I've not found a module or integrated tool to model aquatic (primarily
fish) habitats by stream/river or drainage basin. I've looked at the Wiki
and searched fairly extensively with Google and have not found anything
useful ... that runs on linux or the *BSDs.
Has anyone created such a tool or adapted rivers2d, IFIM, PHABSIM, or
similar models to work with GRASS?
Pointers and suggestions greatly appreciated.
Rich
I don't know of anything, but would be very interested in anything
that you turn up.
kindest regards,
Stephen Sefick
On Thu, Jul 29, 2010 at 1:01 PM, Rich Shepard <rshepard@appl-ecosys.com> wrote:
I've not found a module or integrated tool to model aquatic (primarily
fish) habitats by stream/river or drainage basin. I've looked at the Wiki
and searched fairly extensively with Google and have not found anything
useful ... that runs on linux or the *BSDs.Has anyone created such a tool or adapted rivers2d, IFIM, PHABSIM, or
similar models to work with GRASS?Pointers and suggestions greatly appreciated.
Rich
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Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.
\-K\. Mullis
On Thu, 29 Jul 2010, Rich Shepard wrote:
I've not found a module or integrated tool to model aquatic (primarily
fish) habitats by stream/river or drainage basin. I've looked at the Wiki
and searched fairly extensively with Google and have not found anything
useful ... that runs on linux or the *BSDs.
Stephen/Brent:
I've found nothing but a couple of references to simple models running on
ESRI's software and comments on the short-comings of the standard (at least
here in the US) IFIM/PHABSIM[1] models. There is an interesting report of
aquatic habitats from the perspective of adult walleye in Lake Erie that
demonstrated the lack of information and value when measurements are
averaged, another report that where stream/river transects are placed
(absolutely and relative to each other) influences the PHABSIM output of
'Weighted Usable Area,' and a third report that notes the disconnect between
hydraulic and morphometric models and the complexities and heterogeneities of
water chemistry and microhabitats that control where fish (and their food
organisms) are found.
The IFIM/PHABSIM suite were originally developed as research tools by the
US Forest Service which makes them less than optimal for resource allocation
and permitting decisions.
The numeric (and rare spatial) models also do not cover the habitat needs
of the complete life cycle of a species nor variations among co-habitating
species in the same stream/river system or reach.
What this all suggests to me is that from an applied viewpoint (that is,
providing technical informations for well-informed policy or regulatory
decisions) there is nothing readily available.
I know the approach that I would take, and I might just develop a model
that is more practical and appropriate if I have the time. No one's going to
fund my efforts so it may be quite a while until something is ready for use.
Rich
[1] Instream Flow Incremental Methodology and Physical Habitat Simulation.
The latter is a component of the former.