京都大学教育研究振興財団助成事業
成 果 報 告 書
平成27年8月17日
公益財団法人京都大学教育研究振興財団会 長 辻井 昭 雄 様
所属部局・研究科：

工学研究科

職 名・学 年：

博士後期課程３年

氏

Bhattarai Pawan Kumar

名：助 成 の 種 類

平成２７年度 ・ 若手研究者在外研究支援 ・ 国際研究集会発表助成

研 究 集 会 名

36ｔｈ IAHR WORLD CONGRESS
第３６回国際水圏環境工学会世界大会

発 表 題 目

Study of Breach Characteristics and Scour Patternfor Overtopping Induced River Dyke Breach

開 催 場 所

デルフト・デンハーグ（オランダ）

渡 航 期 間平成27年6月28日

成 果 の 概 要～

平成27年7月5日

タイトルは「成果の概要／報告者名」として、A４版２０００字程度・和文で作成し、添付して下さい。 「成果の概要」以外に添付する資料 □ 無□ 有()
交付を受けた助成金額

350,000円

使 用 し た 助 成 金 額

350,000円

返納すべき助成金額

0円

会 計 報 告学会参加費

46,359円

オランダビザ申請料

38,520円

往復航空券代 144,240円
助 成 金 の 使 途 内 訳

関空－京都往復交通費7,200円オランダ国内交通費

7,580円

宿泊料(6日間） 78,101円
日当（8日間） 28,000円（今回の助成に対する感想、今後の助成に望むこと等お書き下さい。助成事業の参考にさせていただきます。）

当財団の助成について

成果の概要／Bhattarai Pawan Kumar

Report: 36th IAHR Congress Visit
Information about the event
Programme: 36th International Association for Hydro-Environment Engineering and Research(IAHR) congress
Place: The Hague, The Netherlands
Congress date: 28th June to 3rd JulyThe International Association for Hydro-Environment Engineering and Research (IAHR),
founded in 1935, is a worldwide independent organisation of engineers and water specialists
working in fields related to the hydro-environmental sciences and their practical application.
Activities range from river and maritime hydraulics to water resources development and ecohydraulics, through to ice engineering, hydro-informatics and continuing education andtraining. IAHR stimulates and promotes both research and its application, and by so doing
strives to contribute to sustainable development, the optimisation of world water resourcesmanagement and industrial flow processes.
The 36th IAHR World Congress provided special emphasis on cross-cutting themes related toDeltas of the Future, looking at what happens upstream, linking hydro-environment research
to engineering practice, and reaching out to the developing world. The themes of this congress
are managing deltas, Hydro-Environment, Sediment management and morphodynamics,
Water Engineering, Flood risk management and adaptation, Water resources and hydroinformatics and Extreme events, natural variability and climate change. Nearly 2000
participants were attended and around 1500 papers (oral and poster) were presented. My oralpresentation included my Ph.D. research topics related to river dyke breaching due toovertopping flow. The date of my presentation is 1st July 2015.
In this congress, I presented the numerical and experimental results related to investigation of
the dynamic lateral widening process, breach characteristics and scour process. The influenceof sediment size of dyke materials on the breach process were discussed based on the resultsof the laboratory experiments, and a numerical model was developed to simulate the breachprocess of dykes by flow overtopping. The developed model introduced the effects ofinfiltration process and resisting shear stress due to suction of unsaturated sediment as a newexpression. To simulate the dyke breach phenomenon, the numerical model consisted ofdifferent modules: two-dimensional shallow-water flow, seepage flow, sediment transport
using a deterministic model, and collapse model. The reproducibility of the developed model
was tested using experimental data on dyke breach phenomena. The numerical results arewell agreed with the results of the sandy river dyke experiments.

Apart from presentation, I also attended the half day technical excursion to The impressive
Maeslant Storm Surge Barrier. The excursion took us by bus to Flood Proof Holland, theunique test and demonstration facility for innovative temporary flood defenses and flood
prevention measures in Delft. We were able to see some of the latest innovations during a reallife flood simulation. At Flood Proof Holland, Dutch entrepreneurs were cooperating together
with public parties, staff and students of knowledge institutes (Delft University of Technology,etc) to find innovative and practical solutions that offer protection against the rising water. Thefacility was also used for testing and demonstration of other water management related
innovations as well. Over the last year, many national and international delegations and filmcrews (for example BBC and Discovery Channel) have visited the site.
Finally, in the congress, I had a very good discussion with the experts of my field and the future
aspects of my topics. Some of them gave insightful comments to improve the work. I also
attended the paper presentations of fellow professionals related to my topics from where I got
much information regarding improvement of results of my topics. I attended a variety ofpresentations and learnt more about areas of my discipline that were not researched in homedepartment. Many presentations inspired me with new ideas. All these experiences helped
feel as though I am an active, knowledgeable, and valuable member of my professional field.
Some Snaps during the programme: