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For more details about the locations of the nodes and links, please refer to the solution model. The figure below highlights the major links in red. A conduit will be created automatically by holding Ctrl key.įollowing the same procedure to add nodes and links for the major system of the west and the north branches. A conduit will be created automatically.įollowing the same way to add the third major node on the sag area entrance, which also has two manholes nearby. Hold Ctrl key and place the second node on the main stream of the flow path and close to the catch basin. Move the map to down stream by holding and dragging the mouse middle wheel. Left click the mouse to place the first node on the main stream of the flow path and close to the manhole. The snapped Vertex is shown in a red box. When the mouse cursor changes to the Edit mode, hover the mouse cursor to snap on the flow path. Drag and drop the Junction icon from the Tool Box to the Map canvas. Zoom into the upstream location, which is on the right bottom of the map, of the south branch. In the pop-up window, navigate to the Nodes / Links tab and set the parameters as below. Click the Default Values button in the Simulation tab. To add a major system, first change the default parameter of node and link. In this tutorial case, the overland flow path can be seen as three branches along with the minor system: the east branch, the south branch, and the north branch.
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* Please note that it is modeler’s responsibility to decide where and how to create overland system. when there is a change in roughness of the road / ground.when there is a change in cross sections.at a junction point when two flow paths meet.when there is a sewer manhole and at the curb of the road transect across the manhole.when there is a catch basin / inlet along the flow path.Regarding the locations of overland nodes, it is recommended to add overland nodes: It is recommended to make overland conduits match with flow path direction.It is recommended to place overland nodes on the flow path.There are several rules recommended that users can follow when adding overland nodes and conduits. * “Overland System” is also called as “Major System”, while “Minor System” means “Sewer System”. In that way, the flow rate and depth can be obtained. The hydraulics of those nodes and conduits are modelled by SWMM5 engine. In VOSWMM, the overland flow is modelled by creating node and conduit on the ground. Step 11: Developed Site – Model Results.Step 10: Developed Site – Run Simulation.Step 8: Undeveloped Site – Model Results.Step 7: Undeveloped Site – Set up Analysis Option and Run Simulation.Step 5: Undeveloped Site – Assign Object Properties.
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Step 4: Undeveloped Site – Add Objects to Schematic View.Step 3: Undeveloped Site – Add Background Image.Step 3: Assign Manhole Inflow Rating Curve.Step 2: Set Up Properties for Manhole II Modeling.Step 1: Open a Saved Project and Set Up Project.Modeling and Analysis of Manhole Inflow & Infiltration Using Dual-Drainage Method.Step 26: Save Project and Export INP File.Step 24: Run Surcharge Analysis and Flood Plain Analysis.Step 19: Generate and Import Capture Curve.Step 16: Adjust Properties of Overland Objects.Step 14: Add and Connect Storage Unit at Sag Area.Step 13: Add Overland Nodes and Conduits.Step 12: View and Adjust Layer Properties on the Map.Step 6: Add Storm Data to Resource Library.Step 2: Create a New VOSWMM Project and Change the Scenario Settings.Step 14: View Simulation Detail Results.Step 13: View Simulation Summary Results.Step 12: Set Run Options and Run the Simulation.Manhole Inflow and Infiltration Modeling.