红壤坡地降雨侵蚀力R因子算法比较分析  

Comparative Analysis of Rainfall Erosivity Factor R Algorithms on Red Soil Slope Land

作　　者：赖桂林 谢颂华 廖凯涛 宋月君 莫明浩 LAI Guilin;XIE Songhua;LIAO Kaitao(College of Land Resources and Environment,Jiangxi Agricultural University,Nanchang,Jiangxi 330045,China;Jiangxi Academy of Hydraulic Sciences,Nanchang,Jiangxi 330029,China)

机构地区：[1]江西农业大学国土资源与环境学院,江西南昌330045 [2]江西省水利科学院,江西南昌330029

出　　处：《中国水土保持》2022年第4期29-32,I0001,共5页Soil and Water Conservation in China

基　　金：江西省水利科技项目(201922ZDKT08);国家自然科学基金项目(42067020,41907611);江西省水利科技项目(202022YBKT20)。

摘　　要：降雨侵蚀力(R)是测算土壤侵蚀的重要因子,该因子的准确计算对水土流失动态监测具有重要意义。将经典算法作为基准值,通过对比章文波模型与经典算法的有效系数,分析当前江西省水土流失动态监测中R因子计算方法的适用性。研究得出:红壤坡耕地的侵蚀性降雨量标准为14.6 mm;章文波模型的α、β参数由公式算取比用冷、暖季取值再计算降雨侵蚀力更为准确。结论可为R因子的修正提供参考。Rainfall erosivity(R)is an essential factor to measure soil erosion and its accurate calculation is of great significance to the dynamic monitoring of soil erosion.Taking the classical algorithm as a reference value and through comparing the effective coefficient of rainfall erosivity between ZHANG Wenbo’s Model and the classical algorithm,the paper analyzed the applicability of factor R calculation method in the current dynamic monitoring of soil and water loss in Jiangxi Province.The outcomes show that the erosive rainfall standard of red soil slope farmland is 14.6 mm.It is more accurate to calculate the rainfall erosivity by parameters(αandβ)of ZHANG Wenbo’s model formulas than to calculate by taking values in cold and warm seasons.The conclusion can provide reference for the correction of factor R.

关 键 词：降雨 降雨侵蚀力 侵蚀性降雨标准 红壤坡地 

分 类 号：S157[农业科学—土壤学]