Displaying Modeling Related Reports

Title: Robust Representation of Dry Cells in MODFLOW
Description:
Documentation and testing of MODFLOW-NR to improve method for dealing with dry cells in modeling the Edwards Aquifer
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Title: Simulated Impacts Associated with the Cibolo Creek Transfers Using MODFLOW-NR and Senate Bill 3 Assumptions
Description:
Tests of MODFLOW-NR and Senate Bill 3 assumptions on springflow in the Edwards Aquifer Balcones Fault Zone San Antonio Segment
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Title: Evaluation of the Aquifer and Springflow Impacts Associated with the Cibolo Creek Transfer Rules
Description:
Use of data and modeling to determine effects on springflow in Comal and San Marcos Springs from Cibolo Transfers (transfers of permits from Bexar to eastern counties)
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Title: Evaluation of the Edwards Aquifer in Kinney and Uvalde Counties, Texas
Description:
Development of an updated conceptual model in the Edwards Aquifer for the Kinney County and Uvalde Pools and the relationship of the latter to the San Antonio Pool
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Title: Analysis of Recharge and Recirculation Edwards Aquifer Phase 1
Description:
Testing the MODFLOW model with historical data of recharge and recirculation at two hypothetical recharge sites prior to release of the model
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Title: Analysis of Recharge and Recirculation Edwards Aquifer Phase 2
Description:
Use of the MODFLOW model to examine recharge at eight sites in the Edwards Aquifer and discharge at San Marcos Springs
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Title: Recharge and Recirculation / Edwards Aquifer Optimization Program Phase III / IV Report Final
Description:
Continued and final analyses using improved flow model and recent agency rules for optimizing recharge and streamflow in the Edwards Aquifer
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Title: Structural Controls on the Edwards Aquifer/Trinity Aquifer Interface in the Camp Bullis Quadrangle, Texas
Description:
Structural analyses for geologic framework model of the area around the intersection of the Edwards and Trinity Aquifers
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Title: Conduits and Turbulent Flow in the Edwards Aquifer
Description:
Description of the Edwards Aquifer Balcones Fault Zone as a typical karst aquifer and recommendations for locations of conduits in the MODFLOW model
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Title: Refining the Conceptual Model for Flow in the Edwards Aquifer—Characterizing the Role of Fractures and Conduits in the Balcones Fault Zone Segment
Description:
Hydrogeologic study using existing data on role of fractures and conduits in groundwater flow in the recharge and artesian zones of the Edwards Aquifer Balcones Fault Zone
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Title: Pilot Recharge Models of the Nueces and Blanco River Basins
Description:
Pilot study to develop HSPF improvement of the MODFLOW study for recharge in the Blanco and Nueces River Basins
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Title: Recharge Enhancement Study Guadalupe-San Antonio River Basin Volume I-Executive Summary
Description:
Development of the GSA Model to estimate recharge to the Edwards Aquifer from the San Antonio and Guadalupe River basins and effects of additional recharge structures
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Title: Recharge Enhancement Study Guadalupe-San Antonio River Basin Volume III-Appendices
Description:
Appendices to Recharge Enhancement Study Guadalupe-San Antonio River Basin. See companion documents.
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Title: Recharge Enhancement Study Guadalupe-San Antonio River Basin Volume II-Technical Report
Description:
Technical Report for Recharge Enhancement Study Guadalupe-San Antonio River Basin. See companion documents.
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Title: Edwards/Glen Rose Hydrologic Communication, San Antonio Region, Texas
Description:
Hydrogeological and modeling study of transmissivity between the Glen Rose and Edwards aquifers in the Cibolo Creek Basin and Guadalupe River
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Title: Edwards Aquifer Storage Assessment, Kinney County to Hays County, Texas
Description:
Core- and log-based stratigraphic study of permeability, porosity and storativity in the Edwards Aquifer
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Title: Edwards Aquifer Parameter Estimation Project: Final Report
Description:
Revision 3 of the hydraulic conductivity model using spatial statistics and various hydrological data calibrated to steady-state hydraulic head measurements and partially calibrated to steady-state spring discharges, for manual calibration of the model and as a basis for fully automated calibrations. This study is included for historical value and may have been supplanted by more recent ones.
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Title: Conceptualization and Simulation of the Edwards Aquifer, San Antonio Region, Texas
Description:
A new ground-flow model for the San Antonio and Barton Springs segments in the San Antonio region. Note: this document is included for its historical value and may have been replace by more recent updates.
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Title: Trans-Texas Water Program West Central Study Area Phase II Guadalupe-San Antonio River Basin Model Modifications & Enhancements
Description:
Modifications and enhancements for the Guadalupe-San Antonio River Basin Model (GSA Model) for the Trans-Texas Water Program West Central Study Area Phase II Note: This report is included for its possible historical value but has been replaced by the Texas Water Plan.
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Title: Trans-Texas Water Program West Central Study Area Phase II Guadalupe-San Antonio River Basin Environmental Criteria Refinement
Description:
Modeling, summary of biological studies, and sensitivity analyses to support refinement of environmental criteria for the Trans-Texas Water Program West Central Study Area Phase II Guadalupe-San Antonio River Basin Note: This report is included for its possible historical value but has been replaced by the Texas Water Plan.
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Title: Trans-Texas Water Program West Central Study Area Phase II Population, Water Demand and Water Supply Projections
Description:
Projections for population and water demand from 1990-2050 for the 1998 Trans-Texas Water Program West Central Study Area Phase II Note: This report is included for its historical value but has been replaced by more recent studies.
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Title: Potential for Updip Movement of Salinewater in the Edwards Aquifer, San Antonio, Texas
Description:
Modeling the shift of the freshwater-saline water interface under various conditions over a 10-year period
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Title: Enhanced Characterization and Representation of Flow through Karst Aquifers-Phase II Revision 1
Description:
Development and testing of the MODFLOW DCM version 2.0 model for karst aquifers
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Title: Appendix B A Report Investigating Impacts of Aquifer Pumping Limits on Flow of Comal Springs and San Marcos Springs
Description:
Use of GWSIM-IV model to determine effects of various pumpage reductions on springflow at Comal and San Marcos Springs
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Title: Hydrogeology, Hydrologic Budget and Water Chemistry of the Medina Lake Area, Texas
Description:
Assessment of the geology, hydrogeology and hydrology of Medina and Diversion Lakes and seepage into the Edwards / Trinity aquifers
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Title: Additional Graphical Materials to the Edwards Aquifer (San Antonio Region) Groundwater Flow Model (Lindren et al., 2004)
Description:
Visual output for flowpath simulation, steady-state and transient water level residuals, and watr-level root mean square error distributions for target wells using MODFLOW/GWSIM models and data from Lindgren et al, 2004
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Title: Needs Assessment for Ground-Water Management Model for the Edwards Aquifer (San Antonio Section)
Description:
Discussion of needs and limitations in developing a model of the Edwards Aquifer, Balcones Fault Zone, San Antonio Segment Note: This report is included for its historical value but may have been replaced by more recent studies.
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Title: Summary Information Regarding Historical Edwards Aquifer Recharge, Aquifer Modeling and Recharge Enhancement Projects
Description:
Compilation of historical reports by HDR Engineering on recharge and modeling of the Edwards Aquifer Balcones Fault Zone San Antonio Segment
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Title: Assessment of Recharge Benefit from Enhanced Rainfall
Description:
Using the HSPF model to estimate recharge in the Blanco and Nueces River basins from the Edwards Aquifer Authority Precipitation Enhancement Program in 1999-2001
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Title: Evaluation of Alternative Instream and Bay and Estuary Flow Criteria for Run-of-the-River Diversions / Technical Memorandum
Description:
Discussion of various concepts for a second generation of environmental flow criteria for the Guadalupe - San Antonio River Basin to be used in the Trans-Texas Water Program
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Title: A Lumped Parameter Model for the Edwards Aquifer
Description:
Computer modeling of the San Antonio region of the Edwards Aquifer using a nonlinear optimization algorithm with a Kalman filter
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Title: Structural Controls on the Edwards Aquifer/Trinity Aquifer Interface in the Helotes Quadrangle, Texas
Description:
Structural analyses for geologic framework model of the Helotes Quadrangle around the intersection of the Edwards and Trinity Aquifers
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Title: HSPF Recharge Models for the San Antonio Segment of the Balcones Fault Zone of the Edwards Aquifer – Part 1
Description:
Development of complete contributing and recharge zones for the HSPF enhancement to MODFLOW from historical data on all nine drainage basins of the Edwards Aquifer Balcones Fault Zone San Antonio Segment
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Title: HSPF Recharge Models for the San Antonio Segment of the Balcones Fault Zone of the Edwards Aquifer – Part 2
Description:
Development of complete contributing and recharge zones for the HSPF enhancement to MODFLOW from historical data on all nine drainage basins of the Edwards Aquifer Balcones Fault Zone San Antonio Segment - Part 2
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Title: HSPF Recharge Models for the San Antonio Segment of the Balcones Fault Zone of the Edwards Aquifer – Part 3
Description:
Development of complete contributing and recharge zones for the HSPF enhancement to MODFLOW from historical data on all nine drainage basins of the Edwards Aquifer Balcones Fault Zone San Antonio Segment - Part 3
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Title: Regional Water Supply Planning Study - Phase I Nueces River Basin Volume I - Executive Summary
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies. Executive Summary of 1991 water supply plan for the Nueces River Basin emphasizing construction of recharge structures (dams and reservoirs)
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Title: Regional Water Supply Planning Study - Phase I Nueces River Basin Volume II - Technical Report
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies. Technical study for 1991 water supply plan for the Nueces River Basin emphasizing construction of recharge structures (dams and reservoirs)
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Title: Regional Water Supply Planning Study - Phase I Nueces River Basin Volume III - Appendices
Description:
Note: This report is included for its historical value and may have been replaced by more recent studies. Appendices for 1991 water supply plan for the Nueces River Basin emphasizing construction of recharge structures (dams and reservoirs)
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Title: Optimization Technical Studies in Support of the Edwards Aquifer Optimization Program
Description:
Summary of proposed optimization studies for the EAA. Note: Is outdated. Has been replaced by more recent modeling studies and water plans.
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Title: Trans-Texas Water Program West Central Study Area Phase 2 Edwards Aquifer Recharge Analyses
Description:
Part of Phase II of the West Central Study Area, Trans-Texas Water Program. Included for historical value; has been replaced by more recent plans.
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Title: Technical Assessments in Support of the Edwards Aquifer Science Committee "J Charge" Flow Regime Evaluation for the Comal and San Marcos River Systems
Description:
Modeling for critical flow requirements to protect endangered species in the Comal and San Marcos Rivers
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Title: DEVELOPMENT OF A FINITE-ELEMENT METHOD GROUNDWATER FLOW MODEL FOR THE EDWARDS AQUIFER
Description:
Attributes of the alternative model that set it conceptually independent from the 2004 MODFLOW model are:  Inclusion of the Contributing Zone  Recharge is calculated directly from precipitation and is not prescribed at the upgradient side of the Recharge Zone  Western boundary is refined to better define the Kinney Pool  The Contributing and Recharge Zones are characterized by three layers  Distinct conduits are included in the Confined Zone  The alternative model employs a finite-element formulation instead of the finite-difference formulation used in the 2004 MODFLOW model
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Title: Structural mapping of the Edwards Aquifer in eastern and central Uvalde County, Texas, using seismic, well and outcrop data
Description:
Structural mapping of the Edwards Aquifer in eastern and central Uvalde County, Texas, using seismic, well and outcrop data. Work performed under contract with the EAA by Thomas E. Ewing, Frontera Exploration Consultants; May 24, 2005
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Title: Updates to the MODFLOW Groundwater Model of the San Antonio Segment of the Edwards Aquifer
Description:
MODFLOW groundwater model springflow in the Edwards Aquifer Balcones Fault Zone San Antonio Segment and Barton Springs segment
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