Science & Technology

RSEI Queries

RSEI Queries online help page - tips and instructions

NHDPlus Versioning

NHDPlus has a dual versioning system and the most recent version for each component is always available.

Working Paper: Modeling the Property Price Impact of Water Quality in 14 Chesapeake Bay Counties

This is a working paper titled "Modeling the Property Price Impact of Water Quality in 14 Chesapeake Bay Counties"

Working Paper: The Energy Efficiency Paradox: A Case Study of Supermarket Refrigeration System Investment Decisions

This is a working paper titled "The Energy Efficiency Paradox: A Case Study of Supermarket Refrigeration System Investment Decisions"

EPA white papers and memos for 2015 SAB Economy-Wide Modeling panel

These papers were developed to inform the deliberations of the SAB Panel on the technical merits and
challenges of economy-wide modeling for an air regulation. They are not official U.S. Environmental
Protection Agency (EPA) reports

Working Paper: Explaining Variation in the Value of Chesapeake Bay Water Quality Using Internal Meta-analysis

This is a working paper titled "Explaining Variation in the Value of Chesapeake Bay Water Quality Using Internal Meta-analysis"

Working Paper: The Property Value Impacts of Groundwater Contamination: Agricultural Runoff and Private Wells

This is a working paper titled "The Property Value Impacts of Groundwater Contamination: Agricultural Runoff and Private Wells"

User’s Manual for the CO - Benefits Risk Assessment (COBRA) Screening Model

Use COBRA to estimate the impact of air pollution emission changes on ambient particulate matter (PM) air pollution concentrations.

Estimating the Potential Toxicity of Chemicals Associated with Hydraulic Fracturing Operations Using Quantitative Structure-Activity Relationship Modeling

Researchers facilitated evaluation of chemicals that lack chronic oral toxicity values using a QSAR model to develop estimates of potential toxicity for chemicals used in HF fluids or found in flowback or produced water

Case Studies for EPA’s Hydraulic Fracturing Study

Modeling of fault reactivation and induced seismicity during hydraulic fracturing of shale-gas reservoirs

Written by Rutqvist et al. Published in Journal of Petroleum Science and Engineering. July 2013.

Gas Flow Tightly Coupled to Elastoplastic Geomechanics for Tight- and Shale-Gas Reservoirs: Material Failure and Enhanced Permeability

Jihoon Kim and George Moridis, Gas Flow Tightly Coupled to Elastoplastic Geomechanics for Tight and Shale Gas Reservoirs: Material Failure and Enhanced Permeability

Development of the T+M coupled flow-geomechanical simulator to describe fracture propagation and coupled flow-thermal-geomechanical processes in tight/shale gas systems

Written by Jihoon Kim; George J. Moridis. Published in Computers and Geosciences,Accepted manuscript,doi:10.1016/j.cageo.2013.04.023

Numerical analysis of fracture propagation during hydraulic fracturing operations in shale gas systems

Researchers used the TOUGH+ geomechanics computational software and simulation system to examine the likelihood of hydraulic fracture propagation (the spread of fractures) traveling long distances to connect with drinking water aquifers.

Overview of Chronic Oral Toxicity Values for Chemicals Present in Hydraulic Fracturing Fluids, Flowback and Produced Waters

as part of EPA's Hydraulic Fracturing Drinking Water Assessment, EPA is summarizing existing toxicity data for chemicals reported to be used in hydraulic fracturing fluids and/or found in flowback or produced waters from hydraulically fractured wells