Nonpoint Source Hydrologic Analysis
The Hydrologic Studies and Dam Safety Unit (HSDSU) supports the Nonpoint Source (NPS) Program by providing hydrologic analysis to help understand the impacts of stormwater runoff on stream dynamics. Hydrologic analyses that the HSDSU has provided to NPS projects include:
- Watershed delineation, soil, and land cover information: Obtaining watershed and subbasin boundaries, soil, and land cover information is essential early in a watershed planning project. HSDSU determines boundaries by reviewing USGS quadrangle maps. Watershed boundaries and land cover information for Geographic Information Systems (GIS) are available from Michigan's Geographic Data Library.
- Watershed Studies: Hydrologic modeling can be used to determine the impact of land uses changes and BMPs on storm flows. This information may be useful for long-range planning efforts, community storm water ordinances, and BMP selection, design, and evaluation.
Reports and Fact Sheets
- Small Storm Hydrology
- Application of the Richards-Baker Flashiness Index to Gaged Michigan Rivers and Streams, revised 2012 (5 MB)
- Quality Assurance Project Plan Guidance for Hydrologic Monitoring Studies
- Stream Stability and Channel Forming Flows
Hydrology and Stream Stability (2 MB), presented October 24, 2000: an overview of hydrology and stream stability, with some examples from specific projects
Hydrologic Analysis for Nonpoint Source Grants (4 MB), presented June 12, 2001 at the Nonpoint Source Program Grantee Workshop: an overview of the hydrologic analysis requirements for 319 or Clean Michigan Initiative (CMI) Nonpoint Source grants
Examples of Hydrologic Analysis for Nonpoint Source Grants (4 MB), presented December 14, 2001 at the Michigan Association of Conservation District conference
Macatawa Hydrology (3 MB), presented April 2, 2002 to the Macatawa Watershed committee: an overview of general hydrology as it relates to nonpoint source projects
Hydrologic Cues (5 MB), presented June 23, 2002 at MDEQ's Nonpoint Source Program Grantee Workshop: a presentation on the significance of stream and watershed observations
Hydrologic Analysis for NPS 319 and CMI Grants (6 MB), presented September 9, 2004 at MDEQ's Nonpoint Source Program Grantee Workshop