DHI
A newsletter on water, environment & health No. 2 2007

Boulder Creek Applies Innovative Flood Modelling Approach for Emergency Response Planning

Purpose of Modelling

Predicting inundated areas and response time is critical for planning emergency response in the case of flash flooding. To this end, the Urban Drainage and Flood Control District, in conjunction with the City of Boulder and DHI Water & Environment prepared a 2-dimensional (2D) model of overland flooding in the Boulder Creek drainage basin using the MIKE 21 modelling software developed by DHI Water & Environment. A 2D model was chosen for the ease of development and results presentation capabilities. "A 2D model can be developed rapidly and with much less effort than a 1D model, given that appropriate topographic data is available." said Chad Kudym from UDFCD.

The objective of the modelling was to provide Urban Drainage and Flood Control District (UDFCD) with static inundation maps, travel times for the flood wave propagation and flood animations for Boulder Creek, based on MIKE 21 model results. The inundation maps and flood animations were used for illustrative purposes during an emergency preparedness exercise in Boulder, CO.

Approach

The project consisted of two main tasks, hydraulic modelling and result presentation. The model bathymetry was developed from existing USGS 10m DEM data while the model extents were developed based on delineation of the area of interest provided by UDFCD. The model domain extends from approximately half a mile upstream of Orodell to Canyon Park. This represents a stream channel length of approximately 10 miles. The model extents are shown in Figure 1 below. Six inflow locations and corresponding dynamic flood hydrographs were used. The flood flow hydrographs, and inflow locations were specified and provided by UDFCD.


Figure 1: Flood Model Extents

Based on the hydraulic modelling result files, flood hazard maps were prepared delineating the maximum flood depths based on the simulation results, and 2D animations of the flood inundation were prepared. These maps and animations were used to aid in developing and testing an emergency response plan.


Figure 2: Sample Flood Hazard Map

"The animations and prepared mapping were extremely useful in understanding the areas at risk to flood and the travel time of the front of the flood" said Chad Kudym.

Results

Mr. Kudym continues "Flood modelling for emergency response planning is quite different than flood mapping for insurance purposes. The main modelling goals for emergency response planning are a reasonable estimate of inundation areas and response times, while keeping the model development costs to a minimum. Using a 2D model precluded the need to spend a lot of man-hours developing model geometry, and defining flow paths and flow splits. All of these were taken directly from the specified topography. By using a tool like MIKE 21 we were able to quickly develop representative flood models for emergency response planning at low cost." For more information on this project, or to discuss how MIKE 21 can be applied to your flood modelling or emergency response planning needs,

For further details please contact Eric Fontenot, DHI Water & Environment (ejf@dhi.us).



Worldwide ^
DHI launches new technology for real-time dam optimization, South Africa ^

DHI launches new technology for real-time dam optimization

DHI has developed a new real-time dam optimization technology, which provides operators of dams and reservoirs with the unique opportunity to manage available water resources safely and efficiently. The new system is designed to optimize water resources systems in real-time, taking into account multiple - often conflicting – objectives.

Click here to read more.



Optimisation of groundwater well field pumps ^

Optimisation of groundwater well field pumps

Pump scheduling at larger groundwater well fields is often based on experience and rather simplistic approaches. Hereby the water works is able to supply the amount requested by the consumers – but not at the lowest price possible.

Click here to read more.



Climate change impacts in Danish rivers ^

Climate change impacts in Danish rivers


Photo: Hans Thodsen

During the last 4 years the Danish research project CONWOY has examined the influence of climate changes on the aquatic environment including river systems and the transport of nutrients. The MIKE 11 Rainfall-Runoff module (RR or NAM ) has been used in combination with empirical models in examining the influence of changed hydrological patterns on the transport of diffuse nitrogen and phosphorus. The empirical models distinguish between if the river flow origins from surface-near surface flow or base flow. The HIRHAM regional climate model, projects wetter winter and dryer summers for Denmark in a future climate scenario period 2071-2100 compared to the period 1961-2000. This results in larger amounts of winter surface-near surface runoff in the future scenario period. As the top soils are enriched with nutrients the surface-near surface runoff holds higher nutrient concentrations than the base flow, the river nutrient concentrations are therefore shown to increase up to 50% during winter months, and up to 20% on the mean annual scale.



WASY ^

WASY

DHI has acquired all the shares of WASY GmbH, Institute for Water Resources Planning and Systems Research, Germany .

WASY GmbH is undisputedly one of the global leaders within groundwater software and information systems. WASY is the producer of state-of-the-art groundwater software products, including FEFLOW, the leading finite element groundwater modelling package in the world. With this merger, DHI is strengthening its product family, expertise and activities particularly within the groundwater field worldwide and adding about 50 highly competent professionals to the staff

Click here to read more.



DHI Women's Water Fund - advancing career opportunities in water management ^

DHI Women's Water Fund - advancing career opportunities in water management

The DHI Women's Water Fund has been created as an initiative benefiting from the “King Hassan II Great World Water Prize” presented to Prof. Torkil Jønch Clausen of DHI at the Fourth World Water Forum in Mexico in 2006. The objective of the DHI Women's Water Fund is to support women in developing countries in advancing their career opportunities in the development and management of water resources.

The first call for applications earlier this year yielded a number of highly qualified candidates. In the selection process the Board gave priority to applicants with some years of practical experience in water resources management, rather than applicants with mainly academic or strictly technical backgrounds. The Board also prioritized applicants with a current leadership or management position in government, NGO or private sector with a potential to develop further in this role through support to career development.

Based on the above criteria the Board decided to award five grants to women from Iran , India and Armenia .

Next call for applicants is expected early 2008.

For further information please contact Ms. Winnie Thrane (wwt@dhigroup.com)



REACH has come into force ^

REACH has come into force

From Friday 1 June 2007 EU's new chemical legislation, REACH, applies in all of EU. The regulation is available on EU's website.

Click here to read more.



DHI has won a contract with the ESA funded MarCoast Project ^

DHI has won a contract with the ESA funded MarCoast Project

MarCoast (Marine & Coastal Environmental Information Services) is a three year GMES (Global Monitoring for Environment and Security) project funded by the European Space Agency (ESA) with the aim of establishing a durable network of marine and coastal information services.

Click here to read more.



Courses ^

DHI Water & Environment Sets Increased Focus on Training, Capacity and Institution Building - Courses Around the Globe!

For a number of years DHI Water & Environment and its international subsidiaries have offered a variety of courses worldwide within water and environment. The courses range from short and intensive standard software and vocational training courses to dedicated, specialised training matching individual clients' specific needs and requests.

Our training activities aim to

  • Make state-of-the-art technology easy to understand
  • Combine advanced theoretical knowledge with practical experience
  • Provide practical skills for problem solving

Alone in 2006 more than 150 standard software courses were held internationally in, amongst others, Australia, Bangladesh, Czech Republic, Denmark, France, Germany, India, Italy, Japan, Malaysia, New Zealand, Norway, People's Republic of China, Poland, Singapore, Spain, Sweden, Thailand, United Arab Emirates, the United Kingdom and USA. Course participants included significant representatives from governmental bodies, regional and local water bodies, research institutions and universities, professional bodies and engineering companies, harbour and coastal authorities, urban water utilities internationally. The "International Software Course Calendar" offers already now more than 200 courses to be run by our international offices in 2007.

We trust and believe that our focus on training and capacity building contribute to the sustainable development of water bodies worldwide and the development of more socially and environmentally sustainable water management strategies and global partnerships.

For further information on DHI Water & Environment course and training activities please contact DHI International Course Secretariat (courses@dhigroup.com) or consult our websites:

Vocational training:
http://www.dhigroup.com/Consulting/VocationalTraining.aspx

Software training:
http://www.dhigroup.com/Software/Training.aspx



Contact ^
Contact - Europe ^

Denmark - Corporate HQ
DHI Water • Environment • Health
Agern Alle 5
2970 Hørsholm, Denmark
Tel: +45 4516 9200
dhi@dhigroup.com
www.dhigroup.com
Denmark - Århus
Science Park
Gustav Wiedsvej 10
8000 Aarhus C, Denmark
Tel: +45 8620 5100
jdn@dhi.dk
www.dhi.dk
Denmark GRAS
Geographic Resource Analysis & Science A/S
c/o Institute of Geography
University of Copenhagen
Øster Voldgade 10
DK-1350 Copenhagen K, Denmark
Tel: +45 3532 2578
gras@ku.dk
www.gras.ku.dk
Bulgaria
DHI Bulgaria Ltd.
h.e. "Suhata reka"
bl. 103, entr. B, floor 1, app. 27
1517 Sofia, Bulgaria
Tel: +359 2 9 454 078
v.bojkov@dhi.cz
www.dhi.cz
Czech Republic
DHI Hydroinform a.s.
Na Vrsich 5
100 00 Praha 10, Strasnice,
Czech Republic
Tel: +420 267 227 111
office@dhi.cz
www.dhi.cz
France
DHI Eau & Environnement s.a.r.l.
1, Rue Duguesclin
F-44000 Nantes, France
Tel: +33 2 4048 4040
dhi@dhi.fr
www.dhi.fr
Germany
DHI Wasser & Umwelt GmbH
Wiesenstraße 10a
D-28857 Syke, Germany
Tel: +49 (0)4242 16380
dhi@dhi-umwelt.de
www.dhi-umwelt.de
Italy
Intecno-DHI
Via Pomba 23
I-10123 Torino, Italy
Tel: +39 011 56 24 649
Intecno-dhi@intecno-dhi.it
www.intecno-dhi.it
Norway
DHI Water & Environment AS
Abels Gate 5
N-7030 Trondheim, Norway
Tel: +47 7354 0364
dhi@dhi.no
www.dhi.no
Poland
DHI Polska Sp. z o.o.
Ul. Dubois 9
00-182 Warszawa, Poland
Tel: +48 226 359 332
dhipolska@dhigroup.com
www.dhi.pl
Slovak Republic
DHI Slovakia s.r.o.
Hattalova 12
831 03 Bratislava, Slovakia
Tel: +421 2 4444 2760
office@dhi.sk
www.dhi.sk
Spain/Portugal
DHI España
C/Ventura Rodriguez, 8, 1 dcha.
E-28036 Madrid, Spain
Tel: +34 91 323 5020
dhi@dhi.es
www.dhi.es
Sweden
DHI Water & Environment AB
Lilla Bommen 1
S-411 04 Göteborg, Sweden
Tel: +46 3180 8790
info@dhi.se
www.dhi.se


Contact - Americas ^

Brazil
DHI Water & Environment
Caixa Postal 1741
Curitiba, PR,
Brazil 80011-970
Tel: (+55 41) 352 79 67 (from outside Brazil)
Tel: (+carrier+41) 352 79 76 (in Brazil)
ael@dhigroup.com
Canada - Cambridge, ON - Software Sales
DHI Water & Environment ULC
150 Main Street - Ste 303
Cambridge, ON N1R 6P9
Canada
Tel: +1 519 650 4545
Fax: +1 215 504 8498
sales@dhi.us
USA - Boise, ID
DHI Water & Environment
101 University Ave
c/o University of Idaho - Boise
College of Engineering
322 East Front Street, Suite 340
Boise, Idaho 83702
Tel: +1 208 364 4993
Fax: +1 208 364 3160
USA - Oakland, CA
DHI Water & Environment
1440 Broadway Suite 614
Oakland, CA 94612
Tel: +1 503 827 5900 info@dhi.us
www.dhi.us
USA - Philadelphia, PA
DHI Water & Environment
PO Box 1029
Morrisville PA 19067-1029
Tel: +1 215 504 8497
Tel: +1 215 371 3969
Fax: +1 215 504 8498
support@dhi.us
www.dhi.us
USA - Portland, OR - US HQ
DHI Water & Environment
319 SW Washington Street Suite 614
Portland, OR 97204
Tel: +1 503 827 5900
dhi-or@dhi.us
www.dhi.us
USA – San Diego, CA
DHI Water & Environment
577 Second Street
Encinitas, CA 92024
Tel: +1 760 942 9626
Fax: +1 775 796 1879
drk@dhi.us
www.dhi.us
USA - Tampa, FL
DHI Water & Environment
2909 W. Bay to Bay Blvd. Suite 206
Tampa, FL 33629
Tel: +1 813 831 4700
Fax: +1 813 831 4774
dhi-fl@dhi.us
www.dhi.us


Contact - Asia-Pacific ^

Australia
DHI Water & Environment Pty Ltd
Suite 204, 781 Pacific Highway
Chatswood NSW 2067,
Australia
Tel: +61 2 844 05700
nsw@dhigroup.com
www.dhigroup.com
China
DHI China
5th Floor, 303 Xiao Muqiao Road
Shanghai 200032, China
Tel: +86 21 6417 8810
Fax: +86 21 6417 5882
lqm@dhigroup.com
www.dhi-cn.com
India
DHI (India) Water • Environment • Health
B-220, Lower Ground Floor
C. R. Park, (Outer Ring Road)
New Delhi 11 00 19
India
Tel: +91 11 2627 2275
ajay@dhi.co.in
www.dhigroup.com
Japan
DHI (Japan) Water & Environment
Urban building 6F
Kanagawa-ku Nishikanagawa 1-13-12
Yokahama City, Kanagawa-ken
221-0822 Japan
Tel: +81 (0)45 317 4105
Fax: +81 (0)45 410 0796
software@dhisoftware.jp
www.dhisoftware.jp
Malaysia
DHI Water & Environment (M) S/B
11th Floor, Wisma Perindustrian,
Jalan Istiadat, Likas
88400 Koa Kinabalu, Sabah,
Malaysia
Tel: +60 88 260 780
dhi@dhi.com.my
www.dhi.com.my
New Zealand
DHI Water & Environment Ltd.
PO Box 300-705
#102 E Centre
Oaklands Rd.
Albany
New Zealand
Tel: +64 9 912 9638
Fax: +64 9 912 9639
nz@dhigroup.com
www.dhigroup.com
Singapore
DHI Water & Environment (S) Pte. Ltd.
3 International Business Park
#06-19, Nordic European Centre
Singapore 609927
Tel: +65 6899 3557
dhi@dhi.com.sg
www.dhi.com.sg
Thailand
DHI Water & Environment
P.O.Box
Klong Luang, Pathumthani, 12120
Thailand
Tel: +66 2 524 5564
may@dhigroup.com
www.dhigroup.com
Vietnam
DHI Water & Environment
Tel: + 84 918 838 580
tth@dhigroup.com


Contact - Africa & Middle East ^

United Arab Emirates
DHI Gulf
P.O. Box 502221
Dubai, U.A.E
Tel: +971 4 360 2873
Fax: +971 4 363 1945
dhigulf@dhigroup.com
www.dhigulf.com


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