水土保持学报2025，Vol.39Issue(5)：63-70,79,9.DOI:10.13870/j.cnki.stbcxb.2025.05.012
桂东南崩岗侵蚀区崩壁龛穴的形态及空间分布特征
Morphological and Spatial Distribution Characteristics of Niches in Collapsing Walls in Southeastern Guangxi Benggang Erosion Area
摘要
Abstract
[Objective]The formation and development of niches in collapsing walls intensify the erosion of benggang and threaten land resources and the ecological environment.[Methods]The spatial distribution and morphological characteristics of niches in typical benggang erosion areas were investigated to explore their distribution patterns and evolutionary process.[Results]1)Niches were mainly found in the lower part of collapsing walls,accounting for 45.83%,with 90.28%developed in the sandy layer,and the angles mainly ranged from 30° to 50°(50.69%).2)Niches showed strong variability in morphological parameters,with 90.97%of the niches having a flattening ratio greater than 0.1,primarily presenting as elliptical and extremely elliptical.70.80%of the niches had both length-to-depth and short-to-depth ratios greater than 1,and 22.20%had a length-to-depth ratio greater than 1 and a short-to-depth ratio less than 1,reflecting that their plane morphology primarily extended vertically,and their evolutionary stage was influenced by horizontal expansion.3)There was a highly significant positive correlation among the long axis,short axis and concavity depth of the niche(p<0.01),and the length-to-depth ratio and the short-to-depth ratio could indirectly influence each other and jointly drive the morphological development of the niche.[Conclusion]The study reveals the developmental characteristics and spatial distribution of niches in collapsing walls,providing a theoretical basis for the prevention and control of benggang erosion.关键词
龛穴/空间分布/形态特征/崩岗侵蚀Key words
niches/spatial distribution/morphological characteristics/benggang erosion分类
农业科技引用本文复制引用
罗舒玉,何玲,林哲,王建羽,段晓倩,邓羽松..桂东南崩岗侵蚀区崩壁龛穴的形态及空间分布特征[J].水土保持学报,2025,39(5):63-70,79,9.基金项目
国家自然科学基金项目(42477350,42467041,42107350) （42477350,42467041,42107350）
