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晋陕蒙接壤区露天矿层状土壤水分入渗特征与模拟
吴奇凡; 樊 军; 杨晓莉; 潘雅文; 王亚飞
2015
Source Publication土 壤 学 报
Volume52Issue:6Pages:1281-1290
Abstract

分析4种不同结构层状土水分入渗规律,为晋陕蒙接壤区露天矿排土场建设筛选合适的
层状土体。设置沙土、砒砂岩、黄绵土和红黏土4种均质土柱以及黄-沙-红、黄-红-沙、沙-黄-砒、
黄-砒-沙4种层状土,借助室内土柱自动观测系统测定矿区土壤的入渗过程,通过入渗速率、累积入渗
量、湿润锋运移、剖面含水量变化分析不同结构层状土入渗特征,结合晋陕蒙接壤区自然条件,评价
适合排土场建设的层状土体。结果表明:黄-沙-红、沙-黄-砒型层状土在短时间内能储存大量水分,
且第三层土体阻水作用强,黄-沙-红型层状土下层红黏土阻水效果尤其显著,这两种层状土体是矿区
排土场较理想的新土体结构。但是,黄-红-沙型层状土入渗速率慢,在强降雨条件下不能使水分迅速
入渗。黄-砒-沙型层状土湿润锋到达第三层土体后运移速率仍很快,阻水效果差,水分容易渗漏到深
层土壤,这两种层状土结构不宜应用到晋陕蒙矿区排土场建设中。最后探讨了H Y D R U S-1D 对入渗过
程的模拟,利用均质土剖面含水量反演土壤水力参数模拟4种层状土的入渗过程,得到较好的模拟效
果。本文对4种层状土入渗特征的测定与模拟,对于指导露天矿区排土场新土体构筑有一定的理论和现
实意义。

Other Abstract

In order to search for an optim al soil layer structure for constructing an earth dum ping site for
the open-pit m ine at the Jin-Shaan-M eng bordering region,an experim ent on soil water percolation through
4 soil colum ns different in soil layer structure,was carried out. The four soil colum ns were hom ogeneously
packed with Sandy soil,Pi-sha Sandstone,Loessal soil or R ed clay,but different in order,that is,Loessal
soil-Sandy Soil-R ed clay(L-S-R ),Loessal soil-R ed clay-Sandy Soil(L-R -S),Sandy Soil-Loessal soil-
Pi-sha Sandstone(S-L-P),and Loessal soil-Pi-sha Sandstone-Sandy Soil(L-P-S). W ith the aid of an
autom atic observation system (A O S)attached to the colum ns to m onitor variation of soil water content with
tim e,and at the sam e tim e,change in water level in the m arkov bottles and wetting front m ovem ent was
recorded. Based on infiltration rate,cum ulative infiltration,wetting front m ovem ent and change in profile
water content,water percolation through the soil colum ns different in soil layer structure was characterized.
Taking into consideration the natural conditions of the region,evaluation of the colum ns was done for one that
was optim al for construction of the earth dum ping site. R esults show that after water flowing into the second
layer of the colum ns,percolation rate continuously decreased. A fter water flowing into the third soil layer in
Colum ns L-S-R and S-L-P,percolation rate further decreased. W hen the wetting front got to the interface
between the second and the third soil layers in Colum ns L-S-R ,L-R -S,S-L-P and L-P-S within 169.0,
461.1,88.6 and 229.1 m in,respectively,accum ulated percolation reached 19.3,21.3,17.8 and 19.6 cm ,
respectively,in the four colum ns. In the soil colum ns the wetting front m oved through the 3rd layer of soil at
a rate,being 0.34,0.78,0.34 and 1.07% of the rate at which it went down through the 2nd layer in Colum ns
L-S-R ,L-R -S,S-L-P and L-P-S,respectively. In Colum n L-S-R ,the water content m onitored by the
probe at the bottom of the sand soil layer was apparently higher than that m easured by the other two probes in
the layer,while no such phenom enon was observed in the sam e soil layer in the other colum ns. Colum ns L-S-R
and S-L-P could hold a large am ount of water for a short period of tim e,and the third layers of soil tended
to prevent water from percolating downwards,especially in Colum n L-S-R ,where the effect of the third
layer of red clay was very significant. O bviously,these two types of layered soil structure are the ideal ones
for construction of earth dum ping sites for open pit m ines. In Colum n L-R -S water infiltrated and percolated
down the colum n very slowly. In case of heavy rain storm ,rain water could not infiltrate into the soil readily.
In Colum n L-P-S,after wetting front reached the third layer of soil,it kept m oving through the layer rapidly.
O bviously the soil colum n could not hold water and instead let the water go further down into deep soil layers.
So,these two types of layered soil structure are not fit for use in construction of earth dum ping sites. Changes
in water content in soil profiles were m onitored continuously with the aid of TD R . Soil hydraulic param eters
inversed by com bining H Y D R U S-1D with water content in infiltration profile of hom ogeneous soil,after being   collated and optim ized,were used to sim ulate variation of the water content and infiltration rate in infiltration
profile of layered soil structure. Statistical analysis shows that R 2 of m easured and sim ulated infiltration rate
and profile water content varied between 0.86 and 0.97,and MEP and SDP of the infiltration rate did between
-0.000 4 and -0.009 7,0.025 and 0.039,respectively,and MEP and SDP of the profile water content
did between -0.022 2 and 0.005 7,0.034 and 0.092,respectively. Statistics also shows that the inversed
param eters can be used to better sim ulate water infiltration processes through the layer-structured soil. The
findings in earth this experim ent m ay have som e theoretical and practical significance in guiding construction
of earth dum ping sites for open pit m ines.

Keyword层状土 入渗 h y d r u S-1d 矿区复垦
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8393
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学资源环境学院,陕西杨凌 712100
2.西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌 712100
Recommended Citation
GB/T 7714
吴奇凡,樊 军,杨晓莉,等. 晋陕蒙接壤区露天矿层状土壤水分入渗特征与模拟[J]. 土 壤 学 报,2015,52(6):1281-1290.
APA 吴奇凡,樊 军,杨晓莉,潘雅文,&王亚飞.(2015).晋陕蒙接壤区露天矿层状土壤水分入渗特征与模拟.土 壤 学 报,52(6),1281-1290.
MLA 吴奇凡,et al."晋陕蒙接壤区露天矿层状土壤水分入渗特征与模拟".土 壤 学 报 52.6(2015):1281-1290.
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