tag:blogger.com,1999:blog-1675184707067447729.post7439265912036510500..comments2023-07-12T07:12:04.697-07:00Comments on The RAS Solution: Using a HEC-RAS Storage Area and Lateral Structures to Replace Standard Reach JunctionsChris G.http://www.blogger.com/profile/00354834185663924786noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-1675184707067447729.post-11354287365142376122020-01-09T01:21:59.606-08:002020-01-09T01:21:59.606-08:00Hello Chris,
Can you please specify how to accoun...Hello Chris,<br /><br />Can you please specify how to account the outflow from 2D area back to the 1D river over the lateral structure? The inflow is clear, through lateral structure connected to the 2D flow area. However how to account the outflow of water ffom the same 2D flow area further downstream back to the 1D river?<br /><br />I looked at the example data, Muncie, where is modeled 1D-2D scheme, and where the lateral structure goes all along the river reach and it seems that the water from 2D area is not getting back to the river donwnstream, or am I wrong? If I allowed particle tracing the water seeemd to circle in the 2D flow area.<br /><br />Can you please tell me how to set the model so the water which flow to the 2D flow area upstream will leave the same 2D flow area later downstream back to the river?<br /><br />Thank you very much!<br /><br />I appreciate your work, great blog!Vaclavhttps://www.blogger.com/profile/06648927594208765685noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-13060130464580451912020-01-09T01:21:45.015-08:002020-01-09T01:21:45.015-08:00Hello Chris,
Can you please specify how to accoun...Hello Chris,<br /><br />Can you please specify how to account the outflow from 2D area back to the 1D river over the lateral structure? The inflow is clear, through lateral structure connected to the 2D flow area. However how to account the outflow of water ffom the same 2D flow area further downstream back to the 1D river?<br /><br />I looked at the example data, Muncie, where is modeled 1D-2D scheme, and where the lateral structure goes all along the river reach and it seems that the water from 2D area is not getting back to the river donwnstream, or am I wrong? If I allowed particle tracing the water seeemd to circle in the 2D flow area.<br /><br />Can you please tell me how to set the model so the water which flow to the 2D flow area upstream will leave the same 2D flow area later downstream back to the river?<br /><br />Thank you very much!<br /><br />I appreciate your work, great blog!Vaclavhttps://www.blogger.com/profile/06648927594208765685noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-9725041831327846352020-01-09T01:21:43.663-08:002020-01-09T01:21:43.663-08:00Hello Chris,
Can you please specify how to accoun...Hello Chris,<br /><br />Can you please specify how to account the outflow from 2D area back to the 1D river over the lateral structure? The inflow is clear, through lateral structure connected to the 2D flow area. However how to account the outflow of water ffom the same 2D flow area further downstream back to the 1D river?<br /><br />I looked at the example data, Muncie, where is modeled 1D-2D scheme, and where the lateral structure goes all along the river reach and it seems that the water from 2D area is not getting back to the river donwnstream, or am I wrong? If I allowed particle tracing the water seeemd to circle in the 2D flow area.<br /><br />Can you please tell me how to set the model so the water which flow to the 2D flow area upstream will leave the same 2D flow area later downstream back to the river?<br /><br />Thank you very much!<br /><br />I appreciate your work, great blog!Vaclavhttps://www.blogger.com/profile/06648927594208765685noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-20052117882037248852020-01-09T01:19:45.097-08:002020-01-09T01:19:45.097-08:00Hello Chris,
Can you please specify how to accoun...Hello Chris,<br /><br />Can you please specify how to account the outflow from 2D area back to the 1D river over the lateral structure? The inflow is clear, through lateral structure connected to the 2D flow area. However how to account the outflow of water ffom the same 2D flow area further downstream back to the 1D river?<br /><br />I looked at the example data, Muncie, where is modeled 1D-2D scheme, and where the lateral structure goes all along the river reach and it seems that the water from 2D area is not getting back to the river donwnstream, or am I wrong? If I allowed particle tracing the water seeemd to circle in the 2D flow area.<br /><br />Can you please tell me how to set the model so the water which flow to the 2D flow area upstream will leave the same 2D flow area later downstream back to the river?<br /><br />Thank you very much!<br /><br />I appreciate your work, great blog!Petrnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-21324232643058715862019-01-14T06:40:30.833-08:002019-01-14T06:40:30.833-08:00Nick,
I should clarify that the lateral weir sensi...Nick,<br />I should clarify that the lateral weir sensitivity is based on increasing the stability factors to 3 in the computation options. Doing this is likely the reason I'm not seeing as much sensitivity as you would anticipate. Also I am modeling coastal areas when low velocities and fairly flat water surface profiles with the laterals quickly becoming submerged. I have found a few instances where there was stability problems across the lateral representing the tributary channel when using a Cd of 2.0. This has usually been where the tributary is modeled in 2D with no direct flow assignment and the flow is largely pushed across the lateral from the 1D main channel into the 2D. Lowering the Cd value usually solves the instability. So the Cd values I'm presenting are not hard and fast values. The model results should always be reviewed for stability and reasonableness by looking at the hydrograph flow/stage on each lateral. Anonymoushttps://www.blogger.com/profile/15144837118184024215noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-47859777881388882432019-01-11T10:26:28.156-08:002019-01-11T10:26:28.156-08:00Not really the same as the method presented here, ...Not really the same as the method presented here, but yes, I've done that in the past. As you found out, pump stations can't be added to 2D areas yet. So you have to put them in a small storage area attached to the 2D area. This typically works well with deeper depths. Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-9815918209277231672019-01-08T17:23:17.821-08:002019-01-08T17:23:17.821-08:00Thanks Chris, this is a great post and great blog....Thanks Chris, this is a great post and great blog. I'm curious if anyone has had success using this method to connect two 2D areas with a pump station. For example, 2D area 1 outlets to storage area 1, storage area 1 is connected to storage area 2 with a pump station, storage area 2 outlets to 2D area 2.<br />Jeff D.noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-85266357112266847192019-01-06T23:06:12.496-08:002019-01-06T23:06:12.496-08:00Is the method introduced above described in the sa...Is the method introduced above described in the same way in the HEC manuals?MaximeLnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-34141943384332885672019-01-02T04:43:01.548-08:002019-01-02T04:43:01.548-08:00I gave a presentation on Junction Hydraulics for t...I gave a presentation on Junction Hydraulics for the ASCE Mississippi Section 2-years ago discussing this exact subject. I showed result comparisons for the 2D coupled model vs the standard 1D junction. Im also an H&H Engineer in Houston. Glad to see people are catching up. If people would just read software manuals and expand their mind, modeling processes will continue to improve. Luis Partidahttps://www.blogger.com/profile/01824766953730158483noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-48335725015896429092019-01-02T01:31:21.410-08:002019-01-02T01:31:21.410-08:00That really is a great post! I used HEC-RAS long a...That really is a great post! I used HEC-RAS long ago and it is likely that I will use it again pretty soon, I will definitely use that method to integrate tributaries, it seems it's worth it!MaximeLnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-9607149307130940672018-12-31T14:27:52.505-08:002018-12-31T14:27:52.505-08:00This article is fantastic and timely! Thank you f...This article is fantastic and timely! Thank you for posting this. The laterial weir sensitivity (coefficient) was surprising and good information. Happy New Year.<br />Nickhttps://www.blogger.com/profile/01806574651526925185noreply@blogger.com