www.autodesk.com/civil3d-stormwater AutoCAD ® Civil 3D ® 2008 Using Hydraflow S torm Sewers Extension with AutoCAD Civil 3D 2008: A Recommended Work flo w The ability to perform storm water hydrology and hydraulic (H&H) tasks is crucial to civil and environmental engineers. Currently , most H&H tasks are accomplished using Microsoft ® Excel ® program, or other third-party applications, with no direct connection to civil engineering design and construction documentatio n software. As a result, engineers are forced to transfer data between various programs, which results in increased time, inefficiency, and a higher risk of error. To better accommodate engineers working on these tasks, Civil 3D subscribers now have access to Hydraflow Storm Sewers Extension for AutoCAD ® Civil 3D ® 2008 software.
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Using Hydraflow Storm Sewers Extensionwith AutoCAD Civil 3D 2008:A Recommended Workflow
The ability to perform storm water hydrology and hydraulic (H&H) tasks iscrucial to civil and environmental engineers. Currently, most H&H tasks areaccomplished using Microsoft ® Excel ® program, or other third-partyapplications, with no direct connection to civil engineering design andconstruction documentation software. As a result, engineers are forced to
transfer data between various programs, which results in increased time,inefficiency, and a higher risk of error. To better accommodate engineersworking on these tasks, Civil 3D subscribers now have access to HydraflowStorm Sewers Extension for AutoCAD ® Civil 3D ® 2008 software.
Civil 3D Layout .....................................................................................................................................................................................
Civil 3D Surfaces ..............................................................................................................................................................................
Civil 3D Pipe Networks .....................................................................................................................................................................
Exporting Hydraflow Storm Sewers Extension files to Civil 3D .........................................................................................................
USING HYDRAFLOW STORM SEWERS EXTENSION WITH AUTOCAD CIVIL 3D 2008
Introduction Hydrologic and hydraulic (H&H) engineering has often been considered a subset of civil and environmental engineering in which
engineers focus solely on H&H analysis and design. Engineers who work on H&H tasks deal with issues involving the flow and stora
of water, including drainage, reducing the effects of floods and droughts, and water quality.
Some basic H&H tasks include, but are not limited to:
Watershed runoff analysis
Channel analysis, including water surface elevations and floodplain delineation
Sedimentation and erosion analysis
Storm water management and urban drainage
Reservoir system simulation and analysis
Computational hydraulics
Culvert design
Detention pond design
This white paper provides a recommended workflow for storm sewer design and analysis using Civil 3D 2008 pipe networks andHydraflow Storm Sewers Extension.
Civil 3D Layout
Civil 3D Surfaces
Typically, the first step in the H&H design process is to develop a base map that contains all the surface information. Using the surfa
analysis tools in Civil 3D, you can gather topographic information about the site with which you are working. This helps you with
finalizing the site design.
Some useful surface analysis tools include the following:
Slope labels, slope arrows, and spot elevations
Legend tables
Water drop
Quick ground profiles
Contour-based slope analysis
The result of the analysis and design of the surface is a combined surface derived from existing (predevelopment) and proposed (po
development) surface data. This surface should include any corridor surfaces for roadways or paved areas and grading objects for
other site properties.
While analyzing the surface, you can also create subcatchment boundaries (drainage areas). This can be done by reviewing the
topography and delineating areas either by hand or using Civil 3D to create parcels or polylines. The data from these subcatchmentboundaries can be used to perform hydrologic analyses. You should also gather the following data that is specific to the area in whic
the project is located:
Soil hydrologic group data
Cover type and other subsurface data
Floodplain data
Coefficient of runoff (C) values for catchment areas
USING HYDRAFLOW STORM SEWERS EXTENSION WITH AUTOCAD CIVIL 3D 2008
Import
DXF filesImport/export
LandXML
Hydraflow Storm Sewers ExtensionWhen you launch Hydraflow Storm Sewers Extension, a new storm sewers project opens automatically. Notice the options available
quick importing and exporting.
To import a DXF file to use as your background image, click the Import button.
To import a LandXML file from Civil 3D, click the In/Out button, and when the dialog box appears, make sure you are on the Imp
tab. Browse to your LandXML file, and click Open. You will notice that any pipe networks contained in the LandXML file are liste
under Available Pipe Networks. Highlight the network, use the check boxes to select the import options, and click Import. Note t
multiple networks can be imported into Hydraflow Storm Sewers Extension at
once.
When importing LandXML files, you will also notice the option to
import alignments and parcels as a background. This may be an alternative to importing a DXF image.
Once the networks and DXF background image have been imported, you can add known data into the current pipe layout before
moving on to the calculations. The known data may include flow values, existing pipe sizes, existing inverts, and so forth.
Select and highlight the pipes or manhole/inlet structures that you want to add data to. Click the Data button or double-click the
component to open the Add/Edit dialog box. This dialog box contains the properties of the pipe and inlet/junction, including length, s
USING HYDRAFLOW STORM SEWERS EXTENSION WITH AUTOCAD CIVIL 3D 2008
Data for the pipes and inlet can also be added or edited in table format. Clicking the Pipes or Inlets tab at the top of the main screentakes you to a table in which you can edit values as necessary.
USING HYDRAFLOW STORM SEWERS EXTENSION WITH AUTOCAD CIVIL 3D 2008
Alternatively, you can click a specified profile view and choose Profile View Properties. Use the check boxes in the Draw column to
select the pipes and structures you want to show in that view.
After adding pipes to profiles, you can use the DXF file of the profile that was created in Hydraflow Storm Sewers Extension and inse
as a block into your current drawing. The HGL line is simply an object in AutoCAD ®
software, and it can lay directly on top of the pro
you have created in Civil 3D.
Creating Project DocumentsOnce you have completed your analysis, finalized your design, and applied all the appropriate object and labels styles, the final task
to create production documents or submittals. These documents could include a set of construction plans, a design report, or simply
interim submittal to a client.
Plan or profile sheets are commonly used to show pipe size, slope, invert elevations, and crossings. In Civil 3D, you can use the Pla
Production tools to customize and create your own plan and profile sheets.
USING HYDRAFLOW STORM SEWERS EXTENSION WITH AUTOCAD CIVIL 3D 2008
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