Updated on 2022/10/20

写真a

 
NAGAYAMA Akio
 
Organization
Research Field in Engineering, Science and Engineering Area Graduate School of Science and Engineering (Engineering) Department of Engineering Ocean Civil Engineering Program Assistant Professor
Title
Assistant Professor

Degree

  • 博士(工学) ( 2010.3   鹿児島大学 )

Research History

  • Kagoshima University   Research Field in Engineering, Science and Engineering Area Graduate School of Science and Engineering (Engineering) Department of Engineering Ocean Civil Engineering Program   Assistant Professor

    2020.4

  • Kagoshima University   Research Field in Engineering, Science and Engineering Area Graduate School of Science and Engineering (Engineering) Ocean Civil Engineering Course   Assistant Professor

    2015.4 - 2020.3

Professional Memberships

  • 日本混相流学会

    2020.4

  • オープンCAE学会

    2015.10

  • 水難学会

    2015.10

  • 土木学会

    2015.10

Committee Memberships

  • 水難学会   ため池・用水路事故対策技術委員会委員長  

    2020.4   

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    Committee type:Other

  • 日本混相流学会   論文集編集委員  

    2020.4   

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    Committee type:Academic society

  • 土木学会   研究発表会運営委員会  

    2019.4   

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    Committee type:Other

 

Papers

  • Akio Nagayama .  Tsunami Wave Height by Bandpass Filter Along the Southern Kyushu States Considering Offshore Islands .  The 32nd International Ocean and Polar Engineering Conference   2022.6Tsunami Wave Height by Bandpass Filter Along the Southern Kyushu States Considering Offshore Islands Reviewed

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  • 長山 昭夫, 井﨑 丈 .  軽石群の狭窄部における移動過程に関する実験的検討 .  土木学会論文集B3(海洋開発)78 ( 2 ) I_865 - I_870   2022.6軽石群の狭窄部における移動過程に関する実験的検討Reviewed

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    DOI: https://doi.org/10.2208/jscejoe.78.2_I_865

  • NAGAYAMA Akio, HAGINO Riku .  EXAMINATION OF TSUNAMI WATER LEVEL FROM SOUTHERN COAST OF MIYAZAKI TO OSUMI PENINSULA AND TANEGASHIMA COAST OF KAGOSHIMA .  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)77 ( 2 ) I_301 - I_306   2021.11

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    <p> The estimated height of the tsunami wave in the southern coastal area of Kyushu due to the Nankai trough has been examined by the Kagoshima prefectural government and Miyazaki prefectural government and certain knowledge. However, the time fluctuations of the tsunami water level along the coasts of Miyazaki prefecture, which has shallow topography, and the coasts of Osumi peninsula and Tanegashima in Kagoshima prefecture, have not been sufficiently investigated.</p><p> This study focuses on water level fluctuations when a wide range of active faults move. (1) The relationship between the maximum water level arrival time of the tsunami and the coastal topography in the coastal area was examined. (2) The relationship between the tsunami water level along the Tanegashima coast due to the reflected waves from the Osumi peninsula was clarified. In this study, we found the following. (1) In coastal areas with shallow terrain, the maximum water level is reached in the first incident wave, but in the case of bay terrain, it was found that the maximum arrival time of the tsunami occurs later than the first wave of tsunami. (2) As a result of arranging the main appearance spectra of water level fluctuations along the coast of Shibushi bay, it was confirmed that the water level rises in different major period in the inner part of the bay and the mouth of the bay that depended resonance period of the bay. (3) It was found that there are most of the eastern coast area of Tanegashima occure the maximum water level from the first wave from tsunami, but the western coast area occure the maximum water level that was affected that some reflected waves from the Osumi peninsula.</p>

    DOI: 10.2208/kaigan.77.2_I_301

  • Asano T. Nagayama A. .  Analysis of workload required for removal of drifting pumice after a volcanic disaster as an aspect of a port business continuity plan: A case study of Kagoshima Port, Japan .  International Journal of Disaster Risk Reduction64   2021.10

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    Language:Japanese   Publisher:International Journal of Disaster Risk Reduction  

    DOI: 10.1016/j.ijdrr.2021.102511

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  • 長山昭夫 .  直下型地震における鹿児島湾中央西部での 津波波高とエッジ波生成の検討 .  土木学会論文集B2(海岸工学)76 ( 2 ) 277 - 282   2020.11直下型地震における鹿児島湾中央西部での 津波波高とエッジ波生成の検討Reviewed

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  • 浅野敏之,長山昭夫,加古真一郎 .  火山噴火災害時の港湾 BCP 立案の基礎となる 海域内降下火砕物の流動解析 .  土木学会論文集B2(海岸工学)76 ( 2 ) 1321 - 1326   2020.11火山噴火災害時の港湾 BCP 立案の基礎となる 海域内降下火砕物の流動解析 Reviewed

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  • Akio Nagayama .  Effect of tidal fluctuation on temperature field of thermal fluid in porous media by beach of Ibusuki coast .  International Society of Offshore and Polar Engineers 2020   2020.6Effect of tidal fluctuation on temperature field of thermal fluid in porous media by beach of Ibusuki coastReviewed

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  • NAGAYAMA Akio .  TSUNAMI HEIGHT AND EDGE WAVES IN THE CENTRAL WESTERN PART OF KAGOSHIMA BAY CAUSED BY A DIRECT EARTHQUAKE .  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)76 ( 2 ) I_277 - I_282   2020

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    <p> It has been pointed out that the generation of tsunami edge waves propagating in the shore line on the continental shelf is one of the causes of the spread of the disaster areas of the Hokkaido Tokachi-oki Earthquake Tsunami (2003) and the Tohoku-Pacific Ocean Earthquake Tsunami (2011). In 2017, there was a M5.3 earthquake with an epicenter of the central western of Kagoshima bay where no active faults identified.In this paper, we investigated the relationship between fault parameters and tsunami height for the entire Kagoshima Bay using a two dimensional model assuming a direct earthquake occurring in the bay.Next, we investigated the generation of tsunami height and edge waves in the coastal area by reproducing the detailed 3D topography of the coastal area in the central western part of the bay and using a 3D computational fluid model. As the results, When the source location and the fault parameters were changed, the maximum wave was the first wave at the offshore measurement point in most cases.At the coastal measurement points, there were several points that satisfied the edge wave dispersion relational expression, and there is a possibility that standing edge waves and progressive edge waves were generated in the central coastal area of the bay.</p>

    DOI: 10.2208/kaigan.76.2_I_277

  • ASANO Toshiyuki, NAGAYAMA Akio, KAKO Shin-ichiro .  HYDRODYNAMIC ANALYSES OF FALLEN TEPHRA CONTAINED TIDAL FLOWS TO UTILYZE FOR PORT BUSINESS CONTINUITY PLAN AGAINST A VOLCANIC ERUPTION DISASTER .  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)76 ( 2 ) I_1321 - I_1326   2020

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    <p> Most main ports in Japan have established their Port Business Continuity Plan (Port-BCP) in case a supposing natural disaster might draw functional disorder in the port. The objectives of Port-BCP are to maintain the minimum vital activities such as transporting emergency supply, and to resume its functions within the allowable period. The existing plans, however, only focus on earthquake or tsunami disasters as the natural exerting force, but fail to consider volcanic disasters. For Kagoshima Port, which locates only 10km apart from the crater of Sakurajima volcano, developing the Port-BCP preparing for a future large-scale explosive eruption is indispensable. This study proposes a numerical model of advection-diffusion-sedimentation of tephra flows to estimate the amounts of deposited volumes fallen in water basin of Kagoshima Bay, and as well as proposes hydrodynamic models to simulate drifting and landing of the fallen tephra under the tidal motions in the basin. As the results, the following tephra deposit characteristics are found; the deposited area of the pumice becomes narrower than that of ash due to the large fall velocity, the width of deposit areas decreases as the wind velocity increases due to the predominance of advection over diffusion, the maximum volume of tephra deposition in the basin occurs under north wind condition because of the relative location of Sakurajima to the basin.</p>

    DOI: 10.2208/kaigan.76.2_I_1321

  • Nagayama A. .  Effect of tidal fluctuation on temperature field of thermal fluid in porous media by beach of ibusuki coast .  Proceedings of the International Offshore and Polar Engineering Conference2020-October   2700 - 2705   2020

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  • 長山昭夫, 森元裕貴, 三宅崇智 .  指宿港海岸における地下熱流体の移流拡散現象の検討 .  土木学会論文集B2(海岸工学)75 ( 2 ) I_31 - I_36   2019.10指宿港海岸における地下熱流体の移流拡散現象の検討Reviewed

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    DOI: https://doi.org/10.2208/kaigan.75.I_31

  • 三宅 崇智, 小野 信幸, 笠毛 健生, 中村 将平, 藤原 尭也, 雪丸 敏昭, 甲斐 信治, 長山 昭夫, 浅野 敏之 .  指宿港海岸における養浜による温泉地下水への影響把握のための現地観測 .  土木学会論文集B2(海岸工学)75 ( 2 ) I_37 - I_42   2019.10指宿港海岸における養浜による温泉地下水への影響把握のための現地観測Reviewed

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    DOI: https://doi.org/10.2208/kaigan.75.I_37

  • Akio Nagayama, Ryoichi Yanagawa .  Modeling Coastal Urban Flooding Scenario Caused by Tsunami Breakwater Overtopping .  International Society of Offshore and Polar Engineers 2019   2019.6Modeling Coastal Urban Flooding Scenario Caused by Tsunami Breakwater OvertoppingReviewed

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  • MIYAKE Takatomo, ONO Nobuyuki, KASAMO Kenki, NAKAMURA Shohei, FUJIWARA Takaya, YUKIMARU Toshiaki, KAI Nobuhiro, NAGAYAMA Akio, ASANO Toshiyuki .  FIELD OBSERVATION ON THE IMPACT OF BEACH NOURISHMENT ON HOT SPRING GROUNDWATER IN IBUSUKI PORT COAST .  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)75 ( 2 ) I_37 - I_42   2019

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    <p> In Ibusuki port coast, a coastal improvement project is in progress applying the idea of integrated shore protection system combining several coastal works and beach nourishment. For the construction of these works, the local groundwater environment system named as "natural sand-steaming hot spring" should be carefully conserved, because that is an important tourism resource in the region. This study intends to evaluate the impact on the hot-spring groundwater system by the beach nourishment work. In this purpose, we conducted in-situ field measurements to monitor the variations of the groundwater levels and sand temperature in the sandy beach by placing test nourishment sands.</p><p> The results show that any significant effects have not been obtained in the areas behind the seawall and neighboring region of the nourishment, whereas, the marked risings in groundwater level and sand temperature have been observed in the beach nourishment area.</p>

    DOI: 10.2208/kaigan.75.I_37

  • NAGAYAMA Akio, MORIMOTO Yuki, MIYAKE Takatomo .  THERMAL FLUID DIFFUSION AND ADVECTION PHENOMENA IN POROUS MEDIA BY BEACH OF IBUSUKI COAST .  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)75 ( 2 ) I_31 - I_36   2019

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    <p> Sand steam hot spring using underground hot spring water has been used for a long time on the sandy beach of Ibusuki coast of Ibusuki city, Kagoshima prefecture. In recent years, a coastal maintenance project has been implemented in this coastal area. Therefore, detailed on-site observation has carried out about the effusion of underground hot spring water. In this paper, we developed a multiphase flow solver that adds a calculation term to reproduce flow and temperature fields in porous media. Then, we examined the influence of the tide level on the temperature in the sandy beach and the effusion of the hot spring water. As a result, it was possible to reproduce the phenomenon that the temperature field in the sandy beach fluctuate greatly with the tide level fluctuation. And we clarified the phenomenon that the vertical upward flow was always generated at the shoreline position at the time of the low tide.</p>

    DOI: 10.2208/kaigan.75.I_31

  • Nagayama A. .  Modeling coastal urban flooding scenario caused by tsunami breakwater overtopping .  Proceedings of the International Offshore and Polar Engineering Conference3   3266 - 3272   2019

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  • 長山 昭夫,田中 友崇,坂口 凌雅,末吉 遼大,浅野 敏之 .  規則配置された円柱群への津波波圧特性に 関する検討 .  土木学会論文集B2(海岸工学)74 ( 2 )   2018.11規則配置された円柱群への津波波圧特性に 関する検討Reviewed

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  • 三宅 崇智, 宇野 喜之, 小野 信幸, 雪丸 敏昭, 久保 敏哉, 長山 昭夫, 浅野 敏之 .  指宿港海岸における温泉地下水変動特性の現地観測 .  土木学会論文集B2(海岸工学)74 ( 2 ) I_85 - I_90   2018.11指宿港海岸における温泉地下水変動特性の現地観測Reviewed

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    DOI: https://doi.org/10.2208/kaigan.74.I_85

  • Akio NAGAYAMA,Tomotaka TANAKA,Toshiyuki ASANO .  Effects of Front Slope of a Breakwater on Tsunami Jet Flow Characteristics .  The 28th International Ocean and Polar Engineering Conference   2018.6Effects of Front Slope of a Breakwater on Tsunami Jet Flow CharacteristicsReviewed

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  • 田中 友崇,坂口 凌雅,井崎 丈,浅野 敏之,長山 昭夫 .  防波堤前面勾配が津波ジェット流の流動特性に与える影響 .  土木学会西部支部研究発表会講演集   2018.3防波堤前面勾配が津波ジェット流の流動特性に与える影響

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  • 末吉 遼大,坂口 凌雅,田中 友崇,長山 昭夫 .  格子配列タンク群における後方タンクへの作用波圧に関する検討 .  土木学会西部支部研究発表会講演集   2018.3格子配列タンク群における後方タンクへの作用波圧に関する検討

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  • 坂口 凌雅,田中 友崇,末吉 遼大,井崎 丈,長山 昭夫 .  規則的に配列されたタンク群に作用する津波波力に関する水理模型実験 .  土木学会西部支部研究発表会講演集   2018.3規則的に配列されたタンク群に作用する津波波力に関する水理模型実験

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  • 剥岩 智成,田中 龍児,長山 昭夫 .  UAVを活用した三次元再構成の精度検証 .  土木学会西部支部研究発表会講演集   2018.3UAVを活用した三次元再構成の精度検証

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  • NAGAYAMA Akio, TANAKA Tomotaka, SAKAGUCHI Ryouga, SUEYOSHI Ryoudai, ASANO Toshiyuki .  STUDY ON TSUNAMI WAVE PRESSURE OF REGULARLY-ARRANGED CYLINDRES .  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)74 ( 2 ) I_259 - I_264   2018

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    &nbsp;Conventionally, for the estimation of a wave pressure to a structure by a tsunami, a method assuming hydrostatic pressure has been proposed. The method is adopted as a design guideline for the tsunami evacuation building. However, the method was targeted to the wall surface of a single structure. Verification under the condition that a plurality of structures are arranged is not sufficient. From this background, this study covers regularly arranged cylinder groups. The relationship between the installation interval of the cylinder, the generated wave pressure and the specific energy was studied by numerical calculation and model experiment. As a result, it was found that the wave pressure characteristics to the cylinder in the grid-arranged column group are strongly influenced by the lattice spacing.

    DOI: 10.2208/kaigan.74.I_259

  • MIYAKE Takatomo, UNO Yoshiyuki, ONO Nobuyuki, YUKIMARU Toshiaki, KUBO Toshiya, NAGAYAMA Akio, ASANO Toshiyuki .  FIELD OBSERVATION ON FLUCTUATION CHARACTERISTICS OF HOT SPRING GROUNDWATER IN IBUSUKI PORT COAST .  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)74 ( 2 ) I_85 - I_90   2018

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    &nbsp;In Ibusuki port coast, a coastal improvement project is in progress applying the idea of integrated shore protection system combining jetties, offshore breakwaters, seawalls and beach nourishment. For the construction of these works, the local environment of the hot spring groundwater system named as &ldquo;natural sand-steaming hot spring&rdquo; should be carefully conserved, because that is an important tourism resource in the region. This study intends to estimate the impact of the beach nourishment on the hot spring groundwater. Comprehensive field observations continued for four seasonal periods on the groundwater levels and temperatures have been conducted to understand their fluctuating characteristics under the tidal motions. From the observation results of the groundwater levels and temperatures, their horizontal, vertical and temporal variations have been analyzed. The characteristic behaviors of the groundwater flows, such as a cold seawater mass penetrates into the hot groundwater flows during flood tide, a hot water mass seeps out on the surface of the sandy beach during ebb tide, have been confirmed.

    DOI: 10.2208/kaigan.74.I_85

  • Nagayama A. .  Effects of front slope of a breakwater on tsunami jet flow characteristics .  Proceedings of the International Offshore and Polar Engineering Conference2018-June   646 - 653   2018

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  • 長山 昭夫,石本 健治,種田 哲也,井崎 丈,浅野 敏之 .  遡上津波による直立型構造物周辺の水位変動の数値解析 .  土木学会論文集B2(海岸工学)73 ( 2 )   2017.11遡上津波による直立型構造物周辺の水位変動の数値解析Reviewed

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  • 切手 廉士,御領 聡史,井﨑 丈,種田 哲也,長山 昭夫,浅野 敏之 .  陸棚上の長周期波の伝搬に関する基礎的研究 .  土木学会論文集B2(海岸工学)73 ( 2 ) 169 - 174   2017.11陸棚上の長周期波の伝搬に関する基礎的研究Reviewed

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  • 長山 昭夫, 田中 友崇,浅野 敏之 .  遡上津波によるタンク群への作用波圧と水位変動特性の検討 .  土木学会論文集B3(海洋開発)特集号(Vol.73, No.2)73 ( 2 )   2017.6Reviewed

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  • 図師 幸太朗,朝倉 周,御領 聡,長山 昭夫 .  構造物形状や地形条件が津波の水位変動に与える影響の検討 .  平成28年度土木学会西部支部研究発表会講演概要集   2017.3構造物形状や地形条件が津波の水位変動に与える影響の検討

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  • 朝倉 周,図師 幸太朗,御領 聡史,井崎 丈,種田 哲也,長山 昭夫 .  格子状に配置された円柱群への津波作用波圧に関する検討 .  平成28年度土木学会西部支部研究発表会講演概要集   2017.3格子状に配置された円柱群への津波作用波圧に関する検討

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  • KITTE Renshi, GORYO Satoshi, IZAKI Takeshi, TANEDA Tetsuya, NAGAYAMA Akio, ASANO Toshiyuki .  BASIC STUDY OF LONG WAVE PROPAGATION OVER A CONTINENTAL SHELF .  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)73 ( 2 ) I_169 - I_174   2017

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    &nbsp;This study investigates characteristic changes of edge waves by a topographic obstacle like a cape experimentally and numerically. The experiments were conducted in a small wave tank with setting a step-type shelf to measure two dimensional water surface fluctuations. The dispersion relationships and on-offshore wave heights of the edge wave components are found to be consistent with those described by the edge wave theory. In the numerical analysis where a concentric circle topography for the shoreline and shelf edge was set, characteristics of edge wave propagation and on-offshore distributions of edge wave height were analyzed. These results are found to reproduce the characteristics expressed by the edge wave theory. The characteristic changes of edge wave celerity and plane wave height distribution by a topographic obstacle are discussed based on the experimental and numerical results by changing experimental conditions and dimension of a model obstacle systematically.

    DOI: 10.2208/kaigan.73.I_169

  • NAGAYAMA Akio, ISHIMOTO Kenji, TANEDA Tetsuya, IZAKI Takeshi, ASANO Toshiyuki .  ANALYSIS OF TSUNAMI SURGE LEVEL VARIATIONS AROUND AN UPRIGHT STRUCTURE .  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)73 ( 2 ) I_889 - I_894   2017

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    &nbsp;In the 2011 Tohoku tsunami, coastal urban areas were widely damaged by its huge hydrodynamic forces. However we have not fully revealed the huge tsunami hydrodynamic force acting on the structures. This is due to insufficient understanding on the relationships tsunami surge heights and shape of structure. When a huge tsunami strikes a uprigth structure, the tip of the tsunami runs vertically up the front face of the structure; herein, this phenomenon is called the tsunami jet flow. In response to the above background, this study aimes to improve the reproducibility of the tsunami water level fluctuation, by introduce dynamic contact angle to VOF model. It is found that the present model has certain accuracy on the reproducibility of the tsunami water level fluctuation.

    DOI: 10.2208/kaigan.73.I_889

  • NAGAYAMA Akio, TANAKA Tomotaka, ASANO Toshiyuki .  ANALYSIS OF TSUNAMI SURGE PRESSURES ACTING ON GROUPED OIL TANKS AND GENERATED WATER SURFACE MOTIONS .  Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)73 ( 2 ) I_90 - I_95   2017

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    &nbsp;In the 2011 Tohoku tsunami, the number of oil tanks in petrochemical complexes along the coast were damaged by its huge hydrodynamic forces. The detailed mechanism how the tsunami force acts on a specific point or specific member of the grouped tanks has not been sufficiently clarified. The aim of this study is to investigate hydrodynamic tsunami forces acting on oil tanks arranged in a grid system. The possibilities that the hydrodynamic pressure inside the grouped tanks become greater than that acting on a single tank are revealed, and the characteristics of the pressures are found to be depending on the position and arrangement of the grouped tanks. It is also noted that the starting time of water level rise is much affected by the spacing conditions of the tank arrangement.

    DOI: 10.2208/jscejoe.73.I_90

  • 石本健治,上村昇大,井﨑丈,種田哲也,長山昭夫,浅野敏之 .  津波が防波堤を越流する時の3次元流動に関する研究 .  土木学会論文集B2(海岸工学)72 ( 2 )   2016.11津波が防波堤を越流する時の3次元流動に関する研究Reviewed

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  • 長山昭夫,犬飼直之,松島康太,浅野敏之 .  OpenFOAM を利用した新潟県上下浜水難事故時の遡上域における流れ場の検討 .  土木学会論文集B2(海岸工学)72 ( 2 )   2016.11OpenFOAM を利用した新潟県上下浜水難事故時の遡上域における流れ場の検討Reviewed

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  • 石本 健治,長山 昭夫,浅野 敏之 .  津波が構造物を越流する時の3次元流動に関する研究 .  土木学会論文集B2(海岸工学)72 ( 2 ) 925 - 930   2016.11津波が構造物を越流する時の3次元流動に関する研究Reviewed

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  • Kenji ISHIMOTO,Iyan E.MULIA,Toshiyuki ASANO .  EXPERIMENTAL AND NUMERICAL ANALYSES OF TSUNAMI JET FLOWS IN FRONT OF AN UPRIGHT BREAKWATER .  International Conference on Coasts, Ports and Marine Structures   2016.10EXPERIMENTAL AND NUMERICAL ANALYSES OF TSUNAMI JET FLOWS IN FRONT OF AN UPRIGHT BREAKWATERReviewed

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  • 浅野敏之 .  OpenFOAMを利用した津波のタンク群への作用波圧特性の検討 .  第35回日本自然災害学会学術講演会 ( 35 ) 11 - 12   2016.9OpenFOAMを利用した津波のタンク群への作用波圧特性の検討

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)   Publisher:日本自然災害学会  

  • Iyan E. Mulia,Toshiyuki Asano,Akio Nagayama .  Real-time forecasting of near-field tsunami waveforms at coastal areas using a regularized extreme learning machine .  Coastal Engineering109   1 - 8   2016.3Real-time forecasting of near-field tsunami waveforms at coastal areas using a regularized extreme learning machineReviewed

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    This study applied an extreme learning machine to produce rapid forecasts of tsunami waveforms in coastal areas using tsunami signals recorded at specified locations. The remarkable training speed of the algorithm means that it can run in real-time, and therefore it is suitable for early warning systems in near-field tsunami events. Additionally, as a universal function approximator, the proposed method can capture nonlinearities exhibited by the tsunami. Therefore, it provides advantages over the standard inversion analysis used in many existing studies, which is typically developed under a linear assumption. We applied the proposed method to the 2011 Tohoku earthquake tsunami. Our results demonstrate that the proposed method is more accurate and does not significantly increase the computing time, when compared with the standard method. Furthermore, our model uncertainty analysis proves that the method is robust and reliable, despite its dependency on the random input weights and biases (the forecasts from several consecutive runs showed insignificant variability).

    Other Link: http://www.sciencedirect.com/science/article/pii/S0378383915002070

  • 長山昭夫,古田島樹,田中龍児 .  屋久島いなか浜に上陸するウミガメの産卵活動と海浜環境の相関に関する基礎的研究 .  土木学会論文集B3(海洋開発)68   2014.1屋久島いなか浜に上陸するウミガメの産卵活動と海浜環境の相関に関する基礎的研究Reviewed

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  • 田中龍児,西隆一郎,長山昭夫 .  ハンディGPSを用いた海岸地形測量法の開発 .  土木学会論文集B3(海洋開発)67   2013.1ハンディGPSを用いた海岸地形測量法の開発Reviewed

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  • A.NAGAYAMA,T.ASANO .  Study on Dynamic Process of Tombolo Topography at Chiringa-Shima Island By Image Data Based on Point Camera Observation .  Proceedings of the Sixth International Conference on Asian and Pacific Coasts   2011.1Study on Dynamic Process of Tombolo Topography at Chiringa-Shima Island By Image Data Based on Point Camera ObservationReviewed

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  • 長山昭夫,谷山昌弘,川上弘次,浅野敏之 .  知林ヶ島陸繋砂州の年間を通じた変動過程に関する研究 .  土木学会論文集B2(海岸工学)66   156 - 160   2010.11知林ヶ島陸繋砂州の年間を通じた変動過程に関する研究Reviewed

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  • 長山昭夫,前野祐二,金子和久,岡部圭子,三原めぐみ,平瑞樹 .  しらすのセメント安定処理工法を活用したパドック簡易舗装 .  地盤環境および防災における地域資源の活用に関するシンポジウム   2010.8しらすのセメント安定処理工法を活用したパドック簡易舗装Reviewed

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  • 大田昌孝,前野祐二,長山昭夫 .  ごみ焼却灰などの各種廃棄物焼却灰を主原料としたエコ混合セメントの化学特性について .  地盤環境および防災における地域資源の活用に関するシンポジウム   111 - 114   2010.8ごみ焼却灰などの各種廃棄物焼却灰を主原料としたエコ混合セメントの化学特性についてReviewed

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  • 長山昭夫,浅野敏之 .  指宿知林ヶ島陸繋砂州の断面形状特性に関する研究 .  土木学会論文集B3(海洋開発)64 ( 4 )   2010.7指宿知林ヶ島陸繋砂州の断面形状特性に関する研究Reviewed

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  • 長山昭夫,山口裕之,茶屋彰仁,田中龍児,中村和夫,浅野敏之 .  指宿知林ヶ島陸繋砂州の形成・消滅過程に関する基礎的研究 .  第65回海岸工学論文集65   586 - 590   2009.11指宿知林ヶ島陸繋砂州の形成・消滅過程に関する基礎的研究Reviewed

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  • 長山昭夫,浅野敏之 .  桜島流下土砂の養浜材への適用に関する研究 .  海洋開発論文集23   1081 - 1086   2007.7桜島流下土砂の養浜材への適用に関する研究Reviewed

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  • 西隆一郎,二ツ町悟,伊藤秀行,三宅武治,長山昭夫 .  サンゴ礁海域の安全利用に関する基礎的研究 .  第53回海岸工学論文集53 ( 2 ) 111 - 115   2006.11サンゴ礁海域の安全利用に関する基礎的研究Reviewed

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  • 前野祐二,三原めぐみ,森寛,長山昭夫 .  都市ごみ焼却灰を主原料とした固化材開発の基礎的研究 .  土木学会論文集G62   297 - 307   2006.1都市ごみ焼却灰を主原料とした固化材開発の基礎的研究Reviewed

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  • 前野祐二,三原めぐみ,森寛,長山昭夫 .  石炭灰と都市ごみ焼却灰を主原料とした固化材の開発について .  人工地盤材料の利用技術に関するシンポジウム   141 - 144   2005.1石炭灰と都市ごみ焼却灰を主原料とした固化材の開発についてReviewed

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Books

  • 詳解 水力学演習

    水力学演習書プロジェクト( Role: Contributor ,  4章ベルヌーイの定理の分担執筆)

    日新出版  2022.10  ( ISBN:978-4-8173-0261-8

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    Total pages:200   Language:Japanese Book type:Scholarly book

  • 学生のための水力学数値計算演習

    山岸真幸,原田敦史,岡田敬夫, 野村高広,中村克孝, 白川英観,福岡寛, 早坂良,小薮栄太郎,酒井美月,長山昭夫, 松岡保正( Role: Joint author)

    日新出版・実用理工学入門講座・ISBN978-4-8173-0249-6  2015.6 

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Presentations

  • 長山昭夫   技術調査委員会の取り組みについて  

    第12回水難学会総会・学術講演会  2022.6  水難学会

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    Event date: 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 前田 智晴、長山 昭夫   押し波と引き波による開口部を考慮したビルに作用する津波波力の検討  

    令和3年度土木学会西部支部研究発表会  2022.3  土木学会西部支部

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    Event date: 2022.3

    Language:Japanese  

  • 山崎友賀、長山昭夫   風洞実験による狭窄部を考慮した軽石群の漂流挙動と移動速度の検討  

    令和3年度土木学会西部支部研究発表会  2022.3  土木学会西部支部

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 長山 昭夫   ため池における水中脱出時の限界斜面角度の検討  

    2021年度 水難学会 秋季研究発表会  2021.12  水難学会

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    Event date: 2021.12

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 長山 昭夫、井﨑 丈、松田 健宏   軽石の漂流風洞実験とSPH法による漂流物移動過程の検討  

    令和3年度土木学会全国大会 第76回年次学術講演会  2021.9  土木学会

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    Event date: 2021.9

    Language:Japanese  

  • Akio Nagayama   TSUNAMI WAVE POWER AND BUOYANCY IMPACT TO THE BUILDING THAT HAS THE WINDOW IN THE RETURN WAVE CONCENTRATED AREA   International conference

    2021.6 

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    Event date: 2021.6

    Language:English   Presentation type:Oral presentation (general)  

  • 影内 嵩洋,井崎 丈,長山 昭夫   湾内直下型地震津波による⿅児島湾⻄部におけるエッジ波生成の検討  

    土木学会西部支部研究発表会  2020.3 

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    Event date: 2020.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 榊孝太,長山昭夫   水中浮遊発電機を想定した球体の6自由度剛体運動の検討  

    土木学会西部支部研究発表会  2020.3 

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    Event date: 2020.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 長山昭夫   鹿児島県内の沿岸域形状が津波エッジ波の生成過程に与える影響   Invited

    平成31年度建設技術研修会  建設技術研修会

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:鹿児島県市町村自治会館  

  • Akio Nagayama   Effects of Front Slope of a Breakwater on Tsunami Jet Flow Characteristics   Invited

    National Safety Day 

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    Event date: 2019.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:The Wood Land Hotel  

  • Effects of Front Slope of a Breakwater on Tsunami Jet Flow Characteristics   Invited

    Special Lectures 

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    Event date: 2019.3

    Language:English   Presentation type:Oral presentation (general)  

  • 長山昭夫   遡上津波による構造物への作用波圧特性   Invited

    平成29年度『みなとの匠3G』 学識経験者による学術講演会  鹿児島港湾・空港整備事務所

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    Event date: 2018.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:鹿児島港湾・空港整備事務所  

  • Reproduction and verification of a wave field affecting water accident  

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    Event date: 2017.12

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 松島康太,井崎丈,種田哲也,石本健治,長山昭夫,浅野敏之   OpenFOAMを用いた浅水域から遡上域における水位変動計算精度の検討  

    平成27年度土木学会西部支部研究発表会  土木学会西部支部

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    Event date: 2015.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 川原拓也,長山昭夫,浅野敏之   岬などの地形障壁のある陸棚海岸上に形成されるエッジ波の特性  

    平成27年度土木学会西部支部研究発表会  土木学会西部支部

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    Event date: 2015.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 上村昇大,長山昭夫,井﨑丈,浅野敏之,種田哲也,石本健治   実験と数値計算による津波の防波堤越流現象の解析  

    平成27年度土木学会西部支部研究発表会  土木学会西部支部

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    Event date: 2015.3

    Language:Japanese   Presentation type:Oral presentation (general)  

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Works

  • 平成29年度 『みなとの匠3G』 学識経験者による学術講演会

    鹿児島港湾・空港整備事務所,鹿児島県,鹿児島市

    2018.12

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    巨大津波が都市部に侵入するとその都市部は甚大な被害を受けるが、その中で沿岸域の構造物群の被災状況がその後の復旧活動に大きく影響する。このため遡上津波による構造物群への作用波圧特性について検討した事例について紹介する。

Research Projects

  • 火山噴火災害時の港湾BCP立案の基礎となる水域内降下火砕物の流動解析

    2019.4 - 2021.3

    鹿児島大学地震火山地域防災センター  学内共同研究 

  • 越流津波による都市型浸水シナリオの高精度化に関する研究

    2018.6 - 2020.2

    民間財団等  公益財団法人高橋産業経済研究財団研究助成事業 

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    Grant type:Competitive

  • 遡上津波による沿岸石油コンビナートタンク群への作用波圧特性に関する基礎的研究

    2017.4 - 2019.3

    科学研究費補助金  若手研究(B)

    長山昭夫、浅野敏之