http://www.flo-2dforum.com/ Forum for FLO-2D users en-US Wed, 08 Feb 2012 15:17:56 +0000 http://bbpress.org/?v=1.0.2 q http://www.flo-2dforum.com/search.php http://www.flo-2dforum.com/topic/importing-street-geometry#post-80 Tue, 07 Feb 2012 16:56:58 +0000 Karen 80@http://www.flo-2dforum.com/ <p>Lesson 9-11 should be on the latest down-loadable installation. You don't have to reinstall, you can just download the installation and find the files and transfer them to your computer.<br /> <a href="http://www.flo-2d.com/downloads/model-demo" rel="nofollow">http://www.flo-2d.com/downloads/model-demo</a> </p> http://www.flo-2dforum.com/topic/importing-street-geometry#post-79 Tue, 07 Feb 2012 16:06:25 +0000 meric 79@http://www.flo-2dforum.com/ <p>Thank you..<br /> By the way, in the Example Projects folder, up to Lesson 8 folders exist. How can i get Lesson 9-10-11 folders? </p> http://www.flo-2dforum.com/topic/importing-street-geometry#post-78 Tue, 07 Feb 2012 15:59:53 +0000 Karen 78@http://www.flo-2dforum.com/ <p>At this time creating street data is very much a manual process. You can use your dwg or shp files along with the polyline tool to create streets but you will still need to enter all the other data manually. You can use the global variables for width, curb height and mannings n. If you have street elevation, you'll have to enter that for each street element.</p> <p>See lesson 11 for more information on streets an intersections. </p> http://www.flo-2dforum.com/topic/importing-street-geometry#post-77 Tue, 07 Feb 2012 15:55:29 +0000 meric 77@http://www.flo-2dforum.com/ <p>Is there any way to import street geometry from dwg or shp file? </p> http://www.flo-2dforum.com/topic/levee-length-vs-flo-2d-levee-length#post-76 Thu, 01 Dec 2011 22:08:37 +0000 Karen 76@http://www.flo-2dforum.com/ <p>A new feature of the GDS helps account for flow overtopping a levee. When the user assigns the levee by polygon over a long distance, then the actual portion of the levee in the grid element may be shorter than the Levee component. The levee component length is assigned using the GE Width * 0.41412 (this is the length of the octagon side). For example, if a grid element has a levee assigned to 3 directions, the levee crest length is 3 x 0.41412 x GE Width. If the physical levee is a straight line across the grid element the calculated discharge length could be too long. </p> <p>The discharge computed over a broadcrested weir (Q = C*L*H^1.5 and L would be the levee crest length) This length might be too long using all three sides. This can be corrected by adding a WRF value to the side of the grid element. The GDS does this automatically for the "polylines" by computing the entire length of the levee and assigning the appropriate WRF value to the individual grid elements. </p> http://www.flo-2dforum.com/topic/what-computer-system-should-i-use-with-flo-2d#post-75 Wed, 09 Nov 2011 19:24:14 +0000 Karen 75@http://www.flo-2dforum.com/ <p>I use a computer with 8 MB RAM, 4 Intel Core 2.5 GHz processors. I have a 64-Bit OS. My graphical processor is kind of slow and that makes the GDS screen refresh time a bit longer than I'd like. This computer is not the fastest but it works quite well. If you plan to make models in excess of 250,000 grid elements and large hydrographs, I suggest you go with a gaming computer.</p> <p>12 processors<br /> Intel Xeon 3.xx GHz<br /> Turn off hyperthreading<br /> 8+ Gigs RAM </p> http://www.flo-2dforum.com/topic/interopolate-from-multiple-elevation-files-option-overlapping-flt-files#post-74 Thu, 20 Oct 2011 18:53:13 +0000 Karen 74@http://www.flo-2dforum.com/ <p>It's pretty simple. If there are multiple points with the exact xyz only one will be used. If there are multiple points with the same xy and a different z the highest elevation will be used. </p> http://www.flo-2dforum.com/topic/interopolate-from-multiple-elevation-files-option-overlapping-flt-files#post-73 Wed, 19 Oct 2011 22:30:08 +0000 Pani R 73@http://www.flo-2dforum.com/ <p>Thank you, Karen. Does this mean that the elevations in the overlapping areas are not double counted in assigning grid elevation values?. I just want to alleviate the concern that overlapping areas might introduce a bias in elevation calculation.</p> <p>Thank you </p> http://www.flo-2dforum.com/topic/interopolate-from-multiple-elevation-files-option-overlapping-flt-files#post-72 Wed, 12 Oct 2011 21:48:11 +0000 Karen 72@http://www.flo-2dforum.com/ <p>You can use overlapping binary fit grids. There isn't a problem with this because each point is considered in the interpolation calculation regardless of which file it comes from. What you don't want to do is overlap baseline elevation with design elevation. For example, you don't want to load LiDAR data for a baseline elevation and then load the raised elevation of a proposed subdivision on top of that. </p> http://www.flo-2dforum.com/topic/interopolate-from-multiple-elevation-files-option-overlapping-flt-files#post-71 Fri, 07 Oct 2011 21:24:22 +0000 Pani R 71@http://www.flo-2dforum.com/ <p>I have used this oprion to assign elvations from multiple overlapping binary flt grids. GDS seems to be assigning the elevations correctly and overlapping doesnot seem to create any problem. Is this an valid assumption?. what would you recommend?</p> <p>Thank you so much </p> http://www.flo-2dforum.com/topic/levee-express-editor-duplicate-levee-segment-removal#post-70 Thu, 25 Aug 2011 02:21:02 +0000 Pani R 70@http://www.flo-2dforum.com/ <p>Hi, I was working on integrating two levee files (intersecting levees)that had some duplicate levee segments. When I removed the first duplicate levee segment using "Levee Express Editor",FLO-2D removed all the duplicate instances. I'm excited about (but I was not aware before of) this capability. I would like to know more about the procedure that FLO-2D uses to resolve the duplicate levee segments.</p> <p>Thank you </p> http://www.flo-2dforum.com/topic/floodplain-channel-flow-exchange-text-reporting-clarification#post-69 Thu, 28 Jul 2011 21:21:20 +0000 Pani R 69@http://www.flo-2dforum.com/ <p>Great!. This answers the few doubts that I had about the approach.</p> <p>Thanks for the quick response, Karen &amp; Jim. </p> http://www.flo-2dforum.com/topic/floodplain-channel-flow-exchange-text-reporting-clarification#post-68 Thu, 28 Jul 2011 21:06:07 +0000 Karen 68@http://www.flo-2dforum.com/ <p>I don’t see anything wrong with this approach. I would review the velocities in VELTIMEC.OUT and VELTIMEFP.OUT to make sure there is no surging in the model. Make sure the velocities area reasonable. If the flow is very slow, you may need higher n-values to avoid surging. If you model a small discharge, so that there is almost no flow, check the water surface elevations for reasonableness. </p> <p>The depths are always reported after the floodplain channel exchange. The sequence is:</p> <p>Channel routing<br /> Floodplain routing<br /> Update results<br /> Channel floodplain exchange<br /> Update results<br /> Write to output files </p> http://www.flo-2dforum.com/topic/floodplain-channel-flow-exchange-text-reporting-clarification#post-67 Thu, 28 Jul 2011 19:52:18 +0000 Karen 67@http://www.flo-2dforum.com/ <p>Hi Pani,</p> <p>I've sent your question on to Jim. You should see a reply soon. </p> http://www.flo-2dforum.com/topic/animating-flo-2d-results-using-gdsrun-files#post-66 Thu, 28 Jul 2011 19:50:26 +0000 Pani R 66@http://www.flo-2dforum.com/ <p>Your suggestion worked great, Karen. I was able to use the time lapse output data file to create animations within ArcGIS. </p> <p>Thank you so much. </p> http://www.flo-2dforum.com/topic/floodplain-channel-flow-exchange-text-reporting-clarification#post-65 Thu, 28 Jul 2011 19:45:56 +0000 Pani R 65@http://www.flo-2dforum.com/ <p>Hi, I'm modeling a depressed roadway about 1250 ft long and at about 15 feet deep at the lowest point compared to the surrounding floodplain elevation. The roadway is cutting through a railroad embankment modeled as levee 6 ft tall compared to the floodplain elevation. The depressed roadway starts at the floodplain elevation about 600 ft upstream of the railroad and keeps getting deeper until right below the railroad crossing and then starts rising in depth until getting back to the floodplain elevation in about 600 ft downstream of railroad crossing.</p> <p>I'm modeling the depressed roadway as rectangular channel and its width is 2 ft less than the octagonal side of the cell. The flow between two sides of the railroad embankment is only through the channel and the 2 ft floodplain.</p> <p>As expected, on both the upstream side and downstream side, there is a lot of floodplain-channel flow exchange. I also have put two one- element floodplain cross-sections: one on the upstream channel cell and the other on the downstream channel cell.</p> <p>My questions are<br /> (1) is the modeling approach valid? My results suggest that the hydraulic behavior is reasonable.<br /> (2) flow depths reported in Base.out, Hycross.out, hychan.out and other out files, do they report the depths before the floodplain-channel exchange or after the exchange? The results I have suggest that the reported depths are before the exchange, if so, is there a way to obtain the depths after the floodplain-channel exchange?</p> <p>Thank you </p> http://www.flo-2dforum.com/topic/animating-flo-2d-results-using-gdsrun-files#post-64 Wed, 06 Jul 2011 22:15:46 +0000 Karen 64@http://www.flo-2dforum.com/ <p>You can animate the simulation within the GDS but it isn't saved as a result. If you want to make the animation files please read the Mapper Tutorial in the Workshop Lessons book. It gives detailed instructions on how to make time lapse output data files. Then you can use Mapper and a screen capture program to create a movie or you can create a shapefile of each animated interval and make the movie in ArcGIS. </p> http://www.flo-2dforum.com/topic/animating-flo-2d-results-using-gdsrun-files#post-63 Wed, 06 Jul 2011 19:29:56 +0000 Pani R 63@http://www.flo-2dforum.com/ <p>Hi, is there a way I can animate FLO-2D run results using GDSRUN.### files (previously genetated by FLO-2D during a run with "Animate within GDS" option was chosen)?. Can this be readily done by Mapper or other executables? This would really help in presenting the results.</p> <p>Thank you </p> http://www.flo-2dforum.com/topic/hydraulic-structures-rating-table-discharge-vs-available-discharge#post-62 Thu, 19 May 2011 00:07:40 +0000 Karen 62@http://www.flo-2dforum.com/ <p>This situation would most likely cause an instability problem because as the structure tries to take 100 cfs from an inflow of 50 cfs the water surface at the inlet would go way down. Then the water surface in the structure would be higher and so it would cause a backwater effect and the system would oscillate back and forth causing numerical instability. You can see this with wildly oscillating hydrographs that occur in regions of channels where the channel cross sectional area varies significantly. </p> <p>There are instances where box culverts are wider than the channel and the channel will get wide and then narrow again in the culvert transition zone. In this case, it would be necessary to take the cross section upstream and downstream of that transitional area in order to make the rating table. This would help ensure that the rating table matched the physical system. </p> http://www.flo-2dforum.com/topic/hydraulic-structures-rating-table-discharge-vs-available-discharge#post-61 Wed, 18 May 2011 22:34:59 +0000 john@jefuller.com 61@http://www.flo-2dforum.com/ <p>What does FLO-2D do if the rating table for a hydraulic structure (e.g., culvert) indicates a structure discharge which is greater than the availabe incoming supply of flow from grids surrounding the inlet node? For example, the structure rating table specifies 100 cfs flow in the structure @ 4 foot depth at the inlet node, but the available inflow that corresponds to a depth of 4 feet at the inlet node is only 50 cfs. </p> http://www.flo-2dforum.com/topic/what-computer-system-should-i-use-with-flo-2d#post-60 Fri, 29 Apr 2011 16:58:21 +0000 Karen 60@http://www.flo-2dforum.com/ <p>FLO-2D will run on Windows XP, Vista and 7 with a 32-bit or 64-bit OS. We recommend that you purchase a 64-bit system with at least 4 processor cores. Processor speed is a very important consideration. The Intel(R) Core(TM) processor has shown remarkably faster run-time speeds over less efficient processors. </p> <p>For very large projects, gaming computers have proven to be effective at decreasing the total simulation time. They typically have the best computing processors and graphical processors. </p> <p>We’ve also seen an decrease in simulation time by turning off hyper-threading. </p> http://www.flo-2dforum.com/topic/floodplain-roughness#post-59 Thu, 28 Apr 2011 19:06:37 +0000 Karen 59@http://www.flo-2dforum.com/ <p>Yes, if you don't want the n-values to adjust at all then set AMANN = -99 and SHALLOWN = 0.00. That will turn off any n-value adjustment and depth variable roughness due to shallow flow. It doesn't matter if SHALLOWN is set to 0.00. That's just what we do. You have to set AMANN = -99.</p> <p>If you want to globally adjust the n-values use AMANN with the following conditions.</p> <p>AMANN = - 0.4 to +0.4; These values cause the n-values in fplain.dat to increase or decrease by subtracting or adding the AMANN value to each n-value. </p> <p>AMANN is greater than 1.0; These values cause the n-values in fplain.dat to increase by multiplying each n-value by AMANN. </p> http://www.flo-2dforum.com/topic/floodplain-roughness#post-58 Thu, 28 Apr 2011 18:32:15 +0000 john@jefuller.com 58@http://www.flo-2dforum.com/ <p>I was wondering if you could clear up some confusion for me. I have been under the impression for some time that the floodplain roughness cannot be reduced below 0.1 for shallow flow conditions, regardless of the AMANN setting. But some new info circulating in our office suggests that setting AMANN to -0.99 and SHALLOWN to 0.00 will cause the model to use ONLY the roughness values in FPLAIN.DAT (i.e., no adjustment at all). Can you confirm? Thanks! </p> http://www.flo-2dforum.com/topic/hydraulic-structures-and-model-run-time#post-57 Thu, 28 Apr 2011 17:19:43 +0000 Karen 57@http://www.flo-2dforum.com/ <p>Hydraulic structures shouldn't affect the timestep like that. You might have the structure set up incorrectly. Check the hystruc.dat file against the one in the data input manual. Try to isolate which structure is causing the timestep decrements by running the model with one structure on at a time. Just do this by deleting the other structure from the data file. </p> <p>There is also a training video for hydraulic structures.</p> <p><a href="http://www.flo-2d.com/webinars" rel="nofollow">http://www.flo-2d.com/webinars</a></p> <p>If you still have problems once you've found the structure and are sure it is set up correctly, make some test runs on it. Use the Time.out file to help determine which grid element is causing the timestep decrements. Then use the pocket guide to help you optimize the "Sticky" grid element.</p> <p>There is also a Free optimization training video on the website.</p> <p><a href="http://www.flo-2d.com/webinars" rel="nofollow">http://www.flo-2d.com/webinars</a> </p> http://www.flo-2dforum.com/topic/hydraulic-structures-and-model-run-time#post-56 Thu, 28 Apr 2011 17:04:22 +0000 Alan 56@http://www.flo-2dforum.com/ <p>I have been adding hydraulic structures to one of my models. I have been noticing since I have done that, my model time steps have gone from 7 - 8 seconds a time step to 0.003 seconds or worse per a time step. One Model is small in area, has modestly sized grid cells, and would run in less than three hours to get through a 14-hour simulation. With the addition of two hydraulic structures, the model has now been running for over 24 hours and has only made it through 1.5 hours of simulation time. Does anyone have any tricks to improve the time steps with hydraulic structures? At the current model run rate, the model will run for 13 days. I guess I am having a problem understanding why the model run times would see a 100-fold increase by adding rating curves for two structures. Any help will be greatly appreciated! </p> http://www.flo-2dforum.com/topic/batch-mode#post-54 Wed, 16 Mar 2011 00:24:29 +0000 Karen 54@http://www.flo-2dforum.com/ <p>Teamviewer also works with RiverFLO-2D. RiverFLO-2D doesn't work with all remote software but it does work well with teamviewer. </p> http://www.flo-2dforum.com/topic/batch-mode#post-53 Tue, 15 Mar 2011 16:55:25 +0000 franciscosanchez 53@http://www.flo-2dforum.com/ <p>Hello, I use teamviewer (www.teamviewer.com) to access to my computer when runs Flo2D. It's very easy to install and configure, you have a free version, and Android and Iphone apps too. </p> http://www.flo-2dforum.com/topic/batch-mode#post-52 Fri, 18 Feb 2011 14:27:52 +0000 Karen 52@http://www.flo-2dforum.com/ <p>That patch won't come out until the next update release. That's sometime within the next 4 to 6 months. </p> http://www.flo-2dforum.com/topic/batch-mode#post-51 Thu, 17 Feb 2011 23:36:16 +0000 cameronj 51@http://www.flo-2dforum.com/ <p>any news on the *.exe that can run in batch mode? </p> http://www.flo-2dforum.com/topic/riverflo-2d-2011#post-50 Mon, 07 Feb 2011 19:15:12 +0000 Karen 50@http://www.flo-2dforum.com/ <p>Hi Luis,</p> <p>Can you contact Reinaldo directly through email? <a href="mailto:reinaldo@flo-2d.com">reinaldo@flo-2d.com</a> You can ask him in Spanish and he can give you more detailed information on RiverFLO-2D. Thanks </p> http://www.flo-2dforum.com/topic/riverflo-2d-2011#post-49 Mon, 07 Feb 2011 19:07:07 +0000 Luis 49@http://www.flo-2dforum.com/ <p>I need to know if it will be a version 2011 of Riverflo-2D. I am waiting for a update which uses normal water level like Hec Ras uses. </p> http://www.flo-2dforum.com/topic/interpolation-limit#post-48 Thu, 03 Feb 2011 01:36:43 +0000 Karen 48@http://www.flo-2dforum.com/ <p>1. Did you use the instruction guide you can get it on the website:<br /> <a href="http://www.flo-2d.com/wp-content/uploads/FLO-2D_GDS_New_Interpolation_Method.pdf" rel="nofollow">http://www.flo-2d.com/wp-content/uploads/FLO-2D_GDS_New_Interpolation_Method.pdf</a><br /> 2. Make sure the data is space or comma delimited and remove any tabs. If you are an ultraedit user just click Format/Tabs to Spaces. I suggest using space delimited. You can do a find and replace to get rid of commas. I only suggest this because that is the way I did it when I interpolated my multiple data files. That was over 100 million points onto 1.97 million grid elements and it worked very well and only took about 5 minutes.<br /> 3. Make sure the data file has the .txt extension.<br /> 4. If the interpolation is not being performed it might indicate that a data point is invalid. I don't know if there is a data validation yet. You might have something like a shifted decimal or a shifted line that makes your data run together. </p> http://www.flo-2dforum.com/topic/interpolation-limit#post-47 Wed, 02 Feb 2011 23:11:49 +0000 cameronj 47@http://www.flo-2dforum.com/ <p>I am trying to interpolate a ascii grid I created in GIS from a 5 ft DEM into a grid in GDS. When I try the new method of doing it, none of the cells get any values when it is finished. Is there a limit to the amount of points? The DEM covers 65 square miles and the ascii grid file has 80 million values. The current grid I am using has 200 ft grid cells but I may have to drop it down to 100 ft grid cell sizes. </p> http://www.flo-2dforum.com/topic/batch-mode#post-46 Wed, 02 Feb 2011 02:58:06 +0000 Karen 46@http://www.flo-2dforum.com/ <p>Logmein.com is the site. It has a free version and a paid version. </p> http://www.flo-2dforum.com/topic/batch-mode#post-45 Tue, 01 Feb 2011 21:46:56 +0000 cameronj 45@http://www.flo-2dforum.com/ <p>I have a Android phone, what is the name of the app? This would be very helpful. </p>