Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"rainfall simulator"”.
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A study of storm losses using a laboratory catchment under computer-controlled simulated rainfall
… development of a laboratory catchment and rainfall simulator is described. The rainfall simulator enabled the reproduction of rainfall of any intensity between 0 and 120mm/hr, with properties similar to those of natural rainfall. The rainfall simulator was subsequently linked to a process …
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Effects of watering interval, planting depth and soil crusting on ermegence and seedling establishment of sorghum (sorghum bicolor (L.) moench)
… and soil type/water drop size delivered from a rainfall simulator were evaluated. Following the addition of water through the rainfall simulator, soil samples were prepared into thin sections that were examined under a microscope to determine the impact of water drops on the soil. Sorghum …
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Effects of watering interval, planting depth and soil crusting on ermegence and seedling establishment of sorghum (sorghum bicolor (L.) moench)
… and soil type/water drop size delivered from a rainfall simulator were evaluated. Following the addition of water through the rainfall simulator, soil samples were prepared into thin sections that were examined under a microscope to determine the impact of water drops on the soil. Sorghum …
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Hydrologic impacts due to application of dust suppressants
… were investigated in the field, using a rainfall simulator on plots (which represented disturbed land surfaces) treated with 11 different dust suppressants. Results of the study indicate a general increase in the runoff coefficient as well as an increase in the runoff rates and volume of …
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The determination of surface mine soil erodibility factors for two soils in southern West Virginia
A grid type portable rainfall simulator, developed at Virginia Tech from support by the Office of Surface Mining, Department of Interior under Grant NO. G5114009, was used to apply 2.3 inch per hour “storms” to three replicated plots to determine surface mine soil erodibility factors for two …
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Evaluation of check dams for sediment control on disturbed land surfaces
… of Illinois South Farms and one under a rainfall simulator. Many climactic and soil factors were measured, although the main focus was on runoff and sediment removal. The investigation revealed that all structures effectively reduced the amount of sediment lost; all except the compost …
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Hydrological studies of a laboratory catchment area under rainfall simulation
… the basic nature of hydrological parameters of rainfall, infiltration and surface runoff. Experimental work using a specially designed laboratory catchment and a rainfall simulator is described. This equipment is regarded as a useful contribution to the study of hydrology and its description is …
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Development of a research and demonstration facility for the evaluation of stormwater runoff, erosion control, and sediment control best management practices
… runoff collection structures, and a portable rainfall simulator were designed and calibrated to evaluate hillslope erosion control on the berm. A demonstration of three different check dam series was performed in the channels, and various flow conditions used to explore evaluation methodology. …
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Il ruolo della vegetazione sui processi idrologici di ecosistemi Mediterranei in condizioni idriche limitanti
… management. For this purpose a 4 m by 4 m rainfall simulator was designed, constructed, and tested as the first stage of this research. The rainfall simulator consisted of four independent lines of low-cost pressure washing nozzles operated at a pressure of 80 mbar, with the number of …
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Variability of soil erodibility: its relationship to topography and soil properties in cultivated landscape
… This hypothesis was tested by using a portable rainfall simulator to measure the relative soil erodibility at five slope positions along eleven slope transects on fallow agricultural land in hummocky terrain. Soil erodibility variations among the five slope units were examined for significant …
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Processes Governing Rapid Recharge Events in a Shallow Fractured Rock Aquifer Having Minimal Overburden Cover
… of 2012 using 18 different monitoring wells. Rainfall and weather data were also collected. Infiltration experiments were performed in the summer period using a 10 m by 10 m rainfall simulator. A ground penetrating radar (GPR) survey was conducted around a piezometer to determine depth to …
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Scoping of Presence and Impacts of Tyre Wear Particles on Soil Systems
… formation, as well as for erosion rates using a rainfall simulator. In ecotoxicological assessments, Eisenia fetida, a key species for agricultural production (Jing et al., 2023), were exposed to TWPs and examined their behaviours when contacting to the particles. Then, their bodies were …
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Modeling nitrogen transport with the ANSWERS model
… model was verified using water quality data from rainfall simulator plot studies conducted on the Prices Fork Research Farm in Blacksburg, Virginia. The four plots were 5.5 m wide by 18.3 m long with average slopes ranging from 6.2 to 11 percent. Two of the plots were tilled conventionally, and …
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The effects of grass and rainfall pattern on the matric suction of acidic soil slopes
… were used to investigate matric suction due to rainfall by applying hydromulching on sloping ground. Despite numerous efforts in the past to investigate the influence of rainfall infiltration on slope stability, there was limited research on the effect of both rainfall infiltration and …
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Characterization of pathogen transport in overland flow
… soils, in terms of soil texture. A 20-minute rainfall event is produced using a small-scale (1.07 m x 0.66 m) laboratory rainfall simulator over a soil box measuring 0.67 m x 0.33 m. Each soil type is tested for pathogen transport kinetics with bare and vegetated surface conditions. Surface …
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A computer simulation model for predicting pesticide losses from agricultural lands
… (Pesticide Losses In Erosion and Runoff Simulator, PLIERS) was developed. PLIERS accounts for pesticide losses by degradation and volatilization, the washoff of pesticides from plant canopy and surface residue, the adsorption and desorption of pesticides to and from soil particles, and …
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Effects of Rain and Simulated Rain on Deoxynivalenol Levels in Grain and Chaff of Winter Wheat with Fusarium Head Blight
… to protect plots from rain and misting, and a rainfall simulator to apply simulated rain. A critical component of these experiments was to have groups of spikes with similar levels of DON at the beginning of experiments, and methods were developed to make groups as similar as possible and to …
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Modeling phosphorus transport in surface runoff from agricultural watersheds for nonpoint source pollution assessment
… verified using water quality data collected from rainfall simulator plot studies conducted on the Prices Fork Research Farm in Blacksburg, Virginia. The plots consisted of four 5.5 m wide by 18.3 m long strips with average slopes ranging from 6.2 to 11 percent. Two of the plots were tilled …
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Using Conservative and Biological Tracers to Better Understand the Transport of Agricultural Contaminants from Soil Water through the Epikarstic Zone
… The field design used here, utilizing a rainfall simulator, allowed control of the input of precipitation and tracers to understand more about the movement of stormwater infiltrating the soil and the differences in transport of solute particles and bacteria in the epikarstic zone. Two …
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Development of novel lanthanide based particle tracers for rapid monitoring of soil erosion.
… one season (approximately 3 months). A prototype rainfall simulator was developed, designed to simulate the kinetic energy of raindrops on the surface of the soil and used during a series of rainfall simulation experiments. These simulations were performed at two different rainfall intensities (30 …
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