Response of Soil Erosion to Land Use Change in Dangjiangkou Reservoir Area

ZHANG Ying; LIAO Chang; JIANG Qinghu; LIU Feng

doi:10.13961/j.cnki.stbctb.2017.01.019

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Response of Soil Erosion to Land Use Change in Dangjiangkou Reservoir Area

- Response of Soil Erosion to Land Use Change in Dangjiangkou Reservoir Area
- Bulletin of Soiland Water Conservation Vol. 37, Issue 1, Pages: 104-111(2017)
- 作者机构：
  
  1. 中国科学院武汉植物园水生植物与流域生态重点实验室,湖北,武汉,430074
  2. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.01.019
  CLC：
- Published：2017
- 稿件说明：
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ZHANG Ying, LIAO Chang, JIANG Qinghu, et al. Response of Soil Erosion to Land Use Change in Dangjiangkou Reservoir Area[J]. Bulletin of Soiland Water Conservation, 2017, 37(1): 104-111.
DOI：

ZHANG Ying, LIAO Chang, JIANG Qinghu, et al. Response of Soil Erosion to Land Use Change in Dangjiangkou Reservoir Area[J]. Bulletin of Soiland Water Conservation, 2017, 37(1): 104-111. DOI： 10.13961/j.cnki.stbctb.2017.01.019.

摘要

[目的] 探讨土壤侵蚀对土地利用变化的响应，为库区土壤侵蚀的防治提供借鉴性意见，从而为制定保障丹江口水质安全的措施提供科学支持。[方法] 利用遥感影像解译的土地利用类型（2002—2013年），分析丹江口库区土地利用变化，同时利用修正的土壤流失模型RUSLE对土壤侵蚀量进行模拟分析，探讨土壤侵蚀对土地利用变化的响应。[结果] 丹江口库区在2002—2013年期间主要的土地利用变化集中在林地、耕地、灌草地之间的转移以及建设用地的扩张，具体表现为林地面积扩大了13.72%，耕地面积小幅增加了5.76%，而灌草地面积大幅减少了37.61%，建设用地增长了2.40倍。丹江口库区2002，2008，2013年均以微度侵蚀占主导。库区土壤的整体侵蚀强度减轻，但土壤侵蚀在城市扩张地区增加明显。[结论] 丹江口库区的土地利用变化及土壤侵蚀强度的改变主要受退耕还林、天然林保护等政策措施和城市扩张的影响。库区的土壤侵蚀程度在总体上具有降低的趋势，但在城镇化区域，土壤侵蚀状况急剧恶化。

Abstract

[Objective] The purpose of this study is to explore the response of soil erosion to land use changes

and to provide reference for the prevention and control of soil erosion in the reservoir area

as well as to provide scientific support for the development of measures to ensure water quality security in Danjiangkou reservoir area. [Methods] Using land use data interpreted from remote sensing images

we analyzed the land use changes in the Danjiangkou reservoir area between 2002 and 2013. Additionally

using the revised universal soil loss equation(RUSLE)

we simulated soil erosion to evaluate how it may response to land use change. [Results] During 2002—2013

the main land use changes resulted from conversions among forest

farmland and shrub-grassland

as well as expansion of construction area. Specifically

forest area expanded by 13.72%

the area of farmland only increased by 5.76%. Shrub-grass land area has decreased by 37.61%. The construction area increased twice. In 2002

2008 and 2013

slight soil erosion dominated the most areas in the Danjiangkou reservoir area. In spite of the increased soil erosion intensity in construction area

the overall soil erosion intensity was reduced. [Conclusion] Implementation of grain-for-green policy

closing hillsides to facilitate afforestation

and urbanization contributed to land use and soil erosion change in the Danjiangkou reservoir area. The soil erosion in the reservoir area has a tendency to decrease in general

but in the area of urbanization

soil erosion has deteriorated sharply.

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references

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