Hello Tejaswi

The problem is that the method that you are using doesn't fit for
chemical parameters, because those values could be from decimals to
thousands. I Strongly recommend you to use Krigging method, BUT using
the appropiete variogram. The best software could be SURFER or an
Arcview extention for krigging (you can find out in the internet).

Regards

Xavier COELLO-RUBIO
UNESCO-IHE
The Netherlands


--- In hydrologymodel@..., Maribeth Milner
<mmilner1@u...> wrote:
>
> Tejaswi,
>
>     There are many algorithms for interpolating data.  Some
are "exact" (in
> that they return the value of the input data) and some
are "inexact".
>
>     The Surfer (http://www.goldensoftware.com/) documentation
provides this
> list of exact and inexact interpolators...
>
> Exact:
> Inverse Distance to a Power (no smoothing function)
> Kriging (no specified nugget effect)
> Nearest Neighbor
> Radial Basis Function (no R2 specified)
> Modified Shepard's Method (no smoothing factor)
> Triangulation with Linear Interpolation (TIN)
> Natural Neighbor
>
> Inexact:
> Inverse Distance to a Power (with smoothing factor)
> Kriging (with error nugget)
> Polynomial Regression
> Radial Basis Function (with R2 specified)
> Modified Shepard's Method
>
> Note... the ability to return input values may or may not be
related to
> surface accuracy.  To test accuracy, hold out (don't use) a few
well
> positioned data points and compare those values with their
predicted
> values.  All interpolators have problems at the edges of data sets,
so be
> sure to collect extra data (outside of your study area) to avoid
this problem.
>
> Also, interpolators generally describe local variability or global
> variability - not both.  The exceptions are geostatistics and
radial basis
> functions.
>
> Surfer has been a favorite interpolator package, but ESRI's
Geostatistical
> Analyst extension (in ArcGIS) is also very good.  Besides having
both
> radial basis functions and geostatistical functions - it provides
surface
> error analysis tools that produce both graphic and numeric
descriptors.
>
> ESRI has a free online course that covers this extension
> (http://campus.esri.com/campus/catalog/index.cfm?
CFID=17792502&CFTOKEN=22787
> 414  "Introduction to ArcGIS 9 (or 8) Geostatistical Analyst") that
will
> get you started.  Looks like this month's free online seminar
(offered 3
> times on Jan 26th) will also cover this extension
(http://campus.esri.com/).
>
> Good luck,
>
> Maribeth
>
> At 04:15 PM 1/10/2006 +0000, you wrote:
>
> >Hello members,
> >       I am using ArcView 3.2a (demo version) to generate contour
maps for
> > different physico chemical parameters of groundwater samples. The
> > contours are being generated by making use of the point
interpolation
> > method. While generating these maps from the database created, i
am
> > encountering this problem. The problem is, many of the contours
are
> > displaying negative values. There are no negative values in the
database
> > and moreover no field in the database is left blank. The minimum
value
> > for any of the parametes is zero. Eventhough for some of the
parameters
> > there are not even zero values, the negative contour values are
being
> > displayed.
> >       Any one knowing the solution for this problem is kindly
requested
> > to help me in this regard.
> >
> >   Thanks in advance
> >
> >   Tejaswi
>

Hiii,

If you have 3D Analysis extension for ArcView3.2a, you
can do it. Otherwise you should find a free GIS
software like  GRASS, SAGA GIS, etc…

First you have to create TIN model for each parameter
and from that you can create corresponding contours.

Good luck,

Hunu


--- Tejaswi <tejaswi_sh@...> wrote:

> Hello members,
>       I am using ArcView 3.2a (demo version) to
> generate contour maps for different physico chemical
> parameters of groundwater samples. The contours are
> being generated by making use of the point
> interpolation method. While generating these maps
> from the database created, i am encountering this
> problem. The problem is, many of the contours are
> displaying negative values. There are no negative
> values in the database and moreover no field in the
> database is left blank. The minimum value for any of
> the parametes is zero. Eventhough for some of the
> parameters there are not even zero values, the
> negative contour values are being displayed.
>       Any one knowing the solution for this problem
> is kindly requested to help me in this regard.
>
>   Thanks in advance
>
>   Tejaswi

Hi everybody

I request you help me to find a copy of this paper or its author .
Decision Support System for Flood Control Facility Planning Based on
Inundation Simulation and Flood Damage Estimation Using GIS

Masaru
Morita<http://scitation.aip.org/vsearch/servlet/VerityServlet?KEY=ASCERL&possibl\
e1=Morita%2C+Masaru&possible1zone=author&maxdisp=25&smode=strresults&aqs=true>
1 and Takayuki
Fukuda<http://scitation.aip.org/vsearch/servlet/VerityServlet?KEY=ASCERL&possibl\
e1=Fukuda%2C+Takayuki&possible1zone=author&maxdisp=25&smode=strresults&aqs=true>
2

1Department of Civil Engineering, Shibaura Institute of Technology, 3-9-14
Shibaura Minato-ku, Tokyo 108-8548, Japan

2Hydrology and Water Resources Engineering, Institute of Industrial Science,
University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan



Thank you


[Non-text portions of this message have been removed]

Tejaswi,

     There are many algorithms for interpolating data.  Some are "exact" (in
that they return the value of the input data) and some are "inexact".

     The Surfer (http://www.goldensoftware.com/) documentation provides this
list of exact and inexact interpolators...

Exact:
Inverse Distance to a Power (no smoothing function)
Kriging (no specified nugget effect)
Nearest Neighbor
Radial Basis Function (no R2 specified)
Modified Shepard's Method (no smoothing factor)
Triangulation with Linear Interpolation (TIN)
Natural Neighbor

Inexact:
Inverse Distance to a Power (with smoothing factor)
Kriging (with error nugget)
Polynomial Regression
Radial Basis Function (with R2 specified)
Modified Shepard's Method

Note... the ability to return input values may or may not be related to
surface accuracy.  To test accuracy, hold out (don't use) a few well
positioned data points and compare those values with their predicted
values.  All interpolators have problems at the edges of data sets, so be
sure to collect extra data (outside of your study area) to avoid this problem.

Also, interpolators generally describe local variability or global
variability - not both.  The exceptions are geostatistics and radial basis
functions.

Surfer has been a favorite interpolator package, but ESRI's Geostatistical
Analyst extension (in ArcGIS) is also very good.  Besides having both
radial basis functions and geostatistical functions - it provides surface
error analysis tools that produce both graphic and numeric descriptors.

ESRI has a free online course that covers this extension
(http://campus.esri.com/campus/catalog/index.cfm?CFID=17792502&CFTOKEN=22787
414  "Introduction to ArcGIS 9 (or 8) Geostatistical Analyst") that will
get you started.  Looks like this month's free online seminar (offered 3
times on Jan 26th) will also cover this extension (http://campus.esri.com/).

Good luck,

Maribeth

At 04:15 PM 1/10/2006 +0000, you wrote:

>Hello members,
>       I am using ArcView 3.2a (demo version) to generate contour maps for
> different physico chemical parameters of groundwater samples. The
> contours are being generated by making use of the point interpolation
> method. While generating these maps from the database created, i am
> encountering this problem. The problem is, many of the contours are
> displaying negative values. There are no negative values in the database
> and moreover no field in the database is left blank. The minimum value
> for any of the parametes is zero. Eventhough for some of the parameters
> there are not even zero values, the negative contour values are being
> displayed.
>       Any one knowing the solution for this problem is kindly requested
> to help me in this regard.
>
>   Thanks in advance
>
>   Tejaswi

Hello Tejaswi

   The problem is that the method that you are using doesn't fit for chemical
parameters, because those values could be from decimals to thousands. I Strongly
recommend you to use Krigging method, BUT using the appropiete variogram. The
best software could be SURFER or an Arcview extention for krigging (you can find
out in the internet).

   Regards

   Xavier COELLO-RUBIO
   UNESCO-IHE
   The Netherlands

Tejaswi <tejaswi_sh@...> wrote:
   Hello members,
       I am using ArcView 3.2a (demo version) to generate contour maps for
different physico chemical parameters of groundwater samples. The contours are
being generated by making use of the point interpolation method. While
generating these maps from the database created, i am encountering this problem.
The problem is, many of the contours are displaying negative values. There are
no negative values in the database and moreover no field in the database is left
blank. The minimum value for any of the parametes is zero. Eventhough for some
of the parameters there are not even zero values, the negative contour values
are being displayed.
       Any one knowing the solution for this problem is kindly requested to help
me in this regard.

   Thanks in advance

   Tejaswi

Dear Tejaswi:

Contouring is a "trend" analysis. While we accept interpolation using known
random points, we do not trust extrapolation, that is program calculating
values outside of domain with known values. You will notice that negative
values are generated in places where field values are missing or spacing
between field points with known values is too big. I have seen maps with
storage coefficients being either negative or more than 1.0; both values
clearly physically impossible. Same as getting negative values, you may
expect also "blown up" values to extremely high ranges.

You may solve the problem in several ways. One is to assign minimum and
maximum contour values to be plotted on the map. Of course, the minimum
values would be a positive number. The other method is to exclude the areas
that have no "positive value" points by cropping the map coverage. For
example, in Ground Water for Windows (GWW) package, you draw a closed area
(enclosing "positive values" points) and allow contours to be plotted only
within that area. In other words, you will not accept extrapolation. Still
another way is to experiment with several methods of solution (krieging,
polynomial, minimum curvature, etc.; see SURFER) and find the one that
produces better results. You may also modify "modeling" paramaters used for
gridding.

Hope this helps.

Jasminko Karanjac, PhD
Consultant Hydrogeologist & Professor (ret.)
karanjac@...
www.geocities.com/karanjac
+381-64-3110304

Hello members,
       I am using ArcView 3.2a (demo version) to generate contour maps for
different physico chemical parameters of groundwater samples. The contours are
being generated by making use of the point interpolation method. While
generating these maps from the database created, i am encountering this problem.
The problem is, many of the contours are displaying negative values. There are
no negative values in the database and moreover no field in the database is left
blank. The minimum value for any of the parametes is zero. Eventhough for some
of the parameters there are not even zero values, the negative contour values
are being displayed.
       Any one knowing the solution for this problem is kindly requested to help
me in this regard.

   Thanks in advance

   Tejaswi



---------------------------------
   Yahoo! Cars NEW - sell your car and browse thousands of new and used cars
online search now
---------------------------------


[Non-text portions of this message have been removed]

Dear Mr. Shabanlou
Hello
I think you can find some more information about the
requested paper in the following address:
http://www.pubs.asce.org/WWWdisplay.cgi?0204801
Best Wishes
--- shabanlou_s <saeid.shabanlou@...> wrote:

> Hi everybody
>
> I request you help me to find a copy of this paper
> or its author .
> Decision Support System for Flood Control Facility
> Planning Based on
> Inundation Simulation and Flood Damage Estimation
> Using GIS
>
> Masaru
>
Morita<http://scitation.aip.org/vsearch/servlet/VerityServlet?KEY=ASCERL&possibl\
e1=Morita%2C+Masaru&possible1zone=author&maxdisp=25&smode=strresults&aqs=true>
> 1 and Takayuki
>
Fukuda<http://scitation.aip.org/vsearch/servlet/VerityServlet?KEY=ASCERL&possibl\
e1=Fukuda%2C+Takayuki&possible1zone=author&maxdisp=25&smode=strresults&aqs=true>
> 2
>
> 1Department of Civil Engineering, Shibaura Institute
> of Technology, 3-9-14
> Shibaura Minato-ku, Tokyo 108-8548, Japan
>
> 2Hydrology and Water Resources Engineering,
> Institute of Industrial Science,
> University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo
> 153-8505, Japan
>
>
>
> Thank you
>
>
> [Non-text portions of this message have been
> removed]
>
>
>
>


Dr. S.H.R. Sadeghi
Ph.D., Soil & Water Conservation Engineering,
Head and Asst. Professor, Department of Watershed Management Engineering,
College of Natural Resources, Tarbiat Modares University,
Noor 46417, Mazandaran, Iran
Tel. +98 122 6253101-3, Fax +98 122 6253499
Alternate E-mail: sadeghi@..., shrsadeghi@...



__________________________________________
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Hi everybody

I request you help me to find a copy of this paper or its author .
Decision Support System for Flood Control Facility Planning Based on
Inundation Simulation and Flood Damage Estimation Using GIS

Masaru
Morita<http://scitation.aip.org/vsearch/servlet/VerityServlet?KEY=ASCERL&possibl\
e1=Morita%2C+Masaru&possible1zone=author&maxdisp=25&smode=strresults&aqs=true>
1 and Takayuki
Fukuda<http://scitation.aip.org/vsearch/servlet/VerityServlet?KEY=ASCERL&possibl\
e1=Fukuda%2C+Takayuki&possible1zone=author&maxdisp=25&smode=strresults&aqs=true>
2

1Department of Civil Engineering, Shibaura Institute of Technology, 3-9-14
Shibaura Minato-ku, Tokyo 108-8548, Japan

2Hydrology and Water Resources Engineering, Institute of Industrial Science,
University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan



Thank you


[Non-text portions of this message have been removed]

You are invited to visit the AQTESOLV Users Group at

http://groups.yahoo.com/group/AQTESOLV/

to find over 50 links to free hydrological software and calculators.

Please send a message to AQTESOLV-owner@yahoogroups.com if you would
like to contribute a software or calculator link to this list.

Many thanks,
Glenn

Join us for a three-day aquifer testing workshop in Miami, FL (Feb. 28
- Mar. 2, 2006)!  Visit http://www.midwestgeo.com/.

AQTESOLV: http://www.aqtesolv.com/
HydroSOLVE: http://www.hydrosolveinc.com/
Aquifer Test Forum: http://www.aquifertest.com/
AQTESOLV Users' Group: http://groups.yahoo.com/group/AQTESOLV/
Bookstore: http://www.aquifertest.com/forum/bookstore.htm

Dear All,

   Let's farewell to 2005 and welcome to 2006. I hope everybody had a
good progress and prosperity in 2005 and I wish more happiness, peace
and progress in 2006.

   Sincerely yours,

   Dr. Zyad Khamas
   Land Care Manager
   Simple Grow Pty. Ltd.
   Australia

Dear All,

   Let's farewell to 2005 and welcome to 2006. I hope everybody had a good
progress and prosperity in 2005 and I wish more happiness, peace and progress in
2006.

   Sincerely yours,
   Sangam




=============================================
Sangam Shrestha
c/o Dr. Futaba Kazama
Department of Ecosocial System Engineering
Interdisciplinary Graduate School of Medicine and Engineering
University of Yamanashi
4-3-11, Takeda, Kofu, Yamanashi, 400-8511
Japan




---------------------------------
  Yahoo! DSL Something to write home about. Just $16.99/mo. or less

[Non-text portions of this message have been removed]

Dear members

   I am presently working with rainfall and groundwater level data. Using SPSS (v
13), I did auto-correlation and cross-correlation for water level and rainfall
data.

   I like to clarify the output of this analysis.

   Data details

   Water level – Monthly data from 1984 to 2003
   Rainfall      -  Monthly data from 1984 to 2003.

   1) I got an output with a warning “ Some of the missing cases are imbedded
within the series”. I think it may be due to missing values in the water level
data series.

   Will it affect the result?

   CROSS-CORRELATION

   2) In SPSS, I had selected the rainfall as a first variable (for Input) and
water level as a second variable (for Output). I like to give the rainfall data
as input and water level data as output.

   Is it right?

   3) In the Cross-correlation curve, highest correlation value (CCF , Max) is
observed with negative lag.

   How to explain this?

   4) In some wells, highest correlation value is not observed as a single point
(one lag) in cross-correlation curve, but it is observed in multiple point
(multiple lag. Eg. 0.2 is observed at 10 lag, 22 lag, etc.).

   5) Also, the cross-correlation value (CCF) is less than 0.2. Is it 
acceptable?

   Can anyone help me to solve this problem?

   Thanks in advance

   Yours sincerely
   Rajmohan






__________________________________________________
Do You Yahoo!?
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[Non-text portions of this message have been removed]

After much head scratching (and some sleep), I determined the problem
was the divider node acting as a normal junction under dynamic routing.
Switching to kinematic routing solved the problem, but produced other
problems elsewhere in the model. I switch from a divider node to a
combination of junction node and downstream weir link (transverse). This
seems to function properly. To develop the parameters for the transverse
weir, I fit values from a spreadsheet set up for different
slope/flow/length combinations. A longitudinal road slope of 0.003ft/ft,
uniform cross-slope of 0.02ft/ft, and nondepressed curb opening length
of 2.0ft, produced a weir coefficient (Cw) of 6.64 and weir length (L)
of 0.72ft for Q=Cw*L*(d^(5/3)). Holding Cw at 3.0 (typical suggested
value for this general shape) produced a weir length of 1.6ft. Other
weir types were tried (side flow, triangular, trapezoidal), but the
transverse produced the best fit - which was pretty good.

Thanks!

--
Thomas S Blue PE PLS
Principal
BLUE: Land, Water, Infrastructure
tsblue@... www.blwi.com



Thomas S Blue PE PLS wrote:

> I'm trying to model flow into and bypassing curb inlets/openings along
> a roadway using SWMM (Build 5.0.006a). I am using divider nodes and
> tabular data to split the flow between two links (into the inlet and
> down the street). The problem is that it doesn't matter which of the
> two downstream links I designate as the diverted link, the flow always
> transfers in the same manner to the two links. In other words,
> switching the "road" link with the "inlet" link produces the same
> results. The input file updates correctly per the GUI modified
> parameter changes. Any suggestions on this?
>
> Thanks very much in advance!
>
>--
>Thomas S Blue PE PLS
>Principal
>BLUE: Land, Water, Infrastructure
>tsblue@... www.blwi.com
>

I'm trying to model flow into and bypassing curb inlets/openings along a
roadway using SWMM (Build 5.0.006a). I am using divider nodes and
tabular data to split the flow between two links (into the inlet and
down the street). The problem is that it doesn't matter which of the two
downstream links I designate as the diverted link, the flow always
transfers in the same manner to the two links. In other words, switching
the "road" link with the "inlet" link produces the same results. The
input file updates correctly per the GUI modified parameter changes. Any
suggestions on this?

Thanks very much in advance!

--
Thomas S Blue PE PLS
Principal
BLUE: Land, Water, Infrastructure
tsblue@... www.blwi.com

Hello All,

   I want to initiate a discussion about riverine modeling using HECRAS.

   As most of the HECRAS users know, building and other obstructions are
placed in the model as ‘Blocked Obstructions’ along the respective
cross sections. My concern is, whether using the ‘blocked obstruction’
option on top of the Manning’s n (based on the Landuse/Land cover) would be
a right thing to do. It will be a conservative approach to use the
‘blocked obstruction’ in conjunction with manning’s n. As far as I know,
Manning’s n already considers the landuse (for example: residential) so
it already takes the obstructions from the landuse into account.

   Please share your thought on it with the group and let me know there
is a protocol on this issue, if any.

   Thanks
   Amit



[Non-text portions of this message have been removed]

Dear Friend

   You can find attched a 2 files dealing with the research that you have in your
hand.

   1- using that model you can have historical runoff data generation in daily
time step and less, inputs of the model are  rainfall and avererage EVP data
and..

   2-you can also have historical rainfall data generation in daily time step

3-neural network methodology (NNM) can be used as well as a black box type model
(not physically base).


with best wishes
   F.Sharifi


****************************************************
File attachments are not allowed in the group posts.
Moderator
****************************************************

Hi Alba:

You might try SWAT (soil and water assessment tool). Here's a link:
http://www.brc.tamus.edu/swat/index.html

Steve
Steven R. Potter
Blackland Research Center - TAES
808 East Blackland Road
Temple, Texas 76502
Tel: 254-774-6111
Fax: 254-770-6561

Alba, you may use
swrrbwq or hec-hms.. they did work pretty well for a
mountanious basin here in Ecuador.. we used just five years
for calibration.

Regards,
Remigio

----- Original Message -----
From: "corbalba" <corbalba@...>
To: <hydrologymodel@...>
Sent: Tuesday, December 13, 2005 11:21 AM
Subject: [hydrologymodel] rainfall-runoff model?


> Hi,
>
> I am a PhD student and I am trying to generate historical flow data
> from precipitacion data (1925-1955). I am looking for a model to
> generate diary flow data. Are there any that can work well?
>
> On the other hand, I have read about neural network methodology (NNM)
> but I don't know if it fits exactly on what I am looking for.
>
> Thank you very much.
>
> Yours faithfully
>
> Alba Solans

Try http://www.epa.gov/waterscience/basins/index.html for the EPA BASINS maodel.

Good luckR

Ron Kilmartin

corbalba wrote:
> Hi,
>
> I am a PhD student and I am trying to generate historical flow data
> from precipitacion data (1925-1955). I am looking for a model to
> generate diary flow data. Are there any that can work well?
>
> On the other hand, I have read about neural network methodology (NNM)
> but I don't know if it fits exactly on what I am looking for.
>
> Thank you very much.
>
> Yours faithfully
>
> Alba Solans

Hi,

I am a PhD student and I am trying to generate historical flow data
from precipitacion data (1925-1955). I am looking for a model to
generate diary flow data. Are there any that can work well?

On the other hand, I have read about neural network methodology (NNM)
but I don't know if it fits exactly on what I am looking for.

Thank you very much.

Yours faithfully

Alba Solans

hi,

   i am student of Anna University,Chennai.

   I am doing project in "solute transport modeling" using FEFLOW5.1

   Can anybody suggest me, how to go with multi species reactive transport
modeling....

   with regards
   Subbulakshmi



---------------------------------
  Yahoo! India Matrimony: Find your partner now.

[Non-text portions of this message have been removed]

The following references will be helpful to you:

   1. World Meteorological Organization (WMO) Hydrological Network Design, Needs,
Problems and Approaches, 1969.

   2. WMO, Guide to Hydrometeorological Practices, No. 168, 1970.

   3. WMO, Guide to Meteorological Instruments and observing practices, No. 8,
TP, 1961.

   Engr. Hamza Farooq Gabriel,
   Assistant Professor,
   NIT/MCE,
   National University of Sciences & Technology (NUST)
   Risalpur Campus,
   Risalpur Cantt., Pakistan

priyantha <hunukubura@...> wrote:

Dear All,

I need to install rain gauge network for one experimental basin. I
found some guideline in standard textbooks but couldn't be able to
find detail documents on rainfall network design. I would be grateful
if you could send me some references or papers related to rainfall
gauge network design.

Thanking you

Priyantha

Dear All,
I need to install rain gauge network for one experimental basin. I
found some guideline in standard textbooks but couldn't be able to
find detail documents on rainfall network design. I would be grateful
if you could send me some references or papers related to rainfall
gauge network design.

Thanking you

Priyantha

Dear colleague

We have spent the summer putting together a freely available web
site for evaluating hydrological models.

The site that can be used by hydrologists and other scientists to
evaluate their models using a wide range of statistical tests and
consistent measures of model performance.  At present there is a
general lack of consistency in the way that hydrological models are
assessed, which makes comparison between studies difficult. The
HydroTest web site is intended to provide a set of benchmark
statistical tests to promote future transparency and consistency
between reported studies.  In addition, the site will act as a forum
to encourage further discussion, debate and development of
performance measures and benchmark data.

You can access the site at:

www.hydrotest.org.uk

Please use it!

Regards

Chris Dawson
Bob Abrahart
Linda See

Dear hydrologymodelers!

    I am hydrologist and working in St.-Petersburg, Russia.
    I look for hydrologist concern with river bed,
   calculating bedload transport, transporting capacity and it
   depending of river channel pattern types.
    I will be very glad to talk about it topics.

    With best wishes for you
Alexander Condratyev
ancondratyev@...
http://bedload.boom.ru

Dear Members


I am working with water level and rainfall data to understand the longterm
trend.

I wish to know, How to do the auto correlation for water level data?

Also, How to do the cross correlation between water level and rainfall?

Is it possible in Microsoft Excel or SPSS?

Can anyone help me?

Thanks in advance.

Yours sincerely
N.Rajmohan



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[Non-text portions of this message have been removed]

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natural and human systems; managing and adapting to climate change and
climate variability; and policy-making under uncertainty; among others.
At the end of twelve intensive months of study, graduates are prepared
to obtain positions in government, business, nongovernmental
organizations and teaching while others choose to continue their
academic careers in the social or natural sciences.

For more information on the Masters Program in Climate Science and
Policy, please see http://www.columbia.edu/cu/climatesociety/ or contact
climatesociety@....  Applications can be completed on line.
We welcome application from students and mid-career professionals from
all fields.

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About the IRI
The International Research Institute for Climate Prediction (IRI), a
unit of the Earth Institute at Columbia, is a unique resource for the
Program in Climate Science and Policy. The core mission of IRI is to
enhance society's ability to understand, anticipate and manage the
impacts of seasonal climate fluctuations, especially in developing
countries. The IRI's work is rooted in climate prediction science, with
a focus on climate-related social and environmental issues. The IRI's
current research locations include Latin America, Sub-Saharan Africa,
and South and South East Asia. For more information please see
http://iri.ldeo.columbia.edu/.

About the Earth Institute
The Earth Institute at Columbia University is a leading academic center
for the integrated study of Earth, its environment, and society. The
Earth Institute builds upon excellence in core disciplines-earth
sciences, biological sciences, engineering sciences, social sciences and
health sciences-and stresses cross-disciplinary approaches to complex
problems. Through its research training and global partnerships, it
mobilizes science and technology to advance sustainable development,
while placing special emphasis on the needs of the world's poor. For
more information please see http://www.earthinstitute.columbia.edu/.

Job Description:

Individual will use hydrologic and hydraulic modeling in support of
floodplain mapping studies and watershed master planning and assist
water resources team in project execution, including but not limited
to, model development, interpretation of results, preparation of
reports, cost estimates, and preliminary and final construction plans.

Position requires a BS degree in Civil or Environmental Engineering
(or related discipline), 4 to 6 years of directly related experience,
PE registration in NC, solid H & H modeling capabilities using HEC
Series, HEC-RAS, and SWMM, GIS ArcView proficiency, and excellent
communication skills, including presentation and technical writing skills.


more info at http://www.careertrader.com

Description:
HYDROLOGIST - Well established Comm/Ind/Res Land Development
engineering company seeking hydrologist with 5-15 years experience.
License desired but NOT REQUIRED. Immediate, permanent position. San
Bernadino County company offers top notch working conditions,
excellent salary, outstanding benefits, and stock ownership.



more info at http://www.careertrader.com