Sample intake position and loading rates from nonpoint source pollution

1980 ◽  
Vol 4 (1) ◽  
pp. 73-77 ◽  
Author(s):  
P. E. McGuire ◽  
T. C. Daniel ◽  
D. Stoffel ◽  
B. Andraski
Keyword(s):  
Nonpoint Source Pollution ◽  
Nonpoint Source ◽  
Loading Rates ◽  
Sample Intake

Removal patterns of particulate and dissolved forms of pollutants in a stormwater wetland

2010 ◽  
Vol 61 (8) ◽  
pp. 2083-2096 ◽  
Author(s):  
Qitao Yi ◽  
Jianghua Yu ◽  
Youngchul Kim
Keyword(s):  
Nonpoint Source Pollution ◽  
Soluble Reactive Phosphorus ◽  
Nonpoint Source ◽  
Base Flow ◽  
Agricultural Watershed ◽  
Loading Rates ◽  
Average Value ◽  
Storm Flow ◽  
Reactive Phosphorus ◽  
Rainy Days

A 0.23-ha pilot wetland was constructed to examine its effectiveness for the control of nonpoint source pollution (NPS) from a 7.42-ha agricultural watershed in Korea. This research emphasised the removal patterns of particulate and dissolved forms of pollutants on both dry (base flow) and wet days (storm flow). The hydraulic loading rates were high on rainy days, with an average value of 0.78 m/day, but around 0.08 m/day on dry days. Particulate forms of pollutants, such as TSS, COD and TP, were removed to a greater extent on wet days due to sedimentation. On wet days, the incoming concentrations of NH4-N and soluble reactive phosphorus (SRP) were higher than during dry days, and can be partly retained via filtration and adsorption as they go through the wetland. The retention of TP and TSS on dry days could be affected by short antecedent dry days (ADDs), which will cause frequent hydraulic fluctuations in the wetland. Nitrogen removal is not influenced by this condition, with an average retention of around 20% on dry days, higher than the 6% removal on wet days.

Balancing Stream and Wetland Preservation with Nonpoint Source Pollution Management: A Case Study

1999 ◽  
Vol 40 (10) ◽  
pp. 137-144 ◽  
Author(s):  
Andrew T. Der
Keyword(s):  
Nonpoint Source Pollution ◽  
Management Strategies ◽  
Subsequent Development ◽  
Road Construction ◽  
Nonpoint Source ◽  
Assessment Procedure ◽  
Development Projects ◽  
Washington Dc ◽  
Potomac River ◽  
One Stop

The regulation of development-related activities can require complex approaches to the management of nonpoint source pollution (NPSP) associated with such activities. Experience has shown that growth and transportation needs can be accommodated in a manner which avoids and minimizes stream and wetland impacts while remaining compatible with effective NPSP management strategies, herein referred to as stormwater management (SWM). The Maryland Department of the Environment (MDE) has developed a “one stop shop” review and assessment procedure where applicable federal and State regulatory programs are combined into a single process where on-site conditions are assessed, potential impacts are identified and mitigative practices are proposed sufficient to offset habitat loss and comply with water quality standards. The example presented is the first of several development projects in a 405 hectare (1000 acre) watershed of the Potomac River in the greater Washington, DC area of Maryland. The project, submitted in 1989, proposed stream and wetland impacts for road construction and runoff catchment basins which were determined by MDE to be avoidable. Impacts were reduced and mitigated by design revisions and innovative approaches to wetland re-creation and SWM. Subsequent development projects in this watershed are currently expanding in a manner which utilizes and refines data obtained from this initial project with completion expected by 2003.

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