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## Minimum Time of Concentration (tc) Setting

5 minutes is commonly used as the minimum value for the Time of Concentration. This is due to the storm duration used in the IDF curve equation which is valid between 0.0833 hours (5 minutes) to 72 hours and is referred in Storm Management Manual for Malaysia (MSMA)....

## Starting Water Level for Retention Pond

Latest MiTS 1 and 2 allows users to compute the analysis at any level of Starting Water Level (SWL), especially for the retaining pond. Default value is maintained as before which is the total of Invert Level (IL) and Height of bottom orifice (Invert Level + H). ...

## Benchmark for Rational Detention Pond Method– MSMA 2 Appendix 7A

Purpose:  To benchmark MES results with MSMA 2 detention pond rational method  (Chapter 7 Appendix A) Sample MiTS 2 Project file here  Manual Spreadsheet here MSMA 2nd Edition here  Pre Development  Tc and Rainfall Intensity  For benchmarking purposes, we will...

## Stage-Storage Relationship and Stage Discharge Relation and Storage Indicator Numbers

For Pond Routing, reference is made from MSMA 2nd Edition; Chapter 7 Detention Pond  MSMA 2nd Edition 1. Stage-Storage Relationship For Example; at stage 1.5m; V = [(A1 + A2 ) / 2 ]  * 0.5     = (7275 + 7360 / 2) * 0.5     =...

## Pond Routing

Reference: MSMA 2nd Edition; Chapter 2; 2.5 Hydrological Routing MSMA 2nd Edition; Chapter 7 – Detention Pond  How to perform routing through a reservoir or storage facility using Equation 2.17 Step 1: Develop: i. Inflow hydrograph  Rational Method refer Chapter...

## Case Study on the Differences of Pond and OSD Rational Method

A case study between OSD Rational Method and Pond Rational Method has been done, to compare the difference between these two stormwater managements.  Project references: Project File for Pond Rational Method Project File for OSD Rational Method   Similarity...