1. Project file MiTS 2 here
2. Software Report here
3. Manual Excel Spreadsheet here
4. Linear interpolator here

*kindly informed that you will need to download the manual excel spreadsheet and software report

Objective

1. Comparison between software calculation and manual calculation. To ensure that the results are the same
2. Software extract the correct value from Table in MSMA 2

OSD Sizing Procedure (MSMA 2 – Simplified Method) #

Manual Excel Spread Sheet

MiTS Software

Design Criteria

Design Manual: MSMA 2

Method: Simplified Method

Type of OSD = Below Ground

Proposed Development

Location: Kuala Lumpur

Region: Region 1 – West Coast

Impervious = 0.8 ha ; Pervious = 0.2 ha

Terrain = Lowlying

Permissible Site Discharge (PSD) & Site Storage Requirement (SSR) #

Table 5.A1Interpolate;PSD = 65.3 l/s/ha, SSR = 499 m3

Table 5.A1

Table 5.A1

Table 5.A2Interpolate:PSD : 62.1 l/s/ha, SSR : 487.3 m3, Inlet : 196.67 l/s/ha

Table 5.A2

Table 5.A2

OSD Tank Sizing #

Inlet & Outlet Sizing #

Table 5.ATable 5.A3 Interpolate; Volume (m3) : 500 m3 Inlet & Overflow Dia. (mm): 510 mm Outlet Dia. (mm) : 195 mm Table 5.A4 Interpolate; i) Determine the Overflow Pipe Diameter using Inlet Flow obtained from Table 5.A2 as discharge : 0.1967    m3/s Pipe diameter = 448 mm ii) Determine the Outlet Pipe Diameter using PSD value obtained from Table 5.A2 as discharge 0.0621 Pipe diameter = 294 mm

Table 5.A

Table 5.A3

Table 5.A4