A deterministic-empirical model of the effect of the capillary fringe on near-stream area runoff 2. Testing and application

Jayatilaka, C. J.; Gillham, Robert W.; Blowes, David W.; Nathan, Rory

doi:10.1016/0022-1694(95)02986-9

Cited by 14 publications

(5 citation statements)

References 6 publications

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“…The CF has also been shown to impact groundwater response to other transients influencing the groundwater system. Examples include the impact of the CF on the specific yield of an aquifer (Nachabe, 2002); water table dynamics, particularly in response to infiltration events (e.g., Rosenberry and Winter, 1997; Neilsen and Perrochet, 2000); hillslope hydrologic processes (Iverson et al, 1997; Torres et al, 1998); storm hydrographs in streams (e.g., Williams et al, 2002; Jayatilaka et al, 1996; Jayatilaka and Gillham, 1996); the response to wave run‐up (Li et al, 1997); and groundwater response to tidal fluctuations (Ataie‐Ashtiana et al, 2001).…”

Section: Flow Within and Across The Capillary Fringementioning

confidence: 99%

Impact of the Capillary Fringe on Local Flow, Chemical Migration, and Microbiology

Berkowitz¹,

Silliman²,

Dunn³

2004

Vadose Zone Journal

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We critically examine historical and recent studies of flow and transport at the local scale within the capillary fringe (CF). The characterization of subsurface pathways traveled by water—and the impact of these pathways on the movement of chemicals and the viability of subsurface microbial populations—has been the subject of intensive investigation in the last 50 yr in the fields of soil science and hydrology. However, consideration of the complexity of local pathways within the CF has been largely ignored. Recent studies, as well as some historical ones, have reported observations of fluid flow and chemical transport within the CF, emphasizing the impact of physical heterogeneity and exchange of water and chemicals between the CF and the region below the water table. These observations lead to the conclusion that the CF may affect, at the local scale, the natural geochemical and microbial conditions present in the region of transition from unsaturated to saturated groundwater flow far more significantly than is usually assumed. Here, we examine underlying physical factors that control local flow and transport behaviors in and across the CF and illustrate these factors through examination of images collected in the laboratory. We also provide a brief survey of the literature on the CF. It is argued that existing definitions of the CF are inadequate to describe flow and transport behavior in the vicinity of the water table. We suggest replacing the concept of the CF with the concept of a partially saturated fringe, which involves multiphase transport in the immediate vicinity of (both above and below) the water table.

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Section: Flow Within and Across The Capillary Fringementioning

confidence: 99%

Impact of the Capillary Fringe on Local Flow, Chemical Migration, and Microbiology

Berkowitz¹,

Silliman²,

Dunn³

2004

Vadose Zone Journal

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“…Apart from the appropriate rainfall characteristics, certain combinations of soil and aquifer materials linked with slope type (convex or concave) and angle may also determine the magnitude and therefore the importance of this mechanism (if plausible). In terms of soil texture, the disturbed site of Abdul and Gillham (1989) and Jayatilaka et al (1996b) consisted of a shallow sandy aquifer with low relief (4°-9°) and was grass covered. Youngs et al (1996) demonstrated the capillary-fringe effect for the specialized case of ponded infiltration from a circular pond into a silt loam overlying an artesian, very permeable substratum of sandy material.…”

Section: End-member Mixing Analysismentioning

confidence: 99%

SELECTED CHALLENGES IN RUNOFF GENERATION RESEARCH IN FORESTS FROM THE HILLSLOPE TO HEADWATER DRAINAGE BASIN SCALE¹

Bonell

1998

J American Water Resour Assoc

132

112

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When faced with practical forest land management issues such as the impacts of logging or forest conversion to other land uses, planners ideally require a comprehensive understanding of within drainage basin hydrological processes to determine the most vulnerable areas to increased storm runoff and erosion. Land managers in particular need to know the source areas and magnitude of inputs to the storm hydrograph, in terms of water quantity, sediment and solute transport; and the routing of such hydrographs from headwater to larger drainage basins. The latter includes an overall assessment at various scales of the impacts of forest disturbance and conversion on the water balance. This paper will focus on runoff generation in terms of identifying the various pathways and source areas. Such aspects will be linked with the need for a more comprehensive effort towards the field testing of so‐called ‘physically based’ models of runoff generation. Some of the controversial issues arising from the difficulties in reconciling results from hydrochemical investigations with complementary hydrometric studies will be highlighted. Subsequently, attention will be given to topographic‐wetness models, which have promising applications in forestland management. In addition, alternative simple models for application at the catchment scale will be assessed. The latter is in recognition that at smaller scales, heterogeneity both in time and space of soil hydraulic properties demand a greater number of parameters in modelling. Such considerations can even prove an obstacle in terms of the confident application of ‘physically based’ models.

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“…Several models have been developed from this concept which use a probability distribution of soil moisture including the ARNO model (Todini, 1996;Zhao, 1984; Moore and Clarke, 1981) or the use of a topographic index, as in TOPMODEL (Beven and Kirkby, 1979;Beven et al, 1984). Jayatilaka et. al.…”

Section: Introductionmentioning

confidence: 99%

LARGE AREA HYDROLOGIC MODELING AND ASSESSMENT PART I: MODEL DEVELOPMENT¹

Arnold¹,

Srinivasan²,

Muttiah³

et al. 1998

J American Water Resour Assoc

6,778

4,029

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A conceptual, continuous time model called SWAT (Soil and Water Assessment Tool) was developed to assist water resource managers in assessing the impact of management on water supplies and nonpoint source pollution in watersheds and large river basins. The model is currently being utilized in several large area projects by EPA, NOAA, NRCS and others to estimate the off‐site impacts of climate and management on water use, non‐point source loadings, and pesticide contamination. Model development, operation, limitations, and assumptions are discussed and components of the model are described. In Part II, a GIS input/output interface is presented along with model validation on three basins within the Upper Trinity basin in Texas.

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A deterministic-empirical model of the effect of the capillary fringe on near-stream area runoff 2. Testing and application

Cited by 14 publications

References 6 publications

Impact of the Capillary Fringe on Local Flow, Chemical Migration, and Microbiology

Impact of the Capillary Fringe on Local Flow, Chemical Migration, and Microbiology

SELECTED CHALLENGES IN RUNOFF GENERATION RESEARCH IN FORESTS FROM THE HILLSLOPE TO HEADWATER DRAINAGE BASIN SCALE¹

LARGE AREA HYDROLOGIC MODELING AND ASSESSMENT PART I: MODEL DEVELOPMENT¹

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A deterministic-empirical model of the effect of the capillary fringe on near-stream area runoff 2. Testing and application

Cited by 14 publications

References 6 publications

Impact of the Capillary Fringe on Local Flow, Chemical Migration, and Microbiology

Impact of the Capillary Fringe on Local Flow, Chemical Migration, and Microbiology

SELECTED CHALLENGES IN RUNOFF GENERATION RESEARCH IN FORESTS FROM THE HILLSLOPE TO HEADWATER DRAINAGE BASIN SCALE1

LARGE AREA HYDROLOGIC MODELING AND ASSESSMENT PART I: MODEL DEVELOPMENT1

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Product

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About

SELECTED CHALLENGES IN RUNOFF GENERATION RESEARCH IN FORESTS FROM THE HILLSLOPE TO HEADWATER DRAINAGE BASIN SCALE¹

LARGE AREA HYDROLOGIC MODELING AND ASSESSMENT PART I: MODEL DEVELOPMENT¹