Hello,
I'm a student trying to work on a project and i'm running into an issue I'm hoping someone might have an idea to get around. I'm trying to create some flood inundation maps for a specific stream. I'm doing this by simply getting the stage on specific dates from the USGS gage information at multiple USGS gages. I also know the stage-discharge relation at a couple of points along the stretch of river I'm interested in, so I'm able to determine the state at these points also. With these 5 known points I know the water surface elevation, and I am hoping that I can interpolate the water surface elevation along the river between the 5 known points. What I hoped to do next was to simply subtract the interpolated water surface elevation form the land surface elevation to determine the area that is inundated during a flood. The problem I'm running into is that the Geostatistical Analysis layer I end up with after performing the interpolation is not not wide enough to cover my flood plain (see the attached image). Does anyone know how I can expand the horizontal extent of the GA layer that is created as a result of interpolation? is this possible? Any feedback would be appreciated.
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Thanks for the help,
Ben
