Abstract:

In order to understand and grasp the exploitation and utilization of water resources arid region, to determine the optimal allocation of water resources structure, as arid water resources reasonable use and water balance to provide decision-making basis. Through the establishment of ecological footprint model of water resources and water resources carrying capacity model, the author calculated the ecological footprint and the ecological carrying capacity of water resources in Dengkou County in the year of 2007 by means of the theory and method of ecological footprint.The results showed that ecological footprint in Dengkou County in 2007 was 3.8945 hm2/cap, the water resources ecological carrying capacity was 0.4130 hm2/cap and the water ecological footprint per capita was more than 9.42 times of the ecological carrying capacity per capita, and the ecological deficit of water resources was 3.4815 hm2/cap. Water consumption had far exceeded its capacity, the region was in extremely unsafe conditions. The main reason that caused the ecological deficit of water resources was agricultural water resources accounted for the largest ecological footprint, which indicated a structural contradiction in regional water supply. Some recommendations for the sustainable use of water resources, decreasing ecological footprint per capita and inereasing water resources carrying capacity in Dengkou County were put forward.