Water Resources Relating to Desertificationin the Hexi Area of Gansu Province, China
KANG Er-si~1, LI Xin~1, ZHANG Ji-shi~2, HU Xing-lin~3(1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu730000, China; 2. Lanzhou Jiaotong University, Lanzhou Gansu 730070, China; 2. Gansu Bureau of Hydrologyand Water Resources, Lanzhou Gansu 730000, China)
In the arid regions of Northwest China, water resources are distributed in various relatively independent inland river basins. They originate from mountain areas, are consumed and distributed in plains, artificial oases at the middle streams and natural oases at the down streams. In the basins of the three inland rivers in the Hexi Corridor of Gansu province, i.e., the Sule River Basin, the Heihe River Basin and the Shiyang River Basin, where water resources are very limited, exploitation and utilization of water resources are mainly concentrated in artificial oases with very vulnerable ecological environment. Over exploitation and utilization of water resources in the artificial oases at the middle streams cause a degradation of ecological environment, and then cause desertification of the natural oases at the down stream of the three inland river. Desertification of the Shiyang River Basin is the most serious among the three basins. The water resource problems related to desertification in the Shiyang River Basin is mainly analyzed and studied in this paper. Competition of exploitation and utilization of water resources among the upper, middle and down streams has enhanced the degradation of natural oases and desertification at the down streams. Therefore, it is necessary to carry out a comprehensive authorized management of basin water resources and rational utilization and allocation of water resources among the upper, middle and down streams and among different sectors and stakeholders. Emphasis of comprehensive management should be put on the water saving irrigation and construction of water saving society in the artificial oases at the middle streams. Sustainable economic and social development, protection of ecological environment, and desertification prevention should be simultaneously integrated.
【Fund】： 中国科学院寒区旱区环境与工程研究所知识创新工程项目(CACX2003102);; 中国科学院知识创新工程方向性项目(KZCX3 SW 329);; 亚洲银行支援项目(ADBTA366.-PRC);; 联合国环境规划署(UNDP)项目(AIACC AS25)资助
【CateGory Index】： TV213
【CateGory Index】： TV213