Urban Stormwater Management Manual training Call 6012 710-2620

http://ift.tt/1PFJNLZ Ph (6012)710 2620 The stormwater drainage design standard first issued by the Department of Irrigation and Drainage Malaysia in 2000 is the Urban Stormwater Management Manual for Malaysia or the Manual Saliran Mesra Alam (also known as MSMA). It is required by law for all engineers in Malaysia to design drainage system 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 publishing of the second edition (or MSMA2) about Eleven years after its first edition. There are numerous changes in the second edition including the following (based on case studies done for Kuala Lumpur): The design rainfall has gone up by up to 126% for ten out of the 14 rainfall stations in Kuala Lumpur. For commercial and city area, the design flow using the Rational Method has gone up by up to 129%. For a factory lot in Kuala Lumpur the Site Storage Requirement for OSD has gone up by up to 235%. Detention pond has gone up by up to 129% in the storage. The differences between the first and the second editions of MSMA give rise to the rise in the values of the main design parameters as follows: Longer storm data covering 100 more rainfall stations in Peninsular Malaysia. The rainfall intensities for most ARI's are higher. Peninsular Malaysia is now separated into 5 regions for the computation of the rainfall temporal pattern, compared to previously where it was divided into east and west coast of the Peninsula. The differences in temporal patterns give rise to different hydrograph peaks and shapes. Not influenced by rainfall durations and intensities, and whether a catchment is urban/rural in condition, the coefficient of runoff in the Rational Method is now determined according to the types of landuse. This resulted in differences in the estimated peak flow. The Time-Area Method in the second editon is affected by the differences in the rainfall intensites, temporal patterns and the loss model used. For Kuala Lumpur it is noted that the rainfall intensities have increased and the rainfall temporal pattern is more peaky, thus giving rise to a more peaky flow hydrograph. The Approximate Swinburne Method in the second editon resulted in higher Site Storage Requirement (SSR) than the Swinburne Method in MSMA1. The approximate method in the second editon has given rise to an over estimation of the SSR's. Compared to MSMA1, the increase in the rainfall intensities, temporal patterns and the choice of loss rate have resulted an increase in the storage of a detention pond using the second edition. In view of the many differences in computational procedures between the first and second editions of MSMA, a tool is developed to help engineers to perform the computations using both editions precisely and to allow comparison be made of their differences quickly. A drainage design software is created for MSMA. The software is written by Ir. Dr. Quek Keng Hong- a practising professional engineer in Malaysia. MSMAware also includes more than a dozen rainfall stations and their temporal patterns in the Sarawak. URBAN STORMWATER MANAGEMENT MANUAL TRAINING : 00:00:05 Urban Stormwater Management Manual training 00:00:06 Department of Irrigation and Drainage Malaysia 00:00:08 MSMA2 00:00:09 MSMA software 00:00:11 MSMA workshop Urban Stormwater Management Manual training Call 6012 710-2620
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