水土保持研究2026，Vol.33Issue(3)：247-256,265,11.DOI:10.13869/j.cnki.rswc.2026.03.001
喀斯特区浅层岩溶裂隙土壤水分调蓄功能
Soil water storage and regulation functions of shallow karst fissures in karst areas
摘要
Abstract
[Objective]This study aims to determine the characteristics of soil moisture changes in shallow karst fissures in karst areas and to explore the soil moisture regulation and storage functions at different depths,providing a scientific basis for hydrological regulation and ecological restoration in these regions.[Methods]In this study,shallow karst fissure soils in the karst area were taken as the research object.Based on in-situ monitoring data,the vertical distribution characteristics of soil moisture,rainfall response patterns,and water storage capacity were systematically analyzed to reveal their water regulation and storage mechanisms.[Results](1)Seasonal rainfall affected the vertical differentiation of soil moisture in shallow karst fissures.Under dry season conditions,soil moisture stability increased with soil depth.Under rainy season conditions,the coefficients of variation(CV)of soil moisture in each layer followed the order of S layer(19.1%)>U3 layer(14.6%)>U1 layer(9.3%)>U2 layer(8.9%),indicating that moisture dynamics were more significant in the shallow layers.(2)Under four typical rainfall conditions,light rain triggered moisture change only in the S layer,moderate rain significantly affected the U3 layer,and heavy rain and rainstorms led to responses across all soil layers.Shallow layers(S,U1)exhibited much stronger responses than deeper layers(U2,U3).(3)Influenced by soil layer thickness,average water storage followed the order of U3 layer(314.6 mm)>U2 layer(220.3 mm)>U1 layer(128.7 mm)>S layer(54.8 mm).During the dry season,water storage in deep soil layers(U2,U3)was more stable than in shallow soil layers(S,U1).[Conclusion]The soil water regulation and storage functions of shallow karst fissure soils in karst areas are jointly regulated by soil moisture vertical differentiation and rainfall response.During the dry season,deep soil layers(U2,U3)maintain regional hydrological balance through stable water storage.During the rainy season,shallow soil layers(S,U1)achieve efficient water regulation and storage through rapid dynamic moisture response.Water storage capacity varies significantly across soil layers,with the U3 layer showing higher storage capacity.This layer not only plays a key role in regional water supply but also provides important moisture support for vegetation restoration in karst areas.关键词
喀斯特/浅层岩溶裂隙土壤/水分调蓄Key words
karst/shallow karst fissure soil/water regulation and storage分类
农业科技引用本文复制引用
杨影,严友进,戴全厚..喀斯特区浅层岩溶裂隙土壤水分调蓄功能[J].水土保持研究,2026,33(3):247-256,265,11.基金项目
国家自然科学基金"草海流域水文地质特征及面源污染响应机制"(42467045) （42467045）
国家自然科学基金"喀斯特碳酸盐与碎屑岩交互区坡面土壤侵蚀过程与机理"(42167044) （42167044）
