FLOOD05059

• County: Statewide
• Community: Nationwide
• Basin: Statewide
• Title: WSP2 Computer Program
• Date: 5/1/1976
• Prepared By: USDA Soil Conservation Service - Engineering Division
• Floodplain - Doc Type: Educational/Technical/Reference Information

the LINK card must be identified on a TRIB
card.
9. An END card must follow the cards
associated with a CHANGE card.

Updating
When updates are made the old data are
not saved. For example, update section
main 5 replaces data for old main 5. The
old data points are lost. Any piece of input
data can be updated. Most common is
updating of cross section coordinates to
reflect channel improvement. This usually
requires updating the corresponding seg-
ment data and, if channel iengths were
shortened, the reach file. Updating is done
as follows: .
1. CHANGE BRIDGE.-This is used to up-
date BPR, CULVERT, CONTR, or PIER data.
2. Any third, fourth, etc., TITLE card up-
dates the second TITLE card. A CHANGE
card is not needed.
3. CHANGE DISCHARGE.-AII the dis-
charge file is lost, so a:i new discharge
values must be entered.
4. STARTE or STARTS.-This information
can be updated without using a CHANGE
card if a new cross section name is used.
If the same section name is used, a
CHANGE STARTE or CHANGE STARTS
card must be used.
5. CHANGE SEGMENT.-N-values must be
re-entered. Segments within the same cross
section can be updated independently of
each other.
6. CHANGE REACH From (XSEC) To
(XSEC).-If From (XSEC) and To (XSEC)
are both filled in, then all cross sections
between (including the From (XSEC) and
To (XSEC) sections are replaced with the
new reach cards that follow. If' only the
From (XSEC) is filled in, any reach cards
that follow are inserted immediately after
the reach listed.
7. CHANGE SECTION.-If the section
name(s) that follows this card is in the file,
the data are replaced. If the section name
is not in the file, these cross section data
are added to the file.
8. CHANGE TRIB.-AII the TRIB file is
replaced by new names entered.
9. An END control card must follow the
last data for all updates.

Editing

All input data are edited for detectable
errors when they are read. The two types
of detectable errors are:
1. Warning errors that may not result in
erroneous answers, so computations con-
tinue.
2. Fatal errors in data that must be cor-
rected. When this type of error is detected,
computations will not proceed. The pro-
gram continues to edit ,the data as much
as possible in order to detect additional
errors.
Other errors can be detected only when
computations are being performed. All
error messages are made to stand out by
asterisks. For example,
.......BLANK IS NOT ALLOWED IN
FIELD NO. 5*************************

Careful study of the section on output error
messages will provide rnany ideas as to
data requirements.

Input for Given cfs Values

Two methods can be used to determine
flow rates at each cross section. One
method uses csm (cubic feet per second
per square mile) values as input which are
then converted to cfs (cubic feet per sec-
ond) values by the computer program.
The other method, based on direct input
of cfs values by the user, is explained in
the following example, which shows the
discharge and reach cards for a job using
given cfs values.

Discharge -2
Reach 1
Reach 2
Reach 3

0.7 0.9 1.0
1,375 0.0 0.0
1,345 450 450
1,290 700 700

1.2 1.5

Five profiles are calculated. At valley sec-
tion 1 the discharges are:
Profile 1 0.7 x 1,375 = 962 cfs
Profile 2 0.9 x 1,375 = 1,238 cfs
Profile 3 1.0 x 1,375 = 1,375 cfs
Profile 4 1.2 x 1,375 = 1,650 cfs
Profile 5 1.5 x 1,375 = 2,062 cfs
At valley section 2 the discharges are
0.7,0.9,1.0,1.2, and 1.5 times 1,345.

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