#design rainfall

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storm temporal pattern Phone 6012)-7102620

http://msmaware.com/blog/enquiry-about-msmaware-software/ Phone 6012-710-2620

Manual Saliran Mesra Alam Malaysia (MSMA), or the Urban Stormwater Management Manual for Malaysia is the urban drainage design guideline first produced by the Department of Irrigation and Drainage Malaysia (D.I.D) in 2000. It is required by law for all engineers in Malaysia to build drainage works to comply with the requirements of MSMA. 11 years after its first publication, DID has completely revised the first edition of MSMA (MSMA1) with the release of the second edition (MSMA2). There are many alterations in the second edition including the following (taken from case studies done for Kuala Lumpur):

1. The design storm has risen by up to 126% for ten out of the 14 storm stations in Kuala Lumpur.

2. The design flow using the Rational Method has gone up by up to 131% for commercial and city area.

3. The Site Storage Requirement for OSD for a factory lot in Kuala Lumpur has risen by up to 235%,

4. The volume of a detention basin has gone up by up to 130%.

The hike in the values of the main design parameters as described above can be attributed to the changes between the first and the second editions of MSMA as follows:

1. Longer rainfall data covering 100 more storm stations in Peninsular Malaysia. This results in higher storm intensities for certain durations and Average Recurrence Intervals.

2. West Malaysia is now separated into 5 regions for the determination of the storm 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.

3. The coefficient of runoff in the Rational Method is now fixed according to the types of landuse, and not influenced by storm durations and intensities, and whether a catchment is urban/rural in condition. This gives rise to changes in the estimated peak flow.

4. The Time-Area Method in the second editon is affected by the changes in the storm intensites, temporal patterns and the loss model used. For Kuala Lumpur it is noticed that the storm intensities have increased and the storm temporal pattern is more peaky, thus giving rise to a more peaky flow hydrograph.

5. The Site Storage Requirement (SSR) based on the Approximate Swinburne Method in the second editon is higher than that using the Swinburne Method in MSMA1. The second editon used the approximate method based on a set of approximation tables and this has resulted in an over estimation of the Site Storage Requirements.

6. The volume of a detention basin has risen using the second editon compared to MSMA1 because of the increase in the storm intensities, temporal patterns and the choice of loss rate.

In view of the many changes in computational methods 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 changes quickly. The tool is a stormwater design software created for MSMA- known as the MSMAware. The software is created by Ir. Dr. Quek Keng Hong who is a professonal engineer in Malaysia. MSMAware also covers the East Malaysian state of Sarawak where more than a dozen storm stations in the state and their temporal patterns are programmed into the software.

STORM TEMPORAL PATTERN : 00:00:05 storm temporal pattern 00:00:05 Rational Method 00:00:06 Time-Area Method 00:00:07 culvert design 00:00:08 culvert analysis

New Post has been published on http://dimitrivroldan.squarebook.biz/2015/10/26/msma2-ph-6012-710-2620/

MSMA2 Ph 6012 710 2620

http://msmaware.com/blog/main/ Phone (6012)-7102620

Manual Saliran Mesra Alam Malaysia (MSMA), which is known in English as the Urban Stormwater Management Manual for Malaysia is the urban stormwater drainage design guideline first produced by the Department of Irrigation and Drainage Malaysia (D.I.D) in 2000. It is mandatory for all engineers in Malaysia to build drainage structures to comply with the requirements of MSMA. Eleven years after its first publication, DID has completely updated the first edition of MSMA (MSMA1) with the release of the second edition (MSMA2). There are numerous alterations in the second edition including the following (based on case studies carried out for Kuala Lumpur):

1. The design storm has gone up by up to 126% for 10 out of the 14 storm stations in Kuala Lumpur.

2. The design flow using the Rational Method has increased by up to 131% for commercial and city area.

3. The Site Storage Requirement for On-Site Detention for a factory site in Kuala Lumpur has gone up by up to 235%,

4. The storage of a detention pond has increased by up to 130%.

The rise in the values of the main design parameters as described above can be attributed to the differences between the first and the second editions of MSMA as follows:

1. Longer storm data covering 100 more storm stations in Peninsular Malaysia. This results in higher storm intensities for certain durations and Average Recurrence Intervals.

2. West Malaysia is now grouped into five regions for the determination of the storm 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 dissimilar hydrograph peaks and shapes.

3. The coefficient of runoff in the Rational Method is now established according to the types of landuse, and not affected by storm durations and intensities, and whether a catchment is urban/rural in condition. This gives rise to differences in the estimated peak flow.

4. The Time-Area Method in the second editon is affected by the differences 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 storm temporal pattern is more peaky, thus resulting in a more peaky flow hydrograph.

5. The Site Storage Requirement (SSR) based on the Approximate Swinburne Method in the second editon is higher than that using the Swinburne Method in MSMA1. The second editon used the approximate method based on a set of approximation tables and this has resulted in an over estimation of the SSR’s.

6. The storage of a detention pond has gone up using the second editon compared to MSMA1 because of the increase in the storm intensities, temporal patterns and the choice of loss rate.

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 carry out the computations using both editions precisely and to allow comparison be made of their differences speedily. The tool is a stormwater design software designed for MSMA- under the brandname of the MSMAware. The software is programmed by Ir. Dr. Quek Keng Hong who is a practising professional engineer in Malaysia. MSMAware also covers the East Malaysian state of Sarawak where more than a dozen storm stations in the state and their temporal patterns are included into the software.

MSMA2 : 00:00:05 MSMA2 00:00:06 On-Site Detention 00:00:07 0SD 00:00:08 detention pond 00:00:09 detention basin

New Post has been published on http://dimitrivroldan.squarebook.biz/2015/10/26/design-storm-ph-6012-710-2620/

design storm Ph 6012 710 2620

http://msmaware.com/blog/download-dr-queks-msma2-papers/ Phone (6012)710 2620

Manual Saliran Mesra Alam Malaysia (MSMA), which is known in English as the Urban Stormwater Management Manual for Malaysia is the urban stormwater drainage design guideline first published by the Department of Irrigation and Drainage Malaysia (D.I.D) in 2000. It is mandatory for all engineers in Malaysia to build drainage system to fullfil the requirements of MSMA. Eleven years after its first publication, DID has completely revised the first edition of MSMA (MSMA1) with the publication of the second edition (MSMA2). There are many differences in the second edition include (taken from case studies done for Kuala Lumpur):

1. The design storm has risen by up to 126% for ten out of the 14 storm stations in Kuala Lumpur.

2. The design discharge using the Rational Method has risen by up to 131% for commercial and city area.

3. The Site Storage Requirement for On-Site Detention for a factory lot in Kuala Lumpur has risen by up to 235%,

4. The volume of a detention pond has risen by up to 130%.

The increase in the magnitudes of the main design parameters as described above can be due to the differences between the first and the second editions of MSMA as follows:

1. Longer storm data covering 100 more rainfall stations in Peninsular Malaysia. This gives rise to in higher storm intensities for certain durations and ARI’s.

2. West Malaysia is now divided into five regions for the computation of the 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.

3. The coefficient of runoff in the Rational Method is now established according to the types of landuse, and not influenced by storm durations and intensities, and whether a catchment is urban/rural in condition. This gives rise to differences in the estimated peak discharge.

4. The Time-Area Method in MSMA2 is affected by the differences in the storm intensites, temporal patterns and the loss model used. For Kuala Lumpur it is noticed that the storm intensities have increased and the temporal pattern is more peaky, thus giving rise to a more peaky discharge hydrograph.

5. 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. MSMA2 used the approximate method based on a set of approximation tables and this has resulted in an over estimation of the SSR’s.

6. The volume of a detention pond has risen using MSMA2 compared to the first edition because of the increase in the storm intensities, temporal patterns and the choice of loss rate.

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 speedily. The tool is a urban drainage design software designed for MSMA- known as the MSMAware. The software is programmed by Ir. Dr. Quek Keng Hong who is a professonal engineer in Malaysia. MSMAware also covers the East Malaysian state of Sarawak where more than a dozen storm stations in the state and their temporal patterns are programmed into the software.

DESIGN STORM : 00:00:05 design storm 00:00:06 design rainfall 00:00:07 temporal pattern 00:00:08 rainfall temporal pattern 00:00:09 storm temporal pattern

New Post has been published on http://dimitrivroldan.squarebook.biz/2015/10/26/design-rainfall-ph-6012-710-2620/

design rainfall Ph 6012 710 2620

http://msmaware.com/blog/msma-manual-saliran-mesra-alam-malaysia-urban-stormwater-management-manual-for-malaysia/ Phone 6012-710-2620

Manual Saliran Mesra Alam Malaysia (MSMA), or in English the Urban Stormwater Management Manual for Malaysia is the urban drainage design guideline first distributed by the Department of Irrigation and Drainage Malaysia (D.I.D) in 2000. It is mandatory for all engineers in Malaysia to build drainage system to comply with the requirements of MSMA. 11 years after its first publication, DID has completely amended the first edition of MSMA (MSMA1) with the publication of the second edition (MSMA2). There are many differences in the second edition including the following (based on case studies carried out for Kuala Lumpur):

1. The design storm has risen by up to 126% for 10 out of the 14 rainfall stations in Kuala Lumpur.

2. The design flow using the Rational Method has gone up by up to 131% for commercial and city area.

3. The Site Storage Requirement for On-Site Detention for a factory lot in Kuala Lumpur has risen by up to 235%,

4. The volume of a detention basin has gone up by up to 130%.

The rise in the values of the main design parameters as outlined above can be due to the changes between the first and the second editions of MSMA as follows:

1. Longer storm data covering 100 more storm stations in Peninsular Malaysia. This gives rise to in higher rainfall intensities for certain durations and Average Recurrence Intervals.

2. West Malaysia is now divided into 5 regions for the derivation of the storm 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.

3. The coefficient of runoff in the Rational Method is now established according to the types of landuse, and not influenced by storm durations and intensities, and whether a catchment is urban/rural in condition. This resulted in changes in the estimated peak flow.

4. 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 noticed that the storm intensities have increased and the storm temporal pattern is more peaky, thus giving rise to a more peaky flow hydrograph.

5. The Site Storage Requirement (SSR) based on the Approximate Swinburne Method in MSMA2 is higher than that using the Swinburne Method in MSMA1. MSMA2 used the approximate method based on a set of approximation tables and this has resulted in an over estimation of the Site Storage Requirements.

6. The volume of a detention basin has risen using MSMA2 compared to MSMA1 because of the increase in the storm intensities, temporal patterns and the choice of loss rate.

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

DESIGN RAINFALL : 00:00:05 design rainfall 00:00:05 temporal pattern 00:00:06 rainfall temporal pattern 00:00:07 storm temporal pattern 00:00:08 Rational Method

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MSMA Ph 6012)710 2620

http://msmaware.com/blog/get-free-msma-newsletter/ Ph 6012-710-2620

Manual Saliran Mesra Alam Malaysia (MSMA), which is known in English as the Urban Stormwater Management Manual for Malaysia is the urban stormwater drainage design procedure first distributed by the Department of Irrigation and Drainage Malaysia (D.I.D) in 2000. It is mandatory for all engineers in Malaysia to build drainage works to fullfil the requirements of MSMA. Eleven years after its first publication, DID has completely amended the first edition of MSMA (MSMA1) with the publication of the second edition (MSMA2). There are a lot of alterations in the second edition including the following (based on case studies completed for Kuala Lumpur):

1. The design rainfall has increased by up to 126% for ten out of the fourteen storm stations in Kuala Lumpur.

2. The design discharge using the Rational Method has gone up by up to 131% for commercial and city area.

3. The Site Storage Requirement for On-Site Detention for a factory site in Kuala Lumpur has increased by up to 235%,

4. The storage volume of a detention basin has gone up by up to 130%.

The hike in the values of the main design parameters as outlined above can be due to the differences between the first and the second editions of MSMA as follows:

1. Longer storm data covering 100 more storm stations in Peninsular Malaysia. This gives rise to in higher storm intensities for certain durations and Average Recurrence Intervals.

2. West Malaysia is now separated into 5 regions for the determination of the storm 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.

3. The coefficient of runoff in the Rational Method is now fixed according to the types of landuse, and not dependent on rainfall durations and intensities, and whether a catchment is urban/rural in condition. This gives rise to differences in the estimated peak discharge.

4. The Time-Area Method in MSMA2 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 storm temporal pattern is more peaky, thus giving rise to a more peaky discharge hydrograph.

5. The Site Storage Requirement (SSR) based on the Approximate Swinburne Method in MSMA2 is higher than that using the Swinburne Method in MSMA1. The second editon used the approximate method based on a set of approximation tables and this has resulted in an over estimation of the SSR’s.

6. The storage volume of a detention basin has increased using MSMA2 compared to MSMA1 because of the increase in the rainfall intensities, temporal patterns and the choice of loss rate.

In view of the many differences in computational methods between the first and second editions of MSMA, a tool is developed to help engineers to perform the computations using both editions accurately and to allow comparison be made of their differences quickly. The tool is a drainage design software created for MSMA- which is known as the MSMAware. The software is created by Ir. Dr. Quek Keng Hong who is a practising engineer in Malaysia. MSMAware also covers the East Malaysian state of Sarawak where more than a dozen rainfall stations in the state and their temporal patterns are programmed into the software.

MSMA : 00:00:05 MSMA 00:00:06 drainage design guideline 00:00:07 Manual Saliran Mesra Alam Malaysia 00:00:08 Urban Stormwater Management Manual for Malaysia 00:00:09 Urban Stormwater Management Manual

New Post has been published on http://dimitrivroldan.squarebook.biz/2015/10/22/idf-call-6012-710-2620/

IDF Call 6012-710-2620

http://msmaware.com/blog/get-free-msma-newsletter/ Call 6012 710 2620

Manual Saliran Mesra Alam Malaysia (MSMA), also known as the Urban Stormwater Management Manual for Malaysia is the urban drainage design procedure first printed by the Department of Irrigation and Drainage Malaysia (D.I.D) in 2000. It is compulsory for all engineers in Malaysia to design drainage system to comply with the requirements of MSMA. Eleven years after its first publication, DID has completely updated the first edition of MSMA (MSMA1) with the release of the second edition (MSMA2). There are numerous alterations in the second edition including (taken from case studies completed for Kuala Lumpur):

1. The design storm has risen by up to 126% for 10 out of the fourteen rainfall stations in Kuala Lumpur.

2. The design discharge using the Rational Method has risen by up to 131% for commercial and city area.

3. The Site Storage Requirement for OSD for a factory site in Kuala Lumpur has risen by up to 235%,

4. The storage of a detention basin has risen by up to 130%.

The hike in the values of the main design parameters as described above can be due to the changes between the first and the second editions of MSMA as follows:

1. Longer rainfall data covering 100 more storm stations in Peninsular Malaysia. This gives rise to in higher rainfall intensities for certain durations and ARI’s.

2. Peninsular Malaysia is now separated into five regions for the computation of the 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.

3. The coefficient of runoff in the Rational Method is now set according to the types of landuse, and not influenced by storm durations and intensities, and whether a catchment is urban/rural in condition. This resulted in changes in the estimated peak discharge.

4. 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 temporal pattern is more peaky, thus resulting in a more peaky discharge hydrograph.

5. 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 second editon used the approximate method based on a set of approximation tables and this has resulted in an over estimation of the Site Storage Requirements.

6. The storage of a detention basin has risen using MSMA2 compared to the first edition because of the increase in the storm intensities, temporal patterns and the choice of loss rate.

In view of the many changes 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 accurately and to allow comparison be made of their changes quickly. The tool is a drainage design software created 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.

IDF : 00:00:05 IDF 00:00:05 IDF Curve 00:00:06 MSMA 00:00:07 drainage design guideline 00:00:08 Manual Saliran Mesra Alam Malaysia

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detention pond Call 6012 710-2620

http://msmaware.com/blog/download-dr-queks-msma2-papers/ Ph (6012)-7102620

Manual Saliran Mesra Alam Malaysia (MSMA), also known as the Urban Stormwater Management Manual for Malaysia is the stormwater drainage design standard first published by the Department of Irrigation and Drainage Malaysia (D.I.D) in 2000. It is required by law for all engineers in Malaysia to build drainage system to fullfil the requirements of MSMA. 11 years after its first publication, DID has completely amended the first edition of MSMA (MSMA1) with the release of the second edition (MSMA2). There are a lot of differences in the second edition include (taken from case studies completed for Kuala Lumpur):

1. The design storm has increased by up to 126% for ten out of the 14 storm stations in Kuala Lumpur.

2. The design flow using the Rational Method has increased by up to 131% for commercial and city area.

3. The Site Storage Requirement for On-Site Detention for a factory site in Kuala Lumpur has increased by up to 235%,

4. The storage volume of a detention basin has increased by up to 130%.

The hike in the values of the main design parameters as described above can be attributed to the changes between the first and the second editions of MSMA as follows:

1. Longer storm data covering 100 more rainfall stations in Peninsular Malaysia. This results in higher storm intensities for certain durations and ARI’s.

2. Peninsular Malaysia is now separated into 5 regions for the determination of the storm 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.

3. The coefficient of runoff in the Rational Method is now fixed according to the types of landuse, and not influenced by storm durations and intensities, and whether a catchment is urban/rural in condition. This gives rise to changes in the estimated peak flow.

4. The Time-Area Method in the second editon 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 storm temporal pattern is more peaky, thus giving rise to a more peaky flow hydrograph.

5. The Site Storage Requirement (SSR) based on the Approximate Swinburne Method in the second editon is higher than that using the Swinburne Method in MSMA1. MSMA2 used the approximate method based on a set of approximation tables and this has resulted in an over estimation of the SSR’s.

6. The storage volume of a detention basin has increased using the second editon compared to MSMA1 because of the increase in the storm intensities, temporal patterns and the choice of loss rate.

In view of the many changes 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 accurately and to allow comparison be made of their changes quickly. The tool is a urban drainage design software developed for MSMA. The software is programmed by Ir. Dr. Quek Keng Hong- a practising professional engineer in Malaysia. MSMAware also covers the East Malaysian state of Sarawak where more than a dozen storm stations and their temporal patterns are programmed into the software.

DETENTION POND : 00:00:05 detention pond 00:00:06 detention basin 00:00:07 design storm 00:00:08 design rainfall 00:00:09 temporal pattern

New Post has been published on http://dimitrivroldan.squarebook.biz/2015/10/21/detention-basin-ph-6012-7102620/

detention basin Ph 6012-7102620

http://msmaware.com/blog/msma-manual-saliran-mesra-alam-malaysia-urban-stormwater-management-manual-for-malaysia/ Ph 6012 710 2620

Manual Saliran Mesra Alam Malaysia (MSMA), or in English the Urban Stormwater Management Manual for Malaysia is the urban drainage design standard first issued by the Department of Irrigation and Drainage Malaysia (D.I.D) in 2000. It is required by law for all engineers in Malaysia to build drainage works to fullfil the requirements of MSMA. 11 years after its first publication, DID has completely revised the first edition of MSMA (MSMA1) with the publication of the second edition (MSMA2). There are numerous alterations in the second edition include (taken from case studies done for Kuala Lumpur):

1. The design storm has increased by up to 126% for 10 out of the 14 rainfall stations in Kuala Lumpur.

2. The design discharge using the Rational Method has increased by up to 131% for commercial and city area.

3. The Site Storage Requirement for OSD for a factory lot in Kuala Lumpur has increased by up to 235%,

4. The volume of a detention pond has increased by up to 130%.

The hike in the magnitudes of the main design parameters as described above can be attributed to the differences between the first and the second editions of MSMA as follows:

1. Longer storm data covering 100 more storm stations in Peninsular Malaysia. This gives rise to in higher rainfall intensities for certain durations and ARI’s.

2. West Malaysia is now divided into 5 regions for the determination of the storm 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 dissimilar hydrograph peaks and shapes.

3. The coefficient of runoff in the Rational Method is now set according to the types of landuse, and not influenced by storm durations and intensities, and whether a catchment is urban/rural in condition. This resulted in differences in the estimated peak discharge.

4. The Time-Area Method in the second editon is affected by the differences 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 storm temporal pattern is more peaky, thus resulting in a more peaky discharge hydrograph.

5. The Site Storage Requirement (SSR) based on the Approximate Swinburne Method in the second editon is higher than that using the Swinburne Method in MSMA1. MSMA2 used the approximate method based on a set of approximation tables and this has resulted in an over estimation of the Site Storage Requirements.

6. The volume of a detention pond has increased using the second editon compared to MSMA1 because of the increase in the storm intensities, temporal patterns and the choice of loss rate.

In view of the many differences in computational methods 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 speedily. The tool is a drainage design software designed for MSMA. The software is created by Ir. Dr. Quek Keng Hong- a practising professional engineer in Malaysia. MSMAware also covers the East Malaysian state of Sarawak where more than a dozen storm stations and their temporal patterns are programmed into the software.

DETENTION BASIN : 00:00:05 detention basin 00:00:05 design storm 00:00:06 design rainfall 00:00:07 temporal pattern 00:00:08 rainfall temporal pattern