Groundwater salinization and associated co-contamination risk increase severe drinking water vulnerabilities in the southwestern coast of Bangladesh
2020-01-02 Research Topics
Bangladesh is one of the most vulnerable deltas to climate change, sea level rise, inundation, and salt water intrusions. Freshwater salinization is becoming a serious threat to household water security among coastal communities. Our study found that groundwater is severely contaminated with salinity intrusions while co-contaminants were found to be in high concentrations compare with different drinking water standard values, which is completely unsuitable for drinking purposes. In Bangladesh, almost all the people used to drink groundwater as a principal source of water as well as household purposes. Now, it is a great concern to the future sustainable drinking water security and public health problems. Publication Rakib, M.A., Sasaki, J., …
Typhoon-1919 is approaching Kanto and Tokai Regions, Japan, on October 12, 2019. Real time tide observation data (storm surge anomalies) can be seen in Web of Japan Meteorological Agency (in Japanese). Real time tide observation data in and around Tokyo Bay are embedded in below (in Japanese): Tide Stations around Kanto and Tokai Regions At Tokyo by Japan Meteorological Agency At Keihin Port by Ports and Harbors Bureau, Ministry of Land, Infrastructure, Transport and Torism At Yokohama by Japan Coast Guard At Chiba by Japan Coast Guard At Mera by Japan Meteorological Agency At Yokosuka by Japan Coast Guard At Aburatsubo by Geographical Information Authority of Japan
2019-09-28 World Travel
Dr. Sasaki participated in International Conference on Asian and Pacific Coasts (APAC) 2019 in Hanoi, Vietnam, from September 26 to 28, 2019. From our lab, Mr. Endo (D3) presented our paper entitled “Mitigation of Anoxia and Hypoxia in Enclosed Shallow Fishing Grounds Using a Water Jet Generation Device.” We also enjoyed a lunch meeting with Dr. Cong (friend since the period at Yokohama National University (YNU)) and Mr. Thanh (former student and M. E. in 2016) as well as engineers at DHI. Dr. Laknath (Engineer at Lanka Hydraulic Institute (LHI) and former student during YNU period) was awarded the Best Paper Award in APAC 2019, entitled “Analysis of Cyclone Events …
2019-09-22 Lab activities
Graduation ceremony for September 2019 graduates was held on September 19. From our lab, one Ph.D. (First Ph.D. in our lab) and one master students. Congratulations!
2019-09-10 World Travel
Dr. Sasaki visited Yangon and Wunbaik Reserved Mangrove Forest, Yambye Township, Kyaukpyu district, Myanmar, from September 4 to 9, 2019. ItineraryCX509 NRT/HKG 9:15/13:10，KA254 HKG/RGN 14:20/16:10 and KA251 RGN/HKG 1:25/6:00，CX526 HKG/NRT 8:10/13:35. Immigration at Yangon International Airport There was no disembarkation card, just showing passport and return e-ticket. SIM card Telenor was recommended, 11,000 Kyat for 7GB. From Airport to Yangon Best Western Chinatown Hotel by taxi A taxi counter was located in front of the exit No. 6 of the airport. It cost 12,000 Kyat. It took around 2 hours because of traffic jam in the evening around 5 pm. Yangon downtown and Thilawa Special Economic Zone (SEZ) Dr. Sasaki …
2019-09-02 Lab activities
Annual field trip organized by Hydrosphere Group, Department of Civil Engineering, The University of Tokyo, was held from September 1 to 2, 2019. We visited the Sakawagawa River watershed and stayed at Yamanaka Lodge of UTokyo. In the evening seminar after the dinner, Wang and Parastoo presented their research from our lab.
A field visit in Ishigaki Island, Okinawa Prefecture, was performed from August 26 to 27 organized by a committee on coral reef restoration by Fisheries Agency. We visited Research Center for Subtropical Fisheries, Seikai National Fisheries Research Institute, Fisheries Research and Education Agency.
Hybrid methods combining atmospheric reanalysis data and a parametric typhoon model to hindcast storm surges in Tokyo Bay
2019-08-28 Research Topics
Reanalysis data and a parametric typhoon model formula are often used to prepare wind and pressure fields for storm surge hindcasting. However, their optimum selection and usage have not been well established. To enhance the accuracy of wind and pressure fields, two hybrid methods were proposed by applying a parametric typhoon model of Mitsuta–Fujii’s formula, which is determined from the typhoon center to a certain radius of Rb, and then switching to the reanalysis data of ERA-Interim in the outer region through the interpolated transition bandwidth of Wb. In hybrid model I, Rb and Wb were fixed because the time-varying radius of the maximum wind speed was determined by the …
2019-08-12 Research Topics
Dr. Sasaki delivered a keynote talk in the international symposium, iSymWater2019, held at Xijiao Hotel in Beijing, entitled “Sustainable Marine Environment and Coastal Disaster Mitigation in Tokyo Bay.” One of the organizers of this symposium is School of Environment, Beijing Normal University, with which Graduate School of Frontier Sciences, the University of Tokyo has concluded Memorandum of Understanding (MOU) since May, 2019. This symposium was also reported by China Daily.
2019-08-11 World Travel
Dr. Sasaki was dispatched to Can Tho University, Vietnam from August 6 to 11, 2019, by JICA. Itinerary was JL79 HND/SGN 1:25/5:15, JL70 SGN/HND 23:25/6:55+1. The university is located in a big city of Can Tho in Mekong Delta and traditionally famous in agriculture, fishery, and aquaculture. The university is expanding the field of environmental studies, including delta management.