Category: LID

Low Impact Developmemt

Treatment in BMP’s and LID’s for SWMM5

Treatment in BMP's and LID's

5.1 Treatment

Excerpt from the EPA manual Storm Water Management Model Reference Manual Volume III – Water Quality (PDF) which can be found here

5.1.1 Background

Management of stormwater quality is usually performed through a combination of so-called “best management practices” (BMPs) and a form … Read the rest

Refactoring the SWMM 5 Help File – LID’s In SWMM5

LID’s in SWMM5

LID Control Editor

The LID Control Editor is used to define a low impact development control that can be deployed throughout a study area to store, infiltrate, and evaporate Subcatchment runoff. The design of the control is made on a per-unit-area basis so that it can be … Read the rest

LID Results – Summary Report for InfoSWMM and SWMM5

LID Results - Summary Report

The performance of the LID controls placed in a Subcatchment is reflected in the overall runoff, infiltration, and evaporation rates computed for the Subcatchment as normally reported by SWMM5. The SWMM's Output Modeling Report also contains a section entitled LID Performance Summary that provides an … Read the rest

Treatment in BMP’s and LID’s for InfoSWMM and SWMM5

Treatment in BMP's and LID's

5.1 Treatment

Excerpt from the EPA manual Storm Water Management Model Reference Manual Volume III – Water Quality (PDF) which can be found here

5.1.1 Background

Management of stormwater quality is usually performed through a combination of so-called “best management practices” (BMPs) and a form … Read the rest

#SuDS in InfoWorks ICM

#SuDS in InfoWorks ICM

In InfoWorks ICM 6.5 and later the SWMM 5 LID Controls were added to the Subcatchment Grid of ICM. Here is a copy of the ICM Help File. The LID Controls are entered in the Subcatchment Grid (1), in the SuDS or LID Tab (2), it … Read the rest

#SWMM5 Bio-Retention Cell LID Reference Values

Bio-Retention Cell LID Reference Values

Excerpt from the EPA manual Storm Water Management Model Reference Manual Volume III – Water Quality (PDF) which can be found here

6.5 Parameter Estimates

The variety of LID controls modeled by SWMM introduces a significant number of design variables and parameters that must be … Read the rest

What are the Options for LID Inflow and Outflow In SWMM 5?

What are the Options for LID Inflow and Outflow in SWMM 5?

The Runoff Surfaces in SWMM 5 are:

1. Pervious area with either Green Ampt, Horton or CN Infiltration

2. Impervious area without Depression Storage or Initial Losses

3. Impervious area with Depression Storage or Initial Losses

Outflow Options Read the rest

Underdrains for LIDs, SuDs or WSuDs in #SWMM5

The reason for this blog: The following is an excerpt from the EPA manual Storm Water Management Model Reference Manual Volume III – Water Quality (PDF) which can be found here

Underdrains are used in the following LID Controls

6.5.1 Underdrains

Underdrains are either recommended or required when the natural … Read the rest

Simple SI Unit Model for SWMM5 LID with 100 mm Rainfall – Part 2

This blog is a companion to the blog post https://swmm5.org/2017/04/17/swmm5-simple-100-mm-rainfall-model-for-lid-modeling-part-1/ in which a 1 Hectare model with 100 mm of rainfall had a simple Bio-Retention Cell with no LID outflows. In part 2 of this blog series we will add a drain coefficient of 10 mm/hr (Figure 1). The internal … Read the rest

#SWMM5 Simple 100 mm Rainfall model for #LID modeling – Part 1

Simple SI Unit Model for SWMM5 LID with 100 mm Rainfall.

Reading this blog and using the embedded SWMM 5 example file, you will run a simple SI unit model based on factors of 1 and 10.

The LID (Bio-Retention Cell) is designed to have zero outflows, Figure 1,

Read the rest
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