REV91908

• Permit No: C1981032
• IBM Index Class Name: Revision
• Doc Date: 12/6/1996
• Doc Name: EFFECTS OF PONDS ON FLOODS
• From: KENNETH L WAHL
• To: ERICA CROSBY
• Type & Sequence: TR12
• Media Type: D
• Archive: No

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To: <[e-mail]>
Cc: <[e-mail]>,<[e-mail]>,<[e-mail]>
<[e-mail]>
"Kenneth L Wahl, Hydrologist, Denver, CO" <[e-mail]>
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Dear Ms. Crosby:
"Kenneth L Wahl, Hydrologist, Denver, CO "<[e-mail]>
Effects of ponds on floods
Friday, December 6, 1996 11:29:18 MST
N
Bill Hotchkiss forwarded your request to me. There are several studies, in
addition to the Texas study, that may be relevant to your situation.
Livingston and Minges (1987) studied flood frequencies of small rural basins
in Eastern Colorado that included SCS (now NRCS) erosion-control and
flood-retarding structures. They used rainfall-runoff modeling and
regression procedures in their study and concluded that for estimating flood
frequency, effective drainage area (that area downstream from the structures)
should be used instead of total area. A similar study in Oklahoma
(Tortorelli and Bergman, 1984) routed water through flood-water retarding
stuctures on small basins and concluded that the small reservoirs, even
though designed for the 25-year flood, effectively delayed passage of flood
peaks from larger floods such that the controlled part of the basin added
little to the peak produced by the uncontrolled part of the basin.
The references for the above reports are:
Livingston, R.K., and Minges, D.R., 1987, Techniques of Estimating Regional
Flood Characteristics of Small Rural Watersheds in the Plains Region of
Eastern Colorado: U.S. Geological Survey Water-Resources Investigations
Report 87-4094, 72 p.
Tortorelli, R.L., and Bergman, D.L., 1984, Techiques for Estimating Flood
Peak Discharges for Unregulated Streams and Streams Regulated by Small
''Floodwater Retarding Structures in Oklahoma: U.S. Geological Survey
Water-Resources Investigations Report 84-4358, 92 p.
The Colorado report may be in Xour library. If not, a copy may be available
from our Colorado District Office in Lakewood (telephone [phone]). The
best bet for the Oklahoma report, should you want to get a copy, would be
from the Oklahoma District in Oklahoma City (telephone [phone]).
You may also wish to contact Paul Von Guerard,
Grand Junction (telephone [phone]). Paul
1980's on sediment yields in the Piceance basin
about the effectiveness of the sediment control
Ken Wahl,
USGS, Central Region Office
Forwarded Message
the chief of our office in
did some work in the early
and may have information
structures.
[e-mail] said:
> Dear Mr. Hotchkiss,
> I spoke with you briefly at the CMC meeting last night regarding possible
> research done on peak flow reduction due to detention basins. I work with
> the Department of Natural Resources; Division of Minerals and Geology. In my