Priority Watershed Determination Methods for Comprehensive Control of Soil and Water Conservation in Three Gorges Reservoir Area

FU Suhua; ZHANG Zhilan; JIANG Guangyi; SHEN Zhuolan; ZHAO Hui; DING Lin

doi:10.13870/j.cnki.stbcxb.2020.03.013

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Priority Watershed Determination Methods for Comprehensive Control of Soil and Water Conservation in Three Gorges Reservoir Area

更新时间：2025-03-12

- Priority Watershed Determination Methods for Comprehensive Control of Soil and Water Conservation in Three Gorges Reservoir Area
- Vol. 34, Issue 3, Pages: 79-83(2020)
- 作者机构：
  
  1. 北京师范大学地理科学学部,北京,100875
  2. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌,712100
  3. 重庆市水土保持监测总站,重庆,401147
  4. 水利部水土保持监测中心,北京,100053
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.03.013
  CLC： S157.1
- Published：2020
- 稿件说明：
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FU Suhua, ZHANG Zhilan, JIANG Guangyi, et al. Priority Watershed Determination Methods for Comprehensive Control of Soil and Water Conservation in Three Gorges Reservoir Area[J]. 2020, 34(3): 79-83.
DOI：

FU Suhua, ZHANG Zhilan, JIANG Guangyi, et al. Priority Watershed Determination Methods for Comprehensive Control of Soil and Water Conservation in Three Gorges Reservoir Area[J]. 2020, 34(3): 79-83. DOI： 10.13870/j.cnki.stbcxb.2020.03.013.

摘要

三峡库区水土流失严重，开展水土流失综合治理是减少入库泥沙和提高三峡工程综合效益的关键，而如何高效识别优先小流域，则是提高治理资金效益和科学决策的基础。以重庆市合川区为例，在区域土壤侵蚀评价的基础上，提出了水土流失面积法、土地利用-水土流失面积法和坡度-水土流失面积法3种优先小流域识别方法，并对其进行了比较分析。结果表明，坡度-水土流失面积法识别的优先小流域水土流失面积占比接近于水土流失面积法，同时又将坡度较大以及耕地、园地和采矿用地面积占比较大的小流域识别出来，纳入优先小流域中，是3种方法中最优的识别方法。研究结果可为三峡库区或同类型地区小流域水土流失治理规划与实施顺序决策提供借鉴和参考。

Abstract

Serious soil erosion exists in the Three Gorges Reservoir area. The comprehensive control of soil and water conservation is the key measure for decreasing the sediment which flow into the Three Gorges Reservoir and improving the comprehensive benefit of the Three Gorges project.Effective identification of the small watershed (priority watershed) with serious soil erosion is the basis for improving the efficiency of fund utilization and scientific decision-making. In this study

Hechuan district in Chongqing was selected as a test area. The regional soil erosion was assessed. The priority watershed was then identified by soil loss area method

landuse-soil loss area method

and slope-soil loss area method. The parameters including the average soil loss area percentage

the percentage of different landuse and average slope degree were used to assess the priority watershed. The results showed that the average soil loss area percentage of priority watershed from slope-soil loss area method was close to those from soil loss area method. However

the priority watersheds with high slope gradient

greater area percentage of crop land

orchard land and mining land were also identified in the slope-soil loss area method. It indicates that the slope-soil loss area method was the best method for identifying priority watershed. The results could serve as the comprehensive soil and water conservation of small watersheds.

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Related Institution

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Key Laboratory of Ecological Environment in the Three Gorges Reservoir Area of Ministry of Education， School of Life Sciences， Southwest University

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