摘要
为揭示黄土高填方场地的降雨入渗规律,在延安某黄土高填方场地建立监测站,对天然降雨入渗条件下28 m深度范围内的土体含水率进行为期31个月的连续监测,结合降雨量、蒸发量及气温数据分析压实黄土中的水分迁移规律。结果表明:地面下3.5 m是大气影响深度,随降雨量和蒸发量变化,土体含水率变化存在明显波峰与波谷,并呈周年性变化趋势;地面下1.0 m是大气急剧影响深度,当单日降雨量<29 mm/d时,土体含水率在周年性变化趋势背景下波动较小,当单日降雨量>29 mm/d后土体含水率出现跳跃式骤升;降雨量越大,土体含水率的增幅越大,降雨持续的时间越长,水分迁移入渗的深度越大,监测期内降雨最大入渗深度为6.0~7.0 m。
To unveil the rainfall infiltration patterns at a loess deep filled site,a monitoring station was established in Yan’an to continuously monitor the soil moisture content within a 28 m depth over 31 months under natural rainfall conditions.The water migration within compacted loess was scrutinized based on rainfall,evaporation,and temperature data.Results indicate that atmospheric influence extends to a depth of 3.5 m.With the change of rainfall and evaporation,soil water content exhibits obvious peaks and troughs and annual trend.At 1.0 m depth,atmospheric influence is more pronounced.Soil moisture content shows slight fluctuations below 29 mm/d daily rainfall,followed by sharp increases beyond this threshold.Greater rainfall intensity and duration lead to deeper water migration and infiltration,with a maximum depth observed between 6.0-7.0 m during the monitoring period.
作者
于永堂
孙茉
曹静远
朱建民
张龙
YU Yong-tang;SUN Mo;CAO Jing-yuan;ZHU Jian-min;ZHANG Long(China United Northwest Institute for Engineering Design&Research Co.,Ltd.,Xi’an 710077,China;College of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Power China Northwest Engineering Corporation Limited,Xi’an 710065,China;China Jikan Research Institute of Engineering Investigation and Design Co.,Ltd.,Xi’an 710021,China)
出处
《长江科学院院报》
CSCD
北大核心
2024年第7期103-109,共7页
Journal of Changjiang River Scientific Research Institute
基金
陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-086)
陕西省重点研发计划项目(2023-YBSF-499)
国家自然科学基金项目(42072302)。
关键词
黄土
高填方场地
含水率
降雨
水分迁移
loess
deep filled ground
moisture content
rainfall
water migration
