水土保持研究2026，Vol.33Issue(1)：29-38,45,11.DOI:10.13869/j.cnki.rswc.2026.01.021
暴雨条件下横垄坡面产汇流特征及其对微地形变化的响应
Runoff generation and confluence characteristics on cross-slopes with ridge tillage under rainstorm conditions and their response to microtopographic variations
摘要
Abstract
[Objective]Surface microtopographic variations inevitably affect the characteristics of slope runoff generation and confluence.Clarifying the characteristics of runoff generation and confluence on cross-slopes with ridge tillage and their relationship with microtopographic variations provides support for the effective prevention and control of regional soil and water loss.[Methods]An indoor artificial rainfall simulation method was used to study microtopographic variations and the runoff generation and confluence characteristics of cross-slopes with ridge tillage under different ridge heights(5,10,15 cm)and ridge distances(50,70,90 cm).The responses of runoff generation and confluence on different slopes to microtopographic variations were analyzed.[Results](1)The surface roughness of each slope increased with increasing ridge height(H)and ridge distance(L),and the effect of ridge height(r=0.92,p<0.01)was much greater than that of ridge distance(r=0.14).(2)Structural hydrological connectivity decreased as the ratio of ridge distance to height(L/H)decreased,while functional hydrological connectivity was lower on cross-slopes with L/H values ranging from 4.7 to 5.0,and the hydrologically connected area ratio decreased by 37.95%compared with the average.(3)The initial runoff generation time first increased and then decreased with L/H,reaching the longest duration(40 min)on the slope with medium-dense ridge(5.0 L/H).The runoff confluence patterns on each slope were mainly parallel,and the confluence networks exhibited distinct mono-fractal evolution characteristics.Both the complexity and self-similarity of these networks were significantly positively correlated with L/H.(4)The direct effect values of surface microtopography on runoff confluence and generation were 0.871(p<0.01)and-0.711(p>0.05),respectively,and microtopographic variations indirectly affected slope runoff generation by directly influencing the confluence process.[Conclusion]In the study area,cross-slopes with ridge tillage and L/H values between 4.7～5.0 demonstrate the optimal regulation of slope runoff generation and confluence.These findings are helpful for the rational layout of cross-slopes with ridge tillage and effective prevention and control of regional soil and water loss.关键词
横垄坡面/微地形变化/产流过程/水文连通性/汇流网络Key words
cross-slopes with ridge tillage/microtopographic variations/runoff generation process/hydrological connectivity/confluence network分类
农业科技引用本文复制引用
Ke Xianze,Yang Yan,Zheng Zicheng,Wang Nana..暴雨条件下横垄坡面产汇流特征及其对微地形变化的响应[J].水土保持研究,2026,33(1):29-38,45,11.基金项目
国家自然科学基金项目"紫色土坡面地表微地形变化与水沙过程的耦合机制"(42177316) （42177316）
