基于GIS的北京市土壤侵蚀量计算

Calculation on soil erosion in Beijing City based on GIS

定期公告水土保持监测情况是水土保持法等法律法规的主要规定之一,但如何利用监测站点的观测数据较为科学准确地推算区域土壤流失量及水土保持效益,是目前水土保持公告中存在的主要问题之一。以北京市为例,利用全市水土保持监测网络站点观测到的降雨量及水土流失量等资料,基于G IS平台和降雨侵蚀力模型,对2009年北京市土壤流失量进行定量计算。结果表明,计算结果可靠,方法可行,可为其他地区计算土壤侵蚀量提供参考。

Periodically bulletin on soil conservation and monitoring is one major regulation demand for the soil and water conservation law.However,one of the main problems in this bulletin is how to calculate the soil erosion and soil conservation benefits by using the data from the monitoring sites.In this paper,taking Beijing City as the object,with the data of the rainfall and soil erosion from the Beijing soil and water conservation monitoring network,the amount of soil erosion in Beijing City was calculated in 2009 using the GIS and rainfall erosivity model.It can be concluded that the result and methods are feasible,and could be the reference of soil erosion calculation for other regions.