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Model Evaluation Guidelines for Systematic Quantification of Accuracy in Watershed Simulations
Watershed models are powerful tools for simulating the effect of watershed processes and management on soil and water resources. However, no comprehensive guidance is available to facilitate model… Expand
SWAT: Model Use, Calibration, and Validation
SWAT (Soil and Water Assessment Tool) is a comprehensive, semi-distributed river basin model that requires a large number of input parameters, which complicates model parameterization and… Expand
CUMULATIVE UNCERTAINTY IN MEASURED STREAMFLOW AND WATER QUALITY DATA FOR SMALL WATERSHEDS
The scientific community has not established an adequate understanding of the uncertainty inherent in measured water quality data, which is introduced by four procedural categories: streamflow… Expand
Consideration of measurement uncertainty in the evaluation of goodness-of-fit in hydrologic and water quality modeling
As hydrologic and water quality (H/WQ) models are increasingly used to guide water resource policy, management, and regulation, it is no longer appropriate to disregard uncertainty in model… Expand
Water quality impacts of converting to a poultry litter fertilization strategy.
- R. Harmel, H. Torbert, B. Haggard, R. Haney, M. Dozier
- Environmental Science, Medicine
- Journal of environmental quality
- 1 November 2004
Water quality impacts of conversion to poultry litter fertilization on cultivated and pasture watersheds in the Texas Blackland Prairie were evaluated and demonstrate that a properly managed annual litter application with supplemental N should supply necessary nutrients without detrimental water quality impacts. Expand
Modifying Goodness-of-Fit Indicators to Incorporate Both Measurement and Model Uncertainty in Model Calibration and Validation
Because of numerous practical implications of uncertainty in measured data and model predictions, improved techniques are needed to analyze and understand uncertainty and incorporate it into… Expand
PRACTICAL GUIDANCE FOR DISCHARGE AND WATER QUALITY DATA COLLECTION ON SMALL WATERSHEDS
Many sampling projects have been initiated or modified in recent years to quantify the effects of water quality protection and enhancement programs. Although comprehensive references on the theory… Expand
Field evaluation of three phosphorus indices on new application sites in Texas
ABSTRACT: Phosphorus (P) indices were developed to address nonpoint source P losses from agricultural fields; however, only limited information on P index performance at the field- and… Expand
Soil microbial communities and enzyme activities under various poultry litter application rates.
Investigation of soil microbial communities and several enzyme activities in a Vertisol soil affected by different rates of poultry litter application to pasture and cultivated sites concluded that rates greater than 6.7 Mg ha(-1) provided rapid enhancement of the soil microbial populations and enzymatic activities, they result in P application in excess of crop needs. Expand
Estimating storm discharge and water quality data uncertainty: A software tool for monitoring and modeling applications
- R. Harmel, D. R. Smith, K. King, R. M. Slade
- Environmental Science, Computer Science
- Environ. Model. Softw.
- 1 July 2009
Results of DUET-H/WQ application in several studies indicated that substantial uncertainty can be contributed by each procedural category (discharge measurement, sample collection, sample preservation/storage, laboratory analysis, and data processing and management). Expand