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Book An Isotopic Investigation of the Sources of Recharge to the Coachella Valley Aquifer System Riverside County California

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.

Book Use of Isotopic Data to Evaluate Recharge and Geologic Controls on the Movement of Ground Water in Las Posas Valley Ventura County California

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:

Book Isotopic Evaluation of Groundwater Recharge and Flow in Indian Wells Valley

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.

Book Use Of Isotopic Data To Evaluate Recharge And Geologic Controls On The Movement Of Ground Water In Las Posas Valley Ventura County California U S Geological Survey Water Resources Investigations Report 97 4035 1997

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 U S Geological Survey Water Resources Investigations Report 97 4035 1997 written by and published by . This book was released on 1997* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Injection of Treated Wastewater for Ground water Recharge in the Palo Alto Baylands California Hydraulic and Chemical Interactions

Download or read book Injection of Treated Wastewater for Ground water Recharge in the Palo Alto Baylands California Hydraulic and Chemical Interactions written by Scott N. Hamlin and published by . This book was released on 1983 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Isotopic Investigation of Recharge to a Regional Groundwater Flow System Great Basin NV

Download or read book Isotopic Investigation of Recharge to a Regional Groundwater Flow System Great Basin NV written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater recharge processes were investigated in central Nevada by examining the relationships between the stable isotope ([delta]D and [delta]18O) compositions of snowfall, snowmelt, alpine spring waters, and regional groundwaters. Snowmelt infiltration is inferred to he the dominant source of groundwater recharge in this region. Bulk snow cores collected throughout central Nevada near the time of maximum accumulation have [delta]D and [delta]18O pairs that plot subparallel to the global meteoric water line (GMWL), but have negative d-values, implying kinetic isotope enrichments. Heavy isotope enrichments occur at the base of snowpacks due to fractionation during snow metamorphism, sometimes resulting in remarkably systematic isotopic variations. Ice crystals in the soil immediately beneath the snowpack can be strongly depleted in heavy isotopes relative to the overlying snow, implying fractionation or exchange with the snowpack. Late season ablation processes tend to homogenize isotopic variations between snowpack layers, and cause the bulk isotopic composition of the snowpack to become enriched in 18O by 2-3{per_thousand} relative to the composition during peak accumulation. The dynamic evolution of the snowpack and snowmelt isotopic compositions over time makes it difficult to directly ascertain groundwater recharge compositions without careful mass balance measurements. Preliminary evidence suggests that small local springs may be reasonable indicators of the integrated isotopic value of the snowmelt recharge in a particular area. Springs and snowmelt runoff samples collected throughout central Nevada during the peak runoff plot along a least squares regression line with the equation [delta]D = 7.3[delta]18O - 7, which is similar to the line obtained for 28 metamorphosed snow cores collected during peak accumulation ([delta]D = 7.5[delta]18O - 3). These results suggest that kinetic fractionation processes during snow metamorphism and ablation may largely account for the low d-values that are widely observed in groundwaters from both local and regional flow systems in Nevada.

Book Comparative Isotope Hydrology Study of Groundwater Sources and Transport in the Three Cascade Volcanoes of Northern California

Download or read book Comparative Isotope Hydrology Study of Groundwater Sources and Transport in the Three Cascade Volcanoes of Northern California written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Quaternary-age volcanic peaks of Mt. Lassen, Mt. Shasta, and Medicine Lake Volcano preferentially recharge and transport large volumes of annual precipitation into mega- scale channels hosted in underlying volcanic layers. At the terminus of laterally extensive lava flows, or in deep incisions of these layers, groundwater emerges as large volume cold springs. The combined discharge of these springs contributes half the annual storage capacity of Shasta Reservoir, and is utilized to generate 2000 gigawatts of hydroelectric power each year. Moreover, the springs provide a natural habitat for many rare and endangered species. In the Hat Creek Valley, located north of Mt. Lassen, Rose et al. (1996) showed that the low d 18 O discharge of large volume springs at Rising River and Crystal Lake originates from snow melt in the high elevation, high precipitation region surrounding Lassen Peak. Groundwater transport in this basin is enhanced by the occurrence of the Quaternary Hat Creek basalt flow, which extends nearly the entire length of Hat Creek Valley. In contrast, the d 18 O values of large- volume springs that discharge in the Mt. Shasta region indicate a larger percentage of local recharge at lower elevations since the high elevation snow melt on the volcano is depleted by>1 per mil relative to the largest springs. The d 18 O value of the Fall River Springs (FRS) system is similar to small springs that occur at high elevations on Medicine Lake Volcano. The large volume of the FRS discharge coupled with a lack of surficial drainages in this area indicates that a large percentage of the annual precipitation over an750 mi 2 area of the Medicine Lake volcanic plateau goes to recharge the FRS aquifer system. Groundwater transport to the FRS is enhanced by the occurrence of the 10 kyr Giant Crater lava flow, a single geologic unit that extends from the base of Medicine Lake Volcano to the FRS.many of the large volume springs in the southern Cascade Range. For example, the radiocarbon concentration in Rising River Springs is 80 pmc, which indicates at least 20% of its dissolved inorganic carbon is derived from a magmatic source in the Lassen region. The radiocarbon activity in the FRS is as low as 73 pmc, indicating a minimum contribution of 27% magmatic CO2 from Medicine Lake volcano. Magmatic CO2 fluxes in the Shasta region are highest around the base of the volcano, where low- volume, CO2 -rich,14 C- absent soda springs occur. Relatively large quantities of magmatic CO2 are observed in the Big Springs of the McCloud River, which have a d 18 O signature consistent with low elevation recharge in the Shasta region.relative to Mt. Lassen and Medicine Lake Volcano reflect significant differences in the geomorphology of the volcanoes. In particular, the composite nature of the Shasta stratocone tends to limit the depth of groundwater recharge, confining the majority of groundwater flow to the shallowest layers, which tend to be of more local extent. The lower permeability of the composite cone also acts as a trap for magmatic CO2 emissions, generally limiting the gas discharge to localized fracture zones at lower elevations. At Mt. Lassen and Medicine Lake Volcano, groundwater recharge occurs primarily at high elevations, along vertical fracture systems with high permeabilities. These features, combined with laterally extensive basalt flows, act to focus groundwater transport deeper and over longer lateral distances. The magmatic CO2 dissolution process probably occurs in close proximity to the geothermal systems at Lassen and Medicine Lake, where CO2 gas escaping along deep fractures encounters downward percolating groundwater.

Book Chemistry and Isotopic Composition of Ground Water Along a Section Near the Newmark Area San Bernardino County California

Download or read book Chemistry and Isotopic Composition of Ground Water Along a Section Near the Newmark Area San Bernardino County California written by John A. Izbicki and published by . This book was released on 1998 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Isotopic Discrimination of Aquifer Recharge Sources Subsystem Connectivity and Flow Patterns in the South Fork Palouse River Basin Idaho and Washington USA

Download or read book Isotopic Discrimination of Aquifer Recharge Sources Subsystem Connectivity and Flow Patterns in the South Fork Palouse River Basin Idaho and Washington USA written by Kyle A. Duckett and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Artificial Recharge Yucaipa California

Download or read book Artificial Recharge Yucaipa California written by Joe A. Moreland and published by . This book was released on 1970 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Final Report on Isotope Tracer Investigations in the Forebay of the Orange County Groundwater Basin

Download or read book Final Report on Isotope Tracer Investigations in the Forebay of the Orange County Groundwater Basin written by M. Davisson and published by . This book was released on 2003 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: California is currently faced with some critical decisions about water resource infrastructure development in highly urbanized regions, whose outcome will dictate the future long-term viability of plentiful water. Among these is developing and safely implementing the reuse of advanced treated waste water. One of the most reliable strategies for this water resource is its indirect reuse via groundwater recharge and storage, with particular emphasis on supplementing annual water demand or during drought relief. The Orange County Water District (District) is currently implementing the first phase of a large-scale water reuse project that will advance-treat up to 60 million gallons per day of waste water and recharge it into existing percolation basins in the Forebay region of the Orange County groundwater basin. In order for the District to protect public health, the fate and potability of this recharged waste water needs to be understood. In particular, the direction and rates of flow into underlying aquifers need to be characterized so that changes in water quality can be quantified between the recharge basins and points of production. Furthermore, to ensure compliance to California Department of Health Services (DHS) draft regulations, the direction and rate of recharged waste water from these basins need to be understood to sufficient detail that small mixtures can be delineated in monitoring and production wells. Under proposed DHS guidelines, consumptive use of recycled water is permissive only if its residence time in an aquifer exceeds a specified six-month time-frame. DHS guidelines also limit the percentage of recycled water at production wells. However, attaining such detail using current hydrogeological and computer-assisted modeling tools is either cost-prohibitive or results in uncertainties too large to achieve regulatory confidence. To overcome this technical barrier, the District funded Lawrence Livermore National Laboratory (LLNL) from 1995-2001 to directly measure groundwater ages and perform two artificial tracer studies using isotope methods to quantify flowpath directions, groundwater residence times, and the rate and extent of recharge water and groundwater mixing. In addition, Jordan Clark at University of California, Santa Barbara also performed an artificial tracer experiment using sulfur-hexafluoride, whose results have been integrated into the LLNL findings.