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Author : 王晓丽
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book Surface Water-groundwater Interactions and Associated Nutrient Loading Into the Coastal Waters written by 王晓丽 and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Habil. Jörg Lewandowski
Publisher : MDPI
ISBN 13 : 3039289055
Total Pages : 438 pages
Book Rating : 4.0/5 (392 download)
Download or read book Groundwater-Surface Water Interactions written by Habil. Jörg Lewandowski and published by MDPI. This book was released on 2020-12-10 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent years have seen a paradigm shift in our understanding of groundwater–surface water interactions: surface water and aquifers were long considered discrete, separate entities; they are now understood as integral components of a surface–subsurface continuum. This book provides an overview of current research advances and innovative approaches in groundwater–surface water interactions. The 20 research articles and 1 communication cover a wide range of thematic scopes, scales, and experimental and modelling methods across different disciplines (hydrology, aquatic ecology, biogeochemistry, and environmental pollution). The book identifies current knowledge gaps and reveals the challenges in establishing standardized measurement, observation, and assessment approaches. It includes current hot topcis with environmental and societal relevance such as eutrophication, retention of legacy, and emerging pollutants (e.g., pharmaceuticals and microplastics), urban water interfaces, and climate change impacts. The book demonstrates the relevance of processes at groundwater–surface water interfaces for (1) regional water balances and (2) quality and quantity of drinking water resources. As such, this book represents the long-awaited transfer of the above-mentioned paradigm shift in understanding of groundwater–surface water interactions from science to practice.
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 : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309048265
Total Pages : 497 pages
Book Rating : 4.3/5 (9 download)
Download or read book Managing Wastewater in Coastal Urban Areas written by National Research Council and published by National Academies Press. This book was released on 1993-02-01 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Close to one-half of all Americans live in coastal counties. The resulting flood of wastewater, stormwater, and pollutants discharged into coastal waters is a major concern. This book offers a well-delineated approach to integrated coastal management beginning with wastewater and stormwater control. The committee presents an overview of current management practices and problems. The core of the volume is a detailed model for integrated coastal management, offering basic principles and methods, a direction for moving from general concerns to day-to-day activities, specific steps from goal setting through monitoring performance, and a base of scientific and technical information. Success stories from the Chesapeake and Santa Monica bays are included. The volume discusses potential barriers to integrated coastal management and how they may be overcome and suggests steps for introducing this concept into current programs and legislation. This practical volume will be important to anyone concerned about management of coastal waters: policymakers, resource and municipal managers, environmental professionals, concerned community groups, and researchers, as well as faculty and students in environmental studies.
Author :
Publisher : DIANE Publishing
ISBN 13 : 1428902104
Total Pages : 204 pages
Book Rating : 4.4/5 (289 download)
Download or read book Proceedings of the groundwater/surfacewater interactions workshop written by and published by DIANE Publishing. This book was released on 2000 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J.R. Delsman
Publisher : IOS Press
ISBN 13 : 1614995184
Total Pages : 196 pages
Book Rating : 4.6/5 (149 download)
Download or read book Saline Groundwater - Surface Water Interaction in Coastal Lowlands written by J.R. Delsman and published by IOS Press. This book was released on 2015-05-07 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal zones are among the world's most densely populated and economically important areas, but these factors put pressure on the often limited available freshwater resources. Global change will undoubtedly increase this pressure through the combined effects of increased population, economic development, rising sea levels, increased evapotranspiration, over-extraction and the salinization of coastal aquifers, decreasing river discharges, and accelerating land subsidence. Saline groundwater exfiltration is a common problem in the coastal zone of the Netherlands, but the hydrological processes and physiographic factors that affect this are not fully understood. The research presented in this book aims to identify the processes and physiographic factors controlling the spatial variability and temporal dynamics of the exfiltration of saline groundwater to surface water, and hence the contribution of saline groundwater to surface water salinity. Topics covered include a paleo-hydrogeological model simulation of the Holocene evolution of groundwater salinity as a result of paleo-geographic changes; surface water salinity dynamics in a densely-drained lowland catchment; hydrograph separation in an agricultural catchment; observations of heads, flow, solute concentration and temperature to constrain a detailed, variable-density groundwater flow and transport model; and a model to simulate the salinity dynamics of exfiltrating groundwater to support operational water management of freshwater resources in coastal lowlands. The book further outlines the implications of these findings for freshwater management in the Netherlands. The book demonstrates that the salinity of groundwater exfiltrating in polders in the Netherlands, and hence surface water salinity, varies on a wide range of spatial and temporal scales.
Author : Makoto Taniguchi
Publisher : Frontiers Media SA
ISBN 13 : 2889665356
Total Pages : 158 pages
Book Rating : 4.8/5 (896 download)
Download or read book Submarine Groundwater Discharge: Impacts on Coastal Ecosystem by Hidden Water and Dissolved Materials written by Makoto Taniguchi and published by Frontiers Media SA. This book was released on 2021-03-03 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ian D. Clark
Publisher : CRC Press
ISBN 13 : 1482242915
Total Pages : 343 pages
Book Rating : 4.4/5 (822 download)
Download or read book Environmental Isotopes in Hydrogeology written by Ian D. Clark and published by CRC Press. This book was released on 2013-11-20 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater is an increasingly important resource to human populations around the world, and the study and protection of groundwater is an essential part of hydrogeology - the subset of hydrology that concentrates on the subsurface. Environmental isotopes, naturally occurring nuclides in water and solutes, have become fundamental tools for tracing
Author : B.T. Hart
Publisher : Springer Science & Business Media
ISBN 13 : 9401127832
Total Pages : 733 pages
Book Rating : 4.4/5 (11 download)
Download or read book Sediment/Water Interactions written by B.T. Hart and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 733 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers appearing in this volume reflect the current attention in sediment/water science to five main topics of investigation: Sediment dynamics in estuaries, coastal waters, lakes, reservoirs and rivers; Sediment-associated biological processes; Contaminant accumulation, distribution and geochemistry; Fluxes from sediments; and Element cycling. Contributors address sediment/water interactions related to both fresh and salt water conditions.
Author : Stefan Schmutz
Publisher : Springer
ISBN 13 : 3319732501
Total Pages : 562 pages
Book Rating : 4.3/5 (197 download)
Download or read book Riverine Ecosystem Management written by Stefan Schmutz and published by Springer. This book was released on 2018-05-08 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book surveys the frontier of scientific river research and provides examples to guide management towards a sustainable future of riverine ecosystems. Principal structures and functions of the biogeosphere of rivers are explained; key threats are identified, and effective solutions for restoration and mitigation are provided. Rivers are among the most threatened ecosystems of the world. They increasingly suffer from pollution, water abstraction, river channelisation and damming. Fundamental knowledge of ecosystem structure and function is necessary to understand how human acitivities interfere with natural processes and which interventions are feasible to rectify this. Modern water legislation strives for sustainable water resource management and protection of important habitats and species. However, decision makers would benefit from more profound understanding of ecosystem degradation processes and of innovative methodologies and tools for efficient mitigation and restoration. The book provides best-practice examples of sustainable river management from on-site studies, European-wide analyses and case studies from other parts of the world. This book will be of interest to researchers in the field of aquatic ecology, river system functioning, conservation and restoration, to postgraduate students, to institutions involved in water management, and to water related industries.
Author :
Publisher :
ISBN 13 :
Total Pages : 86 pages
Book Rating : 4.:/5 (85 download)
Download or read book A Rapid Method for Measuring Local Groundwater-surface Water Interactions and Identifying Potential Non-point Source Pollution Inputs to Rivers written by and published by . This book was released on 2008 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agriculture in the Central Valley of California is a potential contributor of non-point source pollution to surface waters via the groundwater pathway. This work presents a relatively simple method and inexpensive apparatus for quantifying local groundwater discharge into rivers using heat as a tracer. Two transects along a known gaining reach of the Lower Merced River were used to evaluate the effectiveness of the groundwater discharge monitoring instruments, known as Temperature Javelins, over three months. In terms of fulfilling deployment objectives, Temperature Javelins proved to be low cost, easy to install, and yielded easily interpretable data related to groundwater-surface water discharges. Groundwater discharge velocities were found to vary over time seasonally and spatially (on a scale of meters). Discharges ranged from 0.1 to 6.8 cm/day with higher discharge velocities found on the northern side of the river. These values are consistent with previous values obtained at the same site using other methods. Corresponding hyporheic water samples were collected to investigate solute transport (specifically nitrate) by the discharging water. Nitrate concentrations ranged from nondetectable to 50 ppm in these samples, where elevated values appear to be associated with groundwater entering on the north side of the river. Elevated nitrate flow lines in the hyporheic zone correspond with high discharge areas and alternate with ammonium enriched columns and low groundwater discharge. It is hypothesized that nitrification cells are induced by groundwater-surface water interactions. Testing of this hypothesis is proposed as a subject of further research.
Author : Mats Wallin
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.3/5 (91 download)
Download or read book Nutrient Loading Models for Coastal Waters written by Mats Wallin and published by . This book was released on 1991 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zhen-Gang Ji
Publisher : John Wiley & Sons
ISBN 13 : 1118877152
Total Pages : 612 pages
Book Rating : 4.1/5 (188 download)
Download or read book Hydrodynamics and Water Quality written by Zhen-Gang Ji and published by John Wiley & Sons. This book was released on 2017-07-05 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary reference for the modeling of hydrodynamics and water quality in rivers, lake, estuaries, coastal waters, and wetlands This comprehensive text perfectly illustrates the principles, basic processes, mathematical descriptions, case studies, and practical applications associated with surface waters. It focuses on solving practical problems in rivers, lakes, estuaries, coastal waters, and wetlands. Most of the theories and technical approaches presented within have been implemented in mathematical models and applied to solve practical problems. Throughout the book, case studies are presented to demonstrate how the basic theories and technical approaches are implemented into models, and how these models are applied to solve practical environmental/water resources problems. This new edition of Hydrodynamics and Water Quality: Modeling Rivers, Lakes, and Estuaries has been updated with more than 40% new information. It features several new chapters, including one devoted to shallow water processes in wetlands as well as another focused on extreme value theory and environmental risk analysis. It is also supplemented with a new website that provides files needed for sample applications, such as source codes, executable codes, input files, output files, model manuals, reports, technical notes, and utility programs. This new edition of the book: Includes more than 120 new/updated figures and 450 references Covers state-of-the-art hydrodynamics, sediment transport, toxics fate and transport, and water quality in surface waters Provides essential and updated information on mathematical models Focuses on how to solve practical problems in surface waters—presenting basic theories and technical approaches so that mathematical models can be understood and applied to simulate processes in surface waters Hailed as “a great addition to any university library” by the Journal of the American Water Resources Association (July 2009), Hydrodynamics and Water Quality, Second Edition is an essential reference for practicing engineers, scientists, and water resource managers worldwide.
Author : Kayla D. Holleman
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (86 download)
Download or read book Impact of Flux, Residence Time and Nutrient Load of Submarine Groundwater Discharge on Coastal Phytoplankton Growth in Coastal Waters of Hawai'i written by Kayla D. Holleman and published by . This book was released on 2011 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Submarine groundwater discharge (SGD) is an important land-to-ocean pathway for biogeochemically significant nutrients, such as nitrate, silicate and phosphate. Introduction of new bioavailable nutrients from SGD into coastal waters can alter a coastal system's nutrient balance, and may result in increases in phytoplankton or macroalgae growth that in turn can cause other ecological shifts in biological species' composition (Valiela et al., 1990). In order to attempt a first investigation of the possible relative impact(s) of the amount, flux, and residence times of SGD and SGD-derived nutrients on coastal phytoplankton in the oligotrophic coastal waters off Hawaii, detailed studies were completed to compare the flux and residence times of SGD and SGD-derived nutrients on biological processes at three sites on the leeward-side of the Koolau Mountains along the southern shore of Oahu (the Ala Wai Canal, Black Point, and Wailupe Beach) and at one site on the leeward-side of Hualalai, on the western side of the Big Island of Hawaii (Honokohau Harbor, Hawaii). At each site, radon and short-lived radium isotopes were used to calculate the flux of SGD and SGD-derived constituents into the coastal areas and their residence times. The rate of uptake of 13C by photoautotrophs was determined using in situ incubation experiments with addition of 13C-labeled bicarbonate at most sites and was used as a relative indicator of photosynthetic activity and its response to potential input of SGD-derived nutrients At study sites along the southern shore of Oahu, nutrient fluxes for a shoreline length of 1.18 km was 281 PO43−, 113,015 Si(OH)4, and 10,505 NO3− mol/d, respectively. Nutrient fluxes for Honokohau Harbor, estimated to have a 375-m wide seepage face, were 194 PO43−, 31,998 Si(OH)4, and 3,123 NO3− mol/d respectively. Photosynthetic carbon production rates were significantly higher for the Ala Wai Canal (1.39 [micro]gC/L/h) than for Honokohau Harbor (0.10[micro]gC/L/h). Using these carbon uptake rates and assuming a Redfield C:N:P ratio of 106:16:1, nitrogen and phosphorus uptake rates for both the Ala Wai Canal and Honokohau Harbor were less than 2% of the nutrients delivered by SGD. Variation in the N:P ratios observed in the groundwater and coastal waters could imply nutrient limitation. We found for the restricted estuarine-like embayments of the Ala Wai canal (water mass residence time 10-13 days) and Honokohau Harbor (water mass residence time 0.5 -6 days), that primary productivity is not controlled by the availability of nutrients (nutrient supply> phytoplankton demand in both settings), but is nonetheless directly linked to each water mass' residence time. As nutrients are in excess of demand in both settings, we conclude that it is the physical longevity and residence time of the phytoplankton itself that ultimately controls each basin's ultimate level of sustained primary productivity.
Author : Deon Hanley Knights
Publisher :
ISBN 13 :
Total Pages : 143 pages
Book Rating : 4.:/5 (128 download)
Download or read book The Fate of Nutrients in Two Coastal Freshwater Systems written by Deon Hanley Knights and published by . This book was released on 2020 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human activities including fertilizer application and fossil fuel burning have increased nutrient concentrations in coastal waters. Nutrient inputs can be difficult to constrain at the coastal interface where multiple waters mix, including river water, groundwater, and lake or ocean water. At coastal interfaces, rivers distribute their nutrient loads across delta wetlands, where processes like anaerobic respiration and plant uptake may reduce nutrient concentrations. Beneath the coast, groundwater also carries nutrients offshore, where biogeochemical reactions alter the nutrient chemistry and discharge rates are difficult to measure. I aim to improve the assessment of nutrient loads to coastal waters in these challenging environments through two case studies. First, I estimate groundwater discharge, a previously unaccounted source of nutrients, to the United States Great Lakes coast using high-resolution geospatial analysis. By integrating land use data, I also identify areas of the coast that are vulnerable to high nutrient loads from groundwater. My analysis shows that almost one-third of Lake Erie’s United States coastline is vulnerable to contamination from groundwater nutrient sources. By collecting field measurements at a vulnerable beach site, I show that the nitrogen load from groundwater exceeds 1 gram/day/meter of coastline, which constitutes a small but non-negligible source to Lake Erie. In the second case study, I use benthic chambers to measure nitrogen removal rates in a coastal wetland in Wax Lake Delta, Louisiana. Results suggest that summertime nitrate removal kinetics are highly correlated with a widely available remotely-sensed vegetation index (NDVI). Heavily vegetated, submerged levees at intermediate elevations in the delta are thus predicted to be the most reactive habitats. Though less reactive, larger channels primarily on the eastern half of the delta may contribute most to nitrate removal, as they receive the greatest mass fluxes of nitrate. Numerical simulations of reactive nitrate transport in Wax Lake Delta and six synthetic deltas suggest that nitrate removal may be intrinsically limited in river-dominated deltas to a small fraction of the incoming nitrate load. Removal increases with delta topset gradient, and smaller, high-sitting deltas remove more nitrate than larger, low-lying deltas. From a management standpoint, nitrate removal efficiency can be improved by designing river diversions to build steeper deltas. Steeper deltas are created by accessing coarser sediments in river diversion projects. However, manmade deltas alone cannot remove most nitrate discharging to the sea. Policy that addresses the nitrate load upstream is necessary to further reduce coastal nitrate loading.
Author :
Publisher :
ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.3/5 (121 download)
Download or read book Nutrient Criteria Technical Guidance Manual written by and published by . This book was released on 2000 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Luis Ribeiro
Publisher : CRC Press
ISBN 13 : 1138000337
Total Pages : 360 pages
Book Rating : 4.1/5 (38 download)
Download or read book Groundwater and Ecosystems written by Luis Ribeiro and published by CRC Press. This book was released on 2013-06-13 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater resources are facing increasing pressure from consuming and contaminating activities. There is a growing awareness that the quantitative and qualitative preservation of groundwater resources is a global need, not only to safeguard their future use for public supply and irrigation, but also to protect those ecosystems that depend partially or entirely on groundwater to maintain their species composition and natural ecological processes. Known as groundwater dependent ecosystems (GDEs), they have been a fast-growing field of research during the last two decades. This book is intended to provide a diverse overview of important studies on groundwater and ecosystems, including a toolbox for assessing the ecological water requirements for GDEs, and relevant case studies on groundwater/surface-water interactions, as well as the role of nutrients in groundwater for GDEs and ecosystem dependence (vegetation and cave fauna) on groundwater. Case studies are from Australia (nine studies) and Europe (12 studies from nine countries) as well as Argentina, Canada and South Africa. This book is of interest to everybody dealing with groundwater and its relationship with ecosystems. It is highly relevant for researchers, managers and decision-makers in the field of water and environment. It provides up-to-date information on crucial factors and parameters that need to be considered when studying groundwater-ecosystem relationships in different environments worldwide.
