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| Ecological risk analysis and evaluation of water resources system:A case study of Xiangride oasis |
| Han Xiaozhuo1, Li Zizhen1,4 , Zhang Kebin2, Li Runjie3, Hui Cang1, Gao Meng4 |
1.Key Laboratory of Arid Agro-ecology, Ministry of Education, Lanzhou University, 730000, Lanzhou; 2.College of Soil and Water Conservation,
Beijing Forestry University, 100083, Beijing; 3.Institute of Hydrology and Electric Power of Qinghai Province, 810001, Xining; 4.Department of Mathematics & Statistics, Lanzhou University, 730000, Lanzhou: China |
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Abstract Ecological risk analysis and its evaluation of water resources is a key problem of sustainable utilization of water resources, while that in oasis region of endorheic drainage is a hotspot. Taking water resources systems of Xiangride oasis in Qinghai as a research object, two models are established which reveal risk evaluation resulted from runoff amount uncertainty of water resources. The uncertainty of water resources and its influence on principal industries in oasis region are quantitatively analyzed. The results indicate that risk index because of runoff amount uncertainty of water resources is 0.362, that of protection forest net integrality is 0.289, and that of agricultural structure affected by water resources and protection forest synthetically is 0.294, whole ecological risk of water resources system is 0.2925.
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Received: 07 June 2004
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