水文学モデリングと水理学モデリングの連携

Question

<\/HEAD>こんにちは、私は学術コースの一環として洪水モデリングプロジェクトに取り組んでおり、ArcHydroとHEC-GeoRASの両方を使用しようとしています。ArcHydroを使用した流域区分プロセスは、その後の水理学モデリングに必要な入力データを生成しますか？これら二つのモデリングプロセスは連携されることがありますか、それとも通常は非常に別々の成果のために使われますか？また、stream definition toolから作成されたriver schematicは、HEC-GeoRASを使ってArcで川の中心線をデジタイズする際のガイドとして使用できますか。<\/SPAN> ご提供いただけるいかなる洞察にも感謝します。<\/SPAN> Myla-Rae<\/SPAN><\/BODY><\/HTML>

Myla-RaeBaldwin · Answer

Thank you for pointing me to that link. 
Very helpful. HEC-RAS will be tackled later while I explore this avenue. 
Thanks,
Myla-Rae

MarkBoucher · Answer

You can do some approximation using relative water levels. This thread was posted very recently and addresses that.
http://forums.arcgis.com/threads/79620-Calculate-maximum-flooded-area-based-on-maximum-flood-levels-along-a-stream

Myla-RaeBaldwin · Answer

Thanks very much for your reply Mark. I think my team members and I got ourselves a little over our heads with this project, trying to learn HEC-RAS without any hydrological background. In my research I have discovered that many of the decisions that need to be made using HEC-GeoRAS requires a certain level of hydrological knowledge. If we just want to show three possible flood extents over a terrain based on a high, average and low river flow levels over a ten year period, is it possible to do this using only ArcHydro tools? Or does mapping flood extents without having river geometry at our disposal, (only river gauge readings and a DEM) make it necessary to use another software suite such as HEC-RAS/HEC-HMS?

Again, thanks for your timely reply,
Myla-Rae