role for the evaluation and management of water re-sources and water-saving program in the irrigated district.