Stormwater Symposium

Oral

394197 - A Simple Methodology to Incorporate Vadose Zone Mechanism into EPA SWMM (Storm Water Managament Model) Model Building

Monday, June 4
10:30 AM - 12:00 PM
Location: Mirage Room
Co-Authors: Robert Traver, Villanova, PA – Villanova University

EPA’s Storm Water Management Model (SWMM) is a versatile tool in urban water resources management. It provides not only simulation of runoff, water conveyance, and infiltration, but also control logics to simulate complicated active control of storm water management. However, one of the main drawbacks of SWMM is the lack of capability to simulate water movement in unsaturated soil. This presentation will provide a simple methodology to incorporate vadose zone water movement mechanisms into SWMM using the available SWMM engine (no re-coding). Movement of water in multiple types of soils is simulated by both the present methodology and Hydrus (a vadose zone model solving the complete Richards equation) as a comparison. The initial result shows that the new methodology can provide prediction of water movement in unsaturated soil very close to that provided by Hydrus with high accuracy. Practitioners and researchers will be able to adopt the new methodology easily to any SWMM model that needs to consider unsaturated water movement, both horizontal and vertical.

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394197 - A Simple Methodology to Incorporate Vadose Zone Mechanism into EPA SWMM (Storm Water Managament Model) Model Building



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