FLOOD01169

• County: Statewide
• Community: State of Colorado
• Stream Name: All
• Title: Design Guidelines and Criteria Channels and Hydraulic Structures on Sandy Soil
• Date: 6/1/1981
• Prepared For: UDFCD
• Prepared By: Simons Li & Associates Inc.
• Floodplain - Doc Type: Educational/Technical/Reference Information

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I. INTRODUCTION
1.1 General
A sand-bed channel generally is continually changing its position and

shape as a consequence of hydraulic forces acting on its bed and banks.

Natural and man-induced changes in rivers frequently set in motion responses

that can be propagated for long distances. The response of a river to natural

and man-induced changes often occurs in spite of attempts to control the

river environment. Unfortunately, the best methods to quantitatively predict

the river response are difficult, time consuming, and require specialized

knowledge of the subject for proper application. This makes them impractical
for use by the design engineer and thus, river response due to man-induced

changes is either ingnored or determined hy inappropriate methods. This

points to the need for a method of analysis that is better suited to the
design engineer's needs.

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1.2 Authorization
This report was authorized by the Urban Drainage and Flood Control District
(DISTRICT) in joint sponsorship with the City of Aurora, Colorado, through an
agreement dated September 2, 1980, with Simons, Li & Associates, Inc. The

Board of Directors of the DISTRICT adopted a Policy Resolution, Number 41,

Series of 1978, which set forth a DISTRICT policy of allocating funds to

help local public bodies maintain facilitjes owned by DISTRICT or cooper-

atively financed by DISTRICT and the local public body, but owned by the

local public body.

Monies were budgeted by the DISTRICT in the 1980 adopted Special Revenue
Fund Budget, Resolution Number 55, Series of 1979, for maintenance in 1980 of

facilitjes which were cooperatively financed by DISTRICT and local public

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