不同环境条件下的土壤侵蚀分析——以重庆市为例

为了探讨土壤侵蚀与温度、降雨量、植被指数、地形指数、水热指数和环境质量综合指数的关系,本文对重庆市不同环境条件下的土壤侵蚀进行了分析.在定义土壤侵蚀综合指数的基础上,将年平均温度、大于0°积温,大于10°积温,年降雨量,干燥度、湿润度,地形综合指数、植被指数、热量指数、水分指数,水热指数,和环境质量综合指数等分级数据统一成格网大小为100 m*100 m的栅格(grid)数据.然后,利用GIS的叠加统计分析功能,将这些数据与100 m*100 m格网大小的土壤侵蚀栅格(grid)数据进行叠加统计分析,从而揭示出了土壤侵蚀与这些环境因子之间的关系.

Analysis of the Soil Erosion under the Different Environment Condition for Instance in Chongqing City

In order to discover the relationship between the soil erosion status and its environment factors such as temperature, rainfall, vegetation index, topographic index, environment index, the analysis of the soil erosion under the different environment condition in Chongqing City is discussed here. Firstly, a soil erosion index is defined here to describe the heavy of soil erosion in per unit. Secondly, all of the environment data was rasterized into 100M*100M including topographic index, annual average temperature, accumulating temperatures above zero and ten degree, annual rainfall, aridity, humidity, hot index, water index, hot and water index, environment quality comprehensive index. Thirdly all of the environment data were used to overlay with the soil erosion data with grid size of 100 m*100 m. Finally, the statistics analysis function of the GIS is used to discover the relationship between the soil erosion and its environment factors.