HEC-1 in semi-arid regions
HEC-1 in semi-arid regions
(OP)
Any suggestions regarding watershed models that include SINKS, typical of Nevada Basin and Range hydrologic area? I'm trying to determine the best parameters to use in HEC-1/HEC-HMS.





RE: HEC-1 in semi-arid regions
RE: HEC-1 in semi-arid regions
RE: HEC-1 in semi-arid regions
I have found the Maricopa Flood Control District documentation on Hydrology the best yet (10 years) for arid zone application of HEC 1 methodology.
The publication is available for around $40. and includes the most sophisticated software for generatiing the HEC 1 input files.
They can be reached at 602-506-1501.
RE: HEC-1 in semi-arid regions
We have created storm water injection wells in sinkholes by excavating to the open throat and grouting in a vertical perforated large diameter HDPE pipe and backfilling with 1 foot layers of graded stone separated by a geosynthetic material. In the end the volume of the sinkhole had to be large enough to accomodate the 100-yr, 24-hr storm event runoff amount without overtopping while still assuming no outflow for the same reasons listed above.
An exception we have ran across is when the sinkhole was located close enough to a federally governed body of water such as a lake or river and this governing agency (TVA) had posted flood elevations around the sinkhole on FEMA maps. They had in the past performed dye tests to show that the sink was directly connected to the lake. This superceded the local governments authority and regulations on land improvements involving a sinkhole's watershed.
RE: HEC-1 in semi-arid regions
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RE: HEC-1 in semi-arid regions