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

SCS-ENG-17
REV.MAR.1976

ROAD

ROAD NAME
WEIR COEF
REACH LENGTHS

11-20
21-30
31-50

BPR

ROAD NAME
SKEW TYPE
BASE CURVE

11-20
21-30
31-40

PIER CURVE

41-50

PIER

ENTERS THE ELm-lENTS FOR A ROAD SECTION.
THE NAME OF THE ROAD, EACH MUST BE UNIQUE.
THE COEFFICIENT TO BE USED FOR FLOW OVER THE
SEE CHANNEL AND FLOOD LENGTH DESCRIPTIONS ON

(SEE NOTE 1, SCS-ENG-19).
ROADWAY (USUALLY 2.7).
THE REACH CARD. (SCS-ENG-lS)

ENTERS DATA TO BE USED FOR COMPUTING BPR BRIDGES

THE NAME OF THE ROAD THAT THIS BRIDGE IS IN. (SEE NOTE 1, SCS-ENG-19)

A OR B ACCORDING TO FIGURE 10 IN "BPR HYDRAULICS OF BRIDGE WATERWAYS, 1970".

REFERENCE FIGURE 6 "BPR HYDRAULICS OF BRIDGE WATERWAYS, 1970", CURVES ARE
NUMBERED 1-3 FROM BOTTOM TO TOP ON FIGURE 6.

REFERENCE ABOVE BPR MANUAL FIGURE 7. CUll.VES ARE NUMBERED 1-8 FROM LEFT TO RIGHT.

BOTTOM ELEV.
AVG WIDTH

DEFINES THE PI!':R SIZES IF PRESENT. (THIS CARD MUST FOLLOW THE BPR CARD IF USED).
MAX OF 3 PIERS (1 CARD) MAY BE ENTERED. (IF MORE ARE PRESENT COMBINE DIMENSIONS).

11-20,31-40,51-60 THE ELEVATIONS WHERE THE PIERS INTERSECT THE CHANNEL BOTTOM.

21-30,41-50,61-70 THE AVERAGE WIDTHS OF THE PIERS (SEE FIGURE 7 BPR MANUAL).

GIRDER

ELEV FULL 11-20

ELEV GRDR BOT 21-30
SKEW ANGLE 31-40

DRIF COEF 41-50
WEIR COEF 51-60

DATA CARDS 11-70
1-5 BY 10
COL.
FIELDS

ENDTABLE

CULV1

ROAD NAME
NO OF PIPES

11-20
21-30

CULV CODE

31-40

CULV2

DIA OR HEIGHT 11-20

WIDTH 21-30
LENGTH 31-40
ELEV US INVERT 41-50
ELEV DS INVERT 51-60
CULV 'n' 61-70

DESCRIBES THE INDIVIDUAL ITEMS PERTAINING TO AN OPENING (MUST FOLLOW CONTR OR
PIER, IF PIER IS NOT USED IT MUST FOLLOW BPR.

ELEVATION WHERE ORIFICE FLOW BEGINS. BASED ON THE INDIVIDUALS BEST JUDGEMENT
IT IS USUALLY SLIGHTLY ABOVE THE POINT WHERE THE GIRDERS ARE ALL SUBMERED.

THE ELEVATION WHERE THE GIRDERS FIRST BEGIN TO REDUCE FLOW AREA FROM THE CHANNEL.

THE ANGLE OF THE FLOW IN DEGREES WITH THE PERPENDICULAR TO THE CENTER LINE OF
THE ROADWAY.

THE COEFFICIENT TO BE USED IN THE ORIFICE FLOW FORMULA WHEN ORIFICE FLOW CONTROLS.

THE WEIR COEFFICIENT FOR FLOW OVER THE BRIDGE DECK. THIS IS COMPUTED SEPARATE
FROM THE FLOW OVER THE ROADWAY PROPER.

THE X AND Y COORDINATES ARE NEEDED TO DESCRIBE THE SHAPE OF THE BRIDGE GRIDER
THESE POINT ARE USED TO DEDUCT NET FLOW AREA FROM THE SECTION WHEN FLOW
ENCOUNTERS THE GIRDER. THE FIRST AND LAST GIRDER POINTS DEFINE THE WEIR WHEN
FLOW OVERTOPS THE GIRDER. THESE ARE ENTERED Xl, Yl, X2, Y2, ETC. THE FIRST
AND LAST POINTS MUST COINCIDE WITH POINTS ON THE CROSS SECTION (ROAD). USE ONLY
THE NUMBER OF CARDS ACTUALLY NEEDED.

INDICATES THE END OF A GIRDER TABLE.

ENTERS DATA TO BE USED IN COMPUTING LOSSES THROUGH CULVERTS.
THE NAME OF THE ROAD THAT THIS CULVERT IS IN. (SEE NOTE 1, SCS-ENG-19).
THE NUMBER OF IDENTICAL OPENINGS - NO LIMIT ON THIS NUMBER.

SELECT THE APPROPRIATE CODE FROM TABLE 1.

THIS IS A CONTINUATION OF CULV1 AND 'MUST' FOLLOW IT.

THE DIAMETER OF A CIRCULAR CULVERT IN FEET OR THE HEIGHT IN FEET OF A BOX
CULVERT OR PIPE ARCH.
THE WIDTH IN FEET OF A BOX CULVERT OR PIPE ARCH.
THE TOTAL LENGTH IN FEET OF THE CULVERT.
THE ELEVATION OF THE UPSTREAM INVERT OF THE CULVERT.
THE ELEVATION OF THE DOWNSTREAM INVERT OF THE CULVERT.
THE CULVERT 'n' VALUE, IF A VALUE OTHER THAN THAT ASSIGNED BY TABLE 1 IS DESIRED.

TABLE 1 CULVERT CODE TABLE

CORRUGATED METAL PIPE CONCRETE PIPE OR BOX
----~-,-,. SOUARE
CIRCULAR PIP.E ARCH CIRCULAR EDGE R.C. BOX
STRUC.
RIVETED STRUC. PLATE PAVED
INLET TYPE RIVETED 25% PAVED PLATE 25% PAVED 25% UNPAVED INLET TYPE CODE INLET TYPE CODE
'n'-.021 'n' .021 'n' .032 'n'=.026 '0''''.026 'n''''.032 '0''''.012 'n'=.012
PROJECTION 12311 12411 12111 12211 32211 32111 SOCKET-END 30 TO 75 DEGREE
MITERED 13322 13422 13122 13222 33222 33122 PROJECTION 22551 WINGWALL FLAIR 41111
HEADWALL 12333 12433 12133 12233 32233 32133 HEADWALL 22552 90 TO 15 DEGREE
END SECTION 12335 12435 SQUARE EDGE WINGWALL FLAIR 41122
BEVEL (A) 12346 12446 12146 12246 PROJECTION 22533 PARALLEL WINGWALLS 41133
BEVEL (B) 12347 12447 12147 12247 HEADWALL 22534
TAPERED 11348 11448 END SECTION 22535
BEVEL (A) 22546
BEVEL (B) 22547
TAPERED 21548
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