肇庆市水土流失关键因子提取——以降雨侵蚀力R为例

The Key Factor of Soil and Water Loss in Zhaoqing Was Extracted As A Result of Rainfall Erosivity R

降雨是区域水土流失的动力源,研究降雨侵蚀力空间分布规律,对有针对性开展水土保持具有重要意义。基于肇庆市2000-2010年8个气象站点逐月降水资料,计算站点降雨侵蚀力,并运用Anusplin插值法对降雨侵蚀力进行空间化。结果表明,肇庆市降雨侵蚀力介于4446.92~5782.56 MJ·mm/(hm 2·h)之间,空间平均值为5032.58 MJ·mm/(hm 2·h),并表现出自东向西减小、自西南向东北增加格局。研究成果提供了降雨侵蚀力及其空间化的详细技术方案,以期为区域水土流失模量精确估算提供参考依据。

Rainfall is the power source of regional soil and water loss.It is important to study the spatial distribution of rainfall erosivity for soil and water conservation.Based on the monthly rainfall data of eight meteorological stations in Zhaoqing from 2000 to 2010,the rainfall erosivity was calculated and spatialized using the Anusplin interpolation method.The results show that the rainfall erosivity in Zhaoqing ranges from 4446.92 to 5782.56 MJ·mm/(hm 2·h),and the spatial average is 5032.58 MJ·mm/(hm 2·h),and it decreases from east to west and increases from southwest to northeast.This study provides a detailed technical scheme of rainfall erosivity and its spatialization,which can provide a reference for the accurate estimation of regional soil and water loss modulus.