2D Flood Modeling at Community Level Using HEC-RAS

[@tuesdaygood7336]

Thanks a lot for sharing the information. I was working on GeoHECRAS and this really helped!

[@googlespace1392]

Thanks sir...i am.very glad..your voice is very clean and nice... ..Now its very helpful for.other... Kindly upload more tutorials on etabs safe in English....

[@rupamgayan2081]

How to provide mannings roughness coefficient?you have not shown it in the video.

[@tyeasmin]

Hello, I was watching your video and it’s very informative. I am wondering if you have any other video for Flood Impact Analysis, such as HEC FIA? Thanks,

[@zainabbutt3726]

just wanted to ask do we have to import subbasins which were generated in hechms, in hecras and then do we need to define boundary condition for each subbasin separately or do we have to create a single 2d flow area perimeter for all the subbasins as whole, for 2D flood modeling? as we'll be using outputs from hechms which were generated for each subbasin

[@amrmohamedabdelkhalek9133]

How I can get velocities in x, and y directions in 2D model?

[@larolaujodi2144]

i wish u make video dam break analysis using hecras

[@manjunathakrmanju4168]

i need to get result a different discharges of water flood mapping please ? How can i add data??

[@usgsalcsarmiento9578]

A partir de dónde lo obtuviste ese modelo de elevación por favor.???

[@homayounkhoshnod3150]

how to generate GIS map for the HEC-RAS . can you Explained for the GIS layers using for the HEC-RAS thanks advance

[@larolaujodi2144]

i use tif file for hecras, but my computer so poor someday my computer maybe explode

[@pathanazaz3471]

Amazing Effort Omar. i would like to ask you one thing is that what about land use and land cove or Mannings value in 2D modeling? If we ignore to add the land use data and mannings n value, is is validate?

[@OmarMagdyNofal]

You consider these factors during the hydrologic analysis, not the hydrodynamic analysis. So, these factors including land use, soil, etc affected the discharge. Then the roughness affects the velocity during the hydrodynamic analysis.

[@nbrahmareddy7690]

Hello Users, I just need some insights on Breaklines. I have added breaklines into the 2d mesh area and enforced them as internal connections and entered weir data as top spillway elevation at 700m to the connections assuming they are acting as Embankments/weirs to the reservoir. But After I ran the Unsteady flow model successfully, in the results section in the RAS Mapper Water still flowing over the embankments at 653.55 only without filling the reservoir up to 700m elevation. What Should I do? Thank you in Advance #HECRAS #2dMODELING

[@basheerkhalil5892]

great explanation. but I have a question, why Up1, Up2, and Up3 have the same hydrograph values? every inlet should have their won specific values as I think?

[@OmarMagdyNofal]

This just an example, not real values for simulation! However, for this study area, only one hydrograph for the northwest upstream was available.

[@usgsalcsarmiento9578]

Cómo puedo obtener un dem pero que sea de alta resolución por favor🙏🙏🙏🙏

[@thechaoticneuron]

How to use this approach for urban rain flooding?

[@raidanmaqtan2652]

Thanks please, do you how to solve the problem of Ras Mapper when not open?

[@siminakhlaghi5466]

I am modeling flood mapping ,I create my location point from google earth as Kml format and then I create dem in gis as *'adf format not tiff, ( because I didn't know how I can convert that to tiff and I want they maintain elevation ) when I import dem file to rasmapper, when I define terrain to hecras and upload my dem from gis, they aren't loaded into hecras and error is appeared. How can I solve this problem? How can I convert my point location from google earth to rasmapper .

[@OmarMagdyNofal]

why you did not directly download the DEm online?

[@siminakhlaghi5466]

@@OmarMagdyNofal because sometimes I need a location which its dem is not available, or I want that with more accuraty. And sometimes u may have cad contour, therefore I need to create dem as tiff.

[@hulk8889]

Can you send me this files? Thanks...

[@himayoonnaik5950]

Are you serious, you are telling her that landcover is included in DEM, you will need to creat a landcover layer using the roughness shapefiles.

[@OmarMagdyNofal]

Himayoon Naik how? At which minute?

[@ninamack9755]

@@OmarMagdyNofal Right around minute 42, she asks if HEC-RAS takes land cover (e.g. surface roughness) into account, and you refer back to the DEM. But the DEM only includes surface topology, not actual surface roughness of different land use types.

[@hardikpatel-ne7jj]

hi Omar, I must say your video is very useful to me. But here i'm having some trouble regarding .prj & .shp file. As i have shown in your video you directly import that file from your saved folder. I just have to know how to CREATE this 2 Files. Is there any useful handy software to create?? Pls let me know the process asap as i'm having this stuff as my project. Thanks

[@thechaoticneuron]

Hello, I'm also working on flood mapping in India. Please connect to me on [e-mail] We shall exchange some notes

[@zahinrana924]

@@thechaoticneuron hello I'm also working on it currently can you please help me out

[@thechaoticneuron]

@@zahinrana924 Reach me on email

[@zahinrana924]

@@thechaoticneuron thank u for quick response I'm have send you a mail.

[@zahinrana924]

Hello!!! U received mail ,right??

[@ahmeddagher]

Is It the time to make an upgrade and bring a new recording mic ولا ايه بس عاش والله 😄👏👏

[@OmarMagdyNofal]

بس الصوت عندى كويس جدا

[@ahmeddagher]

Omar Magdy Nofal الفكره نفسها ان صوت حضرتك اوطي من صوت تكتكة الماوس فاحضرتك ممكن تقرب الميكروفون من حضرتك او تبعد الموس عنه

[@ahmeddagher]

Omar Magdy Nofal بس عاش برده 😄 المحتوي نفسه نفسه محدش عندنا في مصر بيعمله