[GRASSLIST:1365] GRASS integration with MODFLOW

GRASS GRASS user
1

I am starting up a large urban land use groundwater quality study (40 km by 60 km
study area, 50 m cell size, 3000 wells to be sampled 10 times over 15 years) in
Nova Scotia, Canada, for which GRASS is beautifully suited.

GIS information will include: geology (soil and bedrock lithology, chemistry,
metamorphic grade, mine locations, known mineral deposits, depositional and
structural fabric), physical hydrogeology (site well construction and geology data,
average pumping rates, groundwater elevation, seasonal level changes), lake
water chemistry, topography, precipitation and other climatic data, vegetation,
groundwater recharge characteristics (derived from other layers), prevailing wind
direction (study sea spray affects), all available urban land use data, any other
information useful to the study, plus 40 to 50 chemical parameters (and various
interpretation maps derived thereafter).

I will also need to do 3-D groundwater modeling in the study area (perhaps at
various scales), and I am thinking of using MODFLOW and other related USGS
groundwater modeling programs for that purpose. In that regard, the only Linux
pre-post processor for MODFLOW that I am aware of is Uncert (are there
others?), which I have not tried yet. However, it would be great if I could integrate
GRASS with MODFLOW somehow to facilitate the study.

I understand that someone did some work to integrate MODFLOW with GRASS
(version 3.0?). Does anybody know what may have come of this work? Has
anyone tried to integrate groundwater models (MODFLOW in particular) with
GRASS versions 4 or 5? Finally (a concept question for those with knowledge of
the GRASS inner workings and direction of development), would it be difficult to
write code to integrate MODFLOW, MODPATH and perhaps other related USGS
groundwater migration model programs with some future version of GRASS?

Regards,

        Rick

RG Hydro-Environmental Ltd.
WaterWatch ..... independent groundwater research

Richard Gagne, P.Geo., President
PO Box 25099
Halifax, NS Canada B3M 4H4

e-mail: rghydro@waterwatch.com
phone: (902) 457-7010
fax: (902) 457-3934

2

On Fri, Jan 16, 1998 at 05:23:12PM +0000, Rick Gagne wrote:

I am starting up a large urban land use groundwater quality study (40
km by 60 km study area, 50 m cell size, 3000 wells to be sampled 10
times over 15 years) in Nova Scotia, Canada, for which GRASS is
beautifully suited.

GIS information will include: geology (soil and bedrock lithology,
chemistry, metamorphic grade, mine locations, known mineral deposits,
depositional and structural fabric), physical hydrogeology (site well
construction and geology data, average pumping rates, groundwater
elevation, seasonal level changes), lake water chemistry, topography,
precipitation and other climatic data, vegetation, groundwater
recharge characteristics (derived from other layers), prevailing wind
direction (study sea spray affects), all available urban land use
data, any other information useful to the study, plus 40 to 50
chemical parameters (and various interpretation maps derived
thereafter).

I will also need to do 3-D groundwater modeling in the study area
(perhaps at various scales), and I am thinking of using MODFLOW and
other related USGS groundwater modeling programs for that purpose. In
that regard, the only Linux pre-post processor for MODFLOW that I am
aware of is Uncert (are there others?), which I have not tried yet.
However, it would be great if I could integrate GRASS with MODFLOW
somehow to facilitate the study.

I understand that someone did some work to integrate MODFLOW with
GRASS (version 3.0?). Does anybody know what may have come of this
work? Has anyone tried to integrate groundwater models (MODFLOW in
particular) with GRASS versions 4 or 5? Finally (a concept question
for those with knowledge of the GRASS inner workings and direction of
development), would it be difficult to write code to integrate
MODFLOW, MODPATH and perhaps other related USGS groundwater migration
model programs with some future version of GRASS?

I'll try to take a look at the MODFLOW, etc... programs. I'm thinking
they might have alot of DOS'isms which might make it difficult to
compile under unix boxen. I have a few colleagues who are familiar with
MODFLOW who could also benefit from such an interface. Definitely a
worthy companion to grid3 functionality...

--
Eric G. Miller <egm2@jps.net>