Land dissection density(LDD)provides morphological evidence regarding prior intense soil erosion and quantifies the distribution of land dissections.A comprehensive understanding of the potential factors influencing t...Land dissection density(LDD)provides morphological evidence regarding prior intense soil erosion and quantifies the distribution of land dissections.A comprehensive understanding of the potential factors influencing the spatial pattern and value of the LDD is vital in geological disasters,soil erosion,and other related domains.Land dissection phenomena in China affects large areas with different morphological,pedological,and climatic characteristics.Prior studies have focused on the potential factors influencing the LDD at a watershed scale.However,these results are insufficient to reflect the status quo of dissection development and its primary influencing factors on a national scale.LDD’s spatial patterns and the dominant factors at a regional scale in millions of square kilometers remain to be ascertained.This study used the geomorphon-based method and the geographical detector model to quantify the spatial pattern of LDD over China and identify the dominant factors affecting this pattern in China’s six first-order geomorphological regions(GR1~GR6).The results yield the following findings:(1)LDD in China ranges from 0~4.55 km/km^(2),which is larger in central and eastern regions than in other regions of China;(2)dominant factors and their dominant risk subcategories vary with each geomorphological region’s primary internal and external forces;(3)the influence of natural factors is more significant on the large regional scale in millions of square kilometers compared to anthropogenic factors;relief degree of land surface(RDLS)is dominant in GR1,GR2,and GR5;the slope is dominant in GR6,soil type is dominant in GR3 and GR4,and lithology plays a critical role in the dominant interactions of GR3,GR4,and GR6;(4)the interactions between factors on LDD’s spatial pattern have a more significant effect than individual factors.展开更多
水资源是生态环境与社会经济发展之间的焦点和枢纽,流域是水文水资源研究的基本单元,在流域尺度上开展综合集成的水文水资源研究是当前水科学研究的热点。我国西北地区的黑河流域是国内第二大内陆河流域,由于其独特的水文与地理特性成...水资源是生态环境与社会经济发展之间的焦点和枢纽,流域是水文水资源研究的基本单元,在流域尺度上开展综合集成的水文水资源研究是当前水科学研究的热点。我国西北地区的黑河流域是国内第二大内陆河流域,由于其独特的水文与地理特性成为流域科学研究的重点流域之一。基于Web of Science核心合集数据库,从学科发展与问题聚焦相结合、时间演化与空间变化相结合的全新视角评价我国黑河流域研究取得的科学进展,并与世界其他流域科学研究进行对比分析。结果显示,黑河流域研究在遥感、蒸散发、水循环、干旱区水资源管理与利用、气候变化等方面的研究为流域科学相关研究做出了积极贡献。近30年来,特别是国家自然科学基金重大研究计划"黑河流域生态—水文过程集成研究"的实施和黑河生态水文遥感等大型野外观测试验的开展大力推进了黑河流域科学研究,黑河流域研究论文的数量在世界流域科学研究中的排名已经进入前20位。基于文献计量的数据挖掘和对比研究可以为流域科学研究提供借鉴。展开更多
基金supported by the Natural Science Foundation of China(Grants No.42167038,42161005)the Guangxi Scientific Project(Grants No.AD19110140)the Guangxi Scholarship Fund of the Guangxi Education Department and Guangxi Education Department project(Grants No.2022KY1168).
文摘Land dissection density(LDD)provides morphological evidence regarding prior intense soil erosion and quantifies the distribution of land dissections.A comprehensive understanding of the potential factors influencing the spatial pattern and value of the LDD is vital in geological disasters,soil erosion,and other related domains.Land dissection phenomena in China affects large areas with different morphological,pedological,and climatic characteristics.Prior studies have focused on the potential factors influencing the LDD at a watershed scale.However,these results are insufficient to reflect the status quo of dissection development and its primary influencing factors on a national scale.LDD’s spatial patterns and the dominant factors at a regional scale in millions of square kilometers remain to be ascertained.This study used the geomorphon-based method and the geographical detector model to quantify the spatial pattern of LDD over China and identify the dominant factors affecting this pattern in China’s six first-order geomorphological regions(GR1~GR6).The results yield the following findings:(1)LDD in China ranges from 0~4.55 km/km^(2),which is larger in central and eastern regions than in other regions of China;(2)dominant factors and their dominant risk subcategories vary with each geomorphological region’s primary internal and external forces;(3)the influence of natural factors is more significant on the large regional scale in millions of square kilometers compared to anthropogenic factors;relief degree of land surface(RDLS)is dominant in GR1,GR2,and GR5;the slope is dominant in GR6,soil type is dominant in GR3 and GR4,and lithology plays a critical role in the dominant interactions of GR3,GR4,and GR6;(4)the interactions between factors on LDD’s spatial pattern have a more significant effect than individual factors.
文摘水资源是生态环境与社会经济发展之间的焦点和枢纽,流域是水文水资源研究的基本单元,在流域尺度上开展综合集成的水文水资源研究是当前水科学研究的热点。我国西北地区的黑河流域是国内第二大内陆河流域,由于其独特的水文与地理特性成为流域科学研究的重点流域之一。基于Web of Science核心合集数据库,从学科发展与问题聚焦相结合、时间演化与空间变化相结合的全新视角评价我国黑河流域研究取得的科学进展,并与世界其他流域科学研究进行对比分析。结果显示,黑河流域研究在遥感、蒸散发、水循环、干旱区水资源管理与利用、气候变化等方面的研究为流域科学相关研究做出了积极贡献。近30年来,特别是国家自然科学基金重大研究计划"黑河流域生态—水文过程集成研究"的实施和黑河生态水文遥感等大型野外观测试验的开展大力推进了黑河流域科学研究,黑河流域研究论文的数量在世界流域科学研究中的排名已经进入前20位。基于文献计量的数据挖掘和对比研究可以为流域科学研究提供借鉴。
基金国家自然科学基金黑河流域生态-水文集成研究计划重点项目“流域文化变迁与生态演化相互作用对流域生态政策影响的机理研究--黑河与澳大利亚墨累-达令河流域对比研究”(编号:91125007)澳大利亚自然科学基金项目“Systemic and adaptive water governance:Lessons for Australia from China and South Africa”(编号:LP100100546)资助
