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!
Sediment from Himalayas may have made 2004 Indian Ocean earthquake more severe
26.05.2017 | Oregon State University
Devils Hole: Ancient Traces of Climate History
24.05.2017 | Universität Innsbruck
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy