Water ecological function zoning in Heihe River Basin,Northwest China |
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| Institution: | 1. Chongqing Engineering Research Center for Remote Sensing Big Data Application, Research Base of Karst Eco-environments at Nanchuan in Chongqing, Ministry of Nature Resources, School of Geographical Sciences, Southwestern University, Chongqing 400715, China;2. State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Sciences, Beijing Normal University, Beijing 100875, China;3. U.S. Department of Agriculture, Agricultural Research Service, Hydrology and Remote Sensing Lab, Beltsville, MD 20705, USA;4. Research & Technology Food & Agriculture, IRTA, Parc Científic i Tecnològic Agroalimentari de Lleida, Parc de Gardeny - Edifici Fruitcentre, Lleida 25003, Spain;5. U.S. Department of Agriculture, Agricultural Research Service, U.S. Salinity Laboratory, 450 W. Big Springs Rd., Riverside, CA 92507, USA |
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| Abstract: | Rapid urbanization coupled with increase in population growth rate in recent years has accelerated economic pressure on the ecological environment leading to a gradual deterioration of global and regional environment. This has particularly resulted into water contamination and shortage of water resources thus posing a great threat to human survival. How to guaranteeing sustainable use of basin water resources has attracted more and more attentions. The Heihe River Basin is the secondary longest river inland China and the significantly water source of Hexi Corridor, the problem of water pollution, ecological environment deterioration and the shortage of water has seriously threatened the ecological system of the Heihe River Basin. In this study, through depicting the characteristics of natural environment, human activities, water ecosystem services and other factors in Heihe River Basin we delineated the water ecological function in Heihe River using the principal components analysis and the K-means clustering method. In the study, Heihe River Basin is divided into 3 primary level areas and 8 secondary level sub-areas. Water ecological characteristics analysis showed that the spatial distribution of the water ecological function of Heihe River Basin was not uniform, which are mainly showed in three aspects, function of windproof and sand fixation, function of soil erosion prevention and function of water sources conservation. The results of this study can provide effective and scientific theoretical references for the integrated water sources management and the ecological function optimization of the Heihe River Basin. |
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| Keywords: | Water ecological function Functional zoning Spatial clustering Heihe River Basin |
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