Study on Ecological Water Demand in Hongqinghe Coal Mining Area of Ordos
The Ordos Hongqinghe Coal Mine Area is situated in the western arid and semi-arid inland region.Ecological challenges are notably pronounced here due to coal mining activities.The scarcity of water resources and the imbalance between supply and demand have significantly impeded efforts towards ecological restoration in the area.The ecological water demand of the Hongqinghe Coal Mine Area is categorized into two types:natural ecological water demand and artificial ecological water demand,based on thorough natural investigations.The vegetation ecological water demand was determined using the vegetation evapotranspiration method,qualitatively predicted through Markov chain analysis,and quantitatively forecasted utilizing the gray prediction model GM(1,1).The results indicated that,using 2020 as the base year,the total ecological water demand of the Hongqinghe Coal Mine Area is 37.52×107 m3.The ecological water demand per square kilometer for natural vegetation,inclu-ding trees,shrubs and grasslands,is 1.11×106、1.06×106 and 0.36×106 m3,respectively.Additionally,the man-made ecologi-cal water demand is 1.39×107 m3.Further ecological water demand of the study area is qualitative and quantitative predic-tions,the natural ecological water demand of the mining area in the planning years(2025,2030 and 2035)increased by 0.61％,2.57％and 4.57％,respectively,compared with the base year.Additionally,the artificial ecological water demand in-creased by 3.60％,11.51％and 20.86％respectively.The results of the study offer a scientific foundation for selecting vegeta-tion types,developing and utilizing water resources,and making rational allocations of water resources for the ecological restora-tion of the area.
ecological water demandgray prediction modelMarkov chainquantitative predictio
万方数据
维普
