Note: Comparison of the H2OMAP SWMM Hazen Williams Force Main Solution to a HW Solution
In this example, we compare the force main head loss in four links in H20Map SWMM to the head loss in a steady state HazenWilliams solution for the same length pipe, diameter and flow
Note: How Dry Weather Flow is Used in InfoSWMM at a Node
There are four components to the Dry Weather Flow (DWF) in InfoSWMM:
1. The mean flow in user units at the node,
2. The DWF Allocation Code – if you are using the DWF Allocator
3. … Read the rest
Subject: Three Inertial Term Options in SWMM 5 and InfoSWMM/H2OMAP SWMM
The dynamic wave flow in SWMM5 and InfoSWMM is calculated from the following equation
Q = (Qold – dq2 + dq3*sigma + dq4*sigma ) / ( 1 + dq1 + dq5)
Where,
Qold = Last Time Step … Read the rest
Subject: Link Simulated Parameters used in either the Normal Flow or St Venant Equation of SWMM 5
St. Venant equation – this is the link attribute data used when the St. Venant Equation is used in SWMM 5. Simulated Parameters from the upstream, midpoint and downstream sections … Read the rest
Subject: Exit, Other and Entrance Loss Values in SWMM 5
The entrance, exit and other losses in SWMM 5 are computed at the upstream, downstream and midpoint of the sections of the link. However, if the normal flow equation is used for the link during a time step … Read the rest
Subject: The Groundwater flow in SWMM 5 Groundwater
The Groundwater flow in SWMM 5 is actually made up of three components:
1. A groundwater flow computed from the coefficient a1 and exponent b1
2. A groundwater flow computed from the coefficient a2 and exponent b2 and
3. A Surface Water … Read the rest
Subject: RDII Initial Abstraction in SWMM 5
The initial abstraction in each of the three components of RDII in SWMM 5 are updated at each time step. The initialabstraction (ia) is:
ia = iaMax – iaUsed
based on the maximum amount of ia, the ia used (iaUsed), the recovery … Read the rest
.
via Blogger http://www.swmm5.net/2013/08/rdii-parameters-for-swmm-5.html… Read the rest
Subject: Steady State Flow Analysis in InfoSWMM using a Ramp DWF
This can be easily created using a few steps in InfoSWMM.
Step 1: Using Scenario Explorer make a cloned Child Scenario and a cloned DWF Set which will be later modified.
Step 2: Using DB Manager and … Read the rest
Subject: Steady State Flow Analysis in InfoSWMM using an External Flow Time Series
This can be easily created using a few steps in InfoSWMM. The flow ramp is in the Routing Interface File. The advantage is that you are able to have different ramps for the various nodes using… Read the rest