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.
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!
UCI and NASA document accelerated glacier melting in West Antarctica
26.10.2016 | University of California - Irvine
Ice shelf vibrations cause unusual waves in Antarctic atmosphere
25.10.2016 | American Geophysical Union
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
27.10.2016 | Materials Sciences
27.10.2016 | Physics and Astronomy
27.10.2016 | Life Sciences