Denitrification is an important process in aquatic sediments, but its role has not been assessed in the N mass balance of upper-Midwestern (USA) reservoirs that receive large agricultural riverine N inputs. We used a 4400-ha reservoir to determine the role of denitrification in the N mass balance and effectiveness in reducing downstream transport of NO(3-)N. Sediment denitrification was (1) mea...

The CE-QUAL-W2 model has been selected as a tool for use in water quality management studies of the Occoquan Reservoir. In order for the model to achieve its best possible predictive capability, additional quantitative information on denitrification rates in the reservoir was required. A microcosm operating protocol was developed to obtain such information and also to enhance the understanding ...

the objectives of this study are to investigate chromosomal aberrations of snakehead fish in a leachate-affected reservoir located 100 meters from a municipal landfill which compared to non-affected reservoir. three snakehead fish were collected and chromosomal aberrations were studied using kidney tissue. lead and mercury were measured in water, sediment and snakehead fish from the affected re...

The use of art ificial neural network (ANN)modeling for prediction and forecast ing variables in water resources engineering are being increasing rapidly Infrastructural applicat ions of ANN in terms of selection of inputs, architecture of networks, training algorithms, and selection of training parameters indifferent types of neural networks used in water resources engineering have been report...

Monitoring the water quality of recreational beaches is only one step toward understanding microbial contamination -- the primary cause of beach closings. The surf zone sediment reservoir is typically overlooked and may also be important. This study involved monitoring the fecal indicator bacteria (FIB) levels in water and sediment at three ocean beaches (two exposed and one enclosed) during a ...

Urban waterways represent a natural reservoir of antibiotic resistance which may provide a source of transferable genetic elements to human commensal bacteria and pathogens. The objective of this study was to evaluate antibiotic resistance of Escherichia coli isolated from the urban waterways of Milwaukee, WI compared to those from Milwaukee sewage and a clinical setting in Milwaukee. Antibioti...

The paper examines sediment yield and its response to catchment disturbance and environmental variables in the Upper Ž . Yangtze basin, where the attention of environmentalists has been drawn to the Three Gorges Project TGP . Information about the source and conveyance of sediment from the catchment area to the Three Gorges Reservoir has implications for management strategies. Methodologies for...

Dzialowski, A.R., S.H. Wang, N.C. Lim, J.H. Beury and D.G. Huggins. 2008. Effects of sediment resuspension on algal biomass and nutrient concentrations in reservoirs of the Central Plains. Lake Reserv. Manage. 24:313-320. Historically, lake and reservoir management has focused on controlling external nutrient loading. However, it is becoming increasingly clear that internal mechanisms, such as ...