Runoff characteristics of pipeflow and effects of pipeflow on rainfall-runoff phenomena in a mountainous watershed

Uchida, Tatsuo; Kosugi, Ken’ichirou; Mizuyama, Takahisa

doi:10.1016/s0022-1694(99)00090-6

Cited by 110 publications

(113 citation statements)

References 24 publications

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“…This subsurface erosion is thought to be important for the modification and maintenance of preferential flow paths (Uchida et al, 1999). In steep forested headwater catchments, direct connectivity of hillslopes to stream channels often facilitates the subsurface transport of sediments directly into streams.…”

Section: Modification Of Preferential Flow Pathsmentioning

confidence: 99%

“…Some steep, forested hillslopes have been reported to have large preferential flow paths, but it was not known how far upslope they extended (Roberge and Plamondon, 1987;Tsukamoto and Ohta, 1988;Kitahara, 1993;Uchida et al, 1999). Even though preferential flow paths are usually short and discontinuous, hillslopes produce fast tracer velocities and rapid subsurface flow responses (Peters et al, 1995;Tani,936 A. E. Anderson et al: Excavation of a lateral preferential flow network and subsurface flow responses have led to the idea of a preferential flow network, which describes a series of hydraulically connected preferential flow paths that appear to be physically discontinuous.…”

Section: Introductionmentioning

confidence: 99%

“…Erosion of preferential flow paths is likely to increase their flow capacity, whereas deposition will decrease their capacity, resulting in a potential increase in local pore pressure. Modification of preferential flow paths is affected by soil cohesion (Uchida et al, 1999) and by the volume of water supplied to the features, which is related to the contributing area (Freer et al, 2002). We would expect that higher contributing areas should correspond to preferential flow networks with larger and more connected features especially in concave topography.…”

Section: Introductionmentioning

confidence: 99%

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Dye staining and excavation of a lateral preferential flow network

Anderson

Weiler²,

Alila

et al. 2009

Hydrol. Earth Syst. Sci.

107

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Abstract. Preferential flow paths have been found to be important for runoff generation, solute transport, and slope stability in many areas around the world. Although many studies have identified the particular characteristics of individual features and measured the runoff generation and solute transport within hillslopes, very few studies have determined how individual features are hydraulically connected at a hillslope scale. In this study, we used dye staining and excavation to determine the morphology and spatial pattern of a preferential flow network over a large scale (30 m). We explore the feasibility of extending small-scale dye staining techniques to the hillslope scale. We determine the lateral preferential flow paths that are active during the steady-state flow conditions and their interaction with the surrounding soil matrix. We also calculate the velocities of the flow through each cross-section of the hillslope and compare them to hillslope scale applied tracer measurements. Finally, we investigate the relationship between the contributing area and the characteristics of the preferential flow paths. The experiment revealed that larger contributing areas coincided with highly developed and hydraulically connected preferential flow paths that had flow with little interaction with the surrounding soil matrix. We found evidence of subsurface erosion and deposition of soil and organic material laterally and vertically within the soil. These results are important because they add to the understanding of the runoff generation, solute transport, and slope stability of preferential flow-dominated hillslopes.

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Section: Modification Of Preferential Flow Pathsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dye staining and excavation of a lateral preferential flow network

Anderson

Weiler²,

Alila

et al. 2009

Hydrol. Earth Syst. Sci.

107

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“…Intensive research within experimental basins in temperate climates indicate that natural soil piping can be a dominant pathway for routing rainfall to rivers Uchida et al, 1999;Jones and Connelly, 2002). These hydrological features can be defined as water conduits that are typically several centimetres or tens of centimetres in diameter and their networks can extend several metres or tens of metres within hillslopes.…”

Section: Introductionmentioning

confidence: 99%

Soil pipe distribution and hydrological functioning within the humid tropics: a synthesis

Chappell

2010

Hydrological Processes

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Abstract:Some of the most responsive runoff systems in the world are found within the humid tropics. These runoff responses are likely to be affected by the presence of natural pipes within the soil. This study provides a synthesis of the hydrological aspects of these phenomena within the humid tropics. Of the studies reporting the presence of soil piping within the humid tropics, most are associated with Ultisol soils, and, locally, most pipe outlets are observed on the lower sections of hillslopes. While the drainage role of pipes has been observed (providing faster and slower components of stream hydrographs), the mechanism of their recharge remains less clear. In part, this is because their spatial extent is poorly mapped within the hillslopes of the humid tropics. Further studies quantifying the length and recharge of soil pipe networks within the humid tropics are needed.

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“…The influence of larger macropores (pipes) on runoff generation was investigated by a number of authors in different areas (Jones et al, 2002;Uchida, 2000;Zhu et al, 2002;Putty and Prasad, 2000;etc.). Some of them observed high contributions of water to storm runoff transferred by Table 1. pipes, especially in forested areas.…”

Section: Introductionmentioning

confidence: 99%

Formation of runoff at the hillslope scale during intense precipitation

Scherrer

Naef

Faeh

et al. 2007

Hydrol. Earth Syst. Sci.

118

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Abstract. On 60 m 2 hillslope plots, at 18 mainly grassland locations in Switzerland rain was applied at rates of 50-100 mm/h for between 3 and 6 h. The generated flows were measured, including overland flow, near surface and subsurface flow 0.5-1.3 m below the surface. At some locations less than 2% of the rain flowed down the slope either on or below the surface, whereas at some others more than 90% of the rain ran off. At the majority of sites most runoff was overland flow, though at a few sites subsurface flow, usually via macropores was dominant. Data collected during each of 48 high intensity sprinkling experiments were used to distinguish, which processes were dominant in each experiment. Which dominant and subsidiary processes occurred depended on interactions between infiltration rate, change in soil water storage and drainage of the soil water. These attributes were often not directly linked to parameters usually considered important like vegetation, slope, soil clay content and antecedent soil moisture. Considering the structure of the soil in combination with these attributes, process determination was in many cases fairly straightforward, indicating the possibility of reliably predicting runoff processes at a site. However, at some sites, effects occurred that were not easily recognizable and led to surprising results.

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Runoff characteristics of pipeflow and effects of pipeflow on rainfall-runoff phenomena in a mountainous watershed

Cited by 110 publications

References 24 publications

Dye staining and excavation of a lateral preferential flow network

Dye staining and excavation of a lateral preferential flow network

Soil pipe distribution and hydrological functioning within the humid tropics: a synthesis

Formation of runoff at the hillslope scale during intense precipitation

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