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Soil Bulk Density Effects On Runoff Estimation, Colton Pugh
Soil Bulk Density Effects On Runoff Estimation, Colton Pugh
Theses and Dissertations--Biosystems and Agricultural Engineering
Urbanization has long been a major factor in the hydrology of surrounding areas. Engineers are commonly tasked with mitigating the extra runoff that urbanization brings with it. The NRCS Curve Number (CN) method is a commonly-used approach to predicting the amount of runoff that will be experienced from a given area. However, this method is known to be highly simplified in model of the processes involved. This study focused on determining the relationships between soil bulk density, simulated rainfall events, hydrologic soil group (HSG) and runoff estimation (specifically via the NRCS CN method). It was determined that soil bulk density …
Effectiveness Of Biochar Addition In Reducing Concentrations Of Selected Nutrients And Bacteria In Runoff, Rachel Williams
Effectiveness Of Biochar Addition In Reducing Concentrations Of Selected Nutrients And Bacteria In Runoff, Rachel Williams
Theses and Dissertations--Biosystems and Agricultural Engineering
Land application and storage of horse manure and municipal sludge can increase nutrient and bacteria concentrations in runoff. Biochar increases soil nutrient retention when used as a soil amendment. The objectives of this study were to determine if biochar, when mixed with horse manure or sludge, affects runoff concentrations of total Kjehldahl nitrogen (TKN), ammonia-nitrogen (NH3-N), nitrate (NO3-N), total phosphorus (TP), dissolved phosphorus (DP), total suspended solids (TSS), chemical oxygen demand (COD), and fecal coliforms (FC). Horse manure and sludge were applied to 2.4 x 6.1 m fescue plots (six each), with three plots of each material amended with 5-8% …
Evaluating Sampling Strategies For Rainfall Simulation Studies And Surface Transport Of Antibiotics From Swine Manure Applied To Fescue Plots, Holly K. Enlow
Evaluating Sampling Strategies For Rainfall Simulation Studies And Surface Transport Of Antibiotics From Swine Manure Applied To Fescue Plots, Holly K. Enlow
Theses and Dissertations--Biosystems and Agricultural Engineering
Antibiotics are commonly used in animal agriculture to treat and prevent diseases and promote growth. Unfortunately, large amounts of antibiotics are not metabolized, but instead are excreted in urine and feces. Rainfall simulation studies were used to investigate the transport of the antibiotic oxytetracycline and various constituents in runoff and the ability of alum to reduce pollutant transport. Runoff samples were collected at several points during the simulated storm event from each of four treatments: control (C), manure only (M), manure and antibiotics (MA), and manure, antibiotics and alum (MAA). Flow-weighted composite samples were created and compared to the flow …