| 丹江口库区2010-2020年土壤保持功能时空特征及其影响因素 |
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| 引用本文： | 廖雯,胡砚霞,于兴修,刘璇璇.丹江口库区2010-2020年土壤保持功能时空特征及其影响因素[J].水土保持通报,2021,41(6):288-294. |
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| 作者姓名： | 廖雯 胡砚霞 于兴修 刘璇璇 |
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| 作者单位： | 湖北大学 区域开发与环境响应湖北省重点实验室, 湖北 武汉 430062;湖北大学 区域开发与环境响应湖北省重点实验室, 湖北 武汉 430062;湖北省农业遥感应用工程技术研究中心, 湖北 武汉 430062 |
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| 基金项目： | 国家自然科学基金项目“垄作覆膜对土壤无机氮流失过程的影响机理”（41471227）；湖北省自然科学基金项目（2016CFB201）；区域开发与环境响应湖北省重点实验室开放基金项目（2018（C）002） |
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| 摘 要： | 目的] 评估丹江口流域土壤保持功能时空变化及其影响因素，为南水北调中线工程水源地水土流失治理模式的确立以及流域水土保持与生态系统安全管理提供科学依据。方法] 采用InVEST模型和地理探测器方法分别对丹江口库区2010，2015和2020年土壤保持功能时空变化特征及其影响因素进行定量分析。结果] ①丹江口库区2010—2020年实际土壤侵蚀量呈递减趋势，土壤侵蚀等级逐渐向微度侵蚀转变，且各年间空间分布趋势基本一致。②丹江口库区2010，2015和2020年土壤保持量分别为6.25×109 t，6.62×109 t和7.12×109 t，呈逐步上升的趋势，表明库区土壤保持功能不断增强。③不同海拔范围土壤保持功能具有差异，较高海拔地区土壤保持量较高（如东北部伏牛山、西部秦岭、西南部武当山），低海拔区土壤保持量较低（如丹江口水库周边地区）。不同土地利用类型土壤保持能力亦差异较大，以林地最高，其次为灌草地、园地和耕地。④地理探测器分析结果显示，丹江口库区土壤保持功能变化主要受地形因子的影响。结论] 近年来丹江口库区土壤保持功能总体趋势持续好转，部分区域土壤保持量仍较低，未来应继续推进退耕还林（草）工程建设，重视和保护土壤保持能力较强的林地和灌草地，从而增强库区土壤保持功能。
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| 关 键 词： | InVEST模型 丹江口库区 土壤保持功能 影响因素 地理探测器 |
| 收稿时间： | 2021/5/26 0:00:00 |
| 修稿时间： | 2021/8/8 0:00:00 |
Spatiotemporal Variation and Influence Factors of Soil Conservation Function in Danjiangkou Reservoir Area During 2010-2020 |
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| Liao Wen,Hu Yanxi,Yu Xingxiu,Liu Xuanxuan.Spatiotemporal Variation and Influence Factors of Soil Conservation Function in Danjiangkou Reservoir Area During 2010-2020[J].Bulletin of Soil and Water Conservation,2021,41(6):288-294. |
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| Authors: | Liao Wen Hu Yanxi Yu Xingxiu Liu Xuanxuan |
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| Institution: | Hubei Key Laboratory of Regional Development and Environmental Response, Hubei University, Wuhan, Hubei 430062, China;Hubei Key Laboratory of Regional Development and Environmental Response, Hubei University, Wuhan, Hubei 430062, China;Hubei Provincial Research Centre for Application of Agricultural Remote Sensing Engineering Technology, Wuhan, Hubei 430062, China |
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| Abstract: | Objective] The spatial and temporal characteristics of soil conservation function and its influencing factors in Danjiangkou Reservoir area were scientifically evaluated, in order to provide a scientific basis for the establishment of soil erosion control models in the water source area of the middle route of the south-to-north water transfer project and the soil and water conservation and ecosystem safety management in the basin.Methods] The InVEST model and the geographical detector method were used to quantitatively analyze the temporal and spatial characteristics of soil conservation function and its influencing factors in Danjiangkou Reservoir area in 2010, 2015 and 2020.Results] Firstly, from 2010 to 2020, both of the actual amount of soil erosion and the soil erosion grade in the Danjiangkou Reservoir area decreased, and the spatial distribution trend in each year was basically consistent. Secondly, the conserved soil in Danjiangkou Reservoir area in 2010, 2015 and 2020 was 6.25×109 t, 6.62×109 t and 7.12×109 t, respectively, which showed a gradual upward trend, indicating that the soil conservation function of the Danjiangkou Reservoir area has been continuously enhanced. Thirdly, the soil conservation function was varied in different altitude ranges. The quantity of soil conservation was larger in higher altitude areas, such as Funiu Mountains in the northeast, Qinling Mountains in the west, and Wudang Mountains in the southwest. The quantity of soil conservation was smaller in lower-altitude areas, such as the area around the Danjiangkou Reservoir. The quantity of soil conservation of different land-use types was also quite different, with wood land being the largest, followed by shrub rangeland, garden land and cultivated land. Last, the geographical detector analysis results showed that the changes in soil conservation function in the Danjiangkou Reservoir area were mainly affected by topographic factors.Conclusion] In recent years, the soil conservation function in the Danjiangkou Reservoir area has been changed in a positive trend in general, although the quantity of soil conservation in some areas is still small. In the future, the returning farmland to forest land (or grassland) should continue to be promoted, and forest land and shrubland with strong soil conservation capabilities should be focused and protected so as to enhance the soil conservation function of Danjiangkou Reservoir area. |
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| Keywords: | InVEST model Danjiangkou Reservoir area soil conservation function influencing factors the geographical detector |
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