基于ArcGIS的淤地坝土壤含水量空间变化分析

Spatial variation analysis of silt place dam soil moisture content with ArcGIS

目的探讨淤地坝坝地含水量的空间分布规律。方法根据对韭园沟三角坪坝地实地取样所测定的土壤含水量,结合GIS软件的DEM分析及统计功能,从不同深度含水量的水平变化情况、垂直变化情况及总平均含水量变化方面对坝地含水量的空间变化规律进行了系统的分析。结果通过分析得出各个不同深度含水量的水平变化特点和垂直变化特点。结论坝地含水量在靠近排洪渠的位置较高,由地表向下含水量不断增加,2 m以下含水量开始减少,2.4 m以下含水量开始表现出稳定趋势。

Aim In order to get the space distribution law of water content of dam ground. Methods According to the water content of soil got by taking samples to the dam ground of triangular level ground village, combining DEM analyzes and counts the function of GIS software, analysis was made on the law of the space changes of water content in the respects of changes of level and vertical. Results Through analyzing, the distribution characteristic of water content of changes of level and vertical was got. Conclusion The content of water is relatively high at the position closed to the canal. The content is increasing downward from the earth＇s surface,and it begins to reduce at the depth of 2 meter. And it remains stable under the depth of 2. 4 meter.