ML19329D792

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Comments on Cerc Technical Memo 35;Storm Surge on Open Coast:Fundamentals & Simplified Prediction
ML19329D792
Person / Time
Site: Crystal River Duke Energy icon.png
Issue date: 05/31/1971
From: Bodine B
US ATOMIC ENERGY COMMISSION (AEC)
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ML19329D785 List:
References
NUDOCS 8003170735
Download: ML19329D792 (6)


Text

_

V COMMENTS ON CERC TECllNICAL MEMO NO. 35; STORM SURGE ON THE OPEN COAST:

FUNDAMENTALS AND SIMPLIFIED PREDICTION; by B. R. Bodine; May 1971 h.

PAGE REMARK 1.

11.

The list of variables should contain a definition of S, as per page vi.

2.

14.

Equation 11 should read:

-f = -h { fV + kW 'cos0]

3.

16.

Equations labeled 15 should have limits on i for X to i =,1M, and on t to i = NM.

In addition, the lower limit on i for t is i = 1.

~ 4.

16.

Seventh line from bottom of 'he page, change x t

tox;.

5.

17.

In the denominator of equation 18, the last subscripts (i) and superscript should be inside the parenthesis.for variable D, and a closing bracket supplied after the term in the denominator.

6.

19.

The right side of the inequality for variable V c

should be to the power, and the multiplier 2 in the denominator should be removed.

7.

19.,

The right side of the inequality in equation 24 should be to the power, and the subscript for the second B in the numerator should be i + 1.

8.

21.

The subscript for the second A term in equation 25 should be i + 1.

9.

22.

Add the following sentence after the last line of the first paragraph of section 2:

"Because other parameters have also been selected from historical maximum values, the probability of a SPH occurrence would be less than the CPI probability."

ATTACllMENT

1 l

i NO.

PAGE REMARK 10.

23.

The third and fourth sentences of the first paragraph of section 3 should be changed to the following:

' ~ ~ ~

"To ensure that there is minimum likelihood that the safety aspects of these power plants would be compromised during severe hurricanes (surge and wind. generated wave effects) the AEC.

AEC concluded that adequate safety would be provided if the safety-related facilities of such plants were not adversely affected by the surge.

11.

25.

The subscript for the second p term on the left side of equation 32 should be deleted.

12, 26.

The first paragraph of section 2 should be modified to reficct the use of initial rise values based upon Jachowski's analysis of the 10 percent historical tidal frequency.

12.

41.-43.

Literature cited should be updated to reflect present research in calibration coefficients.

13.

45.-

The appendix should be updated to reflect the program changes made for verification studies and for PMH estimates.

It is strongly suggested that the program be modified further to include printed output of all input variables in the same format as read by the program.

(Further-more, the program changes for readily making PMH estimates, to incorporate'a peripheral PMH wind field program, have been made by the AEC staff.)

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SUMMARY

OF HURRICANE VERIFICATIONS i

AEC WIND OBSERVED RUN MODEL D&M STRESS COMPUTED MAXIMUM AND TIME

. INITIAL BOTTOM VIND STRESS COEFS. CORR.

FEAK RECORDED DATA INCREMENT

RISE, FRICTON x 10-6 FACTOR ELEV.,

ELEV.,

llRRICANE LOCATION MODEL SOURCE

-HOURS FEET COEP.

CSK1 CSK2 x 10-6 MLW Mt.W FI:tARKS 1(49 Freeport AEC AEC 1

3.4

.007 1.3 9.65 9.6 Corputed peck it 7 hrs. late; fit is poor "inside" ggc.

8.98 9.5 Observed hydro;reph used in todci Freeport D&M D&M 1

2.63

.0001 1.0 1.4 does not includc tide which would shift peak backuard I hour.

Without tide cc:cputed pcsk value of 7.58 compares to observed value of 7.9.

Calveston AEC AEC 1

3.2

.02

.5 6.64 6.66 Corputed peak is 5 hrs. late; fit is goed; basic data very poor.

tr.r l a Calveston AEC AEC 1

3.1

.02 1.1 10.67 10.48 Computed peak is 3.5 hrs. late; fit is good.

Calveston D&M AEC 1

1.9 02 1.25 1.0 7.77 10.48 Calveston D&M D&M 6&3 1.87 0011 0.8 1.0 22.65 22.18 Tide gage dattm. cas 12.19 f t. below MLW. Errors noted in wind speed and angle data. (Sec Surc.Tary for discussia.

Freeport AEC AEC 1

3.9

.007 1.2 12.73 12.35 of run.)

is Computed peak is 3 hrs. carly; fit Sabine Pass D&M D&M 6&3 1.11

.0019 0.8 1.0 8.25 7.96 Observed hydro!caph on computer printout is not the rer.c as that listed in Blue Book *(Appendix D).

Water level dat ua r,ct spccificd.

Hydrograph recorded in a channel -

not on open cot st.

Computed pcak

  • 1:nclosure 2 to FP6L letter of July 13, 1973, value comparcs to 7.36, the obscrvcd Dames 6 Moore Ibrricane Verification Study.

maximum on printout. Errors noted in wind' speed and angle data.

e i

l l

0 e

4

t

SUMMARY

OF flURRICANE VERTFICATIONS (Continued)

AEC WIND OBSERVED RUN MODEL DJ.M STRESS COMPUTED MAXIMUM AND TIME INITIAL BOTTOM WIND STRESS COEFS. CORR.

FEAK RECORDED DATA INCREMENT

RISE, FRICTION x 10'6 FACTOR ELEV.,

ELEV.,

HERDICM:E LOCATION H0 DEL SOURCE - HOURS FEET COET.

CSK1 CSK2 x 10-6 MLW MLW REMAPKS Carol Earragansett Day AEC AEC 1

.5

.02 1.5 9.16 10.67 Observed peak surge values of hydrograph arc an extraplation.

Karragansett Bay D&M D&M 3&2 0.12-001 1.8 2.2 12.81 10.83 Observed hydrograph on cocputed printout is not the same as that listed in Blue Eook (Appendix D).

Computed peak value compares to 12.63, the observed maximum cn printout.

Audrey Eugene Island AEC AEC 2

1.95

.030 1.1 8.33 8.40 Timing is good; fit is poor.

Eugene Island D&H D&M 2&1 2.32

.001 0.8 1.0 8.18 8.15 Recording gage is located on an island - not on opca coast.

Computations carried on past island to main land.

f Eugene Island D&M AEC 2

1.00

.030 1.0 1.0 5.76 8.40 Pass Christian Camille AEC AEC 1

1.2 0025 1.4 25.07 25 only one obscrvation at high vatar mark.

Biloxi D&M D&M 6&3 1.20

.002 1.0 1.4 19.41 19.15 No hydrograph available - only p.sk value. Computer printout peak v..Its is listed as 21.41 ft. MLW, s-hic!, is at variance with Blue Book, p. 70 (19.41).

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T

e SUfMARY OF HURRICANE VERIFICATIONS (Continued)

AEC WIND OBSERVED RUN MODEL DMt STRESS COMPUTED MAXINUM AND TIME INITIAL EOTTOM WIND STRESS COEFS. CORR.

FEAK RECORDED DATA INCREMENT RISE.,

FRICTON x 10' FACTOR ELEV.,

ELEV.,

IU RICANE IDCATION MODEL SOURCE

-HOURS FEET COEF.

CSK1 CSK2 x 10-6 pty pty pt:ggys MIII Pass Christian AEC AEC 0.5 0.80

.003 1.1 33.8 Not verified by sensitivity studj of hurricanc parancters, f

Crystal AEC AEC 1&.5 0.60 003 1.1

'35.4 d

Crystal D&M DMt 1&.25 0.60

.003 1.0 1.4 31.35 D & M bottom profile appears to cause early peaking;. Peak reducc3 2 feet for ovcriand flooding.

Test Case 1 AEC AEC

.5 0.00

.003 1.0 A constant wind stress coefficitat, AEC DMt

.1 0.00

.003 1.0

=,,.5 x

, was used.,

DMI D&M 1.*

0.00

.003 a

D&M AEC 1.*

0.00

.003 Test Case 2 AEC AEC

.5 0.00

.003 1.0 s

AEC D&M

.1 0.00

.003 1.0

~

D&M D&M g,*

0.00 003 D&M AEC 1.*

0.00

.d03

\\

  • Variable time increment used in Dames & Moore model.

)

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