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Last modified
11/23/2009 10:39:26 AM
Creation date
10/4/2006 9:46:58 PM
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Floodplain Documents
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
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<br />(4) Tailwater rating not high enough. When the spillway dis- <br />charge freeflow for an ogee spillway exceeds "QMAX" the canputer will <br />stop the rating (with last "Q(N)" less than "QMAX") and start the <br />flood routing. If variable "INDCON" = 10, and the conduit discharp;e <br />exceeds "QMAX" the tailwater needs to be extended. <br /> <br />(5) Inflows are erroneously in l,ooo's c.f.s. instead of in <br />c.f.s. as they must be. <br /> <br />(6) <br />(7) <br />9-16, 17-24, <br /> <br />EIMAX or QMAX on Card "A" is not in table. <br />') <br /> <br />Numbers on input cards are not proper fields, CoL 2-8, <br />etc. <br /> <br />(8) Too IIIII.DY points in elev-cap table (max of 30 points on <br />6 cards), tailwater table (max of 30 points on 6 cards), or too IIIII.DY <br />inflows (maximum of 80 inflows). If variable "ITYSP" = 0 (storage <br />indication routing), inflows less than conduit and spillway discharge <br />at starting elevation are not needed. Likewise too IIIII.DY inflows past <br />the peak elevation of the routing are unnecessary (regardless of <br />variable "ITYSP") for all but the final routing (to draw hydrographs) <br />and just take more computer time. <br /> <br />(9) Design head assumption carmot be "0". <br /> <br />(10) Reversing value at side slope. Inserting.5 instead of <br />2 for side slope of two horizontal to one vertical. <br /> <br />(11) Omission of five heading cards (i1lllllediately in front of <br />the data for a new run). <br /> <br />8. DEFINITION OF TERMS - See Exhibits 6 and 8 <br /> <br />9. EXAMPlES <br /> <br />a. Several test runs are inclosed in order to better show the <br />performance of the computer program. In addition to the computer print- <br />outs, shO'lm as Exhibit 5, a print-out of the data cards is also shO'lm <br />as Exhibit 4. The print-out of the data cards show the order the cards <br />must be read into the computer. <br /> <br />, <br /> <br />b. Test 1. - The first of this test shows a description of the <br />project (acccmp1ished by the heading cards), the variables used by the <br />canputer to make the run, and the abutment contraction coefficients <br />used in the spillway rating. For the run the tailwater table did not <br />affect the rating since the spillway tailwater was computed by the <br />specific energy equation, and the spillway discharge did not cause <br /> <br />15 <br />
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