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Freshwater Salinization Syndrome (FSS) refers to the suite of physical, biological, and chemical impacts of salt ions on the degradation of natural, engineered, and social systems. Impacts of FSS on mobilization of chemical cocktails has been documented in streams and groundwater...

Bioretention units were constructed at USEPA’s Edison Environmental Center to evaluate drainage to surface runoff ratio for sizing of bioretention stormwater controls. Three sizes of hydraulically isolated bioretention units were tested in duplicate with changes in aspect ratio o...

Harvesting precipitation from rooftops is part of many green infrastructure projects to manage storm water and supplement water supplies.&nbsp; One of the barriers for implementing rooftop rainwater harvesting in the U.S. is limited risk-based treatment guidance for the use of ro...

Stormwater management seeks to reduce runoff and improve water quality, and EPA's Stormwater Management Model (SWMM) has been used for decades to conduct hydrologic, hydraulic, and water quality simulations that aid in planning, analyzing, and designing stormwater drainage system...

Urban greenspace and green infrastructure are often cited for their many ecosystem services and benefits including stormwater management. However, the localized nature and limited range of effects of these benefits and the type of greenspace and green infrastructure, make the pla...

The Proctor Creek Watershed Story Map is an easy-to-use interactive online tool that combines maps with narrative text, images, and multimedia content to convey information as a story and inform and connect with viewers. The Story Map explores community-identified concerns, such ...

More than 80% of the United States population resides in communities with municipal stormwater systems.&nbsp; These systems are designed to collect, transport, and discharge stormwater from a defined catchment area into local surface waters.&nbsp; Discharges may contain unsafe le...

The EPA Storm Water Management Model (SWMM) is a dynamic rainfall-runoff simulation model used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas. The runoff component of SWMM operates on a collection of subcatchment ar...

EPA’s National Stormwater Calculator (SWC) is a software application tool that estimates the annual amount of rainwater and frequency of runoff from a specific site using green infrastructure as low impact development controls. The SWC is designed for use by anyone interested in ...

There are a number of macroinvertebrate sampling methods used to sample streams. Those most commonly used, such as nets, fixed-area grab samplers (Hess, Surber), and deployed samplers (Hester-Dendy, gravel tray), work well in perennial streams with a relatively constant flow. One...

The practice of collecting precipitation from rooftops (roof runoff) is an environmentally friendly way to supplement water supplies.&nbsp; One of the barriers to implementation of roof runoff in the US is limited risk-based treatment guidance for the use of roof runoff.&nbsp; Gu...

Billions of dollars are spent on attempts to improve urban water quality using stormwater best management practices (BMPs), stream restoration and other forms of green infrastructure (GI). While stream restoration and stormwater BMPs can retain contaminants, there is also potenti...

This presentation will introduce the Storm Water Management Model (SWMM). SWMM is used throughout the world for planning, analysis, and design related to stormwater runoff, combined and sanitary sewers, and other drainage systems in urban areas. There are many applications for dr...

The EPA's Watershed Management Optimization Support Tool (WMOST) is designed to facilitate integrated water management among communities, utilities, watershed organizations, consultants, and others. WMOST identifies the most cost-effective suite of management practices to meet us...

Update MOU partner on early results and envisioned pather forward

Somatic and F+ coliphages are promising alternative fecal indicators, but current detection methods are hindered by lower levels of coliphages in surface waters compared to traditional bacterial fecal indicators. We evaluated the ability of dead-end hollow fiber ultrafiltration (...

This is in response to NYC DEP requested an overview of ORD permeable pavement research and findings.

Land managers and stakeholders face many challenges as competing objectives and a rapidly changing climate affect watersheds and the ecosystem services they provide &ndash; clean drinking water, flood control, food and fiber, habitat for fish and wildlife, recreation, and others ...

Changes in population growth, urban development, and climate have increased the occurrence of stormwater related problems.  Green infrastructure often is proposed as a tool to help manage stormwater in urban areas.  Other types of greenspace can serve as green infrastructure and ...

Eutrophication&nbsp;and excessive algal growth pose a threat on aquatic organisms and the health of the public, environment, and the economy. Understanding what drives excessive algal growth can inform&nbsp;mitigation measures&nbsp;and aid in advance planning to minimize impacts....

THOMAS P. O'CONNOR, P.E., BCEE Thomas has been an environmental engineer with the U.S. Environmental Protection Agency (EPA), Office of Research and Development for more than 25 years. He currently works for the Center for Environmental Solutions and Emergency Response, Water Inf...

Green infrastructure is usually realized as contiguous, intentional green spaces that may also be actively managed landscapes recognized to produce ecosystem services. Urbanization modulates the structure of landscapes, and these novel, inadvertent and largely unmanaged landforms...

This document is a compendium of pictures and descriptive text of techniques used to stop the spread of contamination in stormwater and how it could be use to contain water for treatment. Technologies include adsorbent pads, dams, and other methods that would minimize waste and l...

<p>EPA announced the release of VELMA 2.1 Model and accompanying supplemental user's guide (Apr 2022) on the EPA website. EPA's VELMA tool helps assessor's model effective decisions for a wide array of environmental issues. It is a spatially explicit ecohydrological watershed mod...

Enhanced Aquifer Recovery (EAR) conveys stormwater runoff or treated wastewater into the subsurface for storage, potential reuse, and augment water supplies. In this research effort the infiltration of stormwater runoff will be examined. The potential impacts to groundwater quali...