基于水力侵蚀影响因子评价济南市南部山区生态敏感性

Ecological Sensitivity in Southern Mountain Region of Jinan City Evaluated on the Basis of Influencing Factors of Hydraulic Erosion

基于水力侵蚀影响因子,以济南市南部山区为研究区,选取高程、坡度、土壤可蚀性因子、植被覆盖度和土地利用类型5个因子,构建研究区生态敏感性评价指标体系,采用层次分析法进行研究区生态敏感性评价,并提出相应措施以改善研究区的生态问题。结果表明:研究区综合敏感性等级中不敏感、轻度敏感、中度敏感、重度敏感和极度敏感区面积占总面积的比例分别为3.14%、20.05%、42.97%、30.71%和3.13%,中度敏感、重度敏感区集中在研究区的中部,东、西部生态敏感性降低,原因是中部山高坡陡,海拔及坡度较大,主要以灌木林地和有林地为主,而东部、西部坡度较缓,主要以耕地为主。

Taking the southern mountain region of Jinan city as the study region,on the basis of influencing factors of hydraulic erosion,five factors of elevation,slope,soil erodibility factor,vegetation coverage,and land use type were selected to construct an ecological sensitivity evaluation index system of the study region.Analytic hierarchy process was used to evaluate the ecological sensitivity of the study region,and corresponding measures were put forward to improve ecological problems in the study region.The results show that the proportion of insensitive,mildly sensitive,moderately s ensitive,severely sensitive,and extremely sensitive region areas to the total area of the study region is 3.14%,20.05%,42.97%,30.71%and 3.13%,respectively.The moderately sensitive and severely sensitive regions were concentrated in the middle of the study region,and the ecological sensitivity decreases in the east and west of the study region.The reason is that the central mountain has high and steep slope,large elevation and slope,and mainly dominated by shrub land and forest land,while the eastern and western mountains have gentle slope and mainly dominated by arable land.