Well done for the excellent presentation! You make 2D modelling to seem like it's the easiest thing for a hydraulic engineer to do. Thanks again for your guidance and tips! Keep up the good job you are doing! Cheers! PS: Thanks for making me famous Chris! :)
Thanks guys! Little late but give me a turkey leg, with a side of corn casserole, and sweet potatoes. Would you normally recommend lowering the time step when going from Diffusion Wave to Full Momentum?
Ryan- that depends on what the Courant numbers are in the model using DW. If they are above 3 I would lower the time step when you switch to FM. Sorry for taking so long to respond!
hi, I am currently working on modelling glacial lake outbursts for my dissertation with HEC RAS. Therefore, I was wondering whether you have any videos relating to dam breaches or if you would do one in the near future. Thanks
What particular questions do you have Charlie? Also check out this article talking about how Chris Goodell set up 1D and 2D models of the Missoula Floods! hypernetlabs.io/hec-ras-galileo-wine-have-in-common/
@@TheRASSolution I have a working dam breach model, however, the volume of the glacial lake is calculated using elevation data of the storage area. Therefore, I was wondering whether it would be possible to enter volume data into HEC RAS model rather than have HEC RAS calculate it for you. Thanks.
@@charliewalker9060 If you make your reservoir a storage area you can give it a stage-storage volume. Doing this means that you are performing level-pool routing as opposed to dynamic wave though. I believe Chapter 14 of the Technical Reference Manual talks about ways to attempt to go from stage-storage to cross-sections. I guess it depends on the purpose of your model, time constraints, etc. if that is something that you want to pursue.
hello sir i had used HEC RAS exported data From HEC GeoRAS then i want to run HEC RAS and analysis flood mapping but I didn't get how to make input my flowdata recorded with excel sheet please help me.
Piers can be defined in the Pier editor which is within the Bridge/Culvert editor of HEC-RAS. The total length of a river reach can be measured in HEC-RAS or calculated by taking the most upstream river station (of a 1D model) and subtracting the most downstream river station.
Hey guys. I hope you have had a nice Thanksgiving day. There I have a special situation in a HEC-RAS modeling. How can I model a river which separates into two branches? How can I find the flow which diverts into the tributary reach? In fact, if I model it in 2D, it will give me the hydrograph. What about 1D modelling? Thanks for all the helpful efforts and information you share.
You can model this situation in either 2D or 1D. If you model in 1D you will need to use a Junction to split the reach into two branches. if you use 2D you will need to use a profile line to capture the flow hydrographs in each branch. We may do a Vodcast on Junctions soon so stay tuned!
Well done for the excellent presentation!
You make 2D modelling to seem like it's the easiest thing for a hydraulic engineer to do.
Thanks again for your guidance and tips! Keep up the good job you are doing!
Cheers!
PS: Thanks for making me famous Chris! :)
I can know if you have already posted a tutorial of 2 d flooding in urban areas ??
Nothing yet but this is a great idea!
Thanks guys! Little late but give me a turkey leg, with a side of corn casserole, and sweet potatoes.
Would you normally recommend lowering the time step when going from Diffusion Wave to Full Momentum?
Ryan- that depends on what the Courant numbers are in the model using DW. If they are above 3 I would lower the time step when you switch to FM. Sorry for taking so long to respond!
Thank you for sharing your knowledge! Much appreciated!
Would mind to show , how to connect !D and 2D , you taught lots us. Episode 5 was excellent, Episode 11 cool
Check out this episode to see how to connect 1D and 2D areas! ua-cam.com/video/U-nmV-wSoS4/v-deo.html
hi, I am currently working on modelling glacial lake outbursts for my dissertation with HEC RAS. Therefore, I was wondering whether you have any videos relating to dam breaches or if you would do one in the near future.
Thanks
What particular questions do you have Charlie? Also check out this article talking about how Chris Goodell set up 1D and 2D models of the Missoula Floods! hypernetlabs.io/hec-ras-galileo-wine-have-in-common/
@@TheRASSolution I have a working dam breach model, however, the volume of the glacial lake is calculated using elevation data of the storage area. Therefore, I was wondering whether it would be possible to enter volume data into HEC RAS model rather than have HEC RAS calculate it for you. Thanks.
@@charliewalker9060 If you make your reservoir a storage area you can give it a stage-storage volume. Doing this means that you are performing level-pool routing as opposed to dynamic wave though. I believe Chapter 14 of the Technical Reference Manual talks about ways to attempt to go from stage-storage to cross-sections. I guess it depends on the purpose of your model, time constraints, etc. if that is something that you want to pursue.
What is the meaning if we get negative and zero values when we draw cross section to our study area for 1D river analysis??
Are you referring to station or elevation values?
hello sir i had used HEC RAS exported data From HEC GeoRAS then i want to run HEC RAS and analysis flood mapping but I didn't get how to make input my flowdata recorded with excel sheet please help me.
Ibnu- I will need something more specific to help you out.
Is it possible to design a labyrinth spillway using HEC-RAS
Hello sir,
1. How to change the shape of piers ?
2. How to know Total length of river ?
Piers can be defined in the Pier editor which is within the Bridge/Culvert editor of HEC-RAS. The total length of a river reach can be measured in HEC-RAS or calculated by taking the most upstream river station (of a 1D model) and subtracting the most downstream river station.
Hey guys. I hope you have had a nice Thanksgiving day. There I have a special situation in a HEC-RAS modeling. How can I model a river which separates into two branches? How can I find the flow which diverts into the tributary reach?
In fact, if I model it in 2D, it will give me the hydrograph. What about 1D modelling? Thanks for all the helpful efforts and information you share.
You can model this situation in either 2D or 1D. If you model in 1D you will need to use a Junction to split the reach into two branches. if you use 2D you will need to use a profile line to capture the flow hydrographs in each branch. We may do a Vodcast on Junctions soon so stay tuned!