--- title: Benchmark of Result Between Stormwater Module in MiTS 3 and EPA SWMM description: "To get a matching result between the Stormwater module in MiTS 3 and EPA SWMM, the project's design must be similar. In this benchmark, we are designing a detention pond. Several conditions must be met for the results to match:…" url: "https://mes100.com/docs/benchmark-of-result-between-stormwater-module-in-mits-3-and-epa-swmm/" updated: "2025-07-02" category: Benchmark / Stormwater --- # Benchmark of Result Between Stormwater Module in MiTS 3 and EPA SWMM To get a matching result between the Stormwater module in MiTS 3 and EPA SWMM, the project's design must be similar. In this benchmark, we are designing a detention pond. Several conditions must be met for the results to match: 1. We must design, analyze and save the detention pond in the Stormwater module first, then export it to the EPA SWMM file 1. Verify that both software have similar default values for analysis [routing method, routing steps, flow unit] 1. In the Stormwater module, make sure to analyze as ***'Analysis'***, not as 'Design' ## Checking default values for Stormwater and EPA SWMM How to check/adjust the value used in each software. Refer to the table below; | **Default** | **StormWater** | **EPA SWMM** | | --- | --- | --- | | **Flow unit****[**LFS**]** | *Input > Inflow Source (Tabular Flow) > Node Inflow > Tabular* | *Ribbon tab > Project > Defaults… > Nodes/Links > Flow Units* | | **Routing method****[**KINWAVE**]** | *Input > Project > Analyse > Flow Routing Method* | *Ribbon tab > Project > Defaults… > Nodes/Links > Routing Method* | | **Routing steps****[**60s**]** | *Input > Project > Analyse > Routing Steps* | *LHS Panel > Project > Options > Time Steps > Routing Step* | ## Example Stormwater module **[Project File](https://largefilehosting.s3.ap-northeast-1.amazonaws.com/ProjectSharing/Client%20Project%20-%20Saiful/12613%20-%20MiTS%203%20vs%20EPA%20%28MiTS%203%29.zip)** EPA SWMM **[Project File](https://largefilehosting.s3.ap-northeast-1.amazonaws.com/ProjectSharing/Client%20Project%20-%20Saiful/12613%20-%20MiTS%203%20vs%20EPA%20%28EPA%29.zip)** ### Design | **Stormwater Module** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/1-8.png?w=1080&ssl=1) | | --- | | **EPA SWMM** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/2-5.png?w=1080&ssl=1) | ### Inflow Hydrograph 2 Years ARI | **Stormwater Module** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/3-3.png?w=1080&ssl=1) | | --- | | **EPA SWMM** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/4-3.png?w=1080&ssl=1) | 50 Years ARI | **Stormwater Module** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/5-3.png?w=1080&ssl=1) | | --- | | **EPA SWMM** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/6-2.png?w=1080&ssl=1) | 100 Years ARI | **Stormwater Module** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/7-1.png?w=1080&ssl=1) | | --- | | **EPA SWMM** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/8-1.png?w=1080&ssl=1) | The inflow hydrograph between the Stormwater module and EPA SWMM is similar to each other. This is because we are using the same hydrograph data. ### Storage Time Series 2 Years ARI | **Stormwater Module** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/9-2.png?w=1080&ssl=1) | | --- | | **EPA SWMM** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/10-2.png?w=1080&ssl=1) | 50 Years ARI | **Stormwater Module** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/11-1.png?w=1080&ssl=1) | | --- | | **EPA SWMM** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/12-1.png?w=1080&ssl=1) | 100 Years ARI | **Stormwater Module** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/13-1.png?w=1080&ssl=1) | | --- | | **EPA SWMM** ![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/09/14-1.png?w=1080&ssl=1) | The inflow hydrograph and outflow hydrograph from both Stormwater module and EPA SWMM are similar. However, there is one graph that is different in value but has a similar shape which is depth/storage over time. This is because the two calculate different measurements. The Stormwater module calculates the depth of the pond which is in length (m) while EPA SWMM calculates the storage of the system which is in volume (m^3) ### Drain and Node Summary Result | **Design ARI** | **Results** | | | --- | --- | --- | | **StormWater module** | **EPA SWMM** | | | **2 Years** |                                                                                     | Node Mark     | Max Depth, m     | | --- | --- | | 1     | 32      | | 2     | 4      | | 3     | 0     | | 4     | 0     | | 5     | 0     |                                                                                     | Node Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0     | | 2     | 9464.999     | | 3     | 821.443     | | 4     | 813.791     | | 5     | 1700.000     |                                                                       | Drain Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0.000     | | 2     | 821.443     | | 3     | 813.791     | | 4     | 1700.000     | |                                                                                     | Node Mark     | Max Depth, m     | | --- | --- | | 1     | 32      | | 2     | 4      | | 3     | 0     | | 4     | 0     | | 5     | 0     |                                                                                     | Node Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0     | | 2     | 9465.00     | | 3     | 821.44     | | 4     | 813.79     | | 5     | 1700.00     |                                                                       | Drain Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0.00     | | 2     | 821.44     | | 3     | 813.79     | | 4     | 1700.00     | | | Node Mark     | Max Depth, m     | | | 1     | 32      | | | 2     | 4      | | | 3     | 0     | | | 4     | 0     | | | 5     | 0     | | | Node Mark     | Max Flow, m^3/s     | | | 1     | 0     | | | 2     | 9464.999     | | | 3     | 821.443     | | | 4     | 813.791     | | | 5     | 1700.000     | | | Drain Mark     | Max Flow, m^3/s     | | | 1     | 0.000     | | | 2     | 821.443     | | | 3     | 813.791     | | | 4     | 1700.000     | | | Node Mark     | Max Depth, m     | | | 1     | 32      | | | 2     | 4      | | | 3     | 0     | | | 4     | 0     | | | 5     | 0     | | | Node Mark     | Max Flow, m^3/s     | | | 1     | 0     | | | 2     | 9465.00     | | | 3     | 821.44     | | | 4     | 813.79     | | | 5     | 1700.00     | | | Drain Mark     | Max Flow, m^3/s     | | | 1     | 0.00     | | | 2     | 821.44     | | | 3     | 813.79     | | | 4     | 1700.00     | | | **50 Years** |                                                                                     | Node Mark     | Max Depth, m     | | --- | --- | | 1     | 32      | | 2     | 4      | | 3     | 0     | | 4     | 0     | | 5     | 0     |                                                                                     | Node Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0     | | 2     | 17639.998     | | 3     | 821.443     | | 4     | 813.791     | | 5     | 1700.000     |                                                                       | Drain Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0.000     | | 2     | 821.443     | | 3     | 813.791     | | 4     | 1700.000     | |                                                                                     | Node Mark     | Max Depth, m     | | --- | --- | | 1     | 32      | | 2     | 4      | | 3     | 0     | | 4     | 0     | | 5     | 0     |                                                                                     | Node Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0     | | 2     | 17640.00     | | 3     | 821.44     | | 4     | 813.79     | | 5     | 1700.00     |                                                                       | Drain Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0.000     | | 2     | 821.443     | | 3     | 813.791     | | 4     | 1700.000     | | | Node Mark     | Max Depth, m     | | | 1     | 32      | | | 2     | 4      | | | 3     | 0     | | | 4     | 0     | | | 5     | 0     | | | Node Mark     | Max Flow, m^3/s     | | | 1     | 0     | | | 2     | 17639.998     | | | 3     | 821.443     | | | 4     | 813.791     | | | 5     | 1700.000     | | | Drain Mark     | Max Flow, m^3/s     | | | 1     | 0.000     | | | 2     | 821.443     | | | 3     | 813.791     | | | 4     | 1700.000     | | | Node Mark     | Max Depth, m     | | | 1     | 32      | | | 2     | 4      | | | 3     | 0     | | | 4     | 0     | | | 5     | 0     | | | Node Mark     | Max Flow, m^3/s     | | | 1     | 0     | | | 2     | 17640.00     | | | 3     | 821.44     | | | 4     | 813.79     | | | 5     | 1700.00     | | | Drain Mark     | Max Flow, m^3/s     | | | 1     | 0.000     | | | 2     | 821.443     | | | 3     | 813.791     | | | 4     | 1700.000     | | | **100 Years** |                                                                                     | Node Mark     | Max Depth, m     | | --- | --- | | 1     | 32      | | 2     | 4      | | 3     | 0     | | 4     | 0     | | 5     | 0     |                                                                                     | Node Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0     | | 2     | 19914.998     | | 3     | 821.443     | | 4     | 813.791     | | 5     | 1700.000     |                                                                       | Drain Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0.000     | | 2     | 821.443     | | 3     | 813.791     | | 4     | 1700.000     | |                                                                                     | Node Mark     | Max Depth, m     | | --- | --- | | 1     | 32      | | 2     | 4      | | 3     | 0     | | 4     | 0     | | 5     | 0     |                                                                                     | Node Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0     | | 2     | 19915.00     | | 3     | 821.44     | | 4     | 813.79     | | 5     | 1700.00     |                                                                       | Drain Mark     | Max Flow, m^3/s     | | --- | --- | | 1     | 0.000     | | 2     | 821.443     | | 3     | 813.791     | | 4     | 1700.000     | | | Node Mark     | Max Depth, m     | | | 1     | 32      | | | 2     | 4      | | | 3     | 0     | | | 4     | 0     | | | 5     | 0     | | | Node Mark     | Max Flow, m^3/s     | | | 1     | 0     | | | 2     | 19914.998     | | | 3     | 821.443     | | | 4     | 813.791     | | | 5     | 1700.000     | | | Drain Mark     | Max Flow, m^3/s     | | | 1     | 0.000     | | | 2     | 821.443     | | | 3     | 813.791     | | | 4     | 1700.000     | | | Node Mark     | Max Depth, m     | | | 1     | 32      | | | 2     | 4      | | | 3     | 0     | | | 4     | 0     | | | 5     | 0     | | | Node Mark     | Max Flow, m^3/s     | | | 1     | 0     | | | 2     | 19915.00     | | | 3     | 821.44     | | | 4     | 813.79     | | | 5     | 1700.00     | | | Drain Mark     | Max Flow, m^3/s     | | | 1     | 0.000     | | | 2     | 821.443     | | | 3     | 813.791     | | | 4     | 1700.000     | | ## Conclusion In conclusion, the results obtained from both software are similar. Both Stormwater module and EPA SWMM have the same value of maximum depth in nodes and maximum flow in nodes and drains. This provides us with assurance that our Stormwater module produces accurate outcomes. ### *Related* [![](https://i0.wp.com/mes100.com/wp-content/uploads/2024/10/me-small.jpg?resize=100%2C100&ssl=1)](https://mes100.com/author/admin/)[Ngu Soon Hui](https://mes100.com/author/admin/) I’m the [Benevolent Dictator for Life](https://en.wikipedia.org/wiki/Benevolent_dictator_for_life) for MiTS Software cum Editor of this website. Read more [here](/about-ngu-soon-hui/). You can also contact me at soonhui@mes100.com