关键词: 水资源合理配置, 多目标模型, 生态服务价值

Abstract: In the social and economic development of the west of Inner Mongolia Region, there are a lot of urgent problems, such as deterioration in local ecological zones and inadequate utilization of water resources. The above embarrassment is also prevalent in some other arid regions of Northwest China. So in this paper an integrated macro-economy and ecology model is put forward based on local water resources utilization. This multi-objective macro-model consists of many development methods (scenarios) through linear optimization. The optimization model uses stocking rate of natural grasslands as “bridge factor” and designates “net green area” index (GREEN) as one of the four objectives used in the model, which includes the ecological information of grassland. The model describes mutual impressing procedure of ecology and economy in the pasturing area. Four impacts of the boundary parameters on the sustainable development of local area are studied. They are water saving extent, investment extent, stocking rate and water supply projects. Meanwhile, the financial intensity of the area itself is illustrated and that the rational allocation of water resources should be warranted by investment and stable water supply projects is pointed out. Whatever the financial investment out side the local area would be, the model approves that the current stocking rate should be steadily reduced and gives the most suitable reduction rate according to different methods raised in the model. Finally the grasslands’ ecological and environmental damage value of some methods is computed out by “natural grassland ecological service value (per unit)” and the model’s objective variant interface. These results, however, confirm the relevant methods in the model.

Key words: water resource rational allocation, multiple objective model, ecological service value