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| Analysis on evolution of carrying state of water and soil resources in artificial oases in arid areas |
| XU Cundong1,2,3, HU Xiaomeng1,3*, LIU Zijin1,3, WANG Xin1,3, REN Zihao1,3, ZI Yahui1,3 |
| 1. School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450046, China; 2. Key Laboratory for Technology in Rural Water Management of Zhejiang Province, Hangzhou, Zhejiang 310018, China; 3. Henan Provincial Hydraulic Structure Safety Engineering Research Center, Zhengzhou, Henan 450046, China |
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Abstract In order to clarify the evolution process of the water and soil resources bearing status of the artificial oasis in arid area in time series. Taking Jingdian Irrigation Area in Gansu Province as an example, the multi-level fuzzy classification theory was introduced to establish a comprehensive evaluation index system of the water and soil resources bearing status. Based on entropy weight method and matter element analysis theory, a matter element analysis model is built, and a comprehensive evaluation cloud model is built by integrating the golden ratio method, combination weighting method and cloud theory to comprehensive evaluation of water and soil resources bearing capacity of the irrigation area in 1994, 2002, 2010 and 2018. The results show that the water and soil coordination degree and groundwater mineralization degree are the dominant factors for the change of water and soil resources bearing capacity in the irrigation area. The bearing capacity of water and soil resources in the study area is between ″slight bearing and good bearing″ state in all periods, and showing a benign evolution trend as a whole. The entropy(En)and super entropy(He)values of the comprehensive eva-luation cloud of water and soil resources bearing capacity are 0.027 1, 0.026 3, 0.024 4, 0.026 7 and 0.006 7, 0.007 8, 0.006 5, 0.005 7, respectively, which are small values and He/En is less than 1/3, indicating that the assessment results are consistent with the actual water and soil resources bearing state.
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Received: 18 July 2022
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