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Sanitary Sewer Modeling Features Printable format (PDF)     

Know
Your
Flows!
What wastewater flows go into the sewer system? Having a good method for calculating sanitary flows entering the sewer is a critical part of creating and maintaining a realistic model. Yet it is all too often treated as an afterthought. The powerful flow generation features in Hydra® software make it easy for you to input, generate, and manage the flows for current and alternative scenarios.

Sanitary Flows on Any Layer
Hydra® software gives you unmatched flexibility for organizing your flow data. You decide which layers to use, what to call them, and how to organize your flow injections. Any graphical layer in the model (including the collection system layer) can inclulde flow injections of any type (sanitary, infiltration, stormwater, and inflow) in any combination. Layers can link directly to the collection system, or intersect with other layers to create derivate flows.

Any Number of Land Use Types
Each pipe, point, or polygon may have any number sanitary injection sets to represent different types of land uses. Each injection set uses its own diurnal curve (flow pattern over time) to represent the sanitary flow characteristic of the land use. You can create a separate sanitary injection set for office, retail, industrial, hotel, schools, single-family, multi-family, etc.

Flexible Data Fields
For each injection set, you can input data by population, units, area, flow volume, or flow rate. For example, to represent apartment buildings in an area, you might choose to organize it this way: 75 apartment units, averaging 2 people per apartment unit, with each person using 65 gallons per day. Hydra will combine this data to calculate a total daily volume. Organizing the data in this way, itís easy to update the flows as your data changes, for example when the contribution per capita changes after a water conservation effort, or as population projections change.


Diurnal Curve

Sanitary Flow Layers

Sanitary Flows

Scenario-Oriented Project Organization
From the start of your project you can establish analysis scenarios for your modeling project. For example, Current Land Use, Projected Land Use, or Water Conservation Alternate A. Select specific layers and individual flow injections to include in each scenario, along with other analysis criteria. As input data is updated, just click the Analyze button to re-run hydraulic analyses for your pre-established scenarios. Try out any number of alternate designs for collection system improvements, and infiltration scenarios for different rain events. Create new scenarios quickly by copying existing scenarios and making necessary modifications.

Peaking Factor Method Supported
Hydra® software supports the traditional Peaking Factor Method, which is specified as the preferred method by many government agencies. If your project requires the use of the Peaking Factor Method, Hydra® software is the model to use!

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