Scholarlink

<p>The physiographic soil erosion–deposition (PSED) Model was used to simulate and measure soil erosion dynamics in the Gaoping River Basin, analysing 215 rainfall events from 1996 to 2020. Soil erosion potential and risk maps were generated, illustrating a positive correlation between soil erosion amounts and cumulative rainfall. Notably, when accumulated rainfall exceeds 1000&#xa0;mm, there is a significant increase in severe and extremely severe erosion, with average soil erosion rates markedly higher than at lower rainfall levels. Our results indicate that on slopes &gt; 35°, areas experiencing severe and extremely severe erosion increase with rainfall. Specifically, the ratios of extremely severe and severely eroded areas to slopes exceeding 35° for accumulated rainfall over 1000&#xa0;mm are 15.97% and 8.41%, respectively. Locations prone to landslides are particularly vulnerable to severe and extremely severe erosion, with the extent of such erosion intensifying as rainfall increases. Conversely, for rainfall events with accumulated totals below 500&#xa0;mm, occurrences of severe or extremely severe erosion at high-risk levels barely exist. However, when cumulative rainfall exceeds 500&#xa0;mm, there is a significant development of high-risk and extremely high-risk erosion zones, with erosion severity increasing alongside increased rainfall amounts. The erosion potential and risk maps developed in this study provide critical insights for identifying high-risk areas within the watershed, which are essential for effective watershed management strategies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Mapping soil erosion potential and risk for slope land in a watershed

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月12日

查看全文
  • Ching-Nuo Chen

摘要

The physiographic soil erosion–deposition (PSED) Model was used to simulate and measure soil erosion dynamics in the Gaoping River Basin, analysing 215 rainfall events from 1996 to 2020. Soil erosion potential and risk maps were generated, illustrating a positive correlation between soil erosion amounts and cumulative rainfall. Notably, when accumulated rainfall exceeds 1000 mm, there is a significant increase in severe and extremely severe erosion, with average soil erosion rates markedly higher than at lower rainfall levels. Our results indicate that on slopes > 35°, areas experiencing severe and extremely severe erosion increase with rainfall. Specifically, the ratios of extremely severe and severely eroded areas to slopes exceeding 35° for accumulated rainfall over 1000 mm are 15.97% and 8.41%, respectively. Locations prone to landslides are particularly vulnerable to severe and extremely severe erosion, with the extent of such erosion intensifying as rainfall increases. Conversely, for rainfall events with accumulated totals below 500 mm, occurrences of severe or extremely severe erosion at high-risk levels barely exist. However, when cumulative rainfall exceeds 500 mm, there is a significant development of high-risk and extremely high-risk erosion zones, with erosion severity increasing alongside increased rainfall amounts. The erosion potential and risk maps developed in this study provide critical insights for identifying high-risk areas within the watershed, which are essential for effective watershed management strategies.