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    • 黄河中游中等流域切沟空间分异规律研究

    ZHANG Chunmei,DONG Yawei,WANG Chunmei,YANG Qinke,PANG Guowei,WANG Lei,LONG Yongqing

    Journal of Agricultural Resources and Environment（2023）

    Cited 1|Views22
    Abstract
    水土流失综合治理是黄河中游地区在高质量发展中面临的重要挑战,其中切沟侵蚀是产沙量最大的土壤侵蚀类型之一,严重破坏耕地土壤肥力,对农业生产危害极大.本研究针对黄土高原中等流域切沟空间分布问题,以陕北岔巴沟流域为例,基于2020年高分辨率无人机影像,选取32个小流域,结合野外实测,对切沟空间分布规律进行研究.结果表明:岔巴沟流域中游切沟最多,切沟长度密度主要集中在7～11 km·km-2,切沟长度主要在50 m以内,切沟面积主要在500 m2以内;古代沟谷长度密度与切沟长度密度无显著相关性;切沟密度与坡面坡度、流域坡度、流域坡长等呈显著正相关,与正负地形面积比和流域海拔呈显著负相关,切沟在阴坡的分布密度略大于阳坡.研究结果可明确黄土高原中等流域尺度切沟形态特征及其分布规律,为切沟侵蚀治理及耕地保护提供理论依据.
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    Key words
    unmanned aerial vehicle image,gully,Chabagou watershed,topographic index
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