DOI: 10.5194/hess-22-53-2018
Scopus记录号: 2-s2.0-85042461142
论文题名: Shallow water table effects on water, sediment, and pesticide transport in vegetative filter strips-Part 1: Nonuniform infiltration and soil water redistribution
作者: Munõz-Carpena R ; , Lauvernet C ; , Carluer N
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2018
卷: 22, 期: 1 起始页码: 53
结束页码: 70
语种: 英语
Scopus关键词: Bandpass filters
; Floods
; Groundwater
; Land use
; Pesticide effects
; Pesticides
; Pollution
; Rain
; Runoff
; Soil moisture
; Soils
; Water pollution
; Hydrological models
; Pesticide transport
; Pollutant transport
; Rainfall intensity
; Shallow water tables
; Soil hydraulic functions
; Surface infiltration
; Vegetative filter strips
; Infiltration
; algorithm
; buffer zone
; filter
; floodplain
; hydraulic property
; hydrological modeling
; infiltration
; pesticide
; pollutant transport
; rainfall
; runoff
; sediment transport
; shallow water
; soil moisture
; soil profile
; soil water
; water table
英文摘要: Vegetation buffers like vegetative filter strips (VFSs) are often used to protect water bodies from surface runoff pollution from disturbed areas. Their typical placement in floodplains often results in the presence of a seasonal shallow water table (WT) that can decrease soil infiltration and increase surface pollutant transport during a ainfall-runoff event. Simple and robust components of hydrological models are needed to analyze the impacts of WT in the landscape. To simulate VFS infiltration under realistic rainfall conditions with WT, we propose a generic infiltration solution (Shallow Water table INfiltration algorithm: SWINGO) based on a combination of approaches by Salvucci and Entekhabi (1995) and Chu (1997) with new integral formulae to calculate singular times (time of ponding, shift time, and time to soil profile saturation). The algorithm was tested successfully on five distinct soils, both against Richards's numerical solution and experimental data in terms of infiltration and soil moisture redistribution predictions, and applied to study the combined effects of varying WT depth, soil type, and rainfall intensity and duration. The results show the robustness of the algorithm and its ability to handle various soil hydraulic functions and initial nonponding conditions under unsteady rainfall. The effect of a WT on infiltration under ponded conditions was found to be effectively decoupled from surface infiltration and excess runoff processes for depths larger than 1.2 to 2gm, being shallower for fine soils and shorter events. For nonponded initial conditions, the influence of WT depth also varies with rainfall intensity. Also, we observed that soils with a marked air entry (bubbling pressure) exhibit a distinct behavior with WT near the surface. The good performance, robustness, and flexibility of SWINGO supports its broader use to study WT effects on surface runoff, infiltration, flooding, transport, ecological, and land use processes. SWINGO is coupled with an existing VFS model in the companion paper (Lauvernet and Munõz-Carpena, 2018), where the potential effects of seasonal or permanent WTs on VFS sediment and pesticide trapping are studied. © 2018 Author. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79438
Appears in Collections: 气候变化事实与影响
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作者单位: University of Florida, Department of Agricultural and Biological Engineering, P.O. Box 110570, Gainesville, FL, United States; Irstea UR MALY, Centre de Lyon-Villeurbanne, Villeurbanne Cedex, France
Recommended Citation:
Munõz-Carpena R,, Lauvernet C,, Carluer N. Shallow water table effects on water, sediment, and pesticide transport in vegetative filter strips-Part 1: Nonuniform infiltration and soil water redistribution[J]. Hydrology and Earth System Sciences,2018-01-01,22(1)