Category: Hydrology

Posts about runoff, groundwater, infiltration, RDII etc

Refactoring the SWMM 5 Help File – Climate Data in SWMM5

Climate Data in SWMM5

Climatology

The Climatology object in EPA SWMM describes the following climate-related variables used for computing runoff and snowmelt:

· Temperature
· Evaporation
· Wind Speed
· Snowmelt
· Areal Depletion
· Climate Adjustments
Rain Gages

Rain Gages supply precipitation data for one or more subcatchment areas … Read the rest

Refactoring the SWMM 5 Help File – Groundwater in SWMM5

Groundwater in SWMM5

Aquifers

Aquifers are sub-surface groundwater zones used to model the vertical movement of water infiltrating from the subcatchments that lie above them. They also permit the infiltration of groundwater into the drainage system, or exfiltration of surface water from the drainage system, depending on the hydraulic gradient … Read the rest

Refactoring the SWMM 5 Help File – Hydrology in SWMM5

Hydrology in SWMM5

Hydrologic Modeling Features

SWMM accounts for various hydrologic processes that produce runoff from urban areas. These include:

· time-varying rainfall
· evaporation of standing surface water
· snow accumulation and melting
· rainfall interception from depression storage
· infiltration of rainfall into unsaturated soil layers
· percolation
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Surface Runoff Methods in InfoSWMM and InfoSWMM SA (Standalone)

Surface Runoff Methods in InfoSWMM and InfoSWMM SA (Standalone)

InfoSWMM H2OMap SWMM InfoSWMM SA offers 12 choices for modeling surface runoff (click on link to see more information on each method):

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Stormwater Runoff and the Rational Method in InfoSWMM and InfoSWMM SA

Stormwater Runoff and the Rational Method in InfoSWMM and InfoSWMM SA

For storm sewer loading, the focus shifts to hydrologic analysis of excess precipitation and associated runoff. Common techniques for analysis include the rational method and unit hydrograph methods, as well as the use of more advanced hydrologic models.

For … Read the rest

The Colorado Urban Hydrograph Procedure in InfoSewer

The Colorado Urban Hydrograph Procedure in InfoSewer

The Colorado Urban Hydrograph Procedure (CUHP) uses the equations and procedures presented in the Urban Drainage Criteria Manual (USDCM) of the Urban Drainage and Flood Control District (UDFCD). Shape of the CUHP synthetic unit hydrograph is determined using the following equations that relate … Read the rest

InfoSWMM and InfoSWMM SA offer 13 choices for modeling surface runoff with Connections to Groundwater and #LIIDs

Surface Runoff in InfoSWMM and InfoSWMM SA

InfoSWMM and InfoSWMM SA offer 13 choices for modeling surface runoff (click on link to see more information on each method):

Read the rest

AAEES 2017 Innovyze Excellence in Computational Hydraulics/Hydrology Award Presented to Dr. Qian Zhang

AAEES 2017 Innovyze Excellence in Computational Hydraulics/Hydrology Award Presented to Dr. Qian Zhang

Broomfield, Colorado, USA, May 23, 2017 – Innovyze, a leading global innovator of business analytics software and technologies for smart wet infrastructure, today announced that Dr. Qian Zhang, Research Scientist with the University of Maryland Center for … Read the rest

San Diego Modified Rational Formula in InfoSWMM

San Diego Modified Rational Formula in InfoSWMM

Subject: San Diego Modified Rational Formula

San Diego Modified Rational Formula

The Rational method is a widely used technique for estimation of peak flows from urban and rural drainage basins (Maidment 1993; Mays 2001).

Stormwater modeling applications such as the design of detention … Read the rest

Graphical View of the Runoff process in #SWMM5 and #INFOSWMM

Here is a graphical view of the nonlinear runoff processes in InfoSWMM and SWMM5:

1. Three runoff surfaces

a. Impervious with Depression Storage

b. Pervious

c. Impervious without Depression Storage

2. Slope (same for all runoff surfaces)

3. Width or the Dimension of the Subcatchment (same for all runoff surfaces)… Read the rest

German Hydrology in InfoSWMM 14.5 and H2OMAP SWMM 14.5

German Hydrology in InfoSWMM 14.5 and H2OMAP SWMM 14.5

This blog describes how the German Runoff hydrology converts precipitation excess (rainfall and/or snowmelt less infiltration, evaporation, and initial abstraction) into surface runoff (overland flow). InfoSWMM is a distributed model as it allows a study area to be subdivided into any

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Tutorial 13 How are the Costs Used in the LID Candidate Table for InfoSWMM Sustain?

Tutorial 13 How are the Costs Used in the LID Candidate Table for InfoSWMM Sustain?

There are seven type of costs associated with a LID or SuDS in InfoSWMM Sustain as shown in the following table.

Type of Cost Description of Cost
Linear Cost Cost per linear unit of the
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Tutorial 1 Creating a Simple Green Roof Optimization for InfoSWMM Sustain

Tutorial 1 Creating a Simple Green Roof Optimization for InfoSWMM Sustain

In Tutorial 1 we will use the Siting Manager to Site Green Roof LID Types for later Optimization and Export to the InfoSWMM LID Usage DB Table. Tutorial 1 is designed for first-time users of InfoSWMM Sustain and provides … Read the rest

Example 8. Combined Sewer Systems from EPA SWMM5 Applications w/InfoSWMM

Example 8. Combined Sewer Systems from EPA SWMM5 Applications w/InfoSWMM

This example demonstrates how to model systems that convey both sanitary wastewater and stormwater through the same pipes. Systems like these are known as combined sewer systems and are still quite common in older communities and cities. During periods of … Read the rest

Infiltration Trench LID Control for #LID’s in #SWMM5 and #InfoSWMM

Infiltration Trench LID Control for #LID’s in #SWMM5 and #InfoSWMM

This is an introduction along with images of the LID Control and data require3ments in InfoSWMM. Every InfoSWMM Control uses from one to 5 layers of data – each with different data requirements. You can use the Siting Manger of … Read the rest

Bio-Retention Cell LID Control in #SWMM5 and #InfoSWMM for Sustain

Bio-Retention Cell LID Control in #SWMM5 and #InfoSWMM for Sustain

This is an introduction along with images of the LID Control and data require3ments in InfoSWMM. Every InfoSWMM Control uses from one to 5 layers of data – each with different data requirements. You can use the Siting Manger of … Read the rest

LID Rain Garden Control in #SWMM5 and #InfoSWMM for InfoSWMM Sustain

LID Rain Garden Control in #SWMM5 and #InfoSWMM for InfoSWMM Sustain

This is an introduction along with images of the LID Control and data require3ments in InfoSWMM. Every InfoSWMM Control uses from one to 5 layers of data – each with different data requirements. You can use the Siting Manger … Read the rest

Porous Pavement LID Control in #SWMM5 and #InfoSWMM for Sustain

Porous Pavement LID Control in #SWMM5 and #InfoSWMM for Sustain

This is an introduction along with images of the LID Control and data require3ments in InfoSWMM. Every InfoSWMM Control uses from one to 5 layers of data – each with different data requirements. You can use the Siting Manger of … Read the rest

General LID Features in #SWMM5 and #InfoSWMM

General LID Features in #SWMM5 and #InfoSWMM

The number of LID Controls is unlimited and very flexible. In addition to the 5 main LID controls:

1. Rain Barrel

2. Bio-Retention Cell

3. Infiltration Trench

4. Porous Pavement

5. Vegetative Swale

6. Green Roof

7. Rain Garden

8. Rooftop Disconnection

You … Read the rest

Rooftop Disconnection LID Control in InfoSWMM and #SWMM5 for Sustain

Rooftop Disconnection LID Control in InfoSWMM and #SWMM5 for Sustain

This is an introduction along with images of the LID Control and data require3ments in InfoSWMM. Every InfoSWMM Control uses from one to 5 layers of data – each with different data requirements. You can use the Siting Manger of … Read the rest

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