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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 180 for “"surface runoff"”.
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Surface Runoff Quality in Grasslands Fertilized with Broiler Litter
Surface application of broiler litter to grasslands can increase concentrations of ammonium (NH₄+-N) and dissolved reactive phosphorus (DRP) in surface runoff. It is not known, however, for how long after broiler litter applications that NH₄+-N and DRP concentrations remain elevated. Five 0.75-ha, …
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A Laboratory and Analytical Study of Surface Runoff Under Moving Rainstorms
Made available in DSpace on 2014-12-08T23:57:03Z (GMT). No. of bitstreams: 1 6812159.pdf: 3577478 bytes, checksum: 1ef8103df569e41351eac51efd3ebdec (MD5) Previous issue date: 1968
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On the Relationship Between Rainfall and Surface Runoff On Laboratory Watersheds
Made available in DSpace on 2014-12-08T23:57:24Z (GMT). No. of bitstreams: 1 7020923.pdf: 4580079 bytes, checksum: 99ee0042f201b4f5c9cc1eb8c5e94936 (MD5) Previous issue date: 1970
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Availability and Surface Runoff of Phosphorus from Compost Amended Mid-Atlantic Soils
… the risk for P enrichment of agricultural runoff. Transport of these residuals to areas where P may be efficiently utilized is necessary to reduce the threat to water quality. Composting can improve biosolids and manure handling characteristics to make their transportation more feasible; …
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Experimental Investigation of the Effects of Rainstorm and Watershed Characteristics on Surface Runoff
Made available in DSpace on 2014-12-10T22:22:14Z (GMT). No. of bitstreams: 1 7500430.pdf: 5699023 bytes, checksum: 1f547ee1c8ac6b8027f209c2bdefff62 (MD5) Previous issue date: 1974
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An evaluation of a data-driven approach to regional scale surface runoff modelling
Modelling surface runoff can be beneficial to operations within many fields, such as agriculture planning, flood and drought risk assessment, and water resource management. In this study, we built a data-driven model that can reproduce monthly surface runoff at a 4-km grid network covering 13 …
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A Basic Study of the Rainfall Excess-Surface Runoff Relationship in A Basin System
Made available in DSpace on 2014-12-08T23:56:10Z (GMT). No. of bitstreams: 1 6412535.pdf: 8330441 bytes, checksum: 482a78c54089f230a5317745f14d4334 (MD5) Previous issue date: 1964
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Modeling phosphorus transport in surface runoff from agricultural watersheds for nonpoint source pollution assessment
… for the desorption of phosphorus from the soil surface into surface runoff. The sediment-bound phosphorus is modeled as a function of the specific surface area of the soil and transported sediment. The equilibrium between the soluble and sediment-bound phosphorus is modeled using a Langmuir …
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Nitrogen Regime Influence on Nutrient and Sediment Surface Runoff During Vegetative Establishment of Bermudagrass
… thus making the possibility of offsite surface runoff N events more likely. Two experiments were conducted in 2000 and 2001 where sprigs were established at 2, 4, 6, 8, and 10 weeks prior to applying simulated rainfall (WPRS) following N fertilization rates of the ISP or a lower initial …
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A comparative evaluation of surface runoff models and methods on small developing watersheds in Northern Virginia
… to simulate the effects of urbanization on runoff processes. The engineer who must use these models and methods needs to be aware of their capabilities and performance. Many of the models assume that calibration will take place to improve the final results. Unfortunately, this is not the …
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The performance of a field scale biofiltration cells in reducing nutrient rich surface runoff from an informal settlement in South Africa
… of NbS in treating and reducing nutrient rich surface runoff with associated sediments that originates from informal settlements. This thesis contributes to the application and understanding of the novel NbS scientific body of literature on water treatment, firstly by utilising field scale …
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Characteristics of runoff from three watersheds in Montgomery County, Virginia
The project included surface runoff and groundwater drainage measurements in addition to determinations of physical and chemical characteristics from three watersheds located within the same drainage basin in Montgomery County, Virginia. Watershed number 1 included 80 acres of heavily forested …
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Characterization of pathogen transport in overland flow
… transport kinetics with bare and vegetated surface conditions. Surface runoff, soil cores, and near-surface runoff are each analyzed for infective C. parvum oocysts and infective rotavirus particles using cell-culture infectivity assays. Results show that vegetation reduces the recovery of …
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Simulation of phosphorus transport in vegetative filter strips
… filter strips (VFS) in removing phosphorus from surface runoff. Dissolved and particulate nutrients were treated separately due to differing transport and removal mechanisms. Nutrient transport in VFS appears to be a function of runoff rate, concentration and size distribution of suspended …
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Sediment Delivery from Reopened Forest Roads at Stream Crossings in the Virginia Piedmont Physiographic Region, USA
Efforts to control surface runoff and erosion from forest roads at stream crossings are critical for the protection of aquatic ecosystems in forests. In this research, annual and event-based sediment delivery rates were estimated for reopened legacy roads at forest stream crossings in the Virginia …
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Il ruolo della vegetazione sui processi idrologici di ecosistemi Mediterranei in condizioni idriche limitanti
… processes (e.g., evapotranspiration and surface runoff) of the hydrologic balance have been studied extensively throughout the use of modern techniques for field site monitoring and the support of numerical models. In the first part of this work the evapotranspiration process in a typical …
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Flow and transport processes as affected by tillage management under monsoonal conditions in South Korea
… was investigated. On hillslopes, we monitored surface and subsurface flow processes in four plastic mulched potato fields using a network of tensiometers, FDR sensors, runoff collectors and flow dividers as well as Brilliant Blue FCF tracer experiments. The obtained datasets were used to …
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Flood risk assessment using multi-sensor remote sensing, geographic information system, 2D hydraulic and machine learning based models
… a model was proposed to monitor changes in surface runoff and forecast future surface runoff on the basis of land use/land cover (LULC) and precipitation factors because the effects of precipitation and LULC dynamics have directly affected surface runoff and flooding events. Land …
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Impact of Manure Land Management Practices on Manure Borne Antibiotic Resistant Elements (AREs) in Agroecosystems
… manure application techniques can reduce surface runoff of other contaminants such as excess N and P, pesticides, and hormones, that can impact water quality. Conventional tillage practices in the U.S. has reduced or stopped, making subsurface injection of manure a promising option when …
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Development of a Method to Compare Storm Water Best Management Practices at The University of Toledo
Storm water runoff has become a concern in urban environments. Urban environments have a very large percentage of impermeable area, creating large amounts of surface runoff. This surface runoff carries contaminants (nutrients, sediments, pathogens, oils and greases) into storm water collection …
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