干旱区生态环境知识资源中心(Arid): 不同入渗水头条件下壤砂土的一维垂直人渗特性

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	不同入渗水头条件下壤砂土的一维垂直人渗特性
其他题名	One-dimensional vertical infiltration characteristics of loamy sand at different infiltration heads
	陈永宝; 胡顺军; 罗毅; 田长彦; 尹传华
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2014
卷号	37 期号:4 页码:713-719
中文摘要	通过室内垂直入渗试验,分析了入渗水头对新疆喀什市塔什库尔干县壤砂土一维垂直水分入渗特性的影响。结果表明:累计入渗量与时间的关系符合Kostiakov-Lewis模型和Philip模型,其模型参数A值和吸渗率S随入渗水头的增大而增大,呈良好的线性关系,入渗系数与入渗指数随入渗水头增加呈相反的变化趋势;湿润锋推进距离与时间呈幂函数关系,参数m值随着入渗水头增加而增大,参数n在数值上等于第10个单位时间末和第1个单位时间末湿润锋推进距离比值的常用对数;累计入渗量与湿润锋呈线性关系,其斜率等于湿润区平均含水率与初始含水率之差,且随入渗水头的增大而增大。
英文摘要	Infiltration is the movement of water into the soil profile,which has an important role in field water cycle. The influence of different infiltration head on characteristics of one-dimensional vertical infiltration characteristics of loamy sand has been studied based on vertical infiltration experiments in laboratory. The results showed that the relationship between cumulative infiltration (I) and infiltration time (t) is consistent with Kostiakov-Lewis model [I (t)=At~a + Bt] and Philip model [I (t)=St~(0.5) + B’t] ;The parameter A value increases with the increase of infiltration head (h) ; There existed fairly good linearity between the parameter A value,soil water sorptivity S and infiltration head (h),the slope of them are equal to 0.007 4 and 0.006 6,respectively ; the parameter a value ranged from 0.462 2 to 0.538 9,and its mean value is equal to 0.492 6; the parameter B varied between and 0.020 0 to 0.020 1,parameter B’ changed from 0.018 7 to 0.021 4. The infiltration coefficient (k) and infiltration index (a) presented the opposite trend with the increase in infiltration heads,which is because of soil water press potential and unsaturated hydraulic conductivity. The relationship between wetting front advancing distance (Z_f) and infiltration time is a power function (Z_f=mtn). The model parameter m value increases with the increase of infiltration heads and the slope of them is equal to 0.006 4 ; the parameter n value is equal to common logarithm of the ratio of wetting front advancing distance at the end of the tenth unit time to that at the end of the first unit time. The relationship between the cumulative infiltration and wetting front advancing distance is good linear (I=betaZ_f),and the slope (beta),increases with the increase of infiltration heads,is equal to the difference between mean soil water content (theta_(mean)) and initial water content (theta_i) in humid region ; For any two infiltration heads h_1 and h_2,a relationship was existed about theta_(mean)(h_1) - theta_(mean)(h_2)=beta (h_1) -beta (h_2). This research result is of great theoretical value and practical significances to preventing soil erosion,thwarting desertification and protecting ecological environment.
中文关键词	壤砂土 ; 垂直入渗 ; 入渗水头 ; 湿润锋 ; 累积入渗量
英文关键词	loamy sand vertical infiltration infiltration head wetting front cumulative infiltration
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5205374
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231124
作者单位	中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	陈永宝,胡顺军,罗毅,等. 不同入渗水头条件下壤砂土的一维垂直人渗特性[J]. 中国科学院新疆生态与地理研究所,2014,37(4):713-719.
APA	陈永宝,胡顺军,罗毅,田长彦,&尹传华.(2014).不同入渗水头条件下壤砂土的一维垂直人渗特性.干旱区地理,37(4),713-719.
MLA	陈永宝,et al."不同入渗水头条件下壤砂土的一维垂直人渗特性".干旱区地理 37.4(2014):713-719.