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  • The Intelligent Digital Watershed – IIHR – Hydroscience & Engineering – University of Iowa
    graduate student Sudipta Mishra played an important role in building the intelligent digital watershed Mishra who is from India says the work builds on his previous experience in the hydrological processes in agriculturally dominated watersheds We try to understand the links between shifts in land use soil conservation practices and the resulting water quantity and quality Mishra explains He appreciates the multidisciplinary approach the project requires Working with people from other disciplines ranging from economics to social science and computer science is really exciting Understanding their perspectives is often challenging too Mishra adds I have learned many valuable lessons on how to work in a multidisciplinary team through this work Collaborator Andrew Kusiak professor of mechanical and industrial engineering leads the UI Intelligent Systems Laboratory His team has been able to make use of the data assembled for the intelligent digital watershed project using data mining techniques Collaboration is worth the minor inconveniences of getting familiar with a new research domain that could produce immeasurable benefits Kusiak says Collaboration is a discovery enabler and a research progress accelerator Learning from each other is one of the key concepts underpinning this effort Schnoor hopes that the intelligent digital watershed helps us understand the balance between economic and environmental goals in a truly useful way That is our goal he says People make decisions based on information We are trying to provide farmers with better information on the effects of their decisions on water quality and their income Using this information they may choose to modify their behavior depending on how they value the trade offs Learning from Each Other IIHR graduate student Sudipta Mishra played an important role in building the intelligent digital watershed Mishra who is from India says the work builds on his previous experience in the hydrological processes in agriculturally dominated watersheds We try to understand the links between shifts in land use soil conservation practices and the resulting water quantity and quality Mishra explains He appreciates the multidisciplinary approach the project requires Working with people from other disciplines ranging from economics to social science and computer science is really exciting Understanding their perspectives is often challenging too Mishra adds I have learned many valuable lessons on how to work in a multidisciplinary team through this work Collaborator Andrew Kusiak professor of mechanical and industrial engineering leads the UI Intelligent Systems Laboratory His team has been able to make use of the data assembled for the intelligent digital watershed project using data mining techniques Collaboration is worth the minor inconveniences of getting familiar with a new research domain that could produce immeasurable benefits Kusiak says Collaboration is a discovery enabler and a research progress accelerator Learning from each other is one of the key concepts underpinning this effort Schnoor hopes that the intelligent digital watershed helps us understand the balance between economic and environmental goals in a truly useful way That is our goal he says People make decisions based on information We are trying to provide farmers

    Original URL path: http://www.iihr.uiowa.edu/research/watershed-processes/the-intelligent-digital-watershed/ (2015-11-11)
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  • Improving Iowa’s Winter Road Conditions – IIHR – Hydroscience & Engineering – University of Iowa
    plants and water quality In the Chicago area the Illinois EPA refused to grant permission for a new freeway near the O Hare Airport until the toll road authority took steps to reduce chloride use With Nixon s help Illinois is now starting to use less salt on its roadways The Iowa DOT has been prudent about salt application Nixon says and consequently Iowa hasn t seen the same level of chloride contamination as Illinois Snow in the South Changing weather patterns due to climate change have made the job of winter road maintenance a lot harder Nixon says For example two winter storms struck Atlanta last winter an area that has rarely had to deal with serious winter weather The first storm dropped less than three inches of snow but nonetheless wrought disastrous results and left thousands of people stranded on the freeway at work or at school Nixon says authorities knew the storm was coming and should have taken steps to prepare sooner than they did When the next storm arrived Atlanta authorities basically shut the city down No one went anywhere Better perhaps than the first scenario but Nixon says that each storm cost the region at least a half a billion dollars in lost economic activity If Georgia keeps on getting these sorts of storms Nixon says officials there can t afford to continue dealing with them this way Was last winter an anomaly or is it the new normal No one can say for sure For a city like Atlanta it s a huge problem Nixon says Can the area afford to take an economic hit like that again and again Should officials invest in costly fleets of snowplow trucks Atlanta and other cities need to conduct a risk analysis Nixon says to study the issues that will likely affect their future Iowa DOT Improves Winter Driving Nixon has engaged in a very productive partnership with the Iowa DOT that has lasted more than 20 years Nixon says he is impressed with a set of charts developed by DOT snowplow operators that are now found in the cab of every Iowa DOT snowplow Drivers use the charts to determine how much salt to apply given the pavement temperature the type of winter storm and other variables Using these guidelines the Iowa DOT has been able to significantly reduce the amount of salt used Other agencies around the country have also begun to follow the guidelines Another very proactive move by the Iowa DOT Nixon says was the installation of GPS in all their trucks I thought it was just brilliant he says During winter storms GPS data from the trucks is available on the web Iowans can see where the trucks are how fast they re going and what they re doing are they putting down salt Is the plow up or down About 400 of the DOT s 1 000 trucks will also have cameras that will send an image about every five minutes

    Original URL path: http://www.iihr.uiowa.edu/research/other-research-initiatives/improving-iowas-winter-road-conditions/ (2015-11-11)
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  • Mitigating Corrosion of Steel Bridges – IIHR – Hydroscience & Engineering – University of Iowa
    huge difference to the weathering of steel bridge piers In the spring melting snow floods the roadways laced with salt left over from winter road treatments When vehicles go by they lift the brine high into the air and droplets land on bridge girders You know salt and steel not a good combination Eichinger says You get rust The Federal Highway Administration sponsored the research project to verify the agency s computer model Eichinger credits his students especially Riedinger for their excellent work collecting the data He thinks the sponsor will appreciate the results he and his team have gathered We ve got data that I think they will really like on the turbulent kinetic energy which is something that s missing in their model Students played a number of roles in the experiments Haowen Xu and Heng Wei David Tsai recorded the experiment with video cameras Brandon Willis helped analyze and interpret the data to generate the values needed to determine atmospheric stability and turbulent kinetic energy Riedinger says the results were somewhat surprising I never would have thought that speed was an issue She says that the results indicate a serious problem with corrosion of bridges from road salt One solution could be porous pavements which Riedinger says decrease the spray Riedinger says the research project was an intriguing one that allowed her to put her classroom skills to work in the field I love being involved with this project she says I m very glad that I had the opportunity to get involved in this project with Bill Tags Bill Eichinger bridges Federal Highway Administration LiDAR Michelle Riedinger students Last modified on July 2nd 2015 Posted on July 2nd 2015 Home About Greetings from the Director Fact Page IIHR at a Glance Where is IIHR Communications History IIHR s Historical Studies History Resources Hans Albert Einstein His Life as a Pioneering Engineer Sustainability at IIHR Evolving with the Times Intellectual Connections Worldwide IIHR Alumni Worldwide Archives Films by Hunter Rouse Employment Contact IIHR Webcam Education Graduate Program Admission Assistantships and Fellowships Graduate Student Opportunities Undergraduate Opportunities International Perspectives Service Projects Habitat for Humanity s Women Build Project Fluids Lab Meet Our Faculty and Staff Brandon Barquist Talking Shop Pablo Carrica Enjoying the Challenge George Constantinescu Rivers Run in the Family Carrie Davis Playing in the Mud Teresa Gaffey Transformations Anton Kruger How Stuff Works Troy Lyons Bridging the Gap Ricardo Mantilla Going with the Flow Jacob Odgaard Making an Impact Michelle Scherer Solving the Puzzle Fred Stern Revolutionizing Ship Hydrodynamics Stephanie Surine She s a Rocker Eric Tate Studying the Human Costs of Flooding H S Udaykumar The Reluctant Engineer Gabriele Villarini Working the Numbers Mark Wilson What s Not to Like Meet Our Students Tibebu Ayalew Accidental Engineer Ali Reza Firoozfar The Experimentalist Ruben Llamas Success among Friends Beda Luitel Finding a Way Kara Prior For the Love of Discovery Harvest Schroeder The Human Factor Stephanie Then Like a Duck to Water Meet Our Alumni Jim

    Original URL path: http://www.iihr.uiowa.edu/research/other-research-initiatives/mitigating-corrosion-of-steel-bridges/ (2015-11-11)
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  • Mussels Serve as Water-Quality Sensors – IIHR – Hydroscience & Engineering – University of Iowa
    diver who tests the sensors in the UI diving pool Jonathan Durst who helped design and build the mussel microhabitat Other students who designed enclosures for the electronics and ECE faculty Raghu Mudumbai and Soura Dasgupta and their students This team has developed a nice synergy Kruger says and students play an important part in the research Senior Hannah Taylor says she really likes being a part of the project although it s not always easy to explain to her friends When I say I put sensors on mussels they all think I mean muscles she says They look at me like I m insane Born Wire Free The backpack itself which Taylor designed contains all the electronics needed to make the measurements as well as a small radio but it is no bigger than a stack of quarters Researchers glue the backpack to the mussel s shell and release the animal back into the river No wires restrict the mussels movements The goal is to make the sensors so inexpensive that they could be disposable The backpack wearing mussels are currently still in a laboratory microhabitat with pumps to bring in fresh river water and lights to create artificial day night cycles Cameras track the mussels every move When the researchers are ready they will release the mussels back into the Iowa River where they can roam free The mussels chosen for the project are a large species known as pocketbook mussels We want a big mussel so the backpack doesn t impact them Kruger explains We don t want to take a baby and weigh it down The team has designed a study to determine whether or not the backpacks affect the mussels behavior So far the answer seems to be no although the study is ongoing The trickiest part of the equation is powering the sensors Most batteries would die within a year and researchers hope to gather data for five years or more Another plan was to use the movement of the water to power the electronics That too failed Mussels don t like fast moving water Kruger explains They like to stay where there s some water movement but not too much so that works against us The most promising idea uses ions in the river water itself to power the instruments Scientists place two dissimilar metals in the water which generate a small current that can be put to use Kruger says they initially planned to use copper and zinc two inexpensive and easily obtainable metals Luckily mussel expert Teresa Newton cautioned against the use of copper which is toxic to mussels She potentially saved the team considerable wasted effort Kruger says When you know just enough to get yourself into trouble then you talk to an expert he says Kruger says he is no expert but he does love his mussels I m quite fascinated by them he says Along with the rest of the team he is part of a longstanding tradition

    Original URL path: http://www.iihr.uiowa.edu/research/other-research-initiatives/mussels-serve-as-water-quality-sensors/ (2015-11-11)
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  • Self-Cleaning Culverts – IIHR – Hydroscience & Engineering – University of Iowa
    they developed a self cleaning design that proved its reliability and efficiency through an extensive series of tests Rounded segments or fillets are set on the stream bottom immediately upstream of the culvert The fillets slope toward the banks in an attempt to bring the culvert site back to its original shape By doing so the fillets direct the sediment through the central channel and restrict the extent of low velocity areas on the stream side that are prone to sedimentation while maintaining the effectiveness of the flow conveyance over a range of flows The Iowa DOT has implemented Muste s design as a culvert demonstration project on Highway 1 in Iowa City Before deploying the new design the team cleaned and monitored the culvert for two years in order to have baseline data for the demonstration They used an Iowa Flood Center stream stage sensor to provide real time data on water levels and a web camera to continuously record the culvert s operation Layers of sediment began to accumulate upstream from the two side channels almost immediately after it was cleaned Two years ago the culvert was cleaned again and the team installed the self cleaning retrofit The Iowa DOT and the city of Iowa City chose a new lining material for this purpose concrete cast using flexible fabric forms The revetment material consists of a mat filled with concrete which results in a web of narrow flat moldings and raised ridges on the stream floor just upstream of the culvert Muste s team continues to monitor the culvert with special attention to sedimentation Since the self cleaning design was implemented Muste s team has observed impressive improvement It is working very well Muste says After the deployment of the new design the sedimentation has almost disappeared We are very pleased to see that the culvert is now nearly squeaky clean Muste says The success of the new design has attracted the attention of the road hydraulics community and prompted an invitation for Muste to present a keynote lecture at the recent National Hydraulic Engineering Conference held in August 2014 in Iowa City Tags bridges flood Iowa City Iowa Department of Transportation Iowa DOT Iowa Flood Center Marian Muste National Hydraulic Engineering Conference Last modified on July 2nd 2015 Posted on July 2nd 2015 Home About Greetings from the Director Fact Page IIHR at a Glance Where is IIHR Communications History IIHR s Historical Studies History Resources Hans Albert Einstein His Life as a Pioneering Engineer Sustainability at IIHR Evolving with the Times Intellectual Connections Worldwide IIHR Alumni Worldwide Archives Films by Hunter Rouse Employment Contact IIHR Webcam Education Graduate Program Admission Assistantships and Fellowships Graduate Student Opportunities Undergraduate Opportunities International Perspectives Service Projects Habitat for Humanity s Women Build Project Fluids Lab Meet Our Faculty and Staff Brandon Barquist Talking Shop Pablo Carrica Enjoying the Challenge George Constantinescu Rivers Run in the Family Carrie Davis Playing in the Mud Teresa Gaffey Transformations Anton Kruger How Stuff Works

    Original URL path: http://www.iihr.uiowa.edu/research/other-research-initiatives/self-cleaning-culverts/ (2015-11-11)
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  • Unsteady Aerodynamics – IIHR – Hydroscience & Engineering – University of Iowa
    built like a tank Encased in steel and featuring interlocks on the doors it was impossible to just reach in and give the wing a whack to get it started Good luck was on their side however and the wing did eventually flutter This was really serendipitous Buchholz says We realized later that very small changes to the airfoil which we would normally consider to be inconsequential made the difference between the airfoil flutter self starting or not Several times we stood there watching hopefully and nothing happened Particle Image Velocimetry Buchholz is especially interested in the physics of the vortices that develop on the leading edge of the wing The formation and existence of these vortices result in very large aerodynamic forces which can seriously damage wings or wind turbines Using particle image velocimetry PIV they illuminated the flow around the model with a laser and took images of the micronscale droplets suspended in the flow He and Akkala observed a very large source of vorticity contributing to a secondary counterclockwise vortex that is generated behind the clockwise leading edge vortex They basically destroy each other Buchholz says One s rotating one way the other one s rotating the other way They mix and essentially cancel each other out We realized that very small changes to the airfoil made the difference between the airfoil flutter self starting or not Buchholz had already observed this secondary vorticity flux in his lab at the UI He says the major step forward from the summer work was the characterization of the equivalent phenomenon in the case of stall flutter a fairly different configuration which Buchholz says has given us important information about how ubiquitous the phenomenon is There are some differences from the flapping wing but also many key similarities which he says is good because it suggests similar behaviors in other applications as well Next they d like to try to control the flow using the unique observations they ve made of the flow itself We ve identified this generation of secondary vorticity which turns out to be very large Buchholz says Can we harness that somehow to regulate the strength of that dynamic stall vortex It s a new idea and one that merits further exploration Buchholz hopes to continue the work next summer back at the Air Force Academy The ultimate goal is to understand and better predict the phenomenon That s a lofty goal Buchholz says A lot of people have been working on that problem for a lot of years The Blue Angels put on a show for graduation at the Air Force Academy Tags aerodynamics Hydraulics Wind Tunnel Annex IIHR James Buchholz particle image velocimetry PIV U S Air Force Academy UI research Last modified on July 2nd 2015 Posted on June 22nd 2015 Home About Greetings from the Director Fact Page IIHR at a Glance Where is IIHR Communications History IIHR s Historical Studies History Resources Hans Albert Einstein His Life as a Pioneering Engineer

    Original URL path: http://www.iihr.uiowa.edu/research/other-research-initiatives/unsteady-aerodynamics/ (2015-11-11)
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  • Research Flumes – IIHR – Hydroscience & Engineering – University of Iowa
    IIHR Evolving with the Times Intellectual Connections Worldwide IIHR Alumni Worldwide Archives Films by Hunter Rouse Employment Contact IIHR Webcam Education Graduate Program Admission Assistantships and Fellowships Graduate Student Opportunities Undergraduate Opportunities International Perspectives Service Projects Habitat for Humanity s Women Build Project Fluids Lab Meet Our Faculty and Staff Brandon Barquist Talking Shop Pablo Carrica Enjoying the Challenge George Constantinescu Rivers Run in the Family Carrie Davis Playing in the Mud Teresa Gaffey Transformations Anton Kruger How Stuff Works Troy Lyons Bridging the Gap Ricardo Mantilla Going with the Flow Jacob Odgaard Making an Impact Michelle Scherer Solving the Puzzle Fred Stern Revolutionizing Ship Hydrodynamics Stephanie Surine She s a Rocker Eric Tate Studying the Human Costs of Flooding H S Udaykumar The Reluctant Engineer Gabriele Villarini Working the Numbers Mark Wilson What s Not to Like Meet Our Students Tibebu Ayalew Accidental Engineer Ali Reza Firoozfar The Experimentalist Ruben Llamas Success among Friends Beda Luitel Finding a Way Kara Prior For the Love of Discovery Harvest Schroeder The Human Factor Stephanie Then Like a Duck to Water Meet Our Alumni Jim Ashton Turnaround Guy Maria Laura Beninati The Iowa Embrace Paul Dierking The Inquisitive Engineer Scott Hagen Far from the Farm J V Loperfido Going with the Flow Student Organization SIIHR Contact Us Research The Iowa Nutrient Research Center Iowa Geological Survey The IGS Rock Library Water Sustainability Initiative Water Quality Everyone s Responsibility Water Communication A New Field The Human Costs of Flooding Biofluids Developing a Digital Lung The Dynamics of Heart Valves Metastatic Cancer Cells and Shear Stress Environmental Engineering Science PCBs A Disturbing Legacy and Ongoing Threat Aboard the Lake Guardian Plume Chasers Landfill Fire Sparks Research Fish Passage Taming Total Dissolved Gas Hydraulic Structures The IIHR Dropshaft Solution Modernizing London s Sewers Hydrometeorology LiDAR

    Original URL path: http://www.iihr.uiowa.edu/research/instrumentation-and-technology/research-flumes/ (2015-11-11)
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  • Ship Hydrodynamics Resources – IIHR – Hydroscience & Engineering – University of Iowa
    tracks the radio controlled ships using indoor global positioning and two camera vision shadowing the vesse4ls to within 100 mm A 3D particle image velocimetry system measures fluid velocities around the ships facilitating the collection of detailed flow data IIHR s wave basin is the first to include local flow measurement capabilities critical for continued development of simulation based design Click on any photo below to see a photo gallery Fixed model ship in the IIHR towing tank IIHR s towing tank is one of the world s most advanced Computer simulations at IIHR guide model scale physical experiments in the towing tank IIHR has been an important player in U S naval ship design since 1948 The towing tank is located in the basement of the C Maxwell Stanley Hydraulics Lab IIHR s new wave basin A model scale radio controlled ship sets sail in the wave basin The model scale ships are free moving and can maneuver like real ships The wave basin allows measurement of local flow around a free running model something that s never been done before The Tigerhawk on the wave basin s floor is the world s largest Making waves in the 40x20x30 meter wave basin The overhead carriage was custom built for IIHR s wave basin The six wavemakers can create a tempest in the wave basin IIHR Director Larry Weber left and IIHR Research Engineer Fred Stern look on as a model scale ship makes its way across the wave basin Fred Stern UI professor of mechanical and industrial engineering has been instrumental in developing the ship hydrodynamics program Tags IIHR naval research Stanley Hydraulics Lab UI facilities Wave Basin Last modified on June 25th 2015 Posted on February 3rd 2011 Home About Greetings from the Director Fact Page IIHR at a Glance Where is IIHR Communications History IIHR s Historical Studies History Resources Hans Albert Einstein His Life as a Pioneering Engineer Sustainability at IIHR Evolving with the Times Intellectual Connections Worldwide IIHR Alumni Worldwide Archives Films by Hunter Rouse Employment Contact IIHR Webcam Education Graduate Program Admission Assistantships and Fellowships Graduate Student Opportunities Undergraduate Opportunities International Perspectives Service Projects Habitat for Humanity s Women Build Project Fluids Lab Meet Our Faculty and Staff Brandon Barquist Talking Shop Pablo Carrica Enjoying the Challenge George Constantinescu Rivers Run in the Family Carrie Davis Playing in the Mud Teresa Gaffey Transformations Anton Kruger How Stuff Works Troy Lyons Bridging the Gap Ricardo Mantilla Going with the Flow Jacob Odgaard Making an Impact Michelle Scherer Solving the Puzzle Fred Stern Revolutionizing Ship Hydrodynamics Stephanie Surine She s a Rocker Eric Tate Studying the Human Costs of Flooding H S Udaykumar The Reluctant Engineer Gabriele Villarini Working the Numbers Mark Wilson What s Not to Like Meet Our Students Tibebu Ayalew Accidental Engineer Ali Reza Firoozfar The Experimentalist Ruben Llamas Success among Friends Beda Luitel Finding a Way Kara Prior For the Love of Discovery Harvest Schroeder The Human Factor Stephanie Then Like a

    Original URL path: http://www.iihr.uiowa.edu/research/instrumentation-and-technology/ship-hydrodynamics-resources/ (2015-11-11)
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