Examples
Example 1: Post-Development Runoff
Surface runoff from a 29-acre residential site is computed for several design-storm events under both pre- and post-development conditions.
Example 2: Surface Drainage Hydraulics
A surface runoff conveyance network is added to the post-development catchment area of Example 1 and is analyzed with GeoSWMM’s various hydraulic routing options.
Example 3: Detention Pond Design
A detention pond and outlet structure are designed for the post-development condition of Example 2 to meet both water quality control and peak flow reduction criteria.
Example 4: Low Impact Development
Two typical Low Impact Development (LID) controls, filter strips and infiltration trenches, are placed within the post-development catchment modeled in Example 2.
Example 5: Runoff Water Quality
The buildup, wash-off, and routing of total suspended solids (TSS) are simulated within the post-development catchment modeled in Example 2.
Example 6: Runoff Treatment
The removal of TSS in the LID controls and detention pond of Examples 3 and 4 is modeled.
Example 7: Dual Drainage Systems
Example 2's surface drainage system is converted into a dual drainage system of below ground storm sewers and above ground streets and gutters subjected to surcharged flow and street flooding.
Example 8: Combined Sewer Systems
The sewer system of Example 7 is converted into a combined system that carries both dry weather sanitary flow and wet weather runoff, including/incorporating various flow diversion structures and a pumped-force main.
Example 9: Continuous Simulation
GeoSWMM’s post-processing tools are used to analyze the performance of the detention pond designed in Example 3 over a continuous ten-year period of historical rainfall.
Example 10: Urban Flooding – 2D Model Simulation
This example utilizes the GeoSWMM 2D model to explore flood extents in urban watersheds, providing a detailed analysis of surface water flow during large storm events.