Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Thomas J. Grizzard"'
Publikováno v:
Science of The Total Environment. 673:44-53
The Occoquan Reservoir is part of an indirect potable reuse system where a water reclamation plant (WRP) discharges a nitrified product water to prevent the onset of anaerobic conditions in the bottom sediments during the summer months. The elongated
Publikováno v:
Water Research. 110:288-296
Mercury bioaccumulation in aquatic biota poses a widespread threat to human and environmental health. Methylmercury (MeHg), the toxic form of mercury, tends to build up under anaerobic conditions in the profundal zones of lakes. In this study we perf
Publikováno v:
Journal of Hydrology. 540:1066-1077
Pre-development conditions are an easily understood state to which watershed nonpoint nutrient reduction targets may be referenced. Using the pre-development baseline, a “developed-excess” measure may be computed for changes due to anthropogenic
Autor:
Frank M. Wilhelm, Thomas J. Grizzard, David Austin, David A. Matthews, Ricardi Duvil, Marc W. Beutel, Alexander J. Horne, Seyoum Yami Gebremariam, Francisco J. Cubas
Publikováno v:
Critical Reviews in Environmental Science and Technology. :1-28
Nitrate is a significant water pollutant with potential environmental impacts ranging from eutrophication to health risks to infants. But under certain circumstances nitrate may enhance water quality through a number of mechanisms, including enhancin
Publikováno v:
Journal of Water Resources Planning and Management. 144
Changes in climate and land use are two primary drivers of hydrologic adjustment. This study analyzes 40 years of water resources data for 10 watersheds in the Washington, DC metropolitan a...
Publikováno v:
Journal of Hydroinformatics. 17:874-890
An environmental decision support system (EDSS) was designed for the Occoquan system in Northern Virginia, USA. This EDSS is available through the internet using web-browsers, and enables stakeholders to interact with complexly-linked water resources
Publikováno v:
Ecological Engineering. 78:15-26
Nonpoint source pollution from urban areas has been identified as a leading contributor to impaired water quality. Floating treatment wetlands (FTWs) are cultivated plants growing on floating mats in open water. FTWs can be used to remove pollutants
Publikováno v:
Water Resources Research. 49:7698-7710
[1] Fluvial loads for total nitrogen, total oxidized nitrogen, total phosphorus, orthophosphate phosphorus, and total suspended solids were estimated for three watersheds of different sizes using a regression-based method and compared with loads comp
Publikováno v:
Environmental monitoring and assessment. 189(6)
This paper describes the performance of a retrofitted stormwater retention pond (Ashby Pond) in Northern Virginia, USA. Retrofitting is a common practice which involves modifying existing structures and/or urban landscapes to improve water quality tr
Publikováno v:
Journal of Hydrology. 345:167-183
Summary Runoff models such as HSPF and reservoir models such as CE-QUAL-W2 are used to model water quality in watersheds. Most often, the models are independently calibrated to observed data. While this approach can achieve good calibration, it does