Hydraulic Characteristics of Rills

Gilley, John E.; Kottwitz, Eugene R.; Simanton, J. R.

doi:10.13031/2013.31556

Cited by 148 publications

(17 citation statements)

References 9 publications

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“…Runoff hydrographs obtained from the previous studies, described below, were used to calculate the surface detention values reported in the present investigation. Rill density and rill flow rates were identified during rainfall simulation tests conducted at eleven fallow cropland sites located throughout the eastern U.S. (Gilley et al, 1990). Soils at the sites, which were considered to be of regional or national importance, were selected to cover a broad range of physical, chemical, biological, and mineralogical properties.…”

Section: Data From Previous Studies Used To Calculate Surface Detentionmentioning

confidence: 99%

“…Study Title Citation Experimental Conditions Hydraulic characteristics of rills Gilley et al (1990) Tests conducted on eleven bare tilled soils. Runoff, erosion, and soil quality characteristics of a former Conservation Reserve Program site in southwestern Oklahoma Gilley et al (1997a) Experimental treatments included Old World blue stem, no-till wheat, and conservation-till wheat.…”

Section: Data From Previous Studies Used To Calculate Surface Detentionmentioning

confidence: 99%

“…Rill density and rill flow rates were determined during field rainfall simulation tests conducted at eleven fallow cropland sites located throughout the eastern U.S. (Gilley et al, 1990). Surface detention values ranged from 1.7 mm on a Grenada soil in northern Mississippi to 4.6 mm on a Lewisburg soil in northern Indiana (table 3).…”

Section: Calculated Surface Detention Valuesmentioning

confidence: 99%

“…Surface detention is also influenced by topography because surface runoff is supplied by both rainfall and runoff from adjoining areas. The objective of this study was to quantify surface detention on cropland, rangeland, and Conservation Reserve Program (CRP) areas using runoff hydrographs from previous rainfall simulation studies (Gilley et al, 1990(Gilley et al, , 1996(Gilley et al, , 1997a(Gilley et al, , 1997b(Gilley et al, , 2000Gilley and Eghball, 1998).…”

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Surface Detention on Cropland, Rangeland, and Conservation Reserve Program Areas

Gilley¹

2018

Transactions of the ASABE

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Abstract. One of the factors contributing to overland flow on upland areas is water stored temporarily in a thin sheet on the soil surface as surface detention. This study was conducted to quantify surface detention on selected cropland, rangeland, and Conservation Reserve Program (CRP) sites. Surface detention was determined from the recession portion of runoff hydrographs corresponding with the period when rainfall had ceased but runoff continued. The hydrographs were generated from six previously reported rainfall simulation studies conducted on paired 3.7 m wide × 10.7 m long plots on which approximately 128 mm of rainfall was applied. Surface detention values were found to increase as crop residue or vegetative cover increased. Eleven fallow cropland sites in the eastern U.S. had surface detention values that varied from 1.7 to 4.6 mm. Surface detention on plots in southwestern Oklahoma containing Old World bluestem, no-till wheat, and conservation-till wheat was 9.4, 7.3, and 5.2 mm, respectively. No-till sorghum, tilled sorghum, no-till wheat, and tilled wheat plots in southeast Nebraska had surface detention values of 6.7, 4.5, 6.7, and 4.6 mm, respectively. Mean surface detention on no-till and tilled cropland sites in southwest Iowa containing corn residue was 7.2 and 5.9 mm, respectively. CRP study sites in southwestern Iowa had mean surface detention of 10.8 mm. When data from the six field studies were combined, mean surface detention values for fallow cropland, tilled cropland, no-till cropland, rangeland, and CRP areas were 3.1, 5.0, 6.9, 9.6, and 10.8 mm, respectively. Keywords: Depressional storage, Hydrographs, Hydrologic modeling, Overland flow, Runoff volume, Surface detention.

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Section: Data From Previous Studies Used To Calculate Surface Detentionmentioning

confidence: 99%

Section: Data From Previous Studies Used To Calculate Surface Detentionmentioning

confidence: 99%

Section: Calculated Surface Detention Valuesmentioning

confidence: 99%

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Surface Detention on Cropland, Rangeland, and Conservation Reserve Program Areas

Gilley¹

2018

Transactions of the ASABE

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“…(12) to (14) have been applied to different types of channels: natural rills, ephemeral and permanent gullies, streams and rivers (e.g. Leopold and Maddock, 1953;Leopold and Miller, 1956;Thornes, 1970Thornes, , 1974Graf, 1971;Hamlin and Thornes, 1974;Gilley et al, 1990;Govers, 1992;Foster et al, 1984;Abrahams et al, 1996;Di Stefano et al, 2013) and simulated experiments under controlled laboratory conditions (e.g. Lane and Foster, 1980;Foster et al, 1984;Sidorchuk, 1998;Bennett et al, 2000;Giménez and Govers, 2001).…”

Section: Hydraulic Characterization Of the Gullymentioning

confidence: 99%

Morphometric and hydraulic geometry assessment of a gully in SW Spain

et al. 2016

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Rill hydraulics on a semiarid hillslope, southern Arizona

Abrahams

Parsons

1996

Earth Surf. Process. Landforms

133

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Seventy field experiments were conducted in seven rills located on a semiarid rangeland hillslope underlain by gravelly soils at Walnut Gulch, Arizona. The rills, which are characterized by wide, shallow cross-sections and gravel-covered beds, have mean at-a-station hydraulic geometry exponents of b = 0.33, f = 0.34 and rn = 0.33. Although the differences between these values and typical values of b = 0.30, f = 0.40 and m = 0.30 for cropland rills are not statistically significant, they are thought to be real, as cropland rills often have more rectangular cross-sections and steeper sides than the rangeland rills under study. For rills formed in silty loamy soils, Govers developed an empirical relation between mean flow velocity and discharge. Emphasizing the generality of this relation, he suggested that it may be used as a simple means of routing runoff through rills. He also noted that this relation appeared to be unaffected by either slope or soil materials. The present data represent rills underlain by coarser and somewhat more varied gravel-rich soils. These data do not conform to Govers' relation, and a multiple regression analysis reveals that slope and soil materials, either directly or indirectly through bed roughness, exert almost as much influence on flow velocity as does discharge. Three alternative methods are developed for predicting flow velocity in the rills under study. All three methods give good results with the largest root mean square deviation being 3.115cms-'.

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Hydraulic Characteristics of Rills

Cited by 148 publications

References 9 publications

Surface Detention on Cropland, Rangeland, and Conservation Reserve Program Areas

Surface Detention on Cropland, Rangeland, and Conservation Reserve Program Areas

Morphometric and hydraulic geometry assessment of a gully in SW Spain

Rill hydraulics on a semiarid hillslope, southern Arizona

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