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download sewergems manual pdfPRODUCT DATA SHEET
Urban Sanitary and Combined Sewer Modeling
From urban sewer planning to overflow remediation analysis
to optimized best management practices designs, SewerGEMS
provides an easy-to-use environment for engineers to analyze,
design, and operate sanitary or combined conveyance sewer
systems, using built-in hydraulic and hydrology tools, and a
variety of wet-weather calibration methods.
With SewerGEMS, utilities and consultants can choose to model from within four platforms, while accessing a single, shared, project data source. These platforms include:
• Windows stand alone for ease of use, accessibility, and performance
• ArcGIS for GIS integration, thematic mapping, and publishing
• MicroStation for bridging geospatial planning and engineering design environments
• AutoCAD for convenient CAD layout and drafting
Modeling teams can leverage the skills of engineers from different departments,
and engineers can flatten learning curves by choosing the environment they already
know and provide results that can be visualized on multiple platforms.
Streamlined Model Building
Engineers can leverage geospatial data, CAD drawings, SCADA data, databases, and
spreadsheets to jumpstart the model building process. SewerGEMS provides synchronized database connections, geospatial links, and advanced model-building modules
that connect with virtually any digital data format. SewerGEMS also provides drawing
and connectivity review tools to guarantee a hydraulically coherent model.
Wastewater and Stormwater Loading Allocation and Estimation
The included LoadBuilder module helps modelers allocate sewer loads based on a
variety of GIS-based sources such as customer water use billing data, area-wide
flow measurement, or polygons with known population or land use. Sewer loading
can also be applied as user-defined hydrographs, pattern-based loads, and unit
loads. Engineers can access and customize the comprehensive unit (dry weather)
load engineering library with numerous typical unit loads based on population, area,
count, and discharge.
SewerGEMS also allows users to input and save an unlimited number of flow
patterns, to accurately model flow changes over the course of a day. Engineers can
also load models with wet weather runoff flows derived from precipitation, using
SewerGEMS built-in rainfall distributions, or user-defined rainfall events.
Runoff flows are modeled and calibrated using a choice of hydrograph methods,
including RTK, SCS, Modified Rational, EPA-SWMM, or user-defined generic
Easy Model Management with Scenarios
With SewerGEMS scenario management center, users can configure, evaluate,
visualize, and compare an unlimited number of scenarios within a single file.
SewerGEMS can be used from within MicroStation, AutoCAD, ArcGIS, or as a
Engineers can evaluate design, operational, sanitary loading, and network topology
strategies for better decision-making support.
SewerGEMS can model the effect that low impact development controls have in
retaining runoff before it enters the sewer system. With SewerGEMS, users can also
model hydrogen sulfide formation, with a view to decreasing the risk of pipe damage
from H2S formation, preventing odor complaints, and improving workers’ safety.
Modelers can easily switch among multiple solvers, according to the type of system
they are analyzing:
• To solve the Saint Venant equations, users can choose between SewerGEMS’
explicit EPA SWMM solver and the implicit dynamic wave engine. These two
dynamic engines account for storage effects within structures and quantify
overflows should they occur.
• The convex/gradually varied flow solver uses convex routing to determine gravity
sewer flows and gradually varied flow (backwater analysis) to determine hydraulic
properties once the flow is known. Pressurized flows and pumping calculations
are especially stable when using this solver option. Use steady-state analysis for
extreme flow conditions and to automatically design sanitary sewers, or extended
period simulations to analyze how the sanitary sewer system behaves over time.
• With the rational/gradually varied flow solver, peak flows in the storm sewer
system are calculated using the rational method. Use this solver to analyze peak
flow conditions, or to automatically design storm sewers.
For more information about the solvers supported by SewerGEMS, download
What Is the Right Way to Analyze Collection System Hydraulics?
6/20/2014 3:39:34 PM
Refer to the ‘Installation Requirements’
section of the SewerGEMS
Interface and Graphical Editing
SewerGEMS runs without platform
restrictions as a stand-alone
It also runs from within ArcGIS,
AutoCAD, and MicroStation. The
requirements are also available in
SewerGEMS’ ReadMe file.
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• Stand-alone Windows interface included
• Ability to run within ArcGIS (ArcMap license required)
• Ability to run within MicroStation (MicroStation
• Ability to run within AutoCAD (AutoCAD license required)
• Unlimited undo/redo of layout and editing
• Element morphing, splitting, and reconnection