Abstract

GIS Tool for Stormwater Data Management
Track: Water, Wastewater, and Stormwater
Authors: Edwin Chiang

The Navy as a whole has increasingly stringent stormwater discharge limits, especially for pollutants such as copper and zinc. Before any BMPs may be implemented, the sources must be determined. The more difficult sources to find are non-point sources because data is scarce and no non-point sources stand out as being significant contributors.

As a response to a need submitted by Naval Base San Diego that had trouble meeting its copper and zinc stormwater runoff limits, the Naval Facilities Engineering Service Center partnered with Houston Engineering Inc. to tackle this problem. NAVFAC EXWC and HEI developed a GIS-based tool to find significant non-point sources of copper and zinc. A site characterization was conducted at NBSD with a Trimble device to capture all possible sources. Using a multi-linear regression model, the significant sources and concentrations are predicted. The deliverable is a GIS extension that finds the sources and manages data.