基于RS/GIS技术的南四湖流域典型市域生态敏感性评价——以济宁市为例

Regional Eco-sensitivity Analysis of Nansi Lake Watershed Based on RS/GIS with Special Reference to Jining City

基于RS和GIS技术,利用多源数据,从土壤侵蚀、土壤盐渍化、景观以及采矿塌陷4个方面对研究区的生态敏感性进行了评价,研究了空间分布差异及规律。结果表明:土壤侵蚀敏感性以轻度和中度为主,由东北和西南向中心递减趋势;土壤盐渍化除西部平原区盐渍化高风险突出外,敏感性普遍较低,由西向东递减;景观稳定性主要表现为轻度敏感,由四周向中心递减;采矿塌陷敏感性指标由于受人类活动影响呈现极端分布,高敏感区主要分布在研究区中部地区;研究综合生态敏感性分布空间差异显著,以不敏感区为主,整体上呈由西向东递减的趋势。

In this paper, on the basis of RS/GIS and multiple data, eco-sensitivity of the studied region was evaluated from the aspects of soil erosion, soil salinization, landscape stability and mining subsidence, and spatial distribution differences and rules were studied. The results showed that the sensitivity of soil erosion was mainly in mild and moderate states, showing a decreasing trend of spatial distribution from northeast and southwest to the center. Except for the remarkable high risks of the salinization of the western plain, the sensitivity of soil salinization was insignificant, decreasing from west to east in general. The sensitivity of landscape stability was slight, descending from the surrounding to the center. The sensitivity of mining subsidence presented extreme distribution due to the impacts of human activities, with high sensitivity area in the central of the studied region. Spatial distribution of the integrated eco-environment sensitivity differed significantly with insensitivity area as the maioritv and presented an overall decreasing trend from west to east.