Intergating SWAT with HEC-RAS, ISIS, IQQM

[Liêm Nguyễn Duy]

Hi all,

Anyone can give me some experiences about integrating swat with other models such as HEC-RAS, ISIS, IQQM, etc...?

Thanks a lot!

---

Nguyen Duy Liem.
Department of Applied Geomatics (GIS),
Faculty of Environment and Natural Resources,
Nong Lam University- Ho Chi Minh City.
Address: Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam.
Email: nguyen...@gmail.com

[jens]

Hi Nguyen,

I have used SWAT output for running HEC-RAS.

When delineating your subbasins in SWAT you already have to keep the
HEC-RAS model domain in mind. HEC-RAS requires boundary conditions at
all upstream reaches which can be supplied by subbasin flow (or
sediment load) from SWAT. So set your subbasin outlets according to
the HEC-RAS domain.

I calculated the flow for each HEC-RAS cross section from SWAT output.
I took the flow directly from SWAT for tributries and assigned them to
the respective cross section. For HEC-RAS reaches located within a
SWAT subbasin I distributed the flow from that particular subbasin
along all HEC-RAS cross sections in the subbasin. In that way it was
possible to account for groundwater (or overland flow) contributing to
the HEC-RAS cross sections.
I also extracted the MUSLE sediment load from each subbasin. So, SWAT
was used for depicting the field erosion while HEC-RAS took care of
the in-stream erosion and deposition processes. I automatized the data
transfer in ArcGIS with a Python script. It works fine for my
application, but it is not (yet) suitable for general usage.

I ran HEC-RAS in quasi-unsteady mode for a couple of years on a daily
time step and it worked fine. Though, the run times for HEC-RAS are
quite long (a couple of hours), depending on the model complexity and
time series length.

Best regards and all the best for your modelling work
Jens

On 15 Feb., 05:30, Liêm Nguyễn Duy <nguyenduy1...@gmail.com> wrote:
> Hi all,
> Anyone can give me some experiences about integrating swat with other
> models such as HEC-RAS, ISIS, IQQM, etc...?
> Thanks a lot!
>
> ---
>

> *Nguyen Duy Liem.*

> Department of Applied Geomatics (GIS),
> Faculty of Environment and Natural Resources,
> Nong Lam University- Ho Chi Minh City.
> Address: Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam.

> Email: *nguyenduy1...@gmail.com*

[Liêm Nguyễn Duy]

Thank you for sharing,

That is very useful information for me.

Best Regards,

Vào 18:07 Ngày 15 tháng 2 năm 2012, jens <jensk...@gmail.com> đã viết:

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Nguyen Duy Liem.

Department of Applied Geomatics (GIS),
Faculty of Environment and Natural Resources,
Nong Lam University- Ho Chi Minh City.
Address: Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam.

Email: nguyen...@gmail.com

[nguyenduy]

Dear Jens,

You can give me some information about your application related to SWAT and HECRAS?

I am interested in the topic.

I am looking forward to hearing from you.

Thanks and Best Regards,

[jens]

Dear Nguyen,

I don't know what information could help you besides what I wrote in my first post.
Could you be a bit more specific?
Have you started with your project and ran into a problem?

Best regards,
Jens

[Liem, Nguyen Duy]

Dear Jens,

Long time no hear from you.

How about your work? 

I remember you said that you developed one application which can automatize the data transfer between SWAT and HEC-RAS in ArcGIS with a Python script. You can share it with me?

I am looking forward to hearing from you!

Thanks!

Liem