Alireza Vahidi

Hi All, I have a question. I appreciate it if someone could help me. I have a long culvert (55 m) with 2 pipes (D=1.8 m).  I wanted to know if it possible to model it as a culvert in mike 11.(As I know in some hydraulic models like Hecras the maximum length of culvert should not be more than 4 or 5 m ) Is it similar in mike 11? if so, How can I model this two pipe in mike 11?(I could n't find any information on reference manual)   
Cheers

Thanks for your response.

Thank s for your response Aurelian.
Do you think it is necessary to define weir for the close cross section(in case of  over topping)?
cheers.

Hi everyone, I have a question, I appreciate that if some one could answer my question.
I have a long culvert(15 m) with an overflow gate at the beginning of it.( The level of gate is changing based on the water level behind the structure). I wanted to model this structure in Mike 11. I wanted to know if that is enough to use control str option (In tabular view) and define the gate and the control definitions , or I have to define the culvert separately? 
Cheers,

what is hotstart date and time in simulation window? Is it should be the first time step of hot start or the last time step of hot start?
what does add to file do?
Sorry for these simple Questions.  There is no explanation in mike 11 user guide.
Cheers.

Hi Mathieu,
I have a Question about your response. I appreciate that if you take a look at it.
Are link channels real or just hypothetical means to help us to model flood pains in mike 11?
If water spills from long distance of bank, is it still possible to use link channels or we should use side structures?
cheers.

Is there anyone has" MIKE 11 HD River Model Setup and Modules Application ManualTraining exercise" pdf  and it's exercise data?
Is it free to use?

Hi,
I have a question I appreciate that if any one can help me
Imagine there are  a river and road along each other (for example 200 m) I want to know how I can Model it in Mike11 . Is it possible to model it with side weir ( broad crest)? 
I have done this procedure:
1-After inserting my network and cross sections, I inserted a new cross section( same as road longitudinal profile along the river) at the chainage which  my road is starting to go along the river.(I just changed the topo Id and did not change the river name and chainage)
2- Then inserted  side weir at the the first chainage (I mean the chainage which both river and road start to be along each other)
Type: side structure broad crest weir, geometry type : cross section Db
Questions:
How can I specify the side which my weir is located?
when I press plot button, Mike 11 doesn't show the weir it just show upstream and down stream cross sections. Is it ok?  The only change is that the calculate Q/H button is activated
Do I need to change head loss factors , LPI, LPo ,... or not?
If  roadway is above the natural terrain( the weir geometry(cross section DB)is above the natural terrain) do Mike model it as vertical wall?
cheers.

Hi Mathieu,
Firstly thanks for your response.
Then, I have more questions. I appreciate that if you take look at these.
In Mike 11 user’s  guide is mentioned that no cross sections are required  in link channel (page 64- Mike 11 user guide 2009)  instead  we can use [b]edit link channel parameters[/b] in tabular view and insert cross section geometry(depth-width table.) But I think you suggest that(If I am not wrong) defining a cross section at the beginning of link channel as the bank spilling elevation and cross section at the end of link channel to represent the storage.
I think (If I am not wrong) these link channels don't really exist (The river spills along it's bank not from specific points) we just assume these channel link to be able to model the spillage in 1d.  Now my question is that how can I find  the best link channel geometry? should it be rectangular? How long should be the width of link channel?  if I have to put a cross section at the beginning of link channel, should  it be the same as river bank longitudinal profile at that  chainage? (For example  river bank longitudinal profile  from chainage 5000 to 5005)what should be the bed resistance  and  head loss Coefficients?(There is no suggestion in user manual)
Best regards.

Hi Mayhieo,
Firstly I appreciate your complete response.
I have some more questions I appreciate that if you can answer my questions.

[b]Case 1[/b]

[b]1[/b]-If I have a river and a floodplain (Along each other) How can I use link channel to connect river and floodplain? (There is no structure separating  the river from the floodplain (Floodplain connected to river through natural terrain) and flood plain is perform as storage,I have attached the the jpeg file to make it clear).
I have done this procedure:
[b]1[/b]- First I established the river network and cross sections.( Just the main river without the floodplain)
[b]2-[/b] I made another branch with just two nodes (Change it to link channel in tabular view) and connect it to main branch with connect branch tool( Is it correct?)
[b]3[/b]- To define the linked channel  I chose spill elevation  as upstream bed level and floodplain first point elevation as down stream level. I chose the Width of terrain (High ground) which separate main river from floodplain(4 meters in this example)

[b]Question 1[/b]: Is there any limit for the length of linked channel? what if river and floodplain is divided with just 1 meter high ground?
[b]Q2[/b]: How can I insert linked channel geometry into the program? (I mean for irregular geometry (Natural terrain) there is no option for plotting the geometry!
[b]Q3[/b]- what should I do if floodplain stretch long distance along river side ? should I define multiple linked channels? or it is better to use mike flood?

[b]4[/b]-  Then I chose additional storage at the end of linked channel
[b]Question[/b] : where can I insert the storage elevation  curve in to mike11?

[b]case2[/b]

In case of existence of levee or vertical wall (Short width: less than 1 m) should I use weir(side structure with reservoir) ?
Is there any option to plot  weir( side structure) along the river? whenever I click plot option, it just plots upstream and down stream cross section!)
doesn't it t need to insert the end chainage of  side structure? Does mike 11 calculate it based on width which we have defined in geometry section (level-width)?

[b]Thanks in advance.
[/b]