Passive sampling and ecohydrologic modeling to investigate pesticide surface water loading in the Zollner Creek watershed, Oregon, USA

2022 ◽  
pp. 152955
Author(s):  
Philip Janney ◽  
Jeffrey Jenkins
Keyword(s):  
Surface Water ◽  
Passive Sampling ◽  
Water Loading ◽  
Creek Watershed

scholarly journals Development of passive sampler POCIS for the analysis of polar pesticides in surface water

2015 ◽  
Vol 18 (2) ◽  
pp. 132-144
Author(s):  
Trang Thi Nhu Tran ◽  
Ty Thi Pham ◽  
Hai Lam Son Truong
Keyword(s):  
Surface Water ◽  
Environmental Factors ◽  
Pesticide Residues ◽  
Passive Sampling ◽  
Sampling Method ◽  
Passive Sampler ◽  
Polar Pesticides ◽  
Sampling Process ◽  
European Standards ◽  
First Time

The first time in Vietnam a passive sampling method has been developed to analyse the polar pesticides in surface water. The initial investigations of POCIS were performed for 7 polar pesticides as simazine,thiodicarb, carbofuran, chlortoluron, atrazine, isoproturon, and diuron. We determined the sampling rates RS for these substances ranged from 0.369 to 0.962 L day- 1. The obtained values of ku and RS showed the important influence of environmental factors such as flow on the ability to integrate polar pesticides in passive sampling process. This method can be applied to determine these 7 polar pesticides in surface water at trace levels according to European standards for pesticide residues in water (< 0.1 μg L-1).

Enhanced Prairie Wetland Effects on Surface Water Quality in Crowfoot Creek, Alberta

2003 ◽  
Vol 38 (2) ◽  
pp. 335-359 ◽  
Author(s):  
Gerald R. Ontkean ◽  
David S. Chanasyk ◽  
Sandi Riemersma ◽  
D. Rodney Bennett ◽  
Jerry M. Brunen
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Nutrient Status ◽  
Nutrient Concentrations ◽  
Prairie Wetland ◽  
Spring Runoff ◽  
Creek Watershed ◽  
Decomposition Of Organic Matter ◽  
Waterfowl Habitat

Abstract A three-year study was conducted to examine the effects of a prairie wetland enhanced for waterfowl habitat on surface water quality in the Crowfoot Creek watershed in southern Alberta, Canada. Monitoring was carried out at the Hilton wetland from mid-March to the end of October in 1997 to 1999 at two inflow sites and one outflow site. Data were collected on flow, total phosphorus (TP), total nitrogen (TN), total suspended solids (TSS), and fecal coliform (FC) bacteria. Nutrient concentrations were highest in the spring, and decreased during the remainder of the monitoring period each year. Nutrient concentrations did not change significantly within the wetland due to the form of nutrient, reduced retention times for nutrient uptake, and the addition of nutrients to the water through sediment release and decomposition of organic matter. The wetland acted as both a source and a sink for nutrients, depending on flow volumes. TSS concentrations decreased significantly from inflow to outflow, indicating sedimentation occurred in the wetland. FC bacteria levels were lowest in the spring and increased during the post-spring runoff (PSRO) period. FC bacteria counts decreased significantly within the wetland throughout the entire year. The Hilton wetland was effective in reducing the amounts of TSS and FC bacteria exported from the wetland; however, there was no significant change in nutrient status.

Growing season surface water loading of fecal indicator organisms within a rural watershed

2009 ◽  
Vol 43 (5) ◽  
pp. 1199-1206 ◽  
Author(s):  
A. Sinclair ◽  
D. Hebb ◽  
R. Jamieson ◽  
R. Gordon ◽  
K. Benedict ◽  
...  
Keyword(s):  
Surface Water ◽  
Growing Season ◽  
Indicator Organisms ◽  
Fecal Indicator ◽  
Water Loading
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