Water Simulation Packages (WSP)

A new release of the DC Water Design Extension is available from:

http://dcwaterdesign.sourceforge.net

The DC Water Design Extension is a free ArcView 3.x extension that integrates EPANET with ArcView.

The changes:

* Bug fixes especially to the start menu links

* Three new functions: Split Model, Merge Model, Extract Model

HAMMER is a free program I used a few years ago to simulate water hammer in a water pipe.

From HAMMER read me file:

HAMMER is a program which simulates the effects of water hammer in a reservoir and pipeline system in which a valve at the downstream end is opened or closed by the user. The program is a product of the Urban Water Systems Group, School of Civil Engineering, Queensland University of Technology.

The program solves the differential equations of transient flow in a simple pipeline with a reservoir at the upstream end and a valve at the downstream end. The aim of the program is to provide a demonstration of the effects of water hammer in a simple pipe, reservoir and valve system. The method of characteristics is used in the solution of the differential equations.

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HAMMER Version 2

I have mentioned the EPANET toolkit several times before but didn’t post any information about it yet. The following info is from the toolkit readme file:

EPANET is a program that analyzes the hydraulic and water quality behavior of water distribution systems. The EPANET Programmer’s Toolkit is a dynamic link library (DLL) of functions that allows developers to customize EPANET’s computational engine for their own specific needs. The functions can be incorporated into 32-bit Windows applications written in C/C++, Delphi Pascal, Visual Basic, or any other language that can call functions within a Windows DLL. The Toolkit DLL file is named EPANET2.DLL and is distributed with EPANET. The Toolkit comes with several different header files, function definition files, and .lib files that simplify the task of interfacing it with C/C++, Delphi, and Visual Basic code.

The freeware FireFlow utility was written using the EPANET toolkit.

For more information and download see EPANET web page.

The US Army Corps of Engineers announced the release of HEC-RAS 3.1.3.

The HEC-RAS modeling system was developed as a part of the Hydrologic Engineering Center’s “Next Generation” (NexGen) of hydrologic engineering software. The NexGen project encompasses several aspects of hydrologic engineering, including: rainfall-runoff analysis; river hydraulics; reservoir system simulation; flood damage analysis; and real-time river forecasting for reservoir operations.

The HEC-RAS system will ultimately contain three one-dimensional hydraulic analysis components for:
(1) steady flow water surface profile computations;
(2) unsteady flow simulation;
(3) movable boundary sediment transport computations.

Currently steady and unsteady flow are available and sediment transport is under development. A key element is that all three components will use a common geometric data representation and common geometric and hydraulic computation routines. In addition to the three hydraulic analysis components, the system contains several hydraulic design features that can be invoked once the basic water surface profiles are computed, including bridge scour computations, uniform flow computations, stable channel design, and sediment transport capacity.

The current version of HEC-RAS supports steady and unsteady flow water surface profile calculations. New features and additional capabilities will be added in future releases.

For more information and download see HEC-RAS web page.

Source: U.S. Environmental Protection Agency

4/27/2005 Cincinnati, OH - Civil and environmental engineers now have an improved software tool, the Storm Water Management Model (SWMM), to help plan, analyze, and design urban storm water drainage and sewer systems. This latest revision to SWMM includes several improvements not available in previous editions. These include a modern graphical user interface, a more intuitive modeling approach, and improved computational speed. SWMM continues to be open source and its numerical engine can easily be integrated into third-party interfaces.

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EPA Releases Improved Storm Water Management Model

From the Perf-Q web site:

Performance-Q – Perf-Q for short – is a water quality model applicable to drinking water transmission and distribution systems. It is based on an event-driven advection and mixing model, and includes the capability to simulate the propagation and transformation of physico-chemical and microbiological parameters throughout water networks.

Perf-Q uses Epanet standard script input files to perform a complete hydraulic and water quality extended-period simulation. It models chlorine (free and combined), suspended bacteria, organic matter and travel time, taking account of such ambient variables as pH, temperature and pipe biofilm load. The event-driven Lagrangean advection and mixing model provides a basis for taking account of all such parameters and variables simultaneously and model their transformation taking into consideration both their inter-relationships and the influence of hydraulic variables such as flow velocity.

For a free download and a manual see Perf-Q web site.

Steffen Macke has announced a new release of the DC Water Design Extension.

The DC Water Design Extension is a FREE Extension to ESRI’s ArcView GIS software. The DC Water Design Extension integrates the EPANET 2.00 hydraulic modeling software with ArcView.

The changes in this version are:

* INP file import is handling virtual lines now. Function robustness has been improved and error messages are displayed in ArcView.

* More robust “Create Missing Junctions” function.

* Updated documentation.

* New installer interface.

* Bug fixes for patterns, help file integration, result import.

The new release is available from the DC Water Design Extension website.

GISRed is a customized extension to ArcView GIS 3.2 oriented to the modeling and calibration of water distribution networks which integrates all the capabilities of the widely used hydraulic modeling software EPANET 2.0.

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GISRed INTEGRATION OF EPANET 2 IN ARCVIEW GIS 3.2

MODFLOW is a three-dimensional finite-difference ground-water model that was first published in 1984. It has a modular structure that allows it to be easily modified to adapt the code for a particular application. Many new capabilities have been added to the original model. OFR 00-92 (complete reference below) documents a general update to MODFLOW, which is called MODFLOW-2000 in order to distinguish it from earlier versions. MODFLOW-2000 simulates steady and nonsteady flow in an irregularly shaped flow system in which aquifer layers can be confined, unconfined, or a combination of confined and unconfined. Flow from external stresses, such as flow to wells, areal recharge, evapotranspiration, flow to drains, and flow through river beds, can be simulated. Hydraulic conductivities or transmissivities for any layer may differ spatially and be anisotropic (restricted to having the principal directions aligned with the grid axes), and the storage coefficient may be heterogeneous. Specified head and specified flux boundaries can be simulated as can a head dependent flux across the model’s outer boundary that allows water to be supplied to a boundary block in the modeled area at a rate proportional to the current head difference between a “source” of water outside the modeled area and the boundary block. MODFLOW is currently the most used numerical model in the U.S. Geological Survey for ground-water flow problems. In addition to simulating ground-water flow, the scope of MODFLOW-2000 has been expanded to incorporate related capabilities such as solute transport and parameter estimation.

MODFLOW is free and can be download from USGS website.

MODFLOW is DOS program. There are numerous WIndows-based Graphical User Interfaces (GUIs) for MODLFOW. You can find a few here.

The DC Water Design Extension is a FREE Extension to ESRI’s ArcView GIS software. The DC Water Design Extension integrates the EPANET 2.00 hydraulic modeling software with ArcView. It allows to store, edit and retrieve EPANET hydraulic models including all options in ArcView. Also it’s possible to run the EPANET hydraulic analysis from ArcView and load the results into the GIS.

The DC Water Design Extension can be obtained from the sourceforge.net website. The sourceforge site offers a multitude of services related to the DC Water Design Extension, including:

• Downloads
• Documentation
• Sources
• Bug Tracker
• Mailing List
• Sample Data

DC Water Design Extension website