ModelTracker
Record keeping and tracking the changes made to a model during the model building, calibration, analysis and design phases could be a nightmare if not supported by an efficient tool. The ModelTracker simplifies these tasks for H₂OMAP SWMM users. ModelTracker tools enable users to create, store, retrieve and manage model related supplemental information to show the evolution of the model throughout the project life-cycle.  The advanced query and search capability offered by Model Tracker allows users to easily locate the desired historical information and verify changes and additions. The Model Notes Editor, a component of Model Tracker, facilitates annotating model changes using a rich text editing interface which provides user-friendly tools to capture all the desired information and highlight important information.

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Source Tracing
Source tracing tracks over time what percent of sewage reaching any pipe or manhole in the network had its origin at a particular source node. The source node can be any manhole in the network, including wet-wells. Source tracing is very useful in sewer collection systems, and could be used for (1) tracking changes in sewage flow contribution (and associated constituents) over space and time; (2) predicting impact of industrial and commercial waste discharges on performance of wastewater treatment plants; (3) determining contaminant level that causes a wastewater treatment plant to be in violation of its discharge permits; (4) and developing appropriate user charges based on wasteloads and level of contaminant.

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Tools to Improve Long-term Simulation Efficiency
H₂OMAP SWMM simulations greater that 50-years in duration are possible, and in some cases they are required to meet EPA’s regulatory demands.  The wet-weather flow analysis integrates hydrologic simulation to generate runoff with hydraulic routing to convey the flow through the collection system. Dynamic wave routing is usually required for wet-weather analysis because it is robust and yields sound results in most cases, but it is computationally demanding especially for long-term simulations. Within the simulation duration there may be periods of no rain (i.e., dry periods) when there is little change in flow patterns. During these dry periods, there may be insignificant changes in flow from one time step to another time step due to pumping operations and dry-weather flows. The model can skip these periods—moving forward in time to the next rainfall event. Several options have been implemented in H₂OMAP SWMM to improve efficiency of long-term simulations while maintaining an accurate solution.

Flow Source Control
H₂OMAP SWMM offers the option to ignore one or more inflow sources such as DWF, external inflow, RDII and surface runoff from the analysis. For example, if the main interest is to conduct rainfall-runoff simulation, other inflow sources such as dry weather flow, external inflow, or RDII flow may be ignored during the analysis. This feature has two basic benefits. 1) One may develop different model scenarios each simulating the effect of one or more inflow sources on the system. This will help to quantify the relative contribution of various inflow sources to a point of interest such as wastewater treatment plants. 2) Fluctuations in lateral inflow exhibited during dry periods may be avoided thus improving computational efficiency of long-term rainfall-runoff simulation.

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Flexible (Selective) Output Data Generation
The output data generated by H₂OMAP SWMM may be voluminous for long-duration simulations. In most cases, the user may need only a small portion of this total output. The flexible output generation option allows the modeler to get results only for selective nodes and links--significantly decreasing the output data size without compromising the modeler’s need.

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Support Colorado Urban Hydrograph Procedure, NRCS Dimensionless Unit Hydrograph, and NRCS Triangular Unit Hydrograph Subcatchment Rainfall Runoff Models
Supports rainfall-runoff modeling using Colorado Urban Hydrograph Procedure (CUHP), NRCS dimensionless unit hydrograph method, and NRCS triangular unit hydrograph approach as an alternative to EPA SWMM's non-linear reservoir method.

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Combine Interface Files
Combines two routing interface files of any level of complexity. (i.e., different time step, different time span, different flow and water quality variables, different number of output nodes, etc.)

Support Sub-Model Cut Off and Sub-Model Merger
Allow selected facilities to be exported as a stand along EPA-SWMM5 model. Allow importing several EPA-SWMM5 models into one H₂OMAP SWMM project (extended EPA-SWMM5 files will be supported).

H₂OMAP Sewer Import
Imports H₂OMAP Sewer models with a mouse click.

Node water level status - for Report, Attribute Browser, and Map Display
Reports status of water level for a node with reference to invert and crown elevations of conduits leaving the node, and the maximum depth of the node for easy review of the node's flooding potential.

Node water level will be flagged thus providing essential information on flooding status of nodes. The reported water level status will be one of the following four depending on depth of water in the node.

• Below Link Invert
  when water level is below the invert elevation of the leaving conduit. If multiple conduits are leaving the node, we are planning to use the minimum of the invert elevations of the leaving conduits.
  
• Below Link Crown
  If water level is below the crown elevation of the leaving conduit but above the invert elevation of the conduits. If multiple conduits are leaving the node, we are planning to use the maximum of the crown elevations of the leaving conduits.
  
• Below Maximum Depth
  If water level is below the maximum depth of the node, but above the crown elevation of the leaving conduits.
  
• Surcharged
  If water level exceeds the maximum depth of the node, whether ponding is allowed or not.

Enhanced HGL report and graph
Enhanced HGL profile that allows zooming in to specific nodes and conduits to closely review modeling results, that displays measured node head along with calculated head thus assisting during calibration efforts, and that allows saving of HGL profiles to selection sets for quick retrieval.

Displaying measured node head along with calculated head on HGL plot
If measured node depth is available for the nodes included in a profile plot, the graph will display both calculated and measured heads. If more than one node has measured depths, an interpolated line will be used to connect the nodes.

Calibration file reports
Generates calibration reports and graphs that compare measured data with simulated data, a very helpful tool for model calibration.

Five additional report types will be supported. The reports will display measured and calculated values for the available calibration file types (i.e., subcatchment runoff, subcatchment runoff quality or washoff, node depth, link flow, and node quality).

Monthly or/and annual summary (total flow, average concentration, etc.) report/graph

Displaying flooding stage duration curve
These would describe the length of time and associated stage for each storage unit or manhole node. The flooding elevation will need to be incorporated into the Node data tables in order to perform this calculation. In this graph, elevation 610 is the flooding elevation. Note: This feature is going to be available from the statistics module, not from output report manager.

New Raingage Set Support
Supports creation of modeling scenarios based on rainfall data sets (e.g., different design rainfalls).

Extended Special Queries

• Find Contributing Subcatchments
  
• Find Drainage Nodes
  
• Find Node Links (Upstream, Downstream, Both)

Automatic display of calibration data
If available, measured data for subcatchment runoff, node depth, and link flow will be automatically displayed along with calculated output when user creates a graph for a subcatchment, node, or link, respectively. A global option will be added to preferences page to allow the user to turn off this feature, if s/he wishes.

Adding elements with calibration data to special queries
The special query feature available from domain manager and facility manager will support querying on nodes, subcatchments, or links which have calibration data provided.

Flagging node's "flooding" output with red color on the AB
If the "flooding" output for nodes is greater than zero, its value will be displayed in red to attract attention of the modeler.

Flagging conduit's "Capacity" output with red color on the AB
If the "capacity" (equivalent to d/D) output for conduits is equal to 1.0, its value will be displayed in red to attract attention of the modeler.

Map display based on raingage coverage
Subcatchments will be color-coded based on the RGs assigned to them. The color of the RGs shall be same as color of the subcatchments to which the RG is assigned.

Map Display: allow unique value rendering
Supports color coding based on unique values such as conduit shape, storage shape, subcatchments based on the raingage used as rainfall data source, etc.

Map Display

• Allow the flow direction to be shown (instead of link direction)
• Allow Element ID to be shown together with the value
• Allow the distinct colors to be quickly assigned

Polygon Digitizing: allow pressing"Del" key to revert back to the previous point

Map Selection: Optionally change (subcatchment) polygon (selection) highlighting scheme

Network Review Tools
Including Nodes in Closest Proximity, Conduit-Split Candidates, and
Crossing Conduits. The conduit's 3D location (inverts and slope) can optionally be put into consideration in determining the crossing status (Network Tracing has been provided in H₂OMAP SWMM V1).

Extended EPA-SWMM5 Import/Export
Optional Extended EPA-SWMM5 files can be used to facilitate exchanging in between H₂OMAP SWMM models.

GIS Exchange now supports Pattern, Curve, Time Series, and Output Relate

Allow Text File Exchange for Pattern, Curve, and Time Series Dialog Box
Imports and exports time series, pattern, and curve text files very easily.

Report total flow (overflow) volume through links and nodes
Total volume of flow through links and total inflow volume into junctions, aggregated over the simulation duration, will be added to summary reports (e.g. conduit depth summary, junction flow summary, etc).

Report total flooding volume through junctions
Total volume of flooding flow lost through junctions, aggregated over the simulation duration, will be added to junction flow summary report.