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基于地理探测器的喀斯特不同地貌形态类型区土壤侵蚀定量归因
Quantitative attribution analysis of soil erosion in different morphological types of geomorphology in karst areas: Based on the geographical detector method

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王欢 1,2   高江波 1 *   侯文娟 1  
文摘 土壤侵蚀形成机制与影响因素识别是当前研究的核心与前沿议题,然而从多因素综合作用的角度进行定量归因仍需加强。以喀斯特典型峰丛洼地流域为研究区,基于GIS手段和RUSLE模型模拟土壤侵蚀,综合土地利用、坡度、降雨、高程、岩性、植被覆盖度等影响因子,应用地理探测器方法针对喀斯特不同地貌形态类型区进行土壤侵蚀的定量归因研究。结果表明,各影响因子对土壤侵蚀的解释力及因子间耦合作用程度在不同地貌形态类型区差异显著,其中土地利用和坡度是决定土壤侵蚀空间异质的主导因子,但在山地丘陵区,随着地形起伏度的升高,坡度的控制作用下降,即地理探测器q值表现为中海拔丘陵>小起伏中山>中起伏中山;生态探测器显示土地利用对土壤侵蚀的影响相比于其他因子有显著差异;双因子交互作用有助于增强对土壤侵蚀的解释力,土地利用与坡度的协同作用对土壤侵蚀的解释力达到70%以上;对于土壤侵蚀空间分布的差异性检验,风险探测器显示在小起伏中山、中起伏中山等地貌形态类型中,具有显著差异的影响因子分层组合数占比至少55%。因而,喀斯特地区土壤侵蚀的治理应综合考虑不同地貌形态类型区土壤侵蚀影响机制的空间异质性。
其他语种文摘 The formation mechanism and influencing factors identification of soil erosion are the core and frontier issues of current research. However, studies on the multifactor synthesis are still insufficient. In this study, the simulation of soil erosion and its quantitative attribution analysis have been conducted in different morphological types of geomorphology in a typical karst basin based on the RUSLE model and the geographical detector method. The influencing factors, such as land use type, slope, rainfall, elevation, lithology and vegetation cover, have been taken into consideration. Results show that the strength of association between the six influencing factors and soil erosion was notably different in various morphological types of geomorphology. Land use type and slope were the dominant factors of soil erosion in the Sancha River Basin, especially for land use type whose power of determinant (q value) for soil erosion was much higher than that of other factors. The q value of slope declined with the increase of relief in mountainous areas, namely it was ranked as follows: middle elevation hill > small relief mountain > middle relief mountain. Multi-factor interactions were proven to significantly strengthen soil erosion, particularly for the combination of land use type with slope, which can explain 70% of soil erosion distribution. It can be found that soil erosion in the same land use type with different slopes (such as dry land with a slope of 5°and dry land with slopes above 25°) or in the diverse land use types with the same slopes (such as dry land with a slope of 5° and forest with a slope of 5°), varied greatly. This indicates that prohibiting steep slope cultivation and the Grain for Green Project are reasonable measures to harness soil erosion in karst areas. Based on statistics of soil erosion difference between diverse stratifications of each influencing factor, results of risk detector suggest that the amount of stratification combinations with significant difference accounted for 55% at least in small and middle relief mountains. Therefore, the spatial heterogeneity of soil erosion and its influencing factors in different morphological types of geomorphology should be investigated to control karst soil loss more effectively.
来源 地理学报 ,2018,73(9):1674-1686 【核心库】
DOI 10.11821/dlxb201809005
关键词 土壤侵蚀 ; 定量归因 ; RUSLE模型 ; 地理探测器 ; 三岔河流域
地址

1. 中国科学院地理科学与资源研究所, 中国科学院陆地表层格局与模拟重点实验室, 北京, 100101  

2. 中国科学院大学, 北京, 100049

语种 中文
文献类型 研究性论文
ISSN 0375-5444
学科 自然地理学
基金 国家973计划 ;  国家自然科学基金项目
文献收藏号 CSCD:6322268

参考文献 共 29 共2页

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引证文献 73

1 邹雅婧 渭北矿区土壤侵蚀评估及驱动因素分析 干旱区地理,2019,42(6):1387-1394
CSCD被引 15

2 邵雅静 基于限制因子分析的耕地质量提升潜力分区 生态学杂志,2019,38(8):2442-2449
CSCD被引 7

显示所有73篇文献

论文科学数据集

1. 重点区域20国300米分辨率土壤侵蚀强度数据集(2015)

2. 泛第三极65国1km分辨率土壤侵蚀强度数据集(2015)

3. 青藏高原300米分辨率土壤侵蚀(水蚀)强度数据集(1992、2005、2015)

数据来源:
国家青藏高原科学数据中心

1. 三峡水库毗邻地区土壤侵蚀量与影响因子评估数据集(1982-2015)

2. 中国土壤侵蚀变化数据集(1985-2011)

数据来源:
国家对地观测科学数据中心
PlumX Metrics
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