摘要
文章基于阳曲县阳坡小流域坡面径流场降水、径流及泥沙监测成果,分析自然降水条件下黄土高原典型坡面径流泥沙变化特征。结果表明:2021年6—10月径流小区径流量排序为3号裸地2.753 m3>8号裸地2.713 m3>9号农地1.681 m3>10号农地1.654 m3>4号自然坡0.742 m3>7号自然坡0.574 m3>5号林地0.432 m3>2号林地0.301 m3>6号灌草地0.012 m3;土壤侵蚀量为3号裸地26.67t/hm^(2)>8号裸地24.03 t/hm^(2)>9号农地23.59 t/hm^(2)>10号农地21.25 t/hm^(2)>4号自然坡0.94 t/hm^(2)>7号自然坡0.87 t/hm^(2)>5号林地0.72 t/hm^(2)>2号林地0.60 t/hm^(2)>6号灌草地0.01t/hm^(2),1号灌草地小区未发生产流产沙。在相同降雨条件下,径流量、土壤侵蚀量与降雨量均呈显著的正相关关系。水土保持措施可削减径流和泥沙,建议在阳坡小流域合理种植乔木林和灌木埂并配套布设鱼鳞坑,可以有效发挥水土保持防治效果。
This study analyse the characteristics of sediment dynamics under natural precipitation conditions,through systematic monitoring precipitation and runoff sediment in the runoff field of sun-facing slope in Yangqu County's small watershed.during the 2021 monsoon season(June—October).The fingins showed that:the runoff volumes followed the sequence:bare soil plot 3(2.753 m^(3))>bare soil plot 8(2.713 m^(3))>farmland plot 9(1.681 m^(3))>farmland plot 10(1.654 m^(3))>natural slope plot 4(0.742 m^(3))>natural slope plot 7(0.574 m^(3))>forest plot 5(0.432 m^(3))>forest plot 2(0.301 m^(3))>irrigated grassland plot 6(0.012 m^(3));soil erosion rates exhibited:bare soil plot 3(26.67 t ha^(-2))>bare soil plot 8(24.03 t ha^(-2))>farmland plot 9(23.59 t ha^(-2))>farmland plot 10(21.25 t ha^(-2))>natural slope plot 4(0.94 t ha^(-2))>natural slope plot 7(0.87 t ha^(-2))>forest plot 5(0.72 t ha^(-2))>forest plot 2(0.60 t ha^(-2))>irrigated grassland plot 6(0.01t ha^(-2)).No sediment was produced for the irrigated grassland plot 1.Under the same precipitation conditions,there was a significant positive correlation between precipitation and both runoff and soil erosion.The results demonstrated that water conservation measures can reduce runoff and sediment.So it may effectively enhance soil and water conservation effects for the sun-facing slope in the small watershed,by recommending plant trees and shrubs reasonably with set up fish-scale pits.
作者
陈媛媛
Chen Yuanyuan(Institute of Soil and Water Conservation Science,Shanxi Agricultural University,Taiyuan,Shanxi 030013,China)
出处
《山西水土保持科技》
2025年第2期20-23,共4页
Soil and Water Conservation Science and Technology in Shanxi
基金
山西省水利科技研发服务项目(2025GM29)
山西省水利科学技术研究与推广项目(2024GM29)。
关键词
阳坡坡面径流场
水土保持措施
径流量
土壤侵蚀量
Runoff field on Sun-Facing slope
Soil and water conservation measures
Runoff
Soil erosion
