MSMA2 Ph Call 6012)-7102620

MSMA2 Ph Call (6012)-7102620

http://msmaware.com/blog/manual-saliran-mesra-alam-malaysia-msma-software-program-tool/
Telephone call (6012)-7102620

In 2000 the Department of Irrigation and Drainage Malaysia first issued the stormwater drainage design standard known as the Urban Stormwater Management Manual for Malaysia or the Manual Saliran Mesra Alam Malaysia, MSMA. It is compulsory for all engineers in Malaysia to build drainage works to fullfil the requirements of MSMA. The Department of Irrigation and Drainage has completely revised the first edition of MSMA (also known as MSMA1) with the publication of the second edition (known as MSMA2) about Eleven years after its first edition. There are many changes in the second edition including the following (taken from case studies completed for Kuala Lumpur):

The design storm has increased by up to 126% for ten out of the fourteen rainfall stations in Kuala Lumpur.
The design flow using the Rational Method has increased by up to 131% for commercial and city area.
For a factory site in Kuala Lumpur the Site Storage Requirement for On-Site Detention has increased by up to 233%.
Detention basin has increased by up to 128% in the volume.

The changes between the first and the second editions of MSMA resulted the increase in the values of the main design parameters below:

Longer rainfall data covering 100 more storm stations in Peninsular Malaysia. The rainfall intensities for most ARI's are higher.

Compared to the first edition where it was divided into east and west coast of the Peninsula for the determination of the rainfall temporal pattern, Peninsular Malaysia is now divided into five regions. The dissimilar hydrograph peaks and shapes caused by the changes in temporal patterns.

Not dependent on storm durations and intensities, and whether a catchment is urban/rural in condition, the coefficient of runoff in the Rational Method is now set according to the types of landuse. Changes in the estimated peak flow is the result .

The Time-Area Method in MSMA2 is affected by the changes in the storm intensites, temporal patterns and the loss model used. For Kuala Lumpur it is noted that the storm intensities have increased and the rainfall temporal pattern is more peaky, thus resulting in a more peaky flow hydrograph.

The Site Storage Requirement (SSR) based on the Approximate Swinburne Method in MSMA2 is higher than that using the Swinburne Method in the first edition. The approximate method in MSMA2 has caused an over estimation of the Site Storage Requirements.

The volume of a detention basin has increased using MSMA2 compared to the first edition because of the rise in the storm intensities, temporal patterns and the choice of loss rate.

A software program Is built to help engineers to carry out the computations using both editions precisely and to allow comparison be made of their changes speedily, in view of the many changes in computational methods between the first and second editions of MSMA. The tool is a stormwater design software developed for MSMA. The software is programmed by Ir. Dr. Quek Keng Hong- a professonal engineer in Malaysia. MSMAware also covers the East Malaysian state of Sarawak where more than a dozen storm stations and their temporal patterns are included into the software.


https://www.youtube.com/watch?v=61AgP_ky_9E
https://www.youtube.com/watch?v=61AgP_ky_9E
https://www.youtube.com/watch?v=61AgP_ky_9E
MSMA2 Ph Call (6012)-7102620








https://www.youtube.com/watch?v=AWB_c_Jo4pg