Inundación por tormenta de diseño en GIS Pro

maryk43

Hola,

Actualmente estoy intentando modelar la inundación por tormenta de diseño (tormentas de 10, 50, 100 años) en GIS Pro. He estado aprendiendo las herramientas ArcHydro (y Spatial Analyst>Hydro) y esto es realmente útil, pero todavía falta un paso para poder convertir esto en un mapa de inundación por tormenta de diseño. Idealmente, me gustaría modelar esta inundación por tormenta sin tener que cambiar de programa. Estoy usando GISPro y no puedo usar geoHec-RAS dentro de la plataforma gis. Mi empresa está trabajando para actualizar a la versión más reciente de GIS Pro que debería tener la herramienta de simulación. Sin embargo, no puedo encontrar cómo se aplica esta profundidad de lluvia: ¿se aplica con un hidrograma unitario?

¿Hay alguna herramienta o proceso que me haya perdido y que pueda ser útil para este objetivo? ¡Gracias a todos por su ayuda!

MarkBoucher

I come at this from the engineering/hydrologist side. I've been learning GIS and Arc Hydro as I go.

I don't know of any tools for ESRI GIS programs (ArcMap/ArcGIS Pro) that will take rainfall and transform it into runoff (flow). [aka rainfall runoff (RR) transformation ]. I found this article in a quick search but it is academic and may not be ready for real-world application:  

https://www.sciencedirect.com/science/article/abs/pii/S235293852100063X. 

 

If someone knows how to do all of the hydrology and hydraulic (H&H) calculations inside an ESRI GIS program, let everyone know.

 

In using GIS to do this in our agency below are the general steps I am aware of. I have done all of these, but not yet from start to finish on one project.

1. Use Arc Hydro to delineate watersheds and gather input parameters for HEC-HMS. (HEC-HMS has some GIS capabilities built in, but it does not seem to have fully functional GIS tools yet. For example, it will tell you what the centroidalflowpath distance is, but will not display the centroidalflowpath for you to confirm - at least that was my limited experience. It may be possible to do the whole watershed characteristics and RR transformation in HEC-HMS. HEC-HMS will also deal with routing flows through reservoirs and down long reaches of streams/rivers.
2. Use HEC-HMS to calculate the flows (hydrology)
3. Use GIS to create inputs for HEC-RAS, likely using GeoRAS. (HEC-RAS has some very good GIS like functions in a sub-application that is started w/in HEC-RAS called RAS Mapper. HEC-RAS is also needed to model bridges.
4. Run model in HEC-RAS. (hydraulics) HEC-RAS can run a 1D using (cross sections: cross sections can be input from survey information or cut from a terrain model. The careless use of a terrain model should be avoided. [caution: LiDAR based terrain of a creek under tree cover can be very poor.] or a 2D model using a terrain model [note same caution]. The model is run and the output can be in a put in a form (layer/raster) that is readable by ESRI GIS programs.
5. Add the HEC-RAS output into GIS.

We have created flows in HEC-HMS and, using the standard HEC-DSS format for the HMS output, read from the DSS file directly into HEC-RAS (1D model) to run an unsteady hydraulic model to evaluate the creek capacity.