Characterizing Groundwater Recharge
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Characterizing Groundwater Recharge
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Author : J. Moran
language : en
Publisher: IWA Publishing
Release Date : 2004-01-01
Characterizing Groundwater Recharge written by J. Moran and has been published by IWA Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-01-01 with Science categories.
The purpose of the project was to demonstrate the value of age-dating and isotopic tracers in characterizing the flow dynamics and water quality changes in a complex groundwater domain that includes high capacity municipal pumping wells, a geologic fault, and artificial recharge facilities with deep lake-like recharge ponds. Characterizing water quality changes during recharge and transport in groundwater was also an objective of this investigation. Below (west of) the Hayward Fault (BHF), water ages correlated well with aquifer layer sequence. BHF tracers did not reach the BHF wellfield within the time frame of the experiment. Above (east of) the fault, (AHF) tracers reached the targeted wellfield in only 60 days, indicating substantial heterogeneity and a fast travel time along preferential pathways compared to the average travel time of 2+ years indicated by age-dating and more classical estimating methods. A reconnaissance of water quality, conducted concurrently with the tracer studies, suggested certain water quality improvements occurring in either the pond sediment or the near-pond aquifer media. Variations in groundwater age depended on location and depth. A survey of natural isotopes indicated mixing of young and older water in wells, increasing age with depth of aquifer layer, and possible dissolution of carbonate minerals. AHF tracer experiments, along with other analysis, suggested that tracers probably percolated preferentially at shallow depths in the pond near the shoreline. Much of the tracer remained in deep pond water over time, increasing residence time in down-gradient wells. The tracer studies provided evidence of preferential pathways and heterogeneity in the AHF aquifer and a fast minimum travel time to the AHF wellfield. The tracer added to BHF ponds was detected in just two monitoring wells, but not at the BHF wellfield over the 10-month period. An AHF tracer from a small pond spanning the fault did, however, appear at the BHF wellfield. BHF pond water flows mainly to distal portions of the groundwater basin, or reaches the wellfield over a slow, circuitous route. Originally published by AwwaRF for its subscribers in 2003 This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below
Characterizing Groundwater Recharge Processes In A Semiarid Mountain Front Using Stable Isotopes Hydrochemistry And Heat As A Tracer Ourika Basin Tensift Central Morocco
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Author : Houssne Bouimouass
language : en
Publisher:
Release Date : 2021
Characterizing Groundwater Recharge Processes In A Semiarid Mountain Front Using Stable Isotopes Hydrochemistry And Heat As A Tracer Ourika Basin Tensift Central Morocco written by Houssne Bouimouass and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Mountaifront recherge is the recharge of grounwater occuring in the piedmonts of high-elevation mountain often receiving more precipitation due to orographic effects. This type of recharge is the major source of groundwater replenishment in many semi(arid) basins. The Tensift basin in central Morocco hosts the large alluvial plain of Haouz with its vast pheatic aquifer of more than 6000 km2. groundwater in the Haouz plain is the main source of water for the socio-economic activities in the area. This groundwater originates from the adjacent high-Atlas ranges. Despite the importance of mountain-front recharge for the socio-economic development in the area, it was never investigated with care but only incorporate in a very limited regional-scale studies providing highly speculative conclusions. The aims of the present study is the close investigation of recharge sources in the mountain-front area of the High-Atlas of Marrakech at the local scale, with an emphasis on infiltration within wadi channels. Hydrophysical data (piezometry, sediment water content and heat), hydrochemical (major ions) and environmental tracers (stable isotopes of water) from field campaigns and experiments were used in this study. The data acquired was analyzed by analytical methods and modeling (heat transport modeling). Coupled groundwater fluctuation measurements and environmental tracers (18O, 2H, and major ions) were used to identify and compare the natural mountain-front recharge to the anthropogenic irrigation recharge. Within the High-Atlas mountain front of the Ourika Basin, Central Morocco, the groundwater fluctuation mapping from the dry to wet season showed that recharge beneath the irrigation area may be higher than recharge along the streanbed. A conceptual model of seasonal groundwater recharge sources in the study area was established. Theses findings highlight that irrigation practices can result in the dominant mountain front racharge process for groundwater. The hydrochemical evolution of groundwater in the mountain-front area is controlled mainly by water-rock interactions through mineral dissolution, silicate weathering and ion exchange. The strong relationship between groundwater and mountain water, enhanced by traditional irrigation, and the ecological agriculture practiced in the area preserved the excellent quality of groundwater. Streambed water content and temperature were continuously logged over a year for the Rheraya intermittent wadi. Over the entire year, the calculated total potential recharge based on heat transfer modeling was 425 mm/m2. During winter and spring when the alluvium has a higher water moisture, this recharge is predominantly generated by floods. Normal streamflow generally generates low infiltration but contributes to wetting the sediment. During the summer, brief flashfloods over dry sediment result in shallower and slow wetting from infiltration, despite of their higher peak streamflow. Results from this study can be incorporated in future management schemes for the water resources preservation in the Tensift basin.
Groundwater Recharge And Flow
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Author : National Academies of Sciences, Engineering, and Medicine
language : en
Publisher: National Academies Press
Release Date : 2020-01-17
Groundwater Recharge And Flow written by National Academies of Sciences, Engineering, and Medicine and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-17 with Science categories.
Water of appropriate quantity and quality is essential for drinking, sanitation, and food, energy, and industrial production for any society and is derived for most needs from surface- or groundwater sources. Studies suggest that groundwater use in irrigation globally is increasing in total volume as well as a percentage of all water used for irrigation, with the demand for groundwater resources increasing as available primary surface water supplies are depleted. Particularly in arid regions, groundwater may be the most accessible water supply for any purpose, leaving groundwater withdrawals concentrated in areas that are already experiencing water stress. Even in the presence of direct ground observations and measurements of the water table, quantitative evaluation of groundwater storage, flow, or recharge at different scales requires remotely sensed data and observations applied to groundwater models. Resolving the interaction of groundwater storage, flow, and recharge at a scale at which basins are managed requires remotely sensed data and proxy data. In June 2019, the Water Science and Technology Board of the National Academies of Sciences, Engineering, and Medicine convened a workshop to identify scientific and technological research frontiers in monitoring and modeling groundwater recharge and flow in various regions of the world. The goals of the workshop were to assess regional freshwater budgets under major use scenarios, including agriculture, industry, and municipal; examine state of the art research frontiers in characterizing groundwater aquifers, including residence time, quantity, flow, depletion, and recharge, using remotely sensed observations and proxy data; discuss groundwater model uncertainties and methods for mitigating them using sparse ground observations or data and other approaches; and consider our ability to detect which water management strategies that affect groundwater flow and recharge are being used and any changes in their use over time. This publication summarizes workshop presentations and plenary discussions.
Characterizing Groundwater Recharge And Streamflow Using Stable Isotopes Of Oxygen And Hydrogen
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Author : Chanse M. Ford
language : en
Publisher:
Release Date : 2016
Characterizing Groundwater Recharge And Streamflow Using Stable Isotopes Of Oxygen And Hydrogen written by Chanse M. Ford and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Potential changes to climate and precipitation patterns from anthropogenic influences like global climate change could have an impact on Michigan’s groundwater resources. Indirectly this could have an effect on Michigan’s surface waters as well, since groundwater and surface waters are intimately linked to form one system. This investigation utilized stable isotopes of oxygen and hydrogen found in precipitation, groundwater and surface waters to better understand the contribution of different types of precipitation to recharge of a shallow aquifer in Manistee National Forest, MI. The study also examines the contribution of this shallow groundwater to streamflow in the nearby White River. When combined with various physical and chemical hydrologic approaches, the dynamics of precipitation, groundwater flow and groundwater discharge into the stream become clearer. Samples from the different waters were collected from February 2015 to January 2016. During sampling groundwater head, stream discharge and other parameters were measured. These data provide valuable insight that will help the U.S. Forest Service better manage this natural resource.
Phreatology
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Author : Okke Batelaan
language : en
Publisher:
Release Date : 2006
Phreatology written by Okke Batelaan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Characterizing Groundwater Flow Dynamics And Storage Capacity In An Active Rock Glacier
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Author : Simon Seelig
language : en
Publisher:
Release Date : 2022
Characterizing Groundwater Flow Dynamics And Storage Capacity In An Active Rock Glacier written by Simon Seelig and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
Alpine aquifers play a critical role in the hydrology of mountainous areas by sustaining base flow in downstream rivers during dry periods and retarding flood propagation after heavy precipitation events. Progressing climate change alters climatic and meteorological boundary conditions as well as the hydraulic response of alpine catchments by ablating glaciers and thawing permafrost. Rock glaciers exert a controlling influence on the catchment response due to their prominent groundwater storage and complex drainage characteristics. This thesis investigates the hydrogeology and internal structure of the active rock glacier Innere Ölgrube (Ötztal Alps), which governs catchment runoff and is affected by permafrost degradation. A 3D geometrical model of its internal structure is obtained by combining geophysical data and permafrost creep modelling. Available data and new results are integrated into a conceptual hydrogeological model providing a sound basis for the implementation of a prospective numerical groundwater flow model. Hydraulic properties of the hydrostratigraphic units constituting the rock glacier are estimated and groundwater recharge fluxes quantified. Fundamental properties of the heterogeneous groundwater flow system within the rock glacier are discussed and compared to existing rock glacier studies. About the author Simon Seelig is currently working on alpine water resources and climate change as PhD student at the University of Graz, Austria. His educational background is geosciences, focusing on hydrogeology and engineering geology at the Universities of Graz, Leoben, and Waterloo (ON).
Using Stable Isotopes To Characterize The Groundwater Recharge In The Sierra Nevada Foothills California
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Author : Nelson Ferney Bernal
language : en
Publisher:
Release Date : 2007
Using Stable Isotopes To Characterize The Groundwater Recharge In The Sierra Nevada Foothills California written by Nelson Ferney Bernal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Groundwater recharge categories.
Aquifer Characterization Techniques
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Author : Robert G. Maliva
language : en
Publisher: Springer
Release Date : 2016-05-26
Aquifer Characterization Techniques written by Robert G. Maliva and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-05-26 with Science categories.
This book presents an overview of techniques that are available to characterize sedimentary aquifers. Groundwater flow and solute transport are strongly affected by aquifer heterogeneity. Improved aquifer characterization can allow for a better conceptual understanding of aquifer systems, which can lead to more accurate groundwater models and successful water management solutions, such as contaminant remediation and managed aquifer recharge systems. This book has an applied perspective in that it considers the practicality of techniques for actual groundwater management and development projects in terms of costs, technical resources and expertise required, and investigation time. A discussion of the geological causes, types, and scales of aquifer heterogeneity is first provided. Aquifer characterization methods are then discussed, followed by chapters on data upscaling, groundwater modelling, and geostatistics. This book is a must for every practitioner, graduate student, or researcher dealing with aquifer characterization .
Isotopic Characterization Of Groundwater Recharge And Flow In An Upland Bedrock Aquifer Vermont
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Author : Michael David Abbott
language : en
Publisher:
Release Date : 1997
Isotopic Characterization Of Groundwater Recharge And Flow In An Upland Bedrock Aquifer Vermont written by Michael David Abbott and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Aquifers categories.
Characterizing Groundwater Surface Water Interactions In Great Smoky Mountains National Park Using Hydrologic Geochemical Isotopic Data
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Author :
language : en
Publisher:
Release Date : 2007
Characterizing Groundwater Surface Water Interactions In Great Smoky Mountains National Park Using Hydrologic Geochemical Isotopic Data written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Great Smoky Mountains National Park (N.C. and Tenn.) categories.
Groundwater-surface water interactions can substantially influence the quality of surficial water bodies and are thus important when investigating ecological health of and climate change impacts on an area. However, data collection can be hindered when the location is remote and/or legally protected. This paper presents a methodology to implement minimallyinvasive field techniques at a remote and protected location that allows preliminary identification of the relationship between groundwater and surface water. Great Smoky Mountains National Park was selected as the study area as it is subjected to some of the highest rates of acid deposition in the country. Ecological damage is evident in several areas, including Ramsay Prong, a typical fourth-order stream located on the Tennessee side of the park. Ramsay Prong is evaluated on the basis of discharge, water quality, geochemistry, and stable isotopes at six points along the channel. It should be noted that increasing drought conditions occurred in the basin over the course of this study, providing an opportunity to evaluate the situation of low baseflow. Results indicate that storage capacity in the headwaters is insufficient to supply typical baseflow volume during extended dry periods, whereas sufficient alluvium exists at the bottom of the catchment to capture and recharge the basin water supply. A shallow fracture network likely provides long flowpaths for water to travel toward the basin bottom. Furthermore, baseflow is supplied by interflow as well as shallow groundwater storage; the portion of baseflow comprised by interflow increases with increasing antecedent precipitation. Diffuse groundwater recharge occurs mainly in the headwaters where steep slopes dominate the topography, while focused recharge occurs in bedrock depressions within the reaches and at the end of the channel. These observations, coupled with geochemical and isotopic data, indicate that neutralization of acidic inputs is best accomplished in the lower elevations of the basin. It is recommended that future studies investigate the ecological impacts of reduced precipitation in terms of acid neutralization capabilities along Ramsay Prong.