tag:blogger.com,1999:blog-1675184707067447729.post41637051850949782..comments2023-07-12T07:12:04.697-07:00Comments on The RAS Solution: Combining Two Reaches or Splitting OneChris G.http://www.blogger.com/profile/00354834185663924786noreply@blogger.comBlogger24125tag:blogger.com,1999:blog-1675184707067447729.post-92153923499573106672019-10-17T22:48:19.730-07:002019-10-17T22:48:19.730-07:00how to insert a tributary in the existing reach in...how to insert a tributary in the existing reach in HEC RAS 1D model<br /> Anonymoushttps://www.blogger.com/profile/14672612135247794875noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-58667927417402718722019-09-17T09:50:13.663-07:002019-09-17T09:50:13.663-07:00It will allow me to disconnect the upstream reach,...It will allow me to disconnect the upstream reach, but if I try to disconnect the downstream reach it gives me an error message and closes HEC-RAS. Even with the upstream portion disconnected the extra center line shows up. It doesn't seem to affect the calculations though Daily Loguehttps://www.blogger.com/profile/06811372994867138824noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-76159144674358558282019-09-17T07:53:33.022-07:002019-09-17T07:53:33.022-07:00Try disconnecting the reaches from the junction, r...Try disconnecting the reaches from the junction, rather than deleting the junction. See if that works.Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-15460624461640526122019-09-17T05:04:25.778-07:002019-09-17T05:04:25.778-07:00I used this technique to split a river into 3 reac...I used this technique to split a river into 3 reaches, I then updated the geometry (center line and topo) for the central reach. When I then delete the junctions, the old centerline reappears over the new one. How do I fix this? Or is it just there graphically and will not affect calculations?Daily Loguehttps://www.blogger.com/profile/06811372994867138824noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-30647729586059697132019-05-29T10:08:30.503-07:002019-05-29T10:08:30.503-07:00How about redoing your stationing so that they are...How about redoing your stationing so that they are consistent?Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-47910427749596715772019-05-22T09:19:59.532-07:002019-05-22T09:19:59.532-07:00I've solved my problem by change staions' ...I've solved my problem by change staions' names. Thank you very much!Anonymoushttps://www.blogger.com/profile/10648033784740823195noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-32235104876802700722019-05-22T08:54:39.378-07:002019-05-22T08:54:39.378-07:00Unluchily,my river stationing for the two reaches ...Unluchily,my river stationing for the two reaches are NOT consistent prior. Could you please tell me what I should do to make it work? Thanks a lot!Anonymoushttps://www.blogger.com/profile/10648033784740823195noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-4598128837228403332019-05-02T09:32:46.899-07:002019-05-02T09:32:46.899-07:00For steady flow, at a minimum, you need to provide...For steady flow, at a minimum, you need to provide the flow at the upstream end of each reach. Below a converging junction, the flow should be the sum of the two tributaries. For unsteady flow, you just need an upstream boundary condition (at a minimum). However, you have to define the flows at each reach for the initial conditions.Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-9898966786584774882019-04-30T19:31:09.908-07:002019-04-30T19:31:09.908-07:00Hi,
I am beginner in HEC-RAS. I have a river havi...Hi,<br /><br />I am beginner in HEC-RAS. I have a river having multiple reaches, tributaries and Junctions. Hec-RAS is asking me to provide boundary condition at start of each reach which is connected through junction. I assumed that HEC-RAS needs only one upstream boundary for river (instead of boundaries at start of each reach). Where I am making mistake, kindly guide me. Thanks in advanceAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-31493303776830108622019-02-11T12:50:55.831-08:002019-02-11T12:50:55.831-08:00Awesome! Glad it worked Phil. Thanks for reading...Awesome! Glad it worked Phil. Thanks for reading the blog and thanks for the kind regards! Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-3479623202824261142019-02-10T11:26:53.692-08:002019-02-10T11:26:53.692-08:00This worked perfect and I got the results I wanted...This worked perfect and I got the results I wanted. As many others have stated, thank you for all your responses. This blog and the forum are an invaluable resource for HED-RAS users.Phil Goodehttps://www.blogger.com/profile/15133657760295345054noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-13149105192031966862019-02-06T10:07:55.954-08:002019-02-06T10:07:55.954-08:00Yeah, I think somewhere between when I wrote this ...Yeah, I think somewhere between when I wrote this and the current version of RAS, they made that change in the software. I'll add a note in the original post so that others will know to do this. Let me know if it doesn't work.Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-5697813851454300952019-02-06T10:01:07.532-08:002019-02-06T10:01:07.532-08:00Thanks Chris. That step was not in the original a...Thanks Chris. That step was not in the original article, but I'll add a note and try again.Phil Goodehttps://www.blogger.com/profile/15133657760295345054noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-55113594119010839012019-02-06T09:22:35.087-08:002019-02-06T09:22:35.087-08:00Make sure to click on the junction and select &quo...Make sure to click on the junction and select "disconnect reaches", before you delete the junction.Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-37673513261769335012019-02-05T22:03:44.049-08:002019-02-05T22:03:44.049-08:00I can split the reach into two parts with differen...I can split the reach into two parts with different names like I want, but when I delete the temporary items (River, Reach, Junction), HEC-RAS v5.0.6 joins the split reaches back into one reach.Phil Goodehttps://www.blogger.com/profile/15133657760295345054noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-14643376282756006222019-01-13T10:01:43.287-08:002019-01-13T10:01:43.287-08:00Thank you very much.
This post was very helpful!Thank you very much.<br />This post was very helpful!Aviv Shapirahttps://www.blogger.com/profile/07631849138534765224noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-44807397135165860972018-10-02T15:09:49.361-07:002018-10-02T15:09:49.361-07:00No worries, i managed to solve this. I changed the...No worries, i managed to solve this. I changed the names and closed the geometry, and once i opened it again it was fine. Thanks again for the post!Anonymoushttps://www.blogger.com/profile/06683779270324909637noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-81770262115735868272018-09-24T20:16:19.869-07:002018-09-24T20:16:19.869-07:00Thanks a lot for this post, am relatively new with...Thanks a lot for this post, am relatively new with HEC-RAS and want to join to segments, but am having problems with the cross sections names. I think am having the problem you warn about, but am not sure how to solve it. I updated the name of the cross sections hoping this would solve the issue, but it did not. I also tried using GIS Tools-->Reach Invert Lines Table to check the location of points, but the location seems to be ok in both segments, so do not know what to do. Any advise would be greatly appreciated. RegardsAnonymoushttps://www.blogger.com/profile/06683779270324909637noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-70178785903524293062018-08-17T07:10:09.727-07:002018-08-17T07:10:09.727-07:00Can you model 2 structures on the same reach in He...Can you model 2 structures on the same reach in Hecras?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-63180179138365474562018-08-01T12:21:45.943-07:002018-08-01T12:21:45.943-07:00I have two streams that I would like to join. I u...I have two streams that I would like to join. I use the move/edit points tool to drag one node on top of the other, and it prompts me to create a junction. So I do. But the junction isn't where I wanted it to be, it moves all the way to the top of the river, creating a long straight line from one river that crosses over the other to get to its first most upstream point. How do I stop it from doing that? Anonymoushttps://www.blogger.com/profile/12387015861965380059noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-28411198023890266652018-04-21T17:32:57.719-07:002018-04-21T17:32:57.719-07:00Hmmm. Not sure what’s happening there. I would s...Hmmm. Not sure what’s happening there. I would suggest trying to import again but use a different name for your imported river reach. Then once in RAS, move the reach end point to combine the reaches. Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-49604680020551471842018-04-19T15:37:56.777-07:002018-04-19T15:37:56.777-07:00I imported the geometry of model 2 into an existin...I imported the geometry of model 2 into an existing model 1 and the river reach did not plot, however, the river stations and their cross sections did. ? I first had to change projection of geometry 2 from NAD 83 to NAD 27 in order for it to align with geometry 1. I guess I'm curious why the river does not plot, although it did import? I re-digitized the river that did not seem to import using google maps and the station cross sections, but now I need to rename the river to match the river identified in the station. When I attempt to do so, I get a message stating "Existing river-reach: cannot be renamed because another river-reach already has that name." If I remove the river, it removes all the associated stations and cross sections, which I need. How is the best way to rename the river to match that what is identified in the river stations? TK (USBR)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-1882096492239342732018-02-26T20:57:58.711-08:002018-02-26T20:57:58.711-08:00No, that I not allowed in RAS. No, that I not allowed in RAS. Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-42833330029367190292018-02-26T11:28:15.998-08:002018-02-26T11:28:15.998-08:00A reviewer of asking me to split up a continuous r...A reviewer of asking me to split up a continuous reach into multiple reaches even though it has no tributaries or flow splits. Is it possible or recommended? When I do it using the above procedure, if I leave the junction the model uses the junction as boundary conditions between these fake reaches, but gives an error for having a junction where there is no trib or split, if I delete the junction it runs but requires boundary conditions be re-defined for each reach. GRGhttps://www.blogger.com/profile/08527397783413900153noreply@blogger.com