FLOOD01090

• County: Statewide
• Title: Spillway Rating and Flood Routing - Users Manual
• Date: 10/1/1966
• Prepared For: US
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Educational/Technical/Reference Information

SPILLWAY RATING AJlD FLOOD ROUTING

HYDROLOGIC ENGIliEERING l:l!a'l'J:)!;H
COMPll'l'ER PROORAM 22-J2-I210

1. ORIGIN OF PROORAM

1

a. This program is a modification and translation of Tulsa
District program 22-Gl-G512. It was translated in the Hydrologic
Engineering Center Corps of Engineers, 650 Capitol Mall, Sacramento,
California, by Bill S. Eichert, original author of the program, fram
Fortran II for the General Electric 225 computer to a Fortran II
caumon to IBM, RCA and GE. The major' changes made in the Center were
the addition of a routine to make an induced surcharge operation of
the flood control conduit for a project with an uncontrolled spillway,
and the substitution of the faster Modified Pul8 routine instead of
the trial and errOr routine of assuming and computing the water sur-
face elevation (so called arithmetic method). A source deck for a
two-part program for the 4OK, IBM 1620 is available for computers
with limited memory. The version for the larger computers, GE 225-8K,
is shown as Exhibit 6.

b. Up-to-date information and copies of source statement cards
for various types of camputers can be obtained from the Center upon
request by Government and cooperating organizations.

2. PURPOSE OF PROORAM

The main purpose of this program is to compute a spillway rating
curve for a concrete ogee spillway with vertical walls for an assumed
design head, then make a flood routing of the spillway design flood
to determine the maximum water surface. The spillway rating computa-
tion is performed according to the Hydrologic Design Charts of the
Waterways Experiment Station. The rating can also be for a broad-crested
weir and can also include the discharge from a conduit or sluice.
The routing can be for a gated or uncontrolled spillway. The gated
routing uses the emergency release diagram discussed in EM 1110-2-3600.

3. DESCRIPl'ION OF PROGRAM

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a. This general description is for the one-part program. The two-
part program is for computers with memory equivalent to the IBM 1620
with 40,000 digits of storage. Computers equivalent to the GE 225,8K
can take the whole program in one part and can make a trial and error
solution to get the proper design head "DESHD" in the spillway rating.
Separate runs must be made on the 2 Part program for different design
heads.

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