Download or read book Identification and Evaluation of Methods for Determining Sources of Nitrate Contamination in Groundwater written by California. State Water Resources Control Board and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification and Evaluation of Methods for Determining Sources of Nitrate Contamination in Groundwater Final project report appendices written by California. State Water Resources Control Board and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification and Evaluation of Methods for Determining Sources of Nitrate Contamination in Groundwater written by Dennis Eugene Rolston and published by . This book was released on 1994 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification and Evaluation of Methods for Determining Sources of Nitrate Contamination in Groundwater written by California. State Water Resources Control Board and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidance manual written by California. State Water Resources Control Board and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater Quality written by Harriet Nash and published by Springer. This book was released on 1994-10-31 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater quality monitoring and testing is of paramount importance both in the developed and developing world. This book presents a series of papers illustrating the varied nature of current research into groundwater quality. Urban and rural supplies are covered through a case history approach, and the importance of remedial action to prevent deterioration is emphasized.
Download or read book Identification and Evaluation of Methods for Determining Sources of Nitrate Contamination in Groundwater Final project report appendices written by California. State Water Resources Control Board and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sava River written by Radmila Milačič and published by Springer. This book was released on 2014-11-05 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a comprehensive overview of environmental aspects of the Sava River, which is the greatest tributary to the Danube River and the major drainage river system of South Eastern Europe. Hydroelectric power plants, river traffic, intensive agricultural activities, heavy industry and floods have considerable influence on the environment and biota in the basin. Summarizing the results that were gathered in the course of EU, bilateral and national projects, the book highlights the most important stressors and helps readers to better understand the impact of anthropogenic activities on the function of river basins. Topics include: transboundary water cooperation between the riparian countries; climate change projection, including its impact on flood hazards; evaluation of anthropogenic pollution sources; pollution of sediments, metal bioavailability and ecotoxicological and microbiological characterization of the river. The biological part also addresses quality aspects related to wildlife in river aquatic ecosystems (algae, macrophytes, zooplankton, macroinvertebrates and fish) and riparian ecosystems (amphibians, reptiles, birds and mammals). The general state of biodiversity and pressures caused by invasive aquatic species are also discussed.
Download or read book Evaluation of Nitrate Sources Using Nitrogen isotope Techniques in Shallow Ground Water Within Selected Lake Basins in the Central Lakes District Polk and Highlands Counties Florida written by Ann B. Tihansky and published by . This book was released on 1997 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrates in Groundwater written by Larry W. Canter and published by CRC Press. This book was released on 1996-09-18 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This time-saving book provides extensive coverage of all important aspects of nitrates in groundwater, ranging from prevention to problem assessment to remediation. It begins by highlighting the nitrogen cycle and related health concerns, providing both background information and a unique perspective on health issues. It then analyzes subsurface processes and the factors and practices that affect them. It thoroughly reviews aquifer vulnerability mapping, an emerging new management tool, and contains a nitrate pollution index that can be used in evaluating actual or potential nitrate pollution from agricultural areas. Best Management Practices are described and evaluated, and possible treatment measures are also explored. Thoroughly researched and well-organized, Nitrates in Groundwater provides a vivid snapshot of the status of nitrates in groundwater today.
Download or read book Identifying Sources of Subsurface Nitrate Pollution with Stable Nitrogen Isotopes written by Timothy J. Wolterink and published by . This book was released on 1979 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods for Identifying and Evaluating the Nature and Extent of Nonpoint Sources of Pollutants written by Midwest Research Institute (Kansas City, Mo.) and published by . This book was released on 1973 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrate Contamination written by Istvan Bogardi and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nitrate content of drinking water is rising at an alarming rate in several regions of NATO countries and elsewhere in the world. The increase is due to lack of proper sewage treatment, and primarily to excess fertilizer application. Also, eutrophication in several coastal areas is triggered by high nitrate concentrations. The main purpose of this book is to integrate scientific knowledge related to exposure assessment, health consequences and control of nitrate contamination in water. The motivation is related to the magnitude, the possible adverse health effects, and the high cost of control ling nitrate contamination. Future research tasks are defined by an interaction among hydro logists, toxicologists and environmental engineers in an integrated framework for nitrate risk management. The target readership of this book is a mix of university colleagues, practitioners from both the private and public sectors and advanced graduate students working with the hydrological, health science or environmental engineering aspects of nitrate contamination. The main conclusions include: 1. For risk assessment purposes, knowledge and sufficiently accurate models are available to predict nitrate load and its fate in water under changes in land use. 2. Once agricultural exposure controls are implemented, the response times in ground water may be so long as to make controls unrealistic. 3. It is still unknown whether agricultural best management practice is a compromise between nitrate risk reduction and agricultural revenue. 4. The current drinking water guidelines of 10 mg/L NOrN need not be changed.
Download or read book Monitored Natural Attenuation of Inorganic Contaminants in Ground Water written by and published by . This book was released on 2007 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: V.3 ... consists of individual chapters that describe 1) the conceptual background for radionuclides, including tritium, radon, strontium, technetium, uranium, iodine, radium, thorium, cesium, plutonium-americium and 2) data requirements to be met during site characterization.
Download or read book Determining the Source of Nitrate Contamination in Groundwater Using 15 nitrogen as a Tracer written by Kevin Michael Morrissey and published by . This book was released on 1989 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vulnerability Assessment of Nitrate Leaching on the Regional Scale Using Isotope Techniques written by Myriam Maria Stoewer and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Zusammenfassung: Groundwater is an important source of drinking water, but its quality is threatened by contamination with nitrate. In order to prevent groundwater contamination, knowledge about potential nitrate sources, their pathways and time lag between sources and drinking water wells is required. Still, i) simple methods to quantify nitrate fluxes are missing, ii) the applicability of stable isotopes of nitrate in nitrate source identification in grassland systems remains unknown, and iii) there is a lack of physically based modeling approaches focusing on the spatially resolved estimation of groundwater vulnerability to nitrate contamination. Thus, the objectives of the thesis are to i) quantify nitrate leaching in soils, ii) identify major sources of nitrate in aquifers, and iii) determine the intrinsic and nitrate specific aquifer vulnerability. The objectives were realized in a pre-alpine area with oligotrophic aquifers used for drinking water supply. Different isotopic and environmental tracers were used to understand the local hydrogeology and the fate of nitrate and related dynamic transformation processes. At farmed grassland sites, analysis of nitrate concentration in soil water below the root zone using suction cups was combined with groundwater recharge rates estimated from vertical deuterium profiles in soil to calculate nitrate fluxes. Stable isotopes of nitrate were analyzed in surface water, soil water and groundwater and compared with the distinct isotope composition of nitrate in potential sources. Local tritium concentrations were used in combination with a lumped-parameter model to calculate the mean residence times (MRTt) and MRTt distributions of local groundwater wells. The intrinsic and nitrate specific vulnerability of groundwater was spatially assessed (GIS) based on the approximation of the total mean residence time (MRT) and the residence time distribution as well as consulting data on nitrate leaching.Measured nitrate concentration below the root zone varies between 0 and 90 mg NO3- L-1. Estimated groundwater recharge rates cover a range of 430 to 926 mm yr-1. Nitrate leaching (0.2 to 41 kg NO3-N ha-1 yr-1) at grassland sites is highest in spring and fall. At farmed sites, nitrate leaching is positively related to fertilizer input rather than land use category (organic, conventional). Nitrate isotope values indicate that nitrate derive from ammonium nitrification of multiple sources, such as atmospheric deposition, mineral fertilizer, organic fertilizer and soil organic matter. The results suggest that local nitrate input is buffered in the upper soil, due to incorporation into soil organic matter, and released by subsequent mineralization and nitrification. Due to observed oxic conditions present in groundwater, the natural attenuation potential regarding nitrate (denitrification) is low. Modeled MRTt varies between 5 and 21 years, indicating that investigated groundwater wells are less vulnerable to short-term impacts. Though, such moderate to high MRT itself do not protect groundwater against contamination with nitrate. The observed MRT varies between smaller than 5 and 51 years. In comparison, the distribution curves generated from both modeling approaches show that the GIS approach neglects fast flow paths lower than five years. The results of the specific vulnerability assessment characterize the observation area as less vulnerable to groundwater contamination with nitrate. This is achieved by not exceeding the drinking water threshold due to the absence of land use, inducing high loads of nitrate leaching. Nevertheless, any increase in fertilizer application could change the nitrate level in groundwater due to oxic conditions and the underestimation of fast flow paths. Finally it is shown that time lags associated with land use are a perfect tool and need to be considered for management strategies. Consequently, areas attributed to low MRT are vulnerable to short-term contaminations but provide the chance to react fast in terms of groundwater protection management. On the contrary, areas attributed to high MRT might favor the natural attenuation and dilution of nitrate, but once nitrate has entered the groundwater, remediation strategies struggle with the time lag which results in long-term impacts on groundwater quality.The study shows that the combination of methods dealing with different scales results in a comprehensive assessment of groundwater vulnerability regarding nitrate leaching. Pre-alpine oligotrophic aquifers mainly covered with grassland require the need to reduce nitrogen input in groundwater catchments in order to protect water quality. This applies for areas vulnerable to short-term impacts as well as areas vulnerable to long-term impacts. In future, investigations examining the applicability of nitrogen in soil organic matter into fertilizer management are required in order to distinguish between organic fertilizer and sewage. In addition, nitrate source identification in such catchments should be combined with sophisticated tracers in order to distinguish between organic fertilizer and sewage effluent. Furthermore, the spatial assessment of groundwater vulnerability to nitrate contamination emphasizes the need to include the impact of hydrological dynamics as well as temporal and spatial variability in terms of land use
Download or read book Developing and Testing a Method for the Analysis of Chemical Human Waste Markers in Groundwater and Identifying Sources of Nitrate Contamination written by Amy L. Nitka and published by . This book was released on 2014 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
