Research on Ecological Risk Assessment of Water Resources in Hilly Areas: A Case Study of Ya'an
Special Issues Editor (Nottingham Tent University, United Kingdom (Great Britain))
To address the problem of ecological risk of water resources in hilly areas, this paper establishes an evaluation index system for ecological risk of water resources in hilly areas on the basis of State-Pressure-Response model. Ecological risks of water resources in different districts and counties in Ya'an are calculated through collection, statistical analysis and expert evaluation of basic data of impact factors with Analytic Hierarchy Process and Fuzzy Comprehensive Judgment. Results are analysed through contrast analysis and cluster analysis, and then the level of risk is determined. Based on GIS platform, the thematic map of ecological risk level of water resources in Ya'an is drawn, which can help analyse the sources of ecological risk of water resources. Results show that the ecological risk level of water resources in Baoxing county is level I, which is alight risk; the risk level in Hanyuan County, Lushan County and Yingjing County is level II, which is a mild risk; the risk level in Shimian County, Tianquan County, and Mingshan County is level III, which is a moderate risk. And the risk level in Yuchengg district is level V, which is a severe risk. Ecological risk of water resources is closely related to population growth, human activities, industrial and agricultural production. The major risk sources include flood and drought, unbalanced temporal and spatial distribution of precipitation, development and construction of cascade hydropower stations, traditional farming and breeding, population growth, industrial pollution and so on.
Journal: International Journal of Simulation: Systems, Science & Technology, IJSSST V17
Published: Jul 14, 2016