|吴奇凡; 樊 军; 杨晓莉; 潘雅文; 王亚飞
|Source Publication||土 壤 学 报
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
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.
h y d r u S-1d
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.
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.
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.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.