The Product: Watershed Plan Components Barry Tonning Tetra Tech
Contents of a Watershed Plan
Introduction
Water quality info & analysis
Types of Data for Watershed Characterization
Who has assessment data?
Flow data is available from the US Geological Survey web site at http: //waterdata. usgs. gov /nwis/rt
T. C. Stiles, 2001; B. Cleland, 2002
Source Water Protection Map for Slate Creek (Montgomery County)
Waterbodies Requiring TMDLs Within the. Lower Grand River Watershed
Sample Data Sources
Other Data Sources
http: //www. nrcs. usda. gov/technical/ECS/aquatic/svapfnl. pdf
Unified Subwatershed and Site Reconnaissance Survey Neighborhood Source Assessment Hot Spot Investigation Pervious Area Assessment Streets and Storm Drain Assessment
Identifying stressors and sources
Stressors
Sources
How can we estimate loads?
Existing loads come from lots of places. . .
Existing loads come from:
Steady-load: sewage treatment plant discharge via infrared photography
Nonpoint source: precip-driven (this may be a point source in some cases!)
What is a “load? ”
Identification of causes & sources
Reducing loads: the basics
To model, or not to model. . .
http: //it. tetratech-ffx. com/stepl
http: //www. predict. psu. edu/
Watershed analysis is on ongoing learning process – iterative & creative!
Proposed management measures
Examples of Different Scenarios to Meet the Same Load Target
Identify candidate practices
Select the most appropriate BMPs
Prioritizing/targeting BMPs
References for determining BMP effectiveness
www. epa. gov/owow/nps/agmm/index. html
http: //www. epa. gov/agriculture/anafobmp. html
www. epa. gov/owow/nps/agmm/ index. html
http: //www. epa. gov/owow/nps/forestrymgmt/
www. bmpdatabase. org/docs. htm
Sample BMP effectiveness table
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