Model fitting with the inflow

qtheiler · 2015-08-13 15:57:39

Hi,

I have try to fit my model on a Hec Ras model for the inflow and outflow. The point is that the inflow is quite good (around 6 cm deeper, with a slope that I have changed) but for the inflow, I have an difference with the wse from Hec Ras but the slope doesn't change antyhing. I have wait a long time for the stationnary state (inflow = outflow) but I have still a difference of 40 cm for a depth of 6 m. How can I try to fit my model for the inflow?

Thank you very much, best regards,

Quentin

qtheiler · 2015-08-20 06:13:34

I have to fit my model with an other model (HEc Ras). I have fit my model for the inflow playing with the slope but for the inflow , the slope doesn't change really something. I have a difference of wse of 4 cm for the inflow (when I have change the slope for teh hqrelation) but for the inflow I have still a difference of 40 cm. Thank's for your help

Matteo Facchini · 2015-09-08 10:54:21

Dear Quentin,
which inflow boundary condition are you using?
Bests,
Matteo

qtheiler · 2015-10-15 06:10:25

I have use:
BOUNDARY {
type = hqrelation
name = Outflow
string_name = Outflow
slope = 1.2
weighting_type = conveyance
}
BOUNDARY {
string_name = InflowRhone
type = hydrograph
file = Inflow_stationnary_Rhone.txt
max_interval = 20
number_of_iterations = 5000
weighting_type = area
precision = -1.0
wse_calc_method = local
name = InflowRhone
slope = 0.9567

Matteo Facchini · 2015-10-20 10:26:43

Dear Quentin,

would you mind sending us your set up per email? So we can reproduce your case and try to see what is wrong.

I do not see any error in your boundary condition, so I want to give a closer look to your simulation!

Bests,

Matteo

qtheiler · 2015-10-28 07:22:11

Hi,

I think I have solve my problem. In fact, I have try to fit my 2D model with a 1D model of Hec Ras for a return period of 50 years to avoid any oveflowing. I have try to change the slope to see how close I could be to the 1D model. After some tests, I had all the time a difference of WSE around 40 cm upstream and around +- 10 cm downstream. Finally I have seen that my 1D model was different of 37 cm upstream and 3 cm downstream for the bed elevation. This means that an optimize fitting case was for a slope of 0.5 for the inflow and a slope of 1.4 for the outflow.

Thank's for your help.

Best regards, Quentin

User Forum of Software BASEMENT

#1 2015-08-13 15:57:39

Model fitting with the inflow

#2 2015-08-20 06:13:34

Re: Model fitting with the inflow

#3 2015-09-08 10:54:21

Re: Model fitting with the inflow

#4 2015-10-15 06:10:25

Re: Model fitting with the inflow

#5 2015-10-20 10:26:43

Re: Model fitting with the inflow

#6 2015-10-28 07:22:11

Re: Model fitting with the inflow

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