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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。
Regular publicity of soil and water conservation monitoring is one of the main provisions of laws and regulations such as soil and water conservation laws, but how to use the observation data of the monitoring sites to calculate the amount of soil erosion and the benefits of soil and water conservation more scientifically and accurately is the main existing in soil and water conservation announcement One of the problems. Taking Beijing Municipality as an example, the amount of soil erosion in Beijing was calculated based on the G IS platform and the model of rainfall erosivity using the rainfall and soil erosion amount observed by the monitoring sites of the soil and water conservation network in Beijing. The result shows that the calculation result is reliable and the method is feasible. It can provide a reference for the calculation of soil erosion amount in other areas.