Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023293 |
Time Compression Approximation Relationship for Infiltration in the Presence of a Shallow Water Table: Evaluating the Role of Peclet Number | |
Yao, Lili1; Wang, Dingbao1; Hooshyar, Milad1; Singh, Arvind1; Sivapalan, Murugesu2,3 | |
2018-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:11页码:9384-9397 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The time compression (or time condensation) approximation (TCA) is commonly used in conjunction with an infiltration capacity equation for predicting the postponding infiltration rate, or, more generally, infiltration under time-varying precipitation. In this paper a power function relationship for TCA between infiltration capacity and its time derivative is proposed for infiltration in the presence of a shallow water table. The results show that the exponent () in the power function relationship is not a constant but decreases as infiltration proceeds. The change of indicates that the TCA relationship changes during infiltration and further suggests the necessity of using different TCA relationships for predicting infiltration rate during different stages after ponding. We argue that the change of is due to the gradual dynamic change of the relative role of gravity and capillarity during infiltration. A Peclet number ( is proposed for measuring the relative effect of gravity and capillarity. In the early times of infiltration when, with the increase of infiltration when Pe < 1, with the increase of Pe, ss decreases roughly from 3.5 to 2 for clay, silty clay loam, and silty loam, and from 3 to 2 for sandy loam and sand; during the longer times when Pe > 1, ss has a linear relationship with Pe. The relationship between Pe and ss provides an objective approach to select the suitable TCA function during different infiltration stages after ponding. |
英文关键词 | infiltration Richards' s equation TCA Peclet number shallow water table |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453369400045 |
WOS关键词 | SOLUTE TRANSPORT ; HYDRAULIC CONDUCTIVITY ; BREAKTHROUGH CURVES ; RELATIVE IMPORTANCE ; FLOW ; IRRIGATION ; SIMULATION ; EQUATION ; MODELS ; SOILS |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20986 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Cent Florida, Dept Civil Environm & Construct Engn, Orlando, FL 32816 USA; 2.Univ Illinois, Dept Civil & Environm Engn, Urbana, IL USA; 3.Univ Illinois, Dept Geog & Geog Informat Sci, Urbana, IL USA |
推荐引用方式 GB/T 7714 | Yao, Lili,Wang, Dingbao,Hooshyar, Milad,et al. Time Compression Approximation Relationship for Infiltration in the Presence of a Shallow Water Table: Evaluating the Role of Peclet Number[J]. WATER RESOURCES RESEARCH,2018,54(11):9384-9397. |
APA | Yao, Lili,Wang, Dingbao,Hooshyar, Milad,Singh, Arvind,&Sivapalan, Murugesu.(2018).Time Compression Approximation Relationship for Infiltration in the Presence of a Shallow Water Table: Evaluating the Role of Peclet Number.WATER RESOURCES RESEARCH,54(11),9384-9397. |
MLA | Yao, Lili,et al."Time Compression Approximation Relationship for Infiltration in the Presence of a Shallow Water Table: Evaluating the Role of Peclet Number".WATER RESOURCES RESEARCH 54.11(2018):9384-9397. |
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