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Cara Pedley

SuDS and Flooding Rendering

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Does anyone have any tips on what tools/textures I should use to create a flood event scenario on my 3D site design. Or does anyone have any images to show of work that they have done for inspiration? I would like to create a rendered flood event with water in swales / rain gardens and potentially on pavements / in buildings - so I can do a series of images from a none flood event to a serious flood event.

 

Not sure if vectorworks is capable, but is it possible to calculate the volume water in different flood events?  Based on the water flooding the lower elevations first?

 

Thanks!

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Create a simple solid for the water. Apply a water texture from the vectorworks library and make the colours a bit brownish.

 

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Posted (edited)

@Cara Pedley 
Imagine, in a simple terrain, the flood as a rising volume or water table . The water surface will be a flat, level plane. Site elements will be evident everywhere above this level at any moment during the flood event. The water level/table will rise to different levels as the flood event progresses (and later recede). 

In the case of this simple terrain, a flood event can be represented by extruding a polygon traced over the site boundary in TopPlan view. The height of the extrude will represent the water table/flood extent at the moment chosen (often the moment of max predicted flooding).

 

To find the volume of flood water, use the Subtract Solids command (modeling menu). Subtract the terrain from the extrude (enable option to retain the subtracting object - or use a duplicate of the terrain model).  Apply the Volumetric Properties command to report the volume. If visible surface area is needed, apply the Extract Surface tool to each “pool”. Apply a water texture to these surfaces as suggested by@herbieherb 


A more complicated, or stepped site with retaining walls, buildings and other constructed elements, water falls, swales with significant fall (running streams or current), may require several water table solids with tilted tops instead of extrudes, and separate solid subtractions at the several levels. For these it may be best to duplicate the file so that the terrain and all the other site elements can be combined into a single Solid Addition object on a single layer. If the Solid addition process becomes balky, it may be beneficial to add the site objects in batches and convert the result to Generic Solid each time.  Separate, smaller extrudes or other solids represent the flood at each differentiated area of the site. Solid subtract the combo terrain element object from the solid at each area and copy paste or reference into a new layer in the original file.

 

Sheet drainage and incidental puddles (wheel ruts, worn pathways, slight low spots in paving, etc) can be handled as low extrudes or 3dPolys or NURBS Surfaces with dirty water texture drawn over appropriate areas. Or, the Project tool, Landscape Area tool, or even the Spoil Pile Tool can establish these shapes and accept the texture. 
 

Post back if this isn’t working or if help needed. 
 

-B

 

Edited by Benson Shaw
Drawing state

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Very nice Luis. I assume that you used the polygon method suggested by Benson and raised the level by a few inches for each frame? What were the steps to create the animation?

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Nope. I needed a tool that can raise the face dynamically. Subdivision is the correct tool for these types of animations. Granted, all I needed is to record my screen at the same time.

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I've done similar with multiview—one perspective view and one elevation (ortho mode) using nudge command 😉. Screen recording of just one screen.

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