水土保持研究2024，Vol.31Issue(6)：22-28,7.DOI:10.13869/j.cnki.rswc.2024.06.039
基于放水冲刷草本形态变化对石漠化坡地产流影响研究
Study on the Impact of Herbaceous Morphological Changes on Runoff Generation in Karst Rocky Desertification Slopes Based on Water Erosion Experiments
摘要
Abstract
[Objective]The aims of this study are to investigate the impact of herbaceous morphology changes on the spatiotemporal transformation of slope runoff under different slope conditions in karstified areas,and to provide theoretical support for soil and water conservation in these regions.[Methods]A flume experiment was conducted to simulate karst slope cultivated land,setting up three post-senescent herbaceous cover scenarios:whole-plant slope,root-only slope,and bare slope,across three gradients(5°,15°,and 25°).With a subsurface fissure density of 0.5％and a scouring flow rate of 6 L/min,the effects of herbaceous morphology changes on runoff production in karst slopes were explored.[Results]The whole-plant morphology was found to be the most effective herbaceous state for delaying the initiation of runoff on slope.As the gradient increased to 25°,the influence of herbaceous morphology on the initial runoff timing became non-significant.Bare slopes exhibited the highest average surface runoff modulus,while the runoff processes on whole-plant slopes were the most complex and had the most significant impact on fissure flow.Slope was identified as a key factor in the distribution of slope runoff,and whole-plant morphology could still affect the distribution of slope runoff at a fixed gradient,with the potential to alter runoff distribution by up to 15％.[Conclusion]Whole-plant slopes effectively disperse runoff,reduce surface runoff,and decrease erosion risk.Root-only slopes increase runoff infiltration,thereby reducing erosion risk on the slope.关键词
石漠化坡地/产流过程/草本形态/冲刷试验Key words
karst rocky desertification/runoff process/herbaceous vegetation/erosion experiments分类
农业科技引用本文复制引用
王晨阳,戴全厚,甘贤民,徐小金,周红,张心印..基于放水冲刷草本形态变化对石漠化坡地产流影响研究[J].水土保持研究,2024,31(6):22-28,7.基金项目
国家自然科学基金(42167044) （42167044）
贵州大学培育项目(贵大培育[2019]10号) （贵大培育[2019]10号）
