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Why OSD simplified method is always ARI 10 years

On-Site Detention User may inquiry why on simplified method, the ARI is always 10 years. Based on Chapter 5 (On-site Detention) accordance to MSMA 2nd Edition, it is stated that the design storm shall be 10 year ARI accordance with the minor drainage system (Section...

How to use Drainage design outside West Malaysia

Use Drainage Design in Sabah/Sarawak How to set the rainfall intensity for Sabah and Sarawak MSMA (2011) covers the IDF data of 12 states and federal territory in Peninsular Malaysia. Sabah and Sarawak are not covered. The rainfall IDF data for Sarawak is being...