Water-quality investigation of the Caney Creek watershed, Northeast Arkansas

The Nomini Creek Watershed/Water Quality monitoring project was initiated in 1985, as part of the Chesapeake Bay Agreement of 1983, to quantify the impacts of agricultural best management practices (BMPs) on improving water quality. The watershed monitoring system was designed to provide a comprehensive assessment of the quality of surface and groundwater as influenced by changes in land use, agronomic, and cultural practices in the watershed over the duration of the project. The primary chemical characteristics monitored include both soluble and sediment-bound nutrients and pesticides in surface and groundwater. Water samples from 8 monitoring wells located in agricultural areas in the watershed were analyzed for 22 pesticides. A total of 20 pesticides have been detected in water samples collected. Atrazine is the most frequently detected pesticide. Detected concentrations of atrazine ranged from 0.03 - 25.56 ppb and occurred in about 26 percent of the samples. Other pesticides were detected at frequencies ranging from 1.6 to 14.2 percent of all samples collected and concentrations between 0.01 and 41.89 ppb. The observed concentrations and spatial distributions of pesticide contamination of groundwater are compared to land use and cropping patterns. Results indicate that BMPs are quite effective in reducing pesticide concentrations in groundwater.

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A storm water retrofit plan for the mimico creek watershed

Water Science & Technology ◽

10.2166/wst.1999.0539 ◽

1999 ◽

Vol 39 (12) ◽

pp. 133-140

Author(s):

J. Y. Li ◽

D. Banting

Keyword(s):

Water Quality ◽

Quality Management ◽

Great Lakes ◽

Management Practices ◽

Water Quality Management ◽

Storm Water ◽

Planning Tool ◽

Creek Watershed ◽

Urbanized Areas ◽

Goals And Objectives

Storm water quality management in urbanized areas remains a challenge to Canadian municipalities as the funding and planning mechanisms are not well defined. In order to provide assistance to urbanized municipalities in the Great Lakes areas, the Great Lakes 2000 Cleanup Fund and the Ontario Ministry of the Environment commissioned the authors to develop a Geographic Information System planning tool for storm water quality management in urbanized areas. The planning tool comprises five steps: (1) definition of storm water retrofit goals and objectives; (2) identification of appropriate retrofit storm water management practices; (3) formulation of storm water retrofit strategies; (4) evaluation of strategies with respect to retrofit goals and objectives; and (5) selection of storm water retrofit strategies. A case study of the fully urbanized Mimico Creek wateshed in the City of Toronto is used to demonstrate the application of the planning tool.

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SEDIMENT AND WATER QUALITY DETERMINATION OF THE OTTER CREEK WATERSHED

10.1130/abs/2018am-319270 ◽

2018 ◽

Author(s):

Hannah J. Veldhuizen ◽

◽

Bryanna Matthews ◽

Jennifer C. Latimer ◽

James H. Speer

Keyword(s):

Water Quality ◽

Creek Watershed

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REVISITING WATER QUALITY WITHIN THE BRIAR CREEK WATERSHED (COLUMBIA COUNTY, PA)

10.1130/abs/2019ne-328645 ◽

2019 ◽

Author(s):

Connor Gray ◽

◽

Erin Boulger ◽

Cynthia Venn ◽

Christopher P. Hallen

Keyword(s):

Water Quality ◽

Creek Watershed ◽

Columbia County

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Streamflow nitrogen loss following forest fertilization in a southern Vancouver Island watershed

Canadian Journal of Forest Research ◽

10.1139/x85-008 ◽

1985 ◽

Vol 15 (1) ◽

pp. 34-41 ◽

Cited By ~ 9

Author(s):

Eugene D. Hetherington

Keyword(s):

Water Quality ◽

Nitrogen Loss ◽

Vancouver Island ◽

Soil Permeability ◽

Creek Watershed ◽

Second Growth ◽

Nitrogen Concentrations ◽

Steep Slopes ◽

Fall Application ◽

Small Tributary

Water quality was monitored in the Lens Creek watershed on southern Vancouver Island to determine nitrogen loss following fall application of 224 kg N/ha urea fertilizer on a second-growth Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) forest. Peak nitrogen concentrations measured in two small tributary streams were 14 mg/L as urea, 1.9 mg/L as ammonia, and 9.3 mg/L as nitrate. For the first 14 months, estimated nitrogen outputs in excess of background amounts were 5.9 and 14.5% of the total applied nitrogen for the two subsidiary watersheds with 46 and 80% of their drainage areas fertilized, respectively. These losses were considerably higher than amounts of less than 1% previously reported for western North America. Increased levels of urea N and ammonia N were short-lived, while nitrate N remained above background levels for the study duration. Reasons for the high nitrogen loss include nitrification of the urea during 7 weeks of mild, dry weather following fertilization, presence of alder and swampy areas adjacent to the streams, high soil permeability, steep slopes, and abundant, above average early winter rainfall. The watersheds had been previously fertilized, but any influence of this first fertilization on nitrogen loss during the present study is unknown. Lens Creek water quality was not adversely affected by the fertilization in terms of drinking water standards or toxicity to fish.

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