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Travel-Nature

Published on December 23, 2008

Author: aSGuest7867

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Advances in Ground Water Technology and Resource Assessment : Advances in Ground Water Technology and Resource Assessment William M. Alley Western States Water Council November 15, 2006 USGS Ground-Water Programs : USGS Ground-Water Programs Ground-Water Resources Program Cooperative Water Program National Research Program National Water-Quality Assessment Program Toxic Substances Hydrology Program Related Geology-Focused Programs National Cooperative Geol. Mapping Coastal and Marine Geology Crustal Imaging Outline : Outline Resource assessment Model development New field techniques Bringing multiple techniques and capabilities to address ground-water issues Slide 4: Ground-Water Resources Program Water Availability Studies Products : Products Water budgets of major aquifer systems Current estimates and historic trends in ground-water storage, recharge, and discharge Ground-water models that provide Regional context for more local studies Tool to make future projections of water availability Products (Cont.) : Products (Cont.) Estimates of key hydrologic variables (aquifer properties, recharge, and withdrawals) for major regional aquifers Evaluation of the existing network for monitoring ground-water availability Testing and evaluation of new approaches for analysis of regional aquifers Monitoring (Water Levels, Water Quality, Streamflow, Water Use) : Monitoring (Water Levels, Water Quality, Streamflow, Water Use) Integrated Monitoring and Modeling Slide 8: Principal Aquifers Source: U.S. Geological Survey National Atlas of the United States; http://nationalatlas.gov/atlasftp.html Outline : Outline Resource assessment Model development New field techniques Bringing multiple techniques and capabilities to address ground-water issues Recent Model Development : Recent Model Development MODFLOW Ground-water management FARM package Local-grid refinement Coupled ground-water/watershed modeling Parameter estimation and sensitivity analysis (JUPITER) SEAWAT SUTRA Simulation-Optimization Modeling of Tradeoffs Between Minimum Instream-Flow Criteria and GW Withdrawals : Simulation-Optimization Modeling of Tradeoffs Between Minimum Instream-Flow Criteria and GW Withdrawals (Granato and Barlow, 2005) Farm Process for MODFLOW(Schmid and others, 2006) : Farm Process for MODFLOW(Schmid and others, 2006) Local Grid Refinement(Mehl and Hill, 2006) : Local Grid Refinement(Mehl and Hill, 2006) Parent grid Child grid Interface GSFLOW—A basin-scale model for simulation of coupled Ground-water and Surface-water FLOW : GSFLOW—A basin-scale model for simulation of coupled Ground-water and Surface-water FLOW Infiltration Snow accumulationsnowmelt and runoff Stream Precipitation Outline : Outline Resource Assessment Model development New field techniques Bringing multiple techniques and capabilities to address ground-water issues Heat as a Tracer : http://pubs.water.usgs.gov/circ1260/ Heat as a Tracer Fiber Optic Sensing Technology : Fiber Optic Sensing Technology Continuous measurement over kilometers Temporal resolution = ~1 min Meter-scale spatial resolution ~0.1 ?C thermal resolution 25 yr sensor life (in-place) Waquoit Bay Study Area : Waquoit Bay Study Area Fiber-Optic Grid Boat house & control unit Additional temperature sensors (Hobos) attached for ground truth; seepage measurements; pore-fluid salinity measurements. Demonstration/Testing Projects : Demonstration/Testing Projects Workshop, mid-May Waquoit Bay (June, with MIT) USGS wells, Storrs, CT (July) Fish Creek, WY (July) Shenandoah R., VA (August) Allequash Creek, WI (August-September) San Pedro R., AZ (October) Slide 22: http://water.usgs.gov/ogw Outline : Outline Resource assessment Model development New field techniques Bringing multiple techniques and capabilities to address ground-water issues

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