Advisory Committee on Water Information
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spatial--Minutes
October2001
SUBCOMMITTEE ON SPATIAL WATER DATA Minutes - October 18, 2001 |
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Thursday, October 18, 2001, at 10:00 a.m.-12:00 Noon
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10:00 |
Introductions |
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| Status of
Watershed Boundaries Datasets (WBD) Power Point Presentation - (1,392KB) |
Bob Pierce | |
| Affect of
Karst Terrain on Water Delineation (summary below) (Power Point Presentation) - (8,392KB) |
James Currens Kentucky Geological Survey & Joseph Ray Kentucky Division of Water |
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12:00 |
Adjourn | Bob Pierce |
| Summary of Currens & Ray
Presentation: The focus of Mr. Curren's and Mr. Ray's was although water in the Karst basins is considered groundwater, the flow behavior of the systems is in fact more like surfacewater. Conduit flow in these systems is typically convergent, fast, and turbulent. The stated purposes of the HUC delineation is to provide standardized data sets for "watershed management, water quality initiatives, watershed modeling, resource inventory and assessment and establishing total maximum daily loads" (Federal Standard for Delineation of Hydrologic Unit Boundaries, draft of June 4, 2001). We argue that all of these uses are dependent on accurate watershed delineation which the HUC boundaries do not provide in many Karst areas. This was recently demonstrated by a fuel spill in the Turnhole Spring basin, a tributary of the Green River, which discharges within Mammoth Cave National Park. The HUC map erroneously attributed the drainage from the spill site to the Barren River. Thus, either the recommended use for the HuC boundaries must be revised and limited or the boundaries must be revised when data or karst basins becomes available. |
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