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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | RE: GISList: how to calculate drainage density and reclassification |
| Date: |
12/05/2002 11:30:45 AM |
| From: |
Lega, Robert |
|
|
Drainage density is the number of miles(or some distance) of permanent stre=
ams per square mile of watershed area.=20=20
D =3D L/A
Where D is the drainage density in miles per mile, L is the length, and A =
is the area in sq/miles
Another, but much less used is Stream density, which is the number of perma=
nent streams pre sq/mile or segments per watershed area...
Personally I like to use the less know Watershed Eccentricity (Black 1972) =
which takes into consideration the unique shape of watersheds.
RSL
Sanborn
GIS Specialist
-----Original Message-----
From: Neil Havermale [mailto:neilh@redhensystems.com]
Sent: Thursday, December 05, 2002 10:14 AM
To: 'KT': gislist@geocomm.com
Subject: RE: GISList: how to calculate drainage density and
reclassification
Methods discussed at:
Topic 5 - Analyzing Accumulation Surfaces
Topic 9 - Analyzing Landscape Patterns
http://www.innovativegis.com/basis/MapAnalysis/Default.html
-----Original Message-----
From: KT [mailto:nisan54@yahoo.com]=20
Sent: Thursday, November 28, 2002 11:39 PM
To: gislist@geocomm.com
Subject: GISList: how to calculate drainage density and reclassification
Dear List,
I want to draw stream net of any basin and calculate drainage density and
reclass of the
calculated drainage density in arc/info. If you share your info with me, I
will be
glad.Thanks in advance.
KT
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