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HEC-RAS has the ability to import three-dimensional river schematic and cross section data created in a GIS or CADD system.While the HEC RAS software only utilizes two dimensional data during the computations,the 3D information is used in the program for display purposes.After the user has completed a hydraulic analysisi,the computed water surface profiles can be exported back to the GIS or CADD system for development and display of a floodplain map. The importing and exporting of GIS or CADD data is accomplished through the use of formatted ASCII text files,The text files provide a generic way of exchanging data between GIS/CADD systems and HEC -RAS,without adopting any single GIS/CADD system. The HEC has developed a set of macros for Arc Info(using Arc Macro Language,AML) that will allow a user to write the geometric data in the required format as well as read the HEC-RAS results and perform the floodplain mapping. To view more download this chapter Download GIS with HEC RAS ebook...

HEC RAS Working with HEC RAS an overview HEC RAS is an itergrated package of hydraulic analysis programs,in which the user interacts with the system through the use of a Graphical User Interface.The system is capable of Performing Steady Flow Water surface profile calculations and will include unsteady flow,sediment transport and several hydraulic design computations in the future. In HEC-RAS terminolgy, a project is a set of data files associated with a particular river system.The modeler can perform any or all of the various types of analyses,included in the HEC RAS package,as part of the project.The data files for a project are categorized as follows;plan data,geometric data,steady flow data,unsteady flow data,sediment data and hydraulic design data. Contents Starting HEC RAS Steps in Developing a Hydraulic Model with HEC RAS Importing HEC-2 Data Reproducing HEC-2 Results Getting and Using Help Download this HEC RAS ebook http://www.docstoc.com/docs/70199729/Working-with-HEC-RAS

HEC RAS This Chapter provides an example application ofhow to perfom steady flow water surface profile calculations with HEC-RAS.The user is taken through a step by step procedure of how to enter data,perfom calculations,and view the results. Contents Starting a New Project Entering Geometric Data Entering Steady Flow Data Performing the Hydraulic Calculations Viewing Results Printing Graphics and Tables Exiting the Program Download HEC RAS Manual http://www.docstoc.com/docs/70199783/Performing-steady-flow-water-profile-surface-calculations-in-HEC-RAS

Watercad manual WaterCAD is a powerful yet easy to use program that helps engineers design and analyze complex pressurized piping systems. WaterCAD�s powerful graphical interface (both in Stand-Alone and AutoCAD mode) makes it easy to quickly lay out a complex network of pipes, tanks, pumps, and more. You can use WaterCAD to: � Perform steady-state analyses of water distribution systems with pumps, tanks, and control valves. � Perform extended period simulations to analyze the piping system's response to varying supply and demand schedules. � Perform water quality simulations to determine the water source and age, or track the growth or decay of a chemical constituent throughout the network. � Perform Fire Flow Analyses on your system to determine how your system will behave under extreme conditions. � Use the powerful Scenario Management features to mix and match a variety of "What If?" alternatives on your system. Create multiple sets of hydraulic, physical prop...

HEC RAS Download HEC RAS output Variables http://www.docstoc.com/docs/70195396/HEC-RAS-output-Variables

To create a river hydraulics application with HEC-RAS,you work with projects. A project is a collection files that are used to build a model.This chapter describes projects and how you build and manage them. Contents Understanding Projects Elements of a Project Creating,Opening,Saving,Renaming and Deleting Projects Project Options To read more download "Working with Project in HEC-RAS http://www.docstoc.com/docs/70199819/Working-with-projects-in-HEC-RAS

Performing Steady Flow Analysis in HEC RAS This post includes the procedure of calculating steady flow water surface profile. This chapter is divided into two parts.The first part discusses how to enter steady fow data and boundary conditions.The second part discusses how to develop a plan and perform the calculations. Entering and Editing Steady Flow Data Performing Steady Flow Calculations Entering and Editing Steady Flow Data Once all of the geometric data are entered,the modeler can then enter any steady flow data that are required.To bring up the steady flow data editor,select Steady Flow Data from Edit menu on the HEC-RAS main window.The steady flow data editor should appear. Steady Flow Data The user is required to enter the following information: the number of profiles to be calculated;the peak flow data(at least one flow for every river reach and every profile); and any required boundary conditions. To read more download this ebook http://www.docstoc.com/docs/70199877/Perfor...

Dimensional Analysis In engineering the application of fluid mechanics in designs make much of the use of empirical results from a lot of experiments. This data is often difficult to present in a readable form. Even from graphs it may be difficult to interpret. Dimensional analysis provides a strategy for choosing relevant data and how it should be presented. This is a useful technique in all experimentally based areas of engineering. If it is possible to identify the factors involved in a physical situation, dimensional analysis can form a relationship between them. The resulting expressions may not at first sight appear rigorous but these qualitative results converted to quantitative forms can be used to obtain any unknown factors from experimental analysis. Dimensions and units Any physical situation can be described by certain familiar properties e.g. length, velocity, area, volume, acceleration etc. These are all known as dimensions. Of course dimensions are of no use without a ma...

A physical model is a scaled representation of a hydraulic flow situation. Both the boundary conditions (e.g. channel bed, sidewalls), the upstream flow conditions and the flow field must be scaled in an appropriate manner. Physical hydraulic models are commonly used during design stages to optimize a structure and to ensure a safe operation of the structure. They have an important further role to assist non-engineering people during the `decision-making' process. A hydraulic model may help the decision-makers to visualize and to picture the flow field, before selecting a `suitable' design. In civil engineering applications, a physical hydraulic model is usually a smaller- size representation of the prototype (i.e. the full-scale structure) (e.g. Fig. 14.2). Other applications of model studies (e.g. water treatment plant, flotation column) may require the use of models larger than the prototype. In any case the model is investigated in a laboratory under controlled conditions. ...