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Track: Water Distribution, Wastewater, Sewer
Peter Pace
Oak Ridge National Laboratory
PO Box 2008
Oak Ridge, TN 37831-6274
Telephone: 423-241-5703
Fax: 423-574-4634
E-mail: p8v@ornl.gov or pacepj@ornl.gov
James Woods, Daniel Levine, Bill DePoto, LA County , Dept. of Public Works
Using GIS To Help Implement the National Pollutant Discharge Elimination System (NPDES) Permit for Los Angeles County
One of the many responsibilities of Los Angeles County Department of Public Works is to manage nonpoint pollution that enters the storm drain network within Los Angeles County. The management of this nonpoint source pollution is mandated by the NPDES guidelines under the Federal Clean Water Act. These guidelines require the County to monitor the drainage network and the storm water and urban runoff flowing through it. The County covers over 4,000 square miles, with the NPDES Permit covering over 3,100 square miles and over 1,000 miles of storm drains. A proposed solution to monitor and manage this vast geographic area is centered upon an ArcInfo GIS. Some of the many concerns that need to be addressed include the administration and evaluation of best management practices (BMPs), system maintenance, and pollutant load assessment and modeling. Coverages that will be used for this analysis will include the storm drain network, roads, catch basins, manholes, parcels, land use, drainage basins, and other
hydrological zones. These elements would be related to external databases currently used for facility management and planning. This system would be used for query purposes to perform spatial modeling and "what if" scenarios needed to create maps and reports that would be used to test and evaluate various implementation strategies.
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