Science Inventory

Storm Water Management Model Climate Adjustment Tool (SWMM-CAT)


Rossman, L. AND M. Tryby. Storm Water Management Model Climate Adjustment Tool (SWMM-CAT). Presented at International Water Association, Cincinnati, OH, April 20 - 24, 2015.


This presentation is an outreach activity for SWMM-CAT.


The US EPA’s newest tool, the Stormwater Management Model (SWMM) – Climate Adjustment Tool (CAT) is meant to help municipal stormwater utilities better address potential climate change impacts affecting their operations. SWMM, first released in 1971, models hydrology and hydraulics to simulate the movement of water through the landscape and into and through sewer systems. It has had numerous updates over the years, including the addition of a green infrastructure module in 2010 to simulate the integration of green infrastructure practices, ranging from green roofs to permeable parking lots, into a community’s stormwater management plan. SWMM is widely used throughout the world and considered the “gold standard” in the design of urban wet weather flow pollution abatement approaches, and allows users to include any combination of low impact development/green infrastructure controls to determine their effectiveness in managing stormwater and sewer overflows. The new CAT update for SWMM is a simple to use software utility that applies monthly climate adjustment factors to historical precipitation and temperature data to consider potential impacts of future climate on stormwater. The climate adjustment factors are derived from US EPA’s Climate Resilience Evaluation and Awareness Tool (CREAT 2.0) and utilize the best available climate science to facilitate water utility sector climate adaptation and resiliency analysis.

Record Details:

Product Published Date: 04/21/2015
Record Last Revised: 07/15/2015
OMB Category: Other
Record ID: 308378