Table of Contents
For Pond Routing, reference is made from MSMA 2nd Edition; Chapter 7 Detention Pond
1. Stage-Storage Relationship #
For Example; at stage 1.5m; #
V = [(A1 + A2 ) / 2 ] * 0.5
= (7275 + 7360 / 2) * 0.5
= 3658.75m3 + 6599m3
= 10257.75m3 10258m3
2. Stage-Discharge Relation and Storage Indicator Numbers #
For Example: let’s take H = 1.5m, #
Calculate O (m3/s) at H = 1.5m;
Note: please refer to Figure 2.8 on how to take the ‘Ho‘
V = Co Ao (2gHo)0.5 (Equation 2.6 & Figure 2.8; MSMA 2nd Edition)
= 0.6 (2) ( 2 * 9.81 * (1.5-0.5))0.5
= 5.32m3/s
Calculate (S/Δt) + O/2 (m3/s)
Note: Δt is the pond routing time step, hence in this example Δt = 1min
(S/Δt) + O/2 = (10258m3 / 60sec) + 5.32m3/s
= 173.626 m3/s