盐城市斗南垦区降雨侵蚀力规律分析

Analysis of Rainfall Erosivity Patterns in Dounan Reclamation Area of Yancheng City

盐城地区为冲积平原,土壤易受降水冲刷影响发生水土流失,本文基于盐城市斗南垦区12个雨量站2012—2022年逐日降水量数据,运用日降雨侵蚀力模型计算该区域降雨侵蚀力,并分析其时空分布规律。结果表明,区域降雨侵蚀力在年内呈现季节性变化;在年际间呈现总体减少的趋势,但不是单一减少,而是两段式变化;在空间分布上表现为西北部低、东南部高。建议盐城市斗南垦区6—8月应重视水土流失预防监督,东南部应重点做好水土保持措施。

Yancheng City area is an alluvial plain,where soil is vulnerable to erosion due to precipitation,leading to soil erosion.Based on daily precipitation data from 12 precipitation stations in Dounan Reclamation Area of Yancheng City from 2012 to 2022,this paper utilizes a daily rainfall erosivity model to calculate the rainfall erosivity in this region and analyze its spatial-temporal distribution patterns.The results indicate that the rainfall erosivity exhibits seasonal variations throughout the year and generally decreases annually,but not in a linear manner;rather,it shows a two-phase change.Spatially,the rainfall erosivity is lower in the northwest and higher in the southeast.It is recommended to focus on soil erosion prevention and supervision from June to August in Dounan Reclamation Area of Yancheng City,particularly in the southeastern part,where soil conservation measures should be prioritized.