近20年来汾河流域降水侵蚀力时空变化特征  

The Spatiotemporal Variation Characteristics of Rainfall Erosivity in the Fen River Basin over the past 20 years

作　　者：蒋洁 Jang Jie(Shanxi Provincial Water Resources Development Center,Taiyuan,Shanxi 030002,China)

机构地区：[1]山西省水利发展中心,山西太原030002

出　　处：《山西水土保持科技》2025年第1期15-21,共7页Soil and Water Conservation Science and Technology in Shanxi

基　　金：山西省水利与科技推广项目(2024ZF03)。

摘　　要：探究降水侵蚀力时空分布变化特征,可为汾河流域水土流失综合治理提供理论依据。文章基于汾河流域及周边29个站点2000—2023年的逐日降雨数据,采用估算降水侵蚀力简易算法模型、Kriging空间插值等方法进行综合分析。研究结果如下:(1)在空间特征上,呈现为由流域西北向东南、东北递增趋势;(2)时间特征上,呈现夏季>秋季>春季>冬季的规律;(3)年内分配比例呈现明显的单峰型,主要集中在夏季与秋季,7月份降水侵蚀力达到最大值。在降水侵蚀力较大的区域,应采取增大植被覆盖度等一系列措施,缓解因降水侵蚀力增大造成的水土流失。To explore the spatiotemporal distribution and variation characteristics of rainfall erosivity,and provide a theoretical basis for soil erosion control in the Fenhe River Basin.Using daily rainfall data from 29 stations across the Fenhe River Basin from 2000 to 2023,we employed a modified daily rainfall erosivity algorithm combined with Kriging interpolation to quantify spatial-temporal dynamics.The results showed that:(1)Spatial characteristics displayed an increasing trend from the northwest to the southeast and northeast of the basin;(2)Temporal characteristics followed the pattern of summer>autumn>spring>winter;(3)The annual distribution proportion presents an obvious unimodal pattern,mainly concentrated in summer and autumn,and the maximum rainfall erosivity in July.These insights showed that comprehensive measures such as increasing vegetation coverage should be taken to alleviate soil erosion caused by the rainfall eros ivity increasing,especially in regions with relatively high rainfall erosivity.

关 键 词：降雨侵蚀力 时空特征 汾河流域 

分 类 号：S157[农业科学—土壤学]