MSMA is a comprehensive manual issued by Department of Irrigation and Drainage (DID) Malaysia in 2000. It is a how-to-do-it guide on how Urban Drainage should be practiced in Malaysia. MSMA stands for “Manual Saliran Mesra Alam” (Manual for Environmentally friendly drainage).
According to Charles A. Doswell, a flash flood can be defined as an event where the rising water occurs during or a matter of a few hours after the associated rainfall. If the damaging water level increases occur more than a few hours after the rainfall, the event is considered to be a flood and not a flash flood.
DID in general appreciates information on the causes as well as sources of river pollution. However, DID is not the enforcement authority on pollution control. Please refer the problems to the Department of Environment (DOE) or the Natural Resources and Environment Board (NREB).
These  information are published annually by our  Hydrology and Water Resource  Division which is located on the 9th Floor, Wisma  Saberkas, Kuching.  On-line information on rainfall and major river levels in the  State are  available at  http://ihydro.did.sarawak.gov.my/iHydro/home.jsp
DID is not responsible for your domestic or industrial water supply, DID is only responsible for irrigation water supply for the farmers. Please contact the relevant authorities such as Kuching Water Board (Kuching City), Sibu Water Board (Sibu Town), LAKU (Miri, Bintulu and Limbang) or the Public Works Department (for rural and other areas) who will bill you for your water supply.
Both  DID and the appropriate  local authority are responsible for drainage.  In general the local authority is  responsible for the construction and  maintenance of the local drainage system  which is mainly of secondary  drains.  DID Sarawk is responsible for the main  trunk drains and the  rivers which may flow within and outside the local  authority areas.
Floodings  caused by choked drains and culverts fall  under  the responsibility of  the local authority. Floodings caused by  overspilling of rivers due to  inadequate capacity is normally the responsibility  of DID. 
You may like to log on to http://www.did.sarawak.gov.my and make your report. To clear further doubts or for further information please  contact our PRO, email jps@sarawak.gov.my or telephone  6082-243241.
The "Sarawak River Board" is responsible for the management of the Gazetted Rivers in the State, however DID is responsible in all engineering aspects.
The main  Programmes are:
i.   Water Management and Implementation of Drainage and  Irrigation Projects
ii.  Urban Flood Mitigation
iii. River and Coastal  Engineering
iv. Hydrology and Water Resources
v.  Implementation of Rural  Roads
DID Sarawak is a State Government Agency. However, we are answerable to both the State and Federal Government as we are allocated with both State and Federal Funds.
Please refer this matter to the appropriate local authority responsible for the maintenance of these drains.
Telephone : +6082-243241
                     JPS careline : 1-300-80-1010
Fax : +6082-426400
Email : jps@sarawak.gov.my
Website : www.did.sarawak.gov.my
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