FLOOD04994

• County: Statewide
• Community: na
• Basin: Statewide
• Title: Guidelines on Selection of Acceptable Flood Capacity for Dams
• Date: 3/1/2000
• Prepared By: Australian National Committee on Large Dams
• Floodplain - Doc Type: Educational/Technical/Reference Information

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

I

~
.:;;>-

TABLE A2.1.

PROBABILITY OF EXCEEDANCE OVER A PERIOD OF YEARS.

AEP/Years. 20 SO 100
200
10" I:SOOOO 1:20000 1 : 10000 1
SOOO
10'> 1 : SOOO 1 : 2000 1 : 1000 1 .
SOO
10-4 1 : SOO.5 I : 200.S 1 : 100.5 1
SO.5
10-3 1 : SO.5 I: 20.S I: 10.S 1
S.5
10-2 1 : S.5 1 : 2.5 1 : 1.6 I
1.2
Note the figures have been rounded to 1 decimal point for AEP to 10.4, and to the nearest 10
for AEP 10-> and 10-6,

A2.2.RELATED GUiDELINES.
(Ref. Chapter 2 Changes from 1986
Guidelines on Desigu Floods for Dams).
The following Guidelines should be
referenced in conjunction with assessment
of dam hydrologic safety:

A2.2.1, ANCOLD Guidelines.

Guidelines on Risk Assessment, 1994:
provide the detailed procedures for risk
assessment and risk criteria (revised
guidelines being prepared),

Guidelines on Assessment of the
Consequences of Dam Failure, 2000:
include a matrix basis to quantify and rank
consequences for Hazard Categories,
Table 3.

Guidelines on Dam Safety Management,
1994: provide a basis for operation,
surveillance, and emergency management.

Guidelines on Tailings Dam Design,
Construction and Operation, October

f999: includes provlSlons for water
management and floods.

A2,2.2, IEAust.

Book VI "Estimation of Large to Extreme
Floods", Nathan, R.I., & Weinmann, P.E.,
(1999).
Australian Rainfall and Runoff, A Guide
to Flood Estimation. National Committee
on Water Engineering (ed) Institution of
Engineers, Australia.

Note: The AFC Guidelines do not repeat
detailed procedures from the above
guidelines.

.....,.,..-,..-.7 1"'\ ,.......__~J~';.~_~......... ~nllu..tfrr." "(ON Accentable flood Ca1JQcitv for Dams