Download or read book Isotopic Evaluation of Groundwater Recharge and Flow in Indian Wells Valley written by Jenny B. Chapman and published by . This book was released on 2020 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The isotopic composition of groundwater and surface water in and around Indian Wells Valley in southeastern California is used to evaluate the hydrologic conceptual model in terms of sources of groundwater recharge and the flow paths and ages of the groundwater. In 2019, the Groundwater Authority for Indian Wells Valley collected surface water and groundwater in Indian Wells Valley and analyzed the samples for hydrogen, oxygen, and carbon isotopes. Data collected was combined with data from other years and used to compare with current surface water that could be recharging the groundwater system. Shallow parts of the groundwater system appear to be recharging from surface water, however deeper parts of the system are more consistent with being from the Pleistocene epoch. The conceptual and numerical models of groundwater flow in Indian Wells Valley presented in the Groundwater Sustainability Plan are consistent with the isotopic results.
Download or read book A Water Geochemistry Study of Indian Wells Valley Inyo and Kern Counties California Supplement Isotope Geochemistry and Appendix H written by and published by . This book was released on 1990 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen and oxygen isotope data on waters of Indian Wells Valley, the Sierra, Rose Valley, and Coso thermal and nonthermal waters were studied. The isotope ratios of Sierran waters are a function of latitude with both ratios becoming depleted in the heavier isotopes from south to north. Assuming that groundwater recharge is from the Sierra, recharge areas for the various groundwater types can be designated. Hydrogen and oxygen isotopes do not uniquely define the recharge area for the Coso geothermal system but strongly suggest Sierran recharge with perhaps some local recharge. Sierran recharge is best supported by structural features and stream flow characteristics in the Sierra. Coso geothermal brines may have a component of waters from several different past pluvial periods, but the volume and midfield recharge rate of the system suggest continuous recharge.
Download or read book Characterizing Groundwater Recharge written by J. Moran and published by IWA Publishing. This book was released on 2004-01-01 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Use of Isotopic Data to Evaluate Recharge and Geologic Controls on the Movement of Ground Water in Las Posas Valley Ventura County California written by John A. Izbicki and published by . This book was released on 1997 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Recharge Analysis of the Indian Wells Basin California Using Geochemical Analysis of Tritium and Radiocarbon written by Kirsten E. Faulkner and published by . This book was released on 2018 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Quantifying recharge in arid watersheds, such as the Indian Wells Valley, CA, is critical for a reliable assessment of groundwater availability. In this study, lumped parameter models were coupled with tritium, radiocarbon, and helium data to generate groundwater ages. These ages were paired with (1) noble gas temperatures (NGTs) data to evaluate paleotemperature trends, and (2) well and aquifer parameters to calculate groundwater recharge rates. Age trends of NGTs reveal a complex climatic evolution within the Indian Wells Valley. Exponential trends between the point scale groundwater recharge rates and distance between the well and the mountain fronts of the basin translate to a mean mountain front recharge rate of 9.92 millimeters per year. These trends may be applicable in other arid settings where a lack of point scale data prevents a reliable estimation of recharge.
Download or read book An Isotopic Investigation of the Sources of Recharge to the Coachella Valley Aquifer System Riverside County California written by Frank W. diemel and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: For stakeholders in the Coachella Valley, the Coachella Valley Aquifer system is the main source of water, and has been under drawdown conditions since 1936. Presently, Coachella Valley water authorities import up to ~225,000 Af/y of Colorado River water to combat continued over-development. In this investigation, stable and radioisotopes of water and carbon in approximately 80 samples of combined spring, surface waters and well waters from the study area are used to contrast and compare a stable water isotope water-budget versus the water-budget of the USGS 1974 "Analog Model Study of the Ground-Water Basin of the Upper Coachella Valley, California". Stable water isotope data (n = 56) demonstrate springs, surface waters, and wells located in the San Jacinto and San Bernardino mountains plot as a Local Meteoric Water Line defined as Î4D = 8.7Îþ18O + 19.4. Hot and warm springs (n = 6) of the Cahuilla Nation in the Palm Canyon watershed define a regional evaporation trendline written as Î4D = 5.2Îþ18O - 21. Stable water isotopes suggest San Gorgonio and Mission Creek subbasins underflow comprise ~72% of the groundwater recharge to the Indio subbasin. Snowmelt runoff from the Whitewater River and Mission Creek watersheds along with mountain front runoff from the flanking watersheds of the San Jacinto and Santa Rosa mountains are other sources of recharge to the Indio subbasin. There is very little mixing of groundwater from the Desert Hot Springs subbasin with the Indio subbasin groundwater. Nested wells located at the Windy Point recharge facility demonstrate shallow wells have stable water isotope values similar to imported Colorado River water, deep wells having stable water isotope values similar to wells and low elevation springs located in the San Gorgonio subbasin, validating underflow as a major source of recharge. Stable water isotope values in mid-depth Windy Point nested wells demonstrate an ~ 40% to 60% imported Colorado River water versus native Whitewater River surface water mixture. Piper diagram analysis of major-ion concentrations demonstrate mixing of imported Colorado River water and Whitewater River surface water in mid-depth Windy Point wells. Chloride versus Sulfate analysis of three mid-depth Windy Point wells show an ~40% to ~60% mixture of imported Colorado River water and Whitewater River surface water validating the stable water isotope observations. There is little to no underflow contribution from the Whitewater River watershed to the Indio subbasin. The Analog Model overstates the Whitewater River watershed groundwater contribution to the Indio subbasin, and understates the Mission Creek groundwater contribution to the Indio subbasin. Wells located At the Windy Point recharge facility Stable water isotopes datum points suggest the groundwater contribution to the Indio subbasin from the San Gorgonio Pass subbasin is ~48%, and Mission Creek subbasin ~24%. Or, approximately 12864 Af/y, and 6336 Af/y, respectively.Îþ18O and Î4D, C14 and Tritium in sample waters suggest recharge to the Coachella Valley Aquifer system occurs mostly as winter precipitation as snow in the watersheds of the flanking Santa Rosa, San Jacinto and San Bernardino mountains; with limited recharge occurring on the Coachella Valley floor. Taken together, stable water isotopes and radioisotopes of sample waters provide water managers and Engineering Geologist inexpensive tools for tracing groundwater recharge and groundwater movement in a compartmentalized aquifer system.
Download or read book Isotopic Characterization of Groundwater Recharge and Flow in an Upland Bedrock Aquifer Vermont written by Michael David Abbott and published by . This book was released on 1997 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Quality and Environmental Isotopic Analyses of Ground water Samples Collected from the Wasatch and Fort Union Formations in Areas of Coalbed Methane Development written by Timothy T. Bartos and published by . This book was released on 2002 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of Environmental Isotope Methods for Groundwater Studies in the ESCWA Region Economic and Social Commission for Western Asia written by Wolfgang Wagner and published by Bundesanstalt Fur Geowissenschaften Und Rohstoffe. This book was released on 1999 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous hydrological projects have been carried out using isotopic methods over the last two decades in the ESCWA region, which includes the Arabian Peninsula, the Arabian countries to the north, and Egypt. The large amount of data obtained from groundwater samples has been evaluated together with the hydrogeological, hydrochemical and water management data available for the area. Analyses of the stable isotopes of oxygen, hydrogen, and carbon in the groundwater samples, as well as the naturally occurring radioactive isotopes of hydrogen and carbon are used for the localization of groundwater recharge areas; determination and quantification of mixtures of groundwater from different sources; reconstruction of groundwater flow systems on regional and local scales; determination of the paleoclimatic effects on the geohydraulic conditions; determination of groundwater ages, i.e., residence times; and distinguishing between renewable and fossil groundwater resources. Extensive hydrological studies using isotopic methods have been conducted in the ESCWA region on the following aquifer systems and topics: isotopic composition of precipitation in Jordan and Syria; groundwater turnover in karst aquifers in the highlands of western Jordan, the mountains in western Syria and the West Bank; groundwater recharge from precipitation and surface water on the Damascus plain; origin and age of groundwater in the basalt aquifer system in Jordan and Syria; recently recharged freshwater lenses and fossil groundwater in Badiye and Hamad (steppe and desert regions in Syria and eastern Jordan and the adjacent areas in Iraq and Saudi Arabia); low of fossil groundwater and local, recently recharged groundwater in Paleogene carbonate aquifers in eastern Saudi Arabia, the Golf region, and southern Oman; groundwater recharge from flash floods in the aquifers in unconsolidated rock in wadis and coastal plains of the Arabian Peninsula; age and origin of groundwater in aquifers in consolidated rock in the mountains of Oman. The discussion of the hydrogeological significance of isotope data is supplemented by comments on the most important current hydrogeological problems in the ESCWA region that could be investigated using isotopic methods. These include problems of groundwater recharge, the provenance of groundwater, groundwater flow systems on regional and local scales, paleohydrological conditions, and groundwater quality, particularly contamination by human activities. All available publications on the isotope hydrology of the ESCWA region are listed in the bibliography, as well as basic publications on isotope hydrology in arid regions. (Isotope geochemistry, isotope ratios, stable isotopes, O16, O18, O18/O16, C14, radioactive isotopes, iritium, absolute age, atmospheric precipitation, groundwater, currents, groundwater provinces, groundwater quality, sampling, groundwater recharge, climate, paleoclimate, aquifer, sandstone, limestone, dolomite, volcanic rocks, quaternary aquifer, unconsolidated sediments Bahrain, Jemen, Jordan, Lebanon, Qatar, Kuwait, Saudi Arabia, Syria, Oman, United Arabic Emirates)
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Isotopic and Biogeochemical Legacy of Groundwater written by Panthallookkaran Deljo Davis and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater environmental capacity and its evaluation index is the best approach to measure the impact of exploitation of groundwater resources and, pollution. The chemical and isotope tracers are essential tools for better understanding of groundwater origin, for quantifying water-rock interaction, mixing process and recharge rates, as well as for providing timescales of groundwater flow in groundwater systems, on large spatial and temporal scales. Measurements of isotopic composition of groundwater samples characterised by diversified signatures like seasonal variation, evaporation, water rock interaction or stratification with topography etc. In Southern India with dual monsoon influence, minor modification of the isotopic signal is expected during groundwater recharge. The present study covers a spectrum of subject components related to the ground water scenario of Bangalore city as influenced by the sewage network. The isotopic tool a sophisticated technique that can be used to confirm the changes taking place in the hydrological system.
Download or read book Using Stable Isotopes to Characterize the Groundwater Recharge in the Sierra Nevada Foothills California written by Nelson Ferney Bernal and published by . This book was released on 2007 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stable Isotope and Groundwater Flow Dynamics of Agricultural Irrigation Recharge Into Groundwater Resources of the Central Valley California written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Practical Isotope Hydrology written by S. M. Rao and published by New India Publishing. This book was released on 2006 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Indian context.
Download or read book A Survey of Methods for Analysing Groundwater Recharge in Arid and Semi arid Regions written by and published by . This book was released on 2002 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater in Ethiopia written by Seifu Kebede and published by Springer Science & Business Media. This book was released on 2012-08-01 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive description of groundwater resources in Ethiopia and its various dimensions (groundwater as resource, environmental functions, and socioeconomics). The prevailing knowledge of groundwater resources in Ethiopia (or elsewhere in Sub Saharan Africa) was based on geological and stratigraphic framework known nearly four decades ago (mainly 1960's and 70's). Thanks to the substantial geoscientific research since the 70's a new set of relevant geological/stratigrahpic data has been created that helps to re-define our understanding of groundwater resources in Africa as a whole and in Ethiopia in particular: a) For the first time the basement aquifer of Ethiopia has been described hydrogeologically based on genesis of regoliths (deep weathering and striping history); clear regional difference in groundwater potential is shown for the first time; comparative accounty has been given regarding groundwater occurrence in the generally low grade basement rocks of Ethiopia (Arabian Nubian shield) and high grade basement rocks of the rest of Africa. b) For the first time groundwater occurrence in multilayred sedimentary rocks account for spatial variation in degree of karstification; deformation history, and stratigraphy. c) The vast volcanic aquifers of Ethiopia which have previously classified based on their ages are now reclassified based on age, morphology (eg. groundwater in plateau volcanics, groundwater in shield volcanics) and aquifer structure. d) The loose alluvio lacustrine sediments which were known as least extensive in previous works based on areal cover are in fact shown to host the most voluminous groundwater resources in Ethiopia. These aquifers have now been described based on their geomorphology, extent, and genesis. The aim of this book is to use these newly created knowledge to redefine the understanding of groundwater resources in Ethiopia.
