Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Measuring river surface flow with image analysis


Fujita Ichiro, a Professor at the Graduate School of Engineering in Kobe University, has developed a piece of software that can measure the flow rate of rivers using image analysis. The software is called KU-STIV (Kobe University Space-Time Image Velocimetry). This technology makes it easier to obtain accurate data about river flow rates that can be used in strategies for flood risk management.

Japan is hit by flood-related disasters almost every year - one of the most recent examples occurred in September 2015 when the Kinugawa River collapsed its banks, sending a wall of water into the nearby town of Joso. Accurate data for rainfall and river flow rate are vital elements in creating flood risk management strategies.

A screenshot of the English-language version of the KU-STIV system, used to measure river flow rate.

Credit: Kobe University

Thanks to developments in radar technology, rainfall measurements have become highly precise. However, measuring the flow rate of rivers is still carried out using the old-fashioned method of dropping a stick-shaped float in the river and estimating the flow rate from the float's speed through a section of the river.

When extreme flooding occurs this method becomes difficult to conduct due to the dangers involved, and there are a growing number of cases in which flow rates cannot be measured at the peak of a flood.

The KU-STIV system developed by Professor Fujita uses video footage taken from cameras and drones to measure the river flow rate. The system superimposes "searching lines" (each between 10 and 20 meters long) on footage of the river as measurement standards.

It calculates the flow speed from the time it takes water surface features and floating matter on the surface of the river to cross these lines, then analyses distribution to indirectly calculate the river flow rate.

Surface flow measurements taken using this system were very similar to those taken using acoustic current meters (ADCPs) and it can be used to measure river flow rates faster and more safely than the established method.

KU-STIV has already been adopted by many river consultants and River Offices in Japan's Ministry of Land, Infrastructure, Transport and Tourism, and organizations in Hyogo Prefecture have begun adapting the system for river observation cameras.

An English-language version of the system is also available, and recently Ghana researchers invited by the Japan International Cooperation Agency (JICA) are being trained to use the technology.

"We are aiming to adapt this system for real-time calculations, and at the same time we want to establish this as the standard method for measuring river flow rate both within Japan and overseas" commented Professor Fujita.

Eleanor Wyllie | EurekAlert!

More articles from Earth Sciences:

nachricht Mat baits, hooks and destroys pollutants in water
22.03.2018 | Rice University

nachricht Jacobs University supports new mapping of Mars, Mercury and the Moon
22.03.2018 | Jacobs University Bremen gGmbH

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Researchers Discover New Anti-Cancer Protein

An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.

The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...

Im Focus: Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1

In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.

Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...

Im Focus: Alliance „OLED Licht Forum“ – Key partner for OLED lighting solutions

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.

They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

Im Focus: Tiny implants for cells are functional in vivo

For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.

In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

Latest News

Custom sequences for polymers using visible light

22.03.2018 | Materials Sciences

Scientists develop tiny tooth-mounted sensors that can track what you eat

22.03.2018 | Health and Medicine

Mat baits, hooks and destroys pollutants in water

22.03.2018 | Earth Sciences

Science & Research
Overview of more VideoLinks >>>