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Analytical And Numerical Simulation Of The Steady State Hydrologic Effects Of Mining Aggregate In Hypothetical Sand And Gravel And Fractured Crystalline Rock Aquifers
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Book Synopsis Analytical and Numerical Simulation of the Steady-state Hydrologic Effects of Mining Aggregate in Hypothetical Sand-and-gravel and Fractured Crystalline-rock Aquifers by : L. R. Arnold
Download or read book Analytical and Numerical Simulation of the Steady-state Hydrologic Effects of Mining Aggregate in Hypothetical Sand-and-gravel and Fractured Crystalline-rock Aquifers written by L. R. Arnold and published by . This book was released on 2003 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analytical and Numerical Simulation of the Steady-state Hydrologic Effects of Mining Aggregate in Hypothetical Sand-and-gravel and Fractured Crystalline-rock Aquifers by : L. R. Arnold
Download or read book Analytical and Numerical Simulation of the Steady-state Hydrologic Effects of Mining Aggregate in Hypothetical Sand-and-gravel and Fractured Crystalline-rock Aquifers written by L. R. Arnold and published by . This book was released on 2003 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water-resources Investigations Report by : George S. Law
Download or read book Water-resources Investigations Report written by George S. Law and published by . This book was released on 2002 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water-resources Investigations Report by :
Download or read book Water-resources Investigations Report written by and published by . This book was released on 2002 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrating Field and Modeling Studies to Assess the Response of a Lake-groundwater System to Mining Activities by : Tyler Lee Tauscher
Download or read book Integrating Field and Modeling Studies to Assess the Response of a Lake-groundwater System to Mining Activities written by Tyler Lee Tauscher and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mining of aggregate is vital to preparing concrete and building constructions; however, there are some known impacts that aggregate mining can cause on both hydrologic and ecological systems. This study incorporates field and modeling studies to understand the potential influence of mining on groundwater and surface-water interacting hydrologic systems. The study site is an active, 265-acre mining site located in Washtenaw County, Michigan, which has two artificial lakes. The goal was to develop a three-dimensional hydrologic model, HydroGeoSphere (HGS), for the mining site and apply it to evaluate the impacts of mining activities such as quarry expansion and dewatering on local groundwater and surface-water systems. To protect the wetlands around the area, there was a desire to maintain a stable water surface elevation for the Lakes throughout the expansion. The model was used to simulate both surface and subsurface waters in the site and their hydrologic dynamics as responses to weather or climatic variations and mining expansions described above, which changed the lake bathymetry. The model domain encompassed 2,038 acres of land, which has a pseudo rectangle shape bounded by the Raisin River being the boundary on the east side and no-flow boundaries along the remaining three sides. The model used a finite-element mesh generated with AlgoMesh software, which consists of nine vertical layers and a total of 2778 nodes and 5177 elements. Primary input data to the HGS model include land-surface elevations, weather data (daily precipitation and temperature) obtained from a nearby weather station, potential evapotranspiration values calculated with a Penman-Monteith method and geology and bathymetry data from field investigations. The model was satisfactorily calibrated against water level data observed in the two lakes and four water-table monitoring wells, spanning a period from January 2018 to December 2020. After calibration, the model was used to explore how the mining expansion would affect the hydrology on site. Specifically, influences of three hypothetical vertical expansions (5 m. 10 m, and 15 m) along with the same horizontal expansion of 46-acres in the active mining site were tested. Simulation results show that the expansions of all three scenarios would not cause dramatic changes on either the surface-water or groundwater levels in the vicinity. Specifically, the deepest 15-m vertical expansion would only lower the water levels by 0.03 m and 0.28 m in the two lakes and 0.19-0.32 m in four monitoring wells, suggesting a limited or insignificant impact of mining expansion on the groundwater resources and wetlands.
Book Synopsis Numerical Simulation of Ground-water Flow Through Glacial Deposits and Crystalline Bedrock in the Mirror Lake Area, Grafton Gounty, New Hampshire by : Claire R. Tiedeman
Download or read book Numerical Simulation of Ground-water Flow Through Glacial Deposits and Crystalline Bedrock in the Mirror Lake Area, Grafton Gounty, New Hampshire written by Claire R. Tiedeman and published by . This book was released on 1997 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Boundary Conditions on Steady-state Response of Three Hypothetical Ground-water Systems - Results and Implications of Numerical Experiments by : Geological Survey (U.S.)
Download or read book Effects of Boundary Conditions on Steady-state Response of Three Hypothetical Ground-water Systems - Results and Implications of Numerical Experiments written by Geological Survey (U.S.) and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific Investigations Report by : Sharon E. Kroening
Download or read book Scientific Investigations Report written by Sharon E. Kroening and published by . This book was released on 2004 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Doina Maria Priscu Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 : Total Pages :202 pages Book Rating :4.:/5 (428 download)
Book Synopsis Double-porosity Modelling of Groundwater Flow Through Fractured Rock Masses [microform] by : Doina Maria Priscu
Download or read book Double-porosity Modelling of Groundwater Flow Through Fractured Rock Masses [microform] written by Doina Maria Priscu and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1997 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: "One of the key factors in ensuring safe slopes in open pit mines is the control of the groundwater flow within the slope. When analyzing the flow regime and its characteristics, traditional numerical methods designed for soil-like materials may not always apply. In the present thesis, the two-dimensional finite element code FlowD was developed to analyze steady-state seepage through fractured rock masses, under saturated conditions. The program provides the user with two modelling options: porous (soil) materials, or fractured rock masses. The double-porosity model was incorporated in the code, in order to better model flow through anisotropic, heterogeneous fractured rock masses, where Dirichlet and Neumann boundary conditions can apply. FlowD program calculates total pressure head, flow gradients and velocities within the specified domain. Drains, drainage galleries and wells, as well as aquifer recharge can be simulated. A real large-scale case study, with complex geological features has been simulated in order to demonstrate the application of the double porosity model. Three different scenarios have been modeled for the same slope, which are natural groundwater regime, vertical well simulation, and drainage galleries simulation. The results show good agreement with the predictions of both the consultant and the mine's engineering division." --
Book Synopsis Discrete-Fracture Dual-Permeability Simulation of Heterogenous Drawdown in the Brunswick Group, North Penn 6 Superfund Site, Landsdale, Pennsylvania by : Jarrett Elsea
Download or read book Discrete-Fracture Dual-Permeability Simulation of Heterogenous Drawdown in the Brunswick Group, North Penn 6 Superfund Site, Landsdale, Pennsylvania written by Jarrett Elsea and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquifer pumping tests conducted by the U.S. Geological Survey (USGS) at the John Evans Site (North Penn 6 Superfund Site, Lansdale, PA) produced anomalous water level changes in observations wells. In some observations wells, changes were not radially symmetric, and more distant wells had greater drawdown than proximal wells. Triassic sandstones and shales at the site are tilted, and contain a large number of fractures, which may affect groundwater movement. Therefore, the computer code FRAC3DVS, which allows simulation of fractures, was used to develop a conceptual model of these anomalies, which was generally consistent with hydrogeologic properties. Both steady state and transient models were constructed. Hydrologic properties and the number, location, orientation, and aperture of fractures were varied in order to simulate the results of the aquifer pumping test. The steady state modeling showed that the range of influence of a few connected fractures created deviations in the flow field on the scale of 10s of meters, similar to the site scale. Thus a simplified network of fractures was used to model the flow anomalies. Five transient simulations from the site-specific model are presented to demonstrate the calibration process and goodness of fit. The best fit, having a root mean square error of 0.07 m, was obtained using a model with three continuous dipping fracture sets with an aperture of 1.0E-4 m and a matrix hydraulic conductivity of 1.2E-9 m/s. The transient modeling showed that anomalies were produced when tilted fractures that only intersect some wells are used and when the contrast between the fracture and matrix hydraulic conductivity is high.
Book Synopsis Regional Aquifer-system Analysis by : David E. Prudic
Download or read book Regional Aquifer-system Analysis written by David E. Prudic and published by . This book was released on 1998 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Isotopes in Hydrogeology by : Ian D. Clark
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
Download or read book Soil Screening Guidance written by and published by . This book was released on 1996 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Impoundment Assessment written by and published by . This book was released on 1984 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water Quality Assessments by : Deborah V Chapman
Download or read book Water Quality Assessments written by Deborah V Chapman and published by CRC Press. This book was released on 1996-08-22 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guidebook, now thoroughly updated and revised in its second edition, gives comprehensive advice on the designing and setting up of monitoring programmes for the purpose of providing valid data for water quality assessments in all types of freshwater bodies. It is clearly and concisely written in order to provide the essential information for all agencies and individuals responsible for the water quality.
Book Synopsis Water in Road Structures by : Andrew Dawson
Download or read book Water in Road Structures written by Andrew Dawson and published by Springer Science & Business Media. This book was released on 2008-10-21 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Only book world-wide addressing this topic. The principal output of the European co-operative Action on "Water Movements in Road Pavements & Embankments". Provides unique guidance on assessing water condition and its affects on road performance. Provides unique guidance on assessing and ameliorating contaminant movement in pavement groundwater. Written by leading experts in Europe.
Book Synopsis Contaminants in the Subsurface by : National Research Council
Download or read book Contaminants in the Subsurface written by National Research Council and published by National Academies Press. This book was released on 2005-04-23 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: At hundreds of thousands of commercial, industrial, and military sites across the country, subsurface materials including groundwater are contaminated with chemical waste. The last decade has seen growing interest in using aggressive source remediation technologies to remove contaminants from the subsurface, but there is limited understanding of (1) the effectiveness of these technologies and (2) the overall effect of mass removal on groundwater quality. This report reviews the suite of technologies available for source remediation and their ability to reach a variety of cleanup goals, from meeting regulatory standards for groundwater to reducing costs. The report proposes elements of a protocol for accomplishing source remediation that should enable project managers to decide whether and how to pursue source remediation at their sites.
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