A Mobile Infiltrometer for Use on Rangeland

Blackburn, W. H.; Meeuwig, Richard O.; Skau, C.M.

doi:10.2307/3896835

Cited by 37 publications

(24 citation statements)

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“…Nevertheless, this is an important aspect of rain viewed as a point-process at small spatial scales (Uijlenhoet and Sempere Torres, 2006) that deserves wider attention, especially when simulated rain is used in erosion experiments. Blackburn et al (1974) used a drip-formers density of about 1494 m 2 in their mobile infiltrometer, but the rate at which each dripformer released a water drop was not reported, so that the drop impact frequency cannot be estimated.…”

Section: The Water Dropsmentioning

confidence: 99%

Intra‐storm evaporation as a component of canopy interception loss in dryland shrubs: observations from Fowlers Gap, Australia

Dunkerley

2007

Hydrological Processes

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Abstract:Interception losses from the canopies of dryland plant taxa remain poorly understood, especially the relative contributions of intra-storm and post-storm evaporative losses. Employing a new measuring apparatus, this study uses low-intensity simulated rain, matched to the properties of local rain, to explore interception processes in bluebush shrubs at an Australian dryland site. Five shrub specimens were exposed to simulated rain for 60-90 min. Experiments were repeated at three rainfall intensities (10, 15, and 20 mm h 1 ). Canopy evaporation was found from the difference between the flux of water delivered to the shrub and the flux of throughfall, once equilibrium had been established. The results show that evaporation from the wet foliage during rain proceeds at an average rate of 3Ð6 mm h 1 . This figure is for relatively cool spring-season conditions; evaporation rates in hot summer conditions would be larger. Intra-storm evaporation is shown to exceed post-rain evaporation from interception storage on the shrubs, and this differentiates dryland shrub interception processes from those of the betterstudied wet forest environment. Implications of the high dryland shrub canopy evaporation rates for aspects of dryland ecology are highlighted.

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Section: The Water Dropsmentioning

confidence: 99%

Intra‐storm evaporation as a component of canopy interception loss in dryland shrubs: observations from Fowlers Gap, Australia

Dunkerley

2007

Hydrological Processes

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“…Crawley (1982) measured surface infiltration rates on these watersheds using a drip-type rainfall simulator (Blackburn et al, 1974), and found that there were no statistically significant differences in mean twenty minute infiltration rates (13Ð0, 12Ð5 and 15Ð9 cm hr 1 for the sheared, chopped and untreated watersheds, respectively) when soils were dry. Twenty minute infiltration rates were significantly lower on clearcut watersheds when soils were at field capacity (10Ð0, 9Ð4 and 16Ð1 cm hr 1 for the sheared, chopped and untreated watersheds, respectively).…”

Section: Soil Compactionmentioning

confidence: 99%

Storm runoff and sediment losses from forest clearcutting and stand re‐establishment with best management practices in East Texas, USA

McBroom

Beasley

Chang

et al. 2007

Hydrological Processes

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Abstract:Nine small (2Ð5 ha) and four large (70-135 ha) watersheds were instrumented in 1999 to evaluate the effects of intensive silvicultural practices with best management practices (BMPs) on runoff and stream water quality in the Western Gulf Coastal Plain of East Texas, USA. Two treatments were implemented in 2002: a conventional treatment with clearcutting and herbicide site preparation, and an intensive treatment that added subsoiling, fertilization and a release herbicide application. Watershed effects were compared with results from a previously conducted study on the same watersheds in 1981, in which two combinations of harvesting and mechanical site preparation without BMPs were evaluated. Due to the reduction in evapotranspirational demand, total storm runoff increased on all six treated small watersheds following harvest by 0Ð94 to 13Ð73 cm in 2003. Runoff increases were not statistically significant on the treated large watersheds. Total first-year sediment loss was significantly greater on two of the conventional and one of the intensive small watersheds. The greatest first-year increase was 540Ð1 kg ha 1 , only one-fifth of that observed on these watersheds from shearing and windrowing without BMPs in 1981. First-year sediment loss was significantly greater on the intensive large watershed following harvest, but not on the conventional large watershed. These data suggest that BMPs are very effective in reducing potential water quality impacts from intensive silvicultural practices.

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“…Estos inconvenientes, unidos a las dificultades en el transporte, han agudizado el ingenio de los investigadores, llegándose a construir simuladores que son transportables y utilizables incluso por un operador (McQueen, 1963;Blackburn et al, 1974), aunque en general son de manejo más complicado que los simuladores pulverizadores.…”

Section: 1 Simuladores Goteadoresunclassified

Simuladores de lluvia y su aplicación a la Geomorfología : Estado de la cuestión

Cerdà

2013

CIG

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A Mobile Infiltrometer for Use on Rangeland

Cited by 37 publications

References 0 publications

Intra‐storm evaporation as a component of canopy interception loss in dryland shrubs: observations from Fowlers Gap, Australia

Intra‐storm evaporation as a component of canopy interception loss in dryland shrubs: observations from Fowlers Gap, Australia

Storm runoff and sediment losses from forest clearcutting and stand re‐establishment with best management practices in East Texas, USA

Simuladores de lluvia y su aplicación a la Geomorfología : Estado de la cuestión

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