Special Issue on Expectations for Upgrading Dams Under Operation
Tetsuya Sumi, Makoto Nakatsugawa, and Yoshikazu Yamaguchi
Disaster Prevention Research Institute,
Goka-sho, Uji-shi, Kyoto, Japan
Muroran Institute of Technology
27-1 Mizumoto-cho, Muroran, Hokkaido,
Public Works Research Institute
1-6 Minamihara, Tsukuba, Ibaraki,
1. Introduction There are approximately 2,700 dams in Japan. Their total reservoir capacity is approximately 25 billion m3 (BCM), far less than the 34.4 BCM of Hoover Dam in the US or the 39.3 BCM of the Three Gorges Dam in China. Lake Biwa, with a capacity of 27.5 BCM, which has recently been used for multiple purposes by the Lake Biwa Comprehensive Development Project, is equivalent in scale to such artificial lakes. On the other hand, dams in Japan that were constructed on mountain rivers with considerable sediment deposits are decreasing their capacity more rapidly than those constructed on continental rivers, so they require measures against deposition to maintain their long-term reservoir capacity. In addition, extreme weather phenomena (increased rainfall and drought intensity) under climate changes increase high demand for storage capacity of dams. In order to effectively use these dams as limited resources and to hand them over to the next generation in healthy state, continuous investment and development of maintenance technology are required. Recently, to promote this investment and development, “A vision for upgrading dams (effective use of existing dams to mitigate damage from frequent floods and droughts and to generate renewable energy)” was established by the Ministry of Land, Infrastructure, Transport, and Tourism (MLIT) on June 27, 2017 . This special issue is collecting the significance of the dam upgrading projects and important challenges from various aspects to be implemented. for further details, please refer the pdf.
for further details please refer the pdf file.
-  The Ministry of Land, Infrastructure, Transport, and Tourism (MLIT), “A vision for Upgrading Dams (Effective Use of Existing Dams to Mitigate Damage from Frequent Floods and Droughts and to Generate Renewable Energy),” June 27, 2017, http://www.mlit.go.jp/common/001190127.pdf (inJapanese) [accessed July 18, 2018]
-  The Japan Society for Dam Engineers, “Report on Dam Reservoirs Issues Review Committee to Support the Mature Society of the Future, – Dam’s Challenge to Support the Next Hundred Years – (Planning, Operation and Management),” 2016 (in Japanese).
-  M. Kurahashi and T. Sumi, “A Study on the Sediment Management Measures for Maintaining Long-term Flood Mitigation Function of Dam Reservoir Group in the Same River Basin,” J. of Japan Society of Civil Engineers, Ser.B1 (Hydraulic Engineering), Vol.73, No.4, pp. I_361-I_366, 2017 (in Japanese).
-  T. Sumi, “Introduction to On-site Demonstrations of the Next-generation Robotic Technologies for Social Infrastructures, Organized by Advisory Committee on Underwater Structures’ Maintenance,” J. of the Robotics Society of Japan, Vol.34, No.8, pp. 7-12, 2016 (in Japanese).
-  T. Sumi and T. Okabayashi, “Asset Management of Dams; ‘Nagasaki Method,’ Innovative Retrofitting Project Based on the 1982 Nagasaki Flood,” JSCE Member’s Report, JSCE Magazine, Vol.100, No.3, pp. 54-57, 2015 (in Japanese).
-  M. Matsushita, “Clear Water Separation and Sediment Bypass of the Oldest Masonry Dam in Japan,” T. Sumi ed., Proc. of the 2nd Int. Workshop on Sediment Bypass Tunnels, paper FP1, Kyoto University, Japan, 2017.