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Showing 1 to 14 of 14 for “"GLEAMS"”.
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Evaluation of GLEAMS considering parameter uncertainty
… to the evaluation of predictions from the GLEAMS nonpoint source pollution model. Assessment of both the procedure and model was made by comparing absolute and relative predictions made with both probabilistic and deterministic procedures. Field data used came from a study of pesticide fate …
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Evaluation of Phosphorus Transport and Transformations in GLEAMS 3.0
… phosphorus (P) transport and transformations in GLEAMS 3.0, a non-point source model that simulates edge-of-field and bottom-of-root-zone loadings of nutrients from climate-soil-management interactions to assess management alternatives. The objectives of this research were to identify the state …
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Nitrogen modeling of potato fields in the Bolivian Andes using GLEAMS
… this study was to assess the suitability of the GLEAMS model as a tool for evaluating fertilization and cropping system practices for potatoes in the Andes of central Bolivia, and make recommendations for the continued development of the model as an analysis tool to improve sustainable crop …
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Modeling Spatial Variability of Field-Scale Solute Transport in the Vadose Zone
… two existing root zone leaching models, Opus and GLEAMS. The accuracy of soil water, bromide and pesticide transport predictions from Opus-SF and GLEAMS-SF was evaluated using field-measured soil water content, bromide and pesticide mass data from a 3.9-ha agricultural field in the Dougherty Plain …
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Modeling Fate and Transport of Nitrogen and Phosphorus in Crop Fields Under Tropical Conditions
… conditions and impact NPS pollution. The GLEAMS model was selected for adaptation. Changes to the model included calculation of potential evapotranspiration (ET); changes in initial and default values of N and P pools, C:N ratio of soil organic matter, and soil P sorption; changes in …
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Tillage effects on leaching and persistence of pesticides in coastal plain soil
… used to validate pesticide transport models, GLEAMS and PRZM. The study was conducted on two 18x27 m plots located in a field that was in the second year of a two-year no-till wheat-beaDs-com rotation. One plot was conventionally tilled using a moldboard plow and a disk harrow before planting …
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Surface and groundwater quality impacts of conservation tillage practices on burley tobacco production systems in Southwest Virginia
… more flumetralin mass in percolated water. The GLEAMS model was used to simulate runoff, nutrient, sediment and pesticide losses from the same three tillage practices evaluated in the field experiment. The model results showed that for runoff volume, TSS, nitrogen, chlorpyrifos and flumetralin …
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The mobility of endosulfan and chlorpyrifos in the soils of the Hex River Valley
… output and the needs of the user. In general, GLEAMS underestimates pesticide mobility and this has been attributed to its inability to simulate: increased solubility of pesticides due to dissolved organic matter; loss of pesticides attached to suspended sediment in percolation water; pesticide …
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Parameter uncertainty in nonpoint source pollution modeling
… continuous NPS pollution model, GLEAMS, indicated parameter uncertainty had important consequences for both absolute predictions and comparative analysis between scenarios. Information on correlations among input variables in Monte Carlo studies is frequently not available, and is …
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Beginnings
… but beautiful just the same as the sunlight gleams through the spaces in the weathered wooden boards. From a distance, a tall figure rises from a hillside. It appears at first to be one of the many silo structures of the old farms. The stack pointing to the sky is surrounded by low stone …
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Simulated effects of agricultural management systems on potential nonpoint source loading of nitrate and pesticides
Long-term CREAMS and GLEAMS model simulations were used to assess significant differences in potential pesticide and nitrate movement to groundwater as affected by several combinations of tillage, cropping, and nutrient and pesticide management practices. The study area is in Richmond County in the …
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Digital inclusion: a fundamental right for every individual’s entry into society case study on inclusive service delivery of the banking sector in Belgium
… holds his older-model phone above his ID, which gleams in the pool of light under a desk lamp. On the phone screen, the camera hunts for focus and a message appears, “Hold still.” A rectangle on the screen flickers between green and grey, repeatng the pattern over and over. Today, the camera is …
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Risk assessment formulation for nitrate leaching
… fields was developed and applied. The GLEAMS (Groundwater Loading Effects of Agricultural Management Practices) (Ver 2.1) model was used to simulate NO₃-N leaching below the root zone for different land application rates of liquid dairy waste for fields in Georgia and Texas. Probability …
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An economic analysis of low-input agriculture as a groundwater protection strategy
… Two non-point simulation models, CREAMS and GLEAMS, were used to estimate the nitrogen and chemical loadings of runoff, groundwater, and sediment; and the soil erosion from each of these scenarios. The model shows that yields, labor requirements, and variable costs, individually have a weak …