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层状土壤饱和导水率影响的试验研究
曹瑞雪; 贾小旭
2015
Source Publication水土保持学报
Volume29Issue:3Pages:18-21
Abstract

以塿土( Y )、黄绵土(
L )、风沙土( S ) 3种土壤为供试土样,进行室内层状土柱实验,进行3种土样两
两组合的两层性土柱实验和风沙土—黄绵土累次叠加的多层性土柱实验,共11个处理组合。采用定水头
法,测定其饱和导水率( K s )。具体处理为两层土:
Y+S , Y+L , L+S , L+Y , S+Y , S+L (先后顺序分别表
示土层上下);风沙土—黄绵土( S+L )作为层状组合,逐次叠加至5层。结果表明:两层性土壤中,细质地
土壤在下时,其有效 K s 显著低于粗质地土壤在下时的有效 K s 值,而两层土壤有效 K s 主要由细质地土壤
导水特性决定;对于两层土壤的多次叠加, K s 值随分层数目的增加有增大的趋势。

Other Abstract

Three different textured soils : Lou soil (
heavy
loam , Y ), loessial soil ( mediate loam , L ) and sandy soil

sandy
loam , S ), were selected as experimental soils in this study.11treatments of different combinations of
layered soils were established to determine soil saturated hydraulic conductivity
by
soil column simulation
method.In 6treatments , soil columns included two soil layers ( Y+S , Y+L , L+S , L+Y , S+Y , S+L )
and in the rest 5treatments , soil columns contained multi - layered soil , which filled with mediate loam soil
and sandy loam soil layers repeatedly
from 1times to 5times (( S+L ) ×1 ,( S+L ) ×2 ,( S+L ) ×3 ,( S+L )
×4 ,( S+L ) ×5 ) .The letter order indicates the sequencing of layered soils from upper to lower levels in soil
columns.The results showed that in the treatments of 2soil layers , when soil layer of finer texture was below the
other soil layer , the equivalent saturated hydraulic conductivity was significantly lower than the value when the 2soil
layers were switched.The equivalent saturated hydraulic conductivity of two - layer soil columns were mainly
affected
by
hydraulic conductivity of the finer textured soil layer.For the multi
- layered soil columns , the equivalent satu -
rated hydraulic conductivity tended to increase with the increasing
number of soil layers.

Keyword土壤质地 层状土壤 饱和导水率 土柱模拟
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/361005/8382
Collection水保所知识产出(1956---)
Corresponding Author贾小旭
Affiliation1.西北农林科技大学资源与环境学院,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
3.中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室,北京100101
Recommended Citation
GB/T 7714
曹瑞雪,贾小旭. 层状土壤饱和导水率影响的试验研究[J]. 水土保持学报,2015,29(3):18-21.
APA 曹瑞雪,&贾小旭.(2015).层状土壤饱和导水率影响的试验研究.水土保持学报,29(3),18-21.
MLA 曹瑞雪,et al."层状土壤饱和导水率影响的试验研究".水土保持学报 29.3(2015):18-21.
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