摘要
典型土壤受侵蚀或雨水冲刷等危害,导致土壤养分流失,因此研究典型土壤积水入渗过程以指导农业生产十分必要。以黑龙江黑土和陕西杨凌黄土为研究对象,在室内将土壤填入土柱中,开展不同温度、水头高度和土质组合条件下典型土壤积水入渗过程试验,研究了黑土及黄土区土壤积水的入渗机理及其影响因素。结果表明:在相同土质和水头高度条件下,高温环境土壤湿润锋的运移距离大于低温环境;在相同土质和温度条件下,水头高度与土壤湿润锋运移距离密切相关,高水头的土壤湿润锋运移距离大于低水头;在相同温度和水头高度条件下,试验过程中陕西杨凌黄土的入渗距离和入渗速率均大于黑龙江黑土,而当两者都达到完全浸润时,黑龙江黑土的入渗距离大于杨凌黄土;土壤在积水条件下,土壤湿润锋的运移距离与时长近似呈幂函数关系,这本质上取决于土壤结构和成分。土壤积水入渗过程研究对农业水资源利用与可持续发展具有重要意义。
Typical soil is damaged by erosion or rain wash,which leads to soil nutrient loss.So it is necessary to study the infiltration process of typical soil ponding to guide agricultural production.The black soil of Heilongjiang and the loess soil of Yangling in Shaanxi Province were used to study the infiltration process of typical soil ponding under different temperatures,head heights and soil textures,the infiltration mechanism of soil ponding in black soil and loess area and the influencing factors by filling the soil into columns indoors.The results show that under the same soil and head conditions,the advancing distance of the wetting front in a high-temperature environment is greater than that in a low-temperature environment.Under the same soil and temperature conditions,the head height is closely related to the advancing distance of the wetting front,and the infiltration distance of the high head is greater than that of the low head.Under the same temperature and heat conditions,the infiltration distance and infiltration rate of Yangling loess are greater than those of Heilongjiang black soil.When both reach full infiltration,the infiltration distance of Heilongjiang black soil is greater than that of Yangling loess.The distance and duration of the advance of wetting fronts under ponding conditions is approximately a power function relationship,depending on soil structure and composition.The study of the infiltration process of soil ponding is of great importance for agricultural water resources use and sustainable development.
作者
刘江霞
杨浩
LIU Jiangxia;YANG Hao(The Department of Journal Publication,China University of Geosciences(Wuhan),Wuhan 430074,China;College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling 712100,China)
出处
《安全与环境工程》
CAS
CSCD
北大核心
2022年第6期156-161,共6页
Safety and Environmental Engineering
关键词
黑龙江黑土
陕西杨凌黄土
土壤积水
入渗过程
影响因素
湿润锋
幂函数关系
Heilongjiang black soil
Yangling loess in Shaanxi
soil ponding
infiltration process
influencing factor
wetting front
power function relationship
作者简介
刘江霞(1976-),女,博士,副编审,主要从事土壤和地下水资源与地学科技期刊方面的研究工作。E-mail:64342522@qq.com。
