New England Water Science Center

Integrated Modeling

Integrated assessments of hydrologic systems are essential for effective water management. The New England Water Science Center uses state-of-the-art modeling and statistical tools to conduct integrated assessments of groundwater and surface-water availability and quality at a range of spatial and temporal scales across New England. Studies are conducted to evaluate the effects of human interventions on the physical and geochemical characteristics of hydrologic systems and identify water availability for human needs while minimizing adverse effects on ecosystem function. A particular focus area for the section is transport and discharge of nitrogen in coastal regions of southern New England.

Filter Total Items: 12
Date published: March 31, 2021
Status: Active

Hydrologic Interpretive Program

The mission of the Hydrologic Interpretive Program is to work with stakeholders to design, carry out, and publish scientific studies addressing critical water-resources issues facing New England and the Nation.

Date published: March 8, 2021
Status: Active

Assessment of Nutrient Transport and Discharge to Coastal Embayments, Wickford, Rhode Island

In 2020 the USGS began a partnership with the U.S. Environmental Protection Agency (EPA) Region 1 Southeast New England Program for Coastal Watershed Restoration (SNEP) and EPA Office of Research and Development (ORD), Atlantic Coastal Sciences Division, Narragansett, RI in support of water-quality and ecological monitoring being conducted by ORD in the coastal waters around Wickford, RI. The...

Date published: March 9, 2020
Status: Active

Measurement and Modeling of Nitrogen Discharge to Cape Cod Rivers to Identify High-Priority Nitrogen Reduction Areas

     In 2019 USGS and the U.S. Environmental Protection Agency (EPA) Region 1 initiated a study to measure spatial and temporal patterns of nitrogen loading in selected rivers on Cape Cod and then determine whether the measured patterns can be related to nitrogen source areas in the surrounding watersheds to prioritize nitrogen reduction efforts. Study results will improve understanding of...

Date published: February 6, 2019
Status: Completed

Assessment of Potential Effects of Water-Supply Withdrawals on Groundwater Levels near the Hyannis Ponds Complex, Barnstable, Massachusetts

The USGS, in cooperation with the Town of Barnstable and MassWildlife, is assessing the potential effects of new water-supply withdrawals on groundwater levels in the Hyannis Ponds Wildlife Management Area on Cape Cod. A groundwater-flow model is being used to simulate the effects of several possible withdrawal and wastewater-return flow scenarios developed by the Town of Barnstable and...

Date published: February 6, 2019
Status: Active

Development of a Regional-Scale Model to Simulate Groundwater Flow and Nitrogen Loading in Watersheds Along the Connecticut Coast of Long Island Sound

In 2018 USGS began work on the development of regional-scale groundwater flow and nitrogen transport models of areas along the Connecticut coast. The model will be used as a quantitative tool to evaluate groundwater flow and nitrogen loading to Long Island Sound.

Date published: February 4, 2019
Status: Completed

Hydrologic Site Assessment for Passive Treatment of Groundwater Nitrogen with Permeable Reactive Barriers, Cape Cod, Massachusetts

In 2019 USGS completed a study designed to develop and evaluate a phased site-assessment approach for determining the hydrologic suitability of sites being considered for permeable reactive barrier installation on Cape Cod. The approach provides a template for town officials and other stakeholders to follow when considering PRBs for passive treatment of nitrogen in groundwater on Cape Cod and...

Date published: December 17, 2018
Status: Completed

The Connecticut Streamflow and Sustainable Water Use Estimator: A Decision-Support Tool to Estimate Streamflow and Water Availability at Ungaged, User-Defined Stream Locations in Connecticut

The Connecticut streamflow and sustainable water use estimator is a decision-support tool that provides estimates of daily unaltered streamflow, water-use adjusted streamflow (for the portions of the state where water-use data are available), and water availability for ungaged, user-defined sites in Connecticut. 

Date published: December 13, 2018
Status: Completed

Estimation of Daily Streamflow and Water Availability in the Massachusetts Sustainable-Yield Estimator, Version 2.0

The Massachusetts Sustainable-Yield Estimator is a decision-support tool that provides estimates of daily unaltered streamflow, water-use-adjusted streamflow, and water availability for ungaged, user-defined sites in Massachusetts. In this recently completed study, version 2.0 of the original Sustainable-Yield Estimator (Archfield and others, 2010) was developed with minor changes to the...

Date published: October 24, 2018
Status: Active

Assessment of Hydrologic and Water-Quality Changes in Shallow Groundwater Beneath a Coastal Neighborhood Being Converted from Septic Systems to Municipal Sewers

The U.S. Geological Survey and the U.S. Environmental Protection Agency are collaborating on a study to better understand changes to groundwater quality beneath a densely developed coastal neighborhood as it undergoes conversion from onsite wastewater disposal to municipal sewering.

Date published: September 26, 2018
Status: Completed

Characterization of Water Quality in the Sakonnet River, Rhode Island, 2018-19

Sections of Narragansett Bay and its eastern arm, the Sakonnet River, are considered impaired for shellfishing, aquatic habitat and recreational use by the State of Rhode Island. Aquatic habitat and water quality in the western portions of Narragansett Bay are relatively well understood, but there is comparably limited information available in the Sakonnet River. To address concerns about the...

Contacts: Jason Sorenson
Date published: April 9, 2018
Status: Active

SELDM: Stochastic Empirical Loading and Dilution Model - Project page

Note: SELDM is now on version 1.1.0. Please use the new version on the software support page here.

Contacts: Gregory Granato
Date published: May 11, 2015
Status: Completed

Stochastic Empirical Loading and Dilution Model (SELDM) Transportation Research Board Presentation

Note: SELDM is now on version 1.0.3 Please use the new version on the software support page here

Contacts: Gregory Granato