Hello!
Is there a GRASS tool that can identify flooded areas on basis of a DEM and
water stages at different points along a river course (where the water
surfaces between points are inclined)?
Thank you in advance!
Trond Rinde
--
Trond Rinde
Research Scientist (Doctor Engineer)
SINTEF - Bygg og miljøteknikk tel: +47 73 59 24 11
Hydrologi og vassdrag fax: +47 73 59 02 01
Klæbuveien 153 email: trond.rinde@civil.sintef.no
N-7465 Trondheim url: www.sintef.no/units/civil/water
Trond,
GRASS has numerous tools that will pertform the tasks you mention,
and there are several ways to utilize them. Simple methods range from
using a modified r.reclass to more complex methods using hydrologic
models such as HEC or SWAT then feeding the output into GRASS.
There is also a suite of tools (f-tools) for flood analysis that uses the old
HEC-2 model to plot surface water profiles. Several years ago when I
worked for Blackland Research Center on SWAT dev., we came up
with a relatively simple script for plotting surface water profiles using the
GRASS modules r.mapcalc, r.reclass, and r.watershed. I think I may
still have it on a tar tape if you're interested I can look for it. One issue
that I do remember was it was necessary to resample our dem's down
to a smaller grid resolution to produce a map that looked reasonable.
Let me know if this helps or you need anything else.
Bruce
Trond Rinde wrote:
Hello!
Is there a GRASS tool that can identify flooded areas on basis of a DEM and
water stages at different points along a river course (where the water
surfaces between points are inclined)?Thank you in advance!
Trond Rinde
--
Trond Rinde
Research Scientist (Doctor Engineer)SINTEF - Bygg og miljøteknikk tel: +47 73 59 24 11
Hydrologi og vassdrag fax: +47 73 59 02 01
Klæbuveien 153 email: trond.rinde@civil.sintef.no
N-7465 Trondheim url: www.sintef.no/units/civil/water