ISWC OpenIR  > 水保所知识产出(1956---)
张敬晓1; 汪星2; 汪有科1,2; 靳姗姗1; 董建国2; 汪治同3
Source Publication水土保持学报


Other Abstract

Abstract:Based on the fact of the formation of large-scale soil dry layers in recent years,a field soil column
up to 10m was established to simulate the drying soil in jujube forests at the Mizhi experimental station,
which is located in the north of Shaanxi Province.The purpose was to explore the regularities of rainfall infiltration
and water migration,also to clarify the infiltration capability of dry loess.By using the CS650-
CR1000automatic system,changes of soil moisture within different depths were observed continuously under
natural conditions.Meanwhile,the precipitation during the monitoring period was recorded by an automatic
weather station.The results showed that both of the depths of infiltration and migration under independent
rainfall mainly depended on the precipitation.The depths could reach up to 90-140cm,70-80cm,and 40
cm,respectively,when influenced by heavy rain,middle rain,and light rain.With the same precipitation,it
was affected by other factors such as rainfall intensity and initial soil water content.The greater the rainfall
intensity and the higher the initial soil water content was,the deeper the depths were.Under intermittent
rainfall conditions,several rainfall events promoted infiltration and migration interactively.Compared with
independent rainfall,the intermittent rainfall could significantly increase the infiltration depth by 100%-
160%,and the migration depth by 91%-197% with the same precipitation.In the loess region,not all the
rainfall events could influence the soil.During the observation periods,the effectiveness of the rainfall frequency and amount were 36.3%,72.7%respectively.Under the influence of multiple rainfall events,the
soil profile tended to be layered.According to the changes of soil moisture,the affected soil could be mainly
divided into three levels,i.e.the sensitive layer of rainfall infiltration within 90cm,the delayed layer of
rainfall infiltration between 90cm and 160cm,and the migrating layer of rainfall between 160cm and 240
cm.The results are of great theoretical and practical significance to the restoration of woodland drying soil
and scientific management of soil moisture in the loess hilly region.

Keyword降雨 入渗 迁移 湿润锋 土壤水分
Indexed By中文核心期刊要目总览
Document Type期刊论文
Recommended Citation
GB/T 7714
张敬晓,汪星,汪有科,等. 黄土丘陵区林地干化土壤降雨入渗及水分迁移规律[J]. 水土保持学报,2017,31(3):231-238.
APA 张敬晓,汪星,汪有科,靳姗姗,董建国,&汪治同.(2017).黄土丘陵区林地干化土壤降雨入渗及水分迁移规律.水土保持学报,31(3),231-238.
MLA 张敬晓,et al."黄土丘陵区林地干化土壤降雨入渗及水分迁移规律".水土保持学报 31.3(2017):231-238.
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