Hydraulic Capabilities

WaterNAM’s extended period hydraulic analysis capabilities include:

  • Simulation of distribution network of any size
  • Calculation of friction head loss applying the Hazen-Williams, the Darcy Weisbach, or the Chezy-Manning equation
  • Account for minor head losses at bends, fittings, etc.
  • Model constant or variable speed pumps
  • Compute pumping energy and cost
  • Model operational behavior with various types of valves, including shutoff, check, pressure regulating, and flow control
  • Model storage tanks with varying shapes (i.e., surface area can vary with height)
  • Account for multiple demand categories at nodes, each with its own pattern of time variation
  • Model pressure-dependent flow and flow from emitter nodes
  • Allows system regulations such as rule based or logical controls on pump scheduling or tank-operations

 Water Quality Analysis Options

WaterNAM is equipped with a powerful water quality analyzer which can:

  • Model the movement of a non-reactive tracer material through the network over time
  • Model the movement and fate of a reactive material as it grows (e.g., a disinfection by-product) or decays (e.g., chlorine residual) over time
  • Model the age of water throughout a network (water age analysis)
  • Track the percent of flow from a given node reaching all other nodes over time (trace analysis)
  • Model reactions in the bulk flow and at the pipe wall
  • Allow growth or decay reactions to proceed up to a limiting concentration
  • Employ global reaction rate coefficients that can be modified on a pipe-by-pipe basis
  • Allow for time-varying concentration or mass inputs at any location in the network
  • Model storage tanks as being complete mix, plug flow, or two-compartment reactors
  • Project GeodatabaseWaterNAM manages model data in a standard ArcGIS® geodatabase. It allows users to maintain model element (e.g. junctions, pipes, valves) data in individual layers in the geodatabase, while the non-visual information and general project setting options are stored in a set of predefined tables in the project geodatabase. Thus, WaterNAM provides a comprehensive framework for water utility management.
  • Object-tree Panel for Model Data InterfaceWaterNAM runs in ArcGIS® 10.x (ArcMap™ 10.x) platform. It adds a tool bar and a comprehensive tree-structured model interface in ArcMap™. The simulation options, model objects and operational settings are organized in easy-to-use rows in a tree panel, and the panel provides the utmost flexibility in editing model data.
  • Drag-and-Drop Model BuilderThe drag-and-drop model builder in WaterNAM enables users to efficiently create a water distribution model using existing GIS layers of the network components. Since network information are often readily available in GIS format and can be imported from CAD files, the drag-and-drop model builder extracts necessary information directly from the GIS data sources to quickly develop a water distribution model for hydraulic analyses or design.
  • Network Analysis ToolThe Network Analysis Tool in WaterNAM identifies the discontinuities or irregularities in the existing node and link layers of a water distribution model. It enables a user to quickly find the type and extent of data anomalies, view them in comprehensive groups, and correct network errors before running a simulation.
  • Rule Based Control EditorWaterNAM allows users to set logical controls on the operational devices (e.g. pumps, valves) in a straightforward way. The control editor provides options for either a single or a combination of operational conditions under each rule.

Advanced Attribute Editing and Management

WaterNAM introduces some special features to edit and manage project information such as:

  • Viewing and editing of element properties in tables (i.e. grid view)
  • Accessing all editing options and tools of ArcMap™ 10.x (including symbology and styles)
  • Previewing input file for model simulation using the Project Details Report
  • Setting desired numeric precision for the hydraulic parameters
  • Importing curve data from text files or spreadsheets

Model Result Presentation

In WaterNAM the simulation results are presented in a number of ways including:

  • Detailed simulation status report with convergence error
  • Time series output of hydraulic and water quality variables (charts and tables)
  • Time series comparison between two analysis variables (charts)
  • Profile plot of analysis variables along a defined pipe line (elevation view)
  • Reaction summary report (pie-chart)
  • Energy-cost report (table)
  • Result table for the analysis variables

EPANET Compatibility

WaterNAM is fully compatible with EPANET, which is freely available from USEPA. Its wide range of applications and long history make it a very reliable software for analysis and design of water distribution systems. WaterNAM integrates the hydraulic engine of EPANET in ArcMap™ 10.x and it can:

  • Export a WaterNAM project to an EPANET model network file (.inp file)
  • Export a WaterNAM project to an EPANET model scenario file (.scn file)