Watch a Flash movie explaining the Malayisa storm features in
MIDUSS. |
The Malaysian
version of MIDUSS has an extra item
in the Hydrology menu to define design storms for use
in Malaysia. Click on this to open the window Storms
(Malaysia). |
Follow the prompts
in the yellow box
and select the return period of the storm. |
Next you should
define the storm duration. Note that
if the duration is less than 30 minutes you must also
define the 2-year, 24-hour rainfall depth. In this example
the duration is set to 90 minutes. |
This map shows
isohyetals of the 2-year, 24-hour rainfall
for West malaysia. It can be opened or closed with the
[Show Map] button. |
You can then select
a location from the drop-down list
to load the coefficients for the 5-year storm in this part
of Selangor Province. Clicking on the row copies the four
coefficients to the main window. |
Click on the
[Compute Storm] button to calculate
the total storm depth and the maximum rainfall intensity. |
To copy the storm
characterstics to MIDUSS Storm command
click on the [Copy] button. The total depth and duration are
copied. Also, the rainfall distribution is defined by a mass
rainfall
distribution file. Here we must use the 120 minute file for
Western
Malaysia. In most cases this will be selected automatically by
MIDUSS. |
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Finally, click
[Display] on the Storm command window to display
the hyetograph in both tabular and graphical form. Then click the
[Accept] button to adopt this design storm for the remainder
of
the simulation. |
Please click on
this image to see an example. |
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