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Author : Matthew Sándor Orosz
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (528 download)
Download or read book Total and Dissolved Organic Nitrogen Analysis in an Urban Watershed written by Matthew Sándor Orosz and published by . This book was released on 2003 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nahal Hoghooghi
Publisher :
ISBN 13 :
Total Pages : 254 pages
Book Rating : 4.:/5 (981 download)
Download or read book The Effect of Onsite Wastewater Treatment Systems on Nitrogen in Urban Watersheds of Metropolitan Atlanta, Georgia written by Nahal Hoghooghi and published by . This book was released on 2016 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: High density onsite wastewater treatment systems (OWTSs) can cause contamination of both surface water and groundwater. However, the effect of OWTS on water quality at the watershed-scale is not well understood. We investigated the effect of OWTS on stream N concentrations during base flow in 24 watersheds in Metropolitan Atlanta, ranging in area from 0.18 to 8.8 km2. We found that total nitrogen (TN) and nitrate (NO3- ) concentrations increased linearly with increasing OWTS density above a threshold of about 75 OWTS km-2. Dual-isotope analysis of NO3- revealed that stream NO3--N originated predominately from OWTS in high density (HD) watersheds and from a combination of animal waste and perhaps organic N in low density (LD) watersheds. The effect of OWTS on NO3- load in an urban watershed where most of the homes use OWTS was simulated using the Soil Water Assessment Tool (SWAT). The model showed satisfactory daily stream flow and NO3- loads with Nash-Sutcliffe coefficients of 0.62 and 0.58 for the calibration period, and 0.67 and 0.33 for the validation period. OWTS caused an average increase in NO3- load of about 23% at the watershed scale and 29% at the sub-basin outlet with the highest density of OWTS. Failing OWTS were estimated to be 1% of the total systems and did not have a large impact on NO3- load. The NO3- load was 74% of the total N load in the watershed. Results from detailed monitoring using automated samplers in four headwater streams with a gradient in OWTS density demonstrated that the highest base-flow and storm-flow TN concentrations occurred in watersheds with the lowest density of OWTS and the highest density of OWTS, respectively. There were significant positive correlations between base flow NO3- concentrations and OWTS density. TN loads were also the highest at extremes of OWTS densities. This was due to the pattern in N concentrations and higher water yields at low and high OWTS density. These findings confirm the importance of OWTS on water quality in urban watersheds and can be used in other Piedmont regions where nitrogen Total Maximum Daily Loads (TMDL) are being developed.
Author : Kingett, Mitchell Ltd
Publisher :
ISBN 13 : 9781877353178
Total Pages : 124 pages
Book Rating : 4.3/5 (531 download)
Download or read book A Study of Roof Runoff Quality in Auckland, NZ written by Kingett, Mitchell Ltd and published by . This book was released on 2004-01-01 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paula G. Coble
Publisher : Cambridge University Press
ISBN 13 : 0521764610
Total Pages : 407 pages
Book Rating : 4.5/5 (217 download)
Download or read book Aquatic Organic Matter Fluorescence written by Paula G. Coble and published by Cambridge University Press. This book was released on 2014-07-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: A core text on principles, laboratory/field methodologies, and data interpretation for fluorescence applications in aquatic science, for advanced students and researchers.
Author :
Publisher :
ISBN 13 :
Total Pages : 170 pages
Book Rating : 4.:/5 (319 download)
Download or read book U.S. Geological Survey Water-supply Paper written by and published by . This book was released on 1982 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Darryl McLeod
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (111 download)
Download or read book Determination of Dissolved Organic Nitrogen in a Freshwater Catchment by Use of a New Method for the Flurometric Determination of NH4-N. written by Darryl McLeod and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Bennet Lawes
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.3/5 (243 download)
Download or read book On the Amount and Composition of the Rain and Drainage-waters Collected at Rothamsted written by John Bennet Lawes and published by . This book was released on 1882 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sharon E. Kroening
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.3/5 (243 download)
Download or read book Scientific Investigations Report written by Sharon E. Kroening and published by . This book was released on 2004 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309069483
Total Pages : 422 pages
Book Rating : 4.3/5 (9 download)
Download or read book Clean Coastal Waters written by National Research Council and published by National Academies Press. This book was released on 2000-08-17 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental problems in coastal ecosystems can sometimes be attributed to excess nutrients flowing from upstream watersheds into estuarine settings. This nutrient over-enrichment can result in toxic algal blooms, shellfish poisoning, coral reef destruction, and other harmful outcomes. All U.S. coasts show signs of nutrient over-enrichment, and scientists predict worsening problems in the years ahead. Clean Coastal Waters explains technical aspects of nutrient over-enrichment and proposes both immediate local action by coastal managers and a longer-term national strategy incorporating policy design, classification of affected sites, law and regulation, coordination, and communication. Highlighting the Gulf of Mexico's "Dead Zone," the Pfiesteria outbreak in a tributary of Chesapeake Bay, and other cases, the book explains how nutrients work in the environment, why nitrogen is important, how enrichment turns into over-enrichment, and why some environments are especially susceptible. Economic as well as ecological impacts are examined. In addressing abatement strategies, the committee discusses the importance of monitoring sites, developing useful models of over-enrichment, and setting water quality goals. The book also reviews voluntary programs, mandatory controls, tax incentives, and other policy options for reducing the flow of nutrients from agricultural operations and other sources.
Author : Matthew A. Domser
Publisher :
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (268 download)
Download or read book Comparing Solute Fluxes and Evaluating Sources and Fates of Dissolved Organic Nitrogen in an Adirondack Watershed written by Matthew A. Domser and published by . This book was released on 2008 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Geological Survey (U.S.)
Publisher :
ISBN 13 :
Total Pages : 414 pages
Book Rating : 4.3/5 (129 download)
Download or read book Geological Survey Professional Paper written by Geological Survey (U.S.) and published by . This book was released on 1982 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 594 pages
Book Rating : 4.:/5 (319 download)
Download or read book Water-resources Investigations Report written by and published by . This book was released on 2003 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Eliza Watson
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (812 download)
Download or read book Surface Water Chemistry in White Oak Creek, North-East Texas written by Eliza Watson and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last few decades increasing attention has been paid to the effects of land use activities and land management on stream water quality. Recent research has largely focused on dominant land uses such as urban development and agricultural cropland. The relative effect of land use activities and management on stream chemistry in sub-tropical rangeland ecosystems, where much of the land use is converted to pasture and agriculture is largely unknown. This study examined stream water quality and land use in a sub-tropical watershed in Northeast Texas largely dominated by rangeland. The study site, White Oak Creek Watershed located in the Sulphur River Basin, has been identified as an impaired stream due to low dissolved oxygen concentrations and subsequently listed on the Texas Commission for Environmental Quality's 303d list (TCEQ). In an attempt to determine potential sources of the low dissolved oxygen concentrations, twenty different chemical constituents were analyzed at 18 different sample sites in the tributaries of White Oak Creek and also along the main stem from April 2010 to March 2011. Dissolved oxygen concentrations over the study period were consistently above the minimum standard required by TCEQ and showed no indication of impairment. Correlation analysis did not show any clear correlation between dissolved oxygen and any specific land use, or any chemical constituent. Some nutrients and suspended sediment concentrations were significantly different among the sub-catchments of White Oak Creek. Urban land uses were significantly and positively correlated to electrical conductivity, ammonium-N, magnesium, calcium, and dissolved organic carbon. Agricultural land use was significantly and positively correlated to orthophosphate-P, dissolved organic nitrogen, total suspended solids, and turbidity. Forests were inversely and significantly related to nitrate-N, orthophosphate-P, sulfate, dissolved organic carbon, total suspended solids, and turbidity. The study suggested that by maintaining a relatively high proportion of forested land in a watershed that water quality can be improved.
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309172683
Total Pages : 569 pages
Book Rating : 4.3/5 (91 download)
Download or read book Watershed Management for Potable Water Supply written by National Research Council and published by National Academies Press. This book was released on 2000-02-17 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1997, New York City adopted a mammoth watershed agreement to protect its drinking water and avoid filtration of its large upstate surface water supply. Shortly thereafter, the NRC began an analysis of the agreement's scientific validity. The resulting book finds New York City's watershed agreement to be a good template for proactive watershed management that, if properly implemented, will maintain high water quality. However, it cautions that the agreement is not a guarantee of permanent filtration avoidance because of changing regulations, uncertainties regarding pollution sources, advances in treatment technologies, and natural variations in watershed conditions. The book recommends that New York City place its highest priority on pathogenic microorganisms in the watershed and direct its resources toward improving methods for detecting pathogens, understanding pathogen transport and fate, and demonstrating that best management practices will remove pathogens. Other recommendations, which are broadly applicable to surface water supplies across the country, target buffer zones, stormwater management, water quality monitoring, and effluent trading.
Author : Miguel Angel Lopez
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.3/5 (126 download)
Download or read book Water-quality Characteristics of Urban Runoff and Estimates of Annual Loads in the Tampa Bay Area, Florida, 1975-80 written by Miguel Angel Lopez and published by . This book was released on 1984 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.3/5 (121 download)
Download or read book Water-quality Assessment of the Potomac River Basin : Basin Description and Analysis of Available Nutrient Data, 1970-90 written by and published by . This book was released on 1996 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 492 pages
Book Rating : 4.3/5 (91 download)
Download or read book U.S. Geological Survey Professional Paper written by and published by . This book was released on 1982 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
