GROUNDWATER NITRATE CONCENTRATIONS IN THE RIPARIAN ZONES OF TWO SOUTHERN ONTARIO STREAMS
نویسندگان
چکیده
منابع مشابه
Influence of Riparian Seepage Zones on Nitrate Variability in Two Agricultural Headwater Streams
Riparian seeps have been recognized for their contributions to stream flow in headwater catchments, but there is limited data on how seeps affect stream water quality. The objective of this study was to examine the effect of seeps on the variability of stream NO3-N concentrations in FD36 and RS, two agricultural catchments in Pennsylvania. Stream samples were collected at 10-m intervals over re...
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This study was conducted to assess the removal of groundwater nitrate (NOa-) in different soil drainage classes within three riparian forests located in Rhode Island. A solution of NOa-and a conservative tracer [either bromide (Br-) or chloride (CI-)] was applied in growing and the dormant seasons to trenches upgradient of wetland locations with hydric soils (poorly and very poorly drained soil...
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We develop a method for multi-scale estimation of pollutant concentrations, based on a nonparametric spatial statistical model. We apply this method to estimate nitrate concentrations in groundwater over the mid-Atlantic states, using measurements gathered during a period of ten years. A map of the fine-scale estimated nitrate concentration is obtained, as well as maps of the estimated county-l...
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We measured denitrification, immobilization, and respiration in microcosms that simulated groundwater conditions in a riparian forest in Rhode Island. Measured rates were compared with rates of NOj" removal measured in a companion study using a groundwater monitoring well network and 10-mo injection of NOf and a bromide tracer to groundwater in the same riparian forest. Limiting factors for den...
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Our ability to identify and manage riparian sites for groundwater nitrate (NOAh) removal is limited by uncertainty surrounding the relative importance of plant uptake vs. microbially mediated removal processes. Microcosm studies often demonstrate negligible transformation rates in the subsoil of riparian forests, even in situations where groundwater well networks showed substantial groundwater ...
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ژورنال
عنوان ژورنال: Canadian Water Resources Journal
سال: 1999
ISSN: 0701-1784,1918-1817
DOI: 10.4296/cwrj2402125