Operational control rules determine how pumps and flow regulating structures (i.e., orifice and weir) in the conveyance system will be adjusted over the course of a simulation. InfoSWMM H2OMap SWMM InfoSWMM SA has the following three control classes.
· Initial Status … Read the rest
Special Queries for Domain and Facility in InfoSWMM and InfoSWMM SA
Special Queries are part of the Domain and Facility Managers
Special Query – Include all network components that meet the criteria of one of the special predefined queries. Examples of special queries are all orphan nodes etc
Special Queries … Read the rest
The Attribute Browser has the following buttons/tools. The tools change depending on the type of Element.
Each one of these buttons is briefly described below:
| Button | Name | Description |
 |
Select Element / Select Elements / Select Domain |
|
The Junction inlet data table stores information regarding the inlet at the junction node. Refer to the section on inflow editor for more information on these input data. The following table shows the whole first row of the DB Table on separate rows … Read the rest
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
Example 8. Combined Sewer Systems in InfoSWMM and InfoSWMM SA
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
Example 4. Low Impact Development in InfoSWMM and InfoSWMM SA
This example demonstrates how to model two Low Impact Development (LID) control alternatives, filter strips and infiltration trenches. The detention pond modeled in Example 3 is an example of a subdivision-scale drainage control structure. The LIDs in this example are … Read the rest
Example 3. Detention Pond Design in InfoSWMM and InfoSWMM SA
This example illustrates how to define, design, and evaluate a detention pond using InfoSWMM H2OMap SWMM InfoSWMM SA. Storage units, orifices and weirs will be used to model a multi-purpose detention pond built to detain a water quality capture volume … Read the rest
Example 5. Runoff Water Quality in InfoSWMM and InfoSWMM SA
This example demonstrates how to simulate pollutant buildup and washoff in an urban catchment. The influence of different land uses on pollutant buildup is considered and both Event Mean Concentrations (EMCs) and exponential functions are used to represent the washoff … Read the rest
InfoSWMM H2OMap SWMM InfoSWMM SA offers 12 choices for modeling surface runoff (click on link to see more information on each method):
San Diego Modified Rational Formula in InfoSWMM and InfoSWMM SA
The Rational method is a widely used technique for estimation of peak flows from urban and rural drainage basins (Maidment 1993; Mays 2001). Mathematically, the Rational formula is expressed as:
where Q = peak runoff rate (flow unit)
C = … Read the rest
Example 1. Post-Development Runoff in InfoSWMM and InfoSWMM SA
This first example demonstrates how to construct a hydrologic model of an urban catchment and use it to compare stormwater runoff under both pre- and post-development conditions. It illustrates the process of spatially dividing a catchment into smaller computational units, called … Read the rest
Example 6. Runoff Treatment in InfoSWMM and InfoSWMM SA
This example illustrates how to model water quality treatment in the BMPs that were used in two earlier examples to control runoff from a new residential development on a 29 acre site. Treatment of total suspended solids (TSS) is applied at … Read the rest
Example 2. Surface Drainage Hydraulics in InfoSWMM and InfoSWMM SA
Example 1 showed how to construct a hydrologic model of an urban catchment that compared stormwater runoff under both pre- and post-development conditions. Hydraulic routing was not considered. This example will demonstrate how InfoSWMM’s hydraulic elements and flow routing methods … Read the rest
This example shows how to run a continuous simulation with InfoSWMM H2OMap SWMM InfoSWMM SA using a long-term rainfall record. It will analyze the performance of the drainage system and BMP detention pond for the 29 acre residential site designed in … Read the rest
Excerpt from the EPA manual Storm Water Management Model Reference Manual Volume III – Water Quality (PDF) which can be found here
Management of stormwater quality is usually performed through a combination of so-called “best management … Read the rest
Example 7. Dual Drainage Systems in InfoSWMM and InfoSWMM SA
The post-development model in Example 2 simulated simple hydraulic routing within a surface drainage system that employed open channels in the form of gutters and swales. The three hydraulic routing methods (Steady Flow, Kinematic Wave and Dynamic Wave) were introduced … Read the rest
Example 10. LID Controls in InfoSWMM and InfoSWMM SA
This example demonstrates how to model two Low Impact Development (LID) control alternatives, filter strips and infiltration trenches. The detention pond modeled in Example 3 is an example of a subdivision-scale drainage control structure. The LIDs in this example are hydrologic … Read the rest
Runoff Coefficient in InfoSewer and InfoSWMM
Runoff coefficient is loosely defined as the ratio of runoff to rainfall, and is a function of watershed characteristics including land use, soil type, and slope of the watershed. The value of runoff coefficient ranges between 0.0 and 1.0. A value of 0.0 means … Read the rest
How to Make Scatter Graphs in InfoSWMM, InfoSWMM SA and H2OMap SWMM
Scatter graphs of velocity on the X axis and depth on the Y axis are important to help understand the reason for flow/depth relationships in flow surveys. You can make a scatter graph … Read the rest