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Masaoka, Naoya

Graduate School of Agriculture, Division of Forest and Biomaterials Science Assistant Professor

Masaoka, Naoya
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    Last Updated :2025/05/02

    Basic Information

    Faculty

    • 農学部

    Email Address

    • Email Address

      masaoka.naoya.7ekyoto-u.ac.jp

    Professional Memberships

    • THE JAPANESE FOREST SOCIETY
    • JAPAN SOCIETY OF EROSION CONTROL ENGINEERING
    • From Apr. 2018, To Present
      水文・水資源学会

    Academic Degree

    • (Kyoto University)
    • (Kyoto University)

    Research History

    • From Oct. 2016, To Present
      Kyoto University, Graduate School of Agriculture, Division of Forest and Biomaterials Science, 特定助教
    • From Apr. 2016, To Sep. 2016
      Kyoto University, Division of Geo-Disaster, Disaster Prevention Research Institute, 研究員
    • From Apr. 2013, To Mar. 2016
      Kyoto University, Graduate School of Agriculture, Division of Forest and Biomaterials Science, 産官学連携研究員
    • From Apr. 2012, To Mar. 2013
      Kyoto University, Graduate School of Agriculture, Division of Forest and Biomaterials Science, 日本学術振興会特別研究員(PD)
    • From Apr. 2011, To Mar. 2012
      Kyoto University, Graduate School of Agriculture, Division of Forest and Biomaterials Science, 日本学術振興会特別研究員(DC2)
    • From Apr. 2022, To Present
      Graduate School of Agriculture, Kyoto University, Laboratory of Erosion Control, Division of Forest and Biomaterials Science, Assistant Professor

    Language of Instruction

    • Japanese
    • English

    ID,URL

    Website(s) (URL(s))

    researchmap URL

    list
      Last Updated :2025/05/02

      Research

      Research Topics, Overview of the research

      • Research Topics

        Analysis of bedrock groundwater flow properties in mountainous catchments based on intensive hydrological observations.
        Development of devices for measuring saturated and unsaturated hydraulic properties of soil.

      • Overview of the research

        To clarify the contribution of bedrock groundwater to the preservation of river discharge and the occurrence of landslide in mountainous catchments, we analyze groundwater flow properties by measuring levels and chemistries of groundwater obtained from monitoring nested bedrock wells.
        To predict the infiltration process of rain water into soil in forested area, precise information of unsaturated soil hydraulic properties should be obtained. We develop the new experimental device based on the evaporation method for measuring soil water retention curves and unsaturated hydraulic conductivity curves simultaneously.

      Research Interests

      • Discharge
      • Erosion Control Engineering
      • Slope failure
      • Forest hydrology
      • Rainfall infiltration
      • Groundwater
      • Soil

      Research Areas

      • Life sciences, Plant nutrition, soil science, Soil Physics
      • Life sciences, Forest science, Forest Hydrology
      • Life sciences, Forest science, Erosion Control Engineering

      Papers

      • Analyses of infiltration and runoff attributed to highly heterogeneous properties on a hillslope
        Masaoka Naoya; Yamakawa Yosuke; Kosugi Ken'ichirou; Mizuyama Takahisa; Tsutsumi Daizo
        The Japanese Forest Society Congress, 2011
      • Effect of heterogeneous pore water pressure variation on slope stability at mountainous hillslope
        Masaoka Naoya; Yamakawa Yosuke; Kosugi Ken'ichirou; Mizuyama Takahisa; Tsutsumi Daizo
        The Japanese Forest Society Congress, 2010
      • Application of electric resistivity method to measuring water content distribution in granite bedrock
        Yamakawa Yosuke; Kosugi Kenichirou; Sumida Jun; Masaoak Naoya; Mizuyama Takahisa
        The Japanese Forest Society Congress, 2010
      • Measurement accuracy of groundwater flow in hillslope by Electric Resistivity Survey
        Yamakawa Yosuke; Sumida Jun; Ryou Iristu; Masaoka Naoya; Kosugi Ken'ichirou; Mizuyama Takahisa
        The Japanese Forest Society Congress, 2009
      • Intensive measuring of soil water pressures for monitoring heterogeneous waterflow in the soil mantle
        Masaoka Naoya; Yamakawa Yosuke; Kosugi Kenichirou; Mizuyama Takahisa; Tsutsumi Daizo
        The Japanese Forest Society Congress, 2009
      • Field observation and numerical simulation for analyzing rainwater discharge processes
        Kosugi Ken'ichirou; Katsura Shin'ya; Masaoka Naoya
        The Japanese Forest Society Congress, 2009
      • Application of the Guelph permeameter method for in-situ permeability test in a forested hillslope
        Masaoka Naoya; Yanai Kotarou; Kosugi Ken'ichirou
        The Japanese Forest Society Congress, 30 May 2023
      • Study on permeability distribution and rainfall-runoff in sedimentary rock mountain
        Yanai Kotaro; Masaoka Naoya; Kosugi Ken'ichirou
        The Japanese Forest Society Congress, 30 May 2023
      • future change of sediment disaster risk using forecasted future climate change data around Japan
        FUKUDA Motoki; KOSUGI Ken'ichiro; MASAOKA Naoya
        The Japanese Forest Society Congress, 30 May 2023
      • Estimation of groundwater movement using data on runoff, water quality, and groundwater level
        Inaoka Jun; Kosugi Ken'ichirou; Masaoka Naoya
        The Japanese Forest Society Congress, 30 May 2023
      • Comparison of rainfall-runoff characteristics between different geologies based on field observations
        Inaoka Jun; Kosugi Ken'ichirou; Masaoka Naoya; Itokazu Tetsushi; Nakamura Kimihito; Fujimoto Masamitsu
        The Japanese Forest Society Congress, 30 May 2022
      • Hydrological processes of bedrock groundwater in the mountain of accretionary complex having fault structures
        Masaoka Naoya; Kosugi Ken'ichirou; Tani Tomoyuki; Matsushi Yuki; Yamakawa Yosuke
        The Japanese Forest Society Congress, 30 May 2022
      • Study on heterogeneous permeability distribution and drainage capacity on a bedrock surface
        Yanai Kotaro; Masaoka Naoya; Kosugi Ken'ichirou; Fujimoto Masamitsu
        The Japanese Forest Society Congress, 30 May 2022
      • Evaluation of sedimental disaster risk based on past highest precipitation amount
        FUKUDA Motoki; KOSUGI Ken'ichiro; MASAOKA Naoya
        The Japanese Forest Society Congress, 30 May 2022
      • Comparison of ion dynamics by decomposing high frequent electrical conductivity data of streamflow in forest catchments
        Shibata Natsuki; Katsuyama Masanori; Itokazu Tetsushi; Masaoka Naoya; Nakamura Kimihito; Kosugi Ken'ichiro
        The Japanese Forest Society Congress, 24 May 2021
      • Clarifying Rainfall-Runoff Responses in Sedimentary Rock Mountains by using HYCYmodel
        Inaoka Jun; Kosugi Ken'ichirou; Masaoka Naoya; Itokazu Tetsushi; Nakamura Kimihito
        The Japanese Forest Society Congress, 24 May 2021
      • Hydrological processes of Bedrock groundwater in Granitic mountain using Strontium isotopes tracer
        Takizawa Ryo; Katsuyama Masanori; Shin Kicheol; Masaoka Naoya; Kosugi Kenichirou
        The Japanese Forest Society Congress, 24 May 2021
      • Groundwater accumulation area and runoff properties in a granitic headwater catchment
        Masaoka Naoya; Kosugi Ken'ichirou; Fujimoto Masamitsu
        The Japanese Forest Society Congress, 24 May 2021
      • Effects of watershed scale on rainwater discharge from steep granitic mountains
        Kosugi Ken'ichirou; Masaoka Naoya; Hirota Tomotaka; Shirahige Kazuma; Yano Osamu; Nagata Yoko
        The Japanese Forest Society Congress, 25 May 2020
      • Effects of Topography and Geological Structure on Runoff at Sedimentary Rock Mountains
        Inaoka Jun; Kosugi Ken'ichirou; Masaoka Naoya; Tani Tomoyuki; Itokazu Tetsushi
        The Japanese Forest Society Congress, 25 May 2020
      • Effect of groundwater surface topography in bedrock on water budget in headwater catchments
        Masaoka Naoya; Kosugi Ken'ichirou; Fujimoto Masamitsu
        The Japanese Forest Society Congress, 25 May 2020
      • 土の不飽和透水試験:実験・室内試験（9）土壌水分特性試験（その3）
        正岡 直也; 小杉 賢一朗
        砂防学会誌, 2020
      • 土の不飽和透水試験:実験・室内試験（9）土壌水分特性試験（その3）
        正岡 直也; 小杉 賢一朗
        砂防学会誌, 2020
      • Estimation of groundwater flow path focusing on water quality in large relief sedimentary rocky mountain
        Tani Tomoyuki; Kosugi Kenichiro; Masaoka Naoya; Katsuyama Masanori
        The Japanese Forest Society Congress, 27 May 2019
      • Landslides caused by the heavy rain event of July 2018
        Kosugi Ken'ichirou; Masaoka Naoya; Shibata Suguru; Kato Naoki
        The Japanese Forest Society Congress, 27 May 2019
      • Application of self-potential method for evaluating subsurface structure of potential sites for deep-seated landslides
        Yamakawa Yosuke; Gomez Christopher; Masaoka Naoya; Kosugi Ken'ichirou
        The Japanese Forest Society Congress, 27 May 2019
      • Consideration of groundwater hydrological processes in granitic bedrock based on intensive observation data
        Masaoka Naoya; Kosugi Ken'ichirou; Fujimoto Masamitsu
        The Japanese Forest Society Congress, 27 May 2019
      • Observations of soil-layer structure and hydrological processes on a hillslope in Izu-Oshima volcano
        YAMAKAWA Yosuke; HOTTA Norifumi; TSUNETAKA Haruka; OHSAKA Okihiro; MASAOKA Naoya; IMAIZUMI Fumitoshi; KOSUGI Ken'ichirou
        Journal of the Japan Society of Erosion Control Engineering, 15 Jan. 2019
      • 伊豆大島における斜面の土層構造・水文プロセスの観測
        山川 陽祐; 堀田 紀文; 經隆 悠; 逢坂 興宏; 正岡 直也; 今泉 文寿; 小杉 賢一朗
        砂防学会誌, 15 Jan. 2019
      • estimation of the groundwater flow by the similarity analysis of the dissolved ion concentration
        Kanazawa Akito; Maruyama Kiyoteru; Ishida Koji; Kosugi ken'ichirou; Katsuyama Masanori; Masaoka Naoya; Kiji Saho
        Proceeding of Annual Conference, 2018
      • Analysis of rainfall-runoff process in a hillslope underlain by accretionary sedimentary rocks
        Yamakawa Yosuke; Matsushi Yuki; Kosugi Kenichirou; Takami Yusuke; Masaoka Naoya; Itokazu Tetsushi; Mizuyama Takahisa
        The Japanese Forest Society Congress, 2014
      • Study on bedrock groundwater based on densely-nested borehole observations
        Kosugi Kenichirou; Masaoka Naoya; Itokazu Tetsushi; Takagi Masayuki; Kakimoto Atsushi; Sugimoto Kohei; Mizuyama Takahisa
        The Japanese Forest Society Congress, 2014
      • Transpiration at drying soil along a hillslope in a Japanese cypress forest
        yamamoto hiroyuki; tsuruta kenji; kosugi yoshiko; makita naoki; katsuyama masanori; masaoka naoya; kosugi kenichirou; matsuo naoko; tani makoto
        The Japanese Forest Society Congress, 2014
      • Intensive observations of runoff and bedrock groundwater levels in a granitic headwater catchment
        Masaoka Naoya; Kosugi Kenichirou; Itokazu Tetsushi; Sugimoto Kouhei; Fujimoto Masamitsu; Mizuyama Takahisa
        The Japanese Forest Society Congress, 2014
      • Re-examination of storm-runoff mechanisms through an observation of soil water dynamics on a steep valley-side slope.
        Kojima Nagahiro; Masaoka Naoya; Tani Makoto
        The Japanese Forest Society Congress, 25 May 2020
      • Effects of geological differences on rainfall–runoff characteristics based on field measurements
        Jun Inaoka; Ken’ichirou Kosugi; Naoya Masaoka; Tetsushi Itokazu; Kimihito Nakamura; Masamitsu Fujimoto
        Hydrological Research Letters, 2022
        Access this paper :
      • Measuring water content distribution in hillslope with Combined penetrometer-moisture probe
        Masaoka Naoya; Kosugi Kenichirou; Yamakawa Yosuke; Mizuyama Takahisa
        The Japanese Forest Society Congress, 2007
      • Eco-morphological characteristics of fern species for slope conservation
        Laura Sanchez-Castillo; Ken'ichirou Kosugi; Naoya Masaoka; Tetsuya Kubota
        Journal of Mountain Science, 2019, Peer-reviewed
      • Improved evaporation method for the measurement of the hydraulic conductivity of unsaturated soil in the wet range
        Naoya Masaoka; Ken'ichirou Kosugi
        Journal of Hydrology, Jun. 2018, Peer-reviewed
      • Investigation of volcanic deposits using a combined penetrometer-moisture probe: Application in Izu-Oshima Volcano, Japan
        Yosuke Yamakawa; Norifumi Hotta; Haruka Tsunetaka; Okihiro Ohsaka; Naoya Masaoka; Fumitoshi Imaizumi; Ken'ichirou Kosugi
        International Journal of Erosion Control Engineering, 2018, Peer-reviewed
      • 平成30年7月豪雨による関西における災害
        里深好文; 小杉賢一朗; 中谷加奈; 正岡直也; 岡野和行; 笠原拓造; 柳崎剛; 山口雄一
        砂防学会誌, 2018, Peer-reviewed
      • Processes of bedrock groundwater seepage and their effects on soil water fluxes in a foot slope area
        Naoya Masaoka; Ken'ichirou Kosugi; Yosuke Yamakawa; Daizo Tsutsumi
        JOURNAL OF HYDROLOGY, Apr. 2016, Peer-reviewed
      • 2013 年台風 26 号によって伊豆大島で生じた表層崩壊の発生機構について
        堀田紀文; 後藤優弥; 山川陽祐; 經隆悠; 正岡直也; 今泉文寿
        第8回土砂災害に関するシンポジウム論文集, 2016, Peer-reviewed
      • 斜面勾配が雨水の不飽和浸透に及ぼす影響に関する数値シミュレーション
        小杉賢一朗; 糸数哲; 正岡直也
        地形, 2016, Peer-reviewed
      • Determinants of Estimated Residence Time of Ground- and Spring Waters with Tracer Approach in Forested Headwater Catchments
        勝山正則; 長野龍平; 長野龍平; 辻村真貴; 芳賀弘和; 正岡直也; 榊原厚一; 野中隼人; 野中隼人; 谷誠; 谷誠
        地形, 2016, Peer-reviewed
      • Effects of Bedrock Groundwater on the Spatial Variability of Baseflow in a Small Granite Catchment
        藤本将光; 正岡直也; 小杉賢一朗; 馬場直輝; 糸数哲; 上田竜也; 酒井康裕; 下垣内裕哉; 勝山正則; 深川良一; 谷誠
        地形, 2016, Peer-reviewed
      • Rainfall-recharge-runoff processes through bedrock groundwater: implications for triggering of deep-seated catastrophic landslides
        Yuki Matsushi; Yosuke Yamakawa; Yusuke Takami; Naoya Masaoka; Ken'ichirou Kosugi
        Proceedings of 10th Asian Regional Conference of IAEG, 2015, Peer-reviewed
      • Modeling of Bedrock Groundwater Levels Based on Antecedent Precipitation Indices
        Ken'ichirou Kosugi; Masamitsu Fujimoto; Yosuke Yamakawa; Naoya Masaoka; Tetsushi Itokazu; Takahisa Mizuyama
        INTERPRAEVENT 2014 Conference Proceedings, 2014, Peer-reviewed
      • 関数モデルを用いた深層崩壊の要因となる基岩地下水位変動の解析
        小杉賢一朗; 三道義己; 藤本将光; 山川陽祐; 正岡直也; 水山高久; 平松晋也; 福山泰治郎; 地頭薗隆
        砂防学会誌, 2014, Peer-reviewed
      • Effects of bedrock groundwater and geological structure on hydrological processes in mountainous watersheds
        Naoya Masaoka; Ken'ichirou Kosugi; Masanori Katsutama; Takahisa Mizuyama; Shusuke Miyata; Daizo Tsutsumi
        INTERPRAEVENT 2014 Conference Proceedings, 2014, Peer-reviewed
      • 山体基岩内部の地下水位変動を解析するための実効雨量に基づく関数モデル
        小杉賢一朗; 藤本将光; 山川陽祐; 正岡直也; 糸数哲; 水山高久; 木下篤彦
        砂防学会誌, 2013, Peer-reviewed
      • Application of the electrical resistivity imaging for measuring water content distribution in hillslopes
        Yosuke Yamakawa; Naoya Masaoka; Ken'ichirou Kosugi; Yasuyuki Tada; Takahisa Mizuyama
        Journal of Disaster Research, 2013, Peer-reviewed
      • Application of a Combined Penetrometer-Moisture Probe for Investigating Heterogeneous Hydrological Properties of a Footslope Area
        Naoya Masaoka; Ken'ichirou Kosugi; Yosuke Yamakawa; Takahisa Mizuyama; Daizo Tsutsumi
        VADOSE ZONE JOURNAL, May 2012, Peer-reviewed
      • Combined geophysical methods for detecting soil thickness distribution on a weathered granitic hillslope
        Yosuke Yamakawa; Ken'ichirou Kosugi; Naoya Masaoka; Jun Sumida; Makoto Tani; Takahisa Mizuyama
        GEOMORPHOLOGY, Apr. 2012, Peer-reviewed
      • Analysis of Heterogeneous Hydrological Properties of a Mountainous Hillslope Based on Intensive Observations
        Naoya Masaoka
        Kyoto University, Mar. 2012
      • Spatial and Temporal Monitoring of Water Content in Weathered Granitic Bedrock Using Electrical Resistivity Imaging
        Yosuke Yamakawa; Ken'ichirou Kosugi; Shin'ya Katsura; Naoya Masaoka; Takahisa Mizuyama
        VADOSE ZONE JOURNAL, Feb. 2012, Peer-reviewed
      • Application of thermal infrared remote sensing for detecting slopes with high landslide-vulnerability
        KOSUGI Ken'ichirou; YAMAKAWA Yosuke; MASAOKA Naoya; MIZUYAMA Takahisa; FUNAKOSHI Kazuya
        Journal of the Japan Society of Erosion Control Engineering, 2012, Peer-reviewed
      • Use of a Combined Penetrometer-Moisture Probe Together with Geophysical Methods to Survey Hydrological Properties of a Natural Slope
        Yosuke Yamakawa; Ken'ichirou Kosugi; Naoya Masaoka; Yasuyuki Tada; Takahisa Mizuyama
        VADOSE ZONE JOURNAL, Aug. 2010, Peer-reviewed
      • 土壌水分計付貫入計と物理探査手法を組み合わせた斜面水文特性の計測
        山川陽祐; 小杉賢一朗; 正岡直也; 多田泰之; 水山高久
        2010土壌水分ワークショップ論文集, 2010, Peer-reviewed
      • Estimation of soil thickness distribution on a granitic hillslope using electric resistivity method
        Yosuke Yamakawa; Ken'ichirou Kosugi; Naoya Masaoka; Jun Sumida; Makoto Tani; Takahisa Mizuyama
        International Journal of Erosion Control Engineering, 2010, Peer-reviewed
      • Intensive measurements of soil pore water pressure for analyzing heterogeneous hydrological processes on a hillslope
        Naoya Masaoka; Yosuke Yamakawa; Ken'ichirou Kosugi; Takahisa Mizuyama; Daizo Tsutsumi
        International Journal of Erosion Control Engineering, 2010, Peer-reviewed
      • A Combined Penetrometer-Moisture Probe for Surveying Soil Properties of Natural Hillslopes
        Ken'ichirou Kosugi; Yosuke Yamakawa; Naoya Masaoka; Takahisa Mizuyama
        VADOSE ZONE JOURNAL, Feb. 2009, Peer-reviewed
      • Bedrock Groundwater Catchment Area Unveils Rainfall‐Runoff Processes in Headwater Basins
        N. Masaoka; K. Kosugi; M. Fujimoto
        Water Resources Research, Sep. 2021, Peer-reviewed
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      • Estimation of Spring Water Recharge Area in Headwater Catchments
        KANAZAWA Akito; MASAOKA Naoya; KOSUGI Ken’ichirou; KATSUYAMA Masanori; NAKAYA Hiroaki
        JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES, 05 Mar. 2021, Peer-reviewed
      • Effects of geological structures on rainfall‐runoff responses in headwater catchments in a sedimentary rock mountain
        Jun Inaoka; Ken'ichirou Kosugi; Naoya Masaoka; Tetsushi Itokazu; Kimihito Nakamura
        Hydrological Processes, 30 Dec. 2020, Peer-reviewed
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      • Detecting groundwater flowing on a mountain slope using electrical resistivity imaging
        Y. Yamakawa; N. Masaoka; K. Kosugi; T. Mizuyama; D. Tsutsumi
        Journal of Disaster Research, 2013, Peer-reviewed
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      Misc.

      • はかる 実験・室内試験(9)土壌水分特性試験(その3)土の不飽和透水試験
        正岡 直也; 小杉 賢一朗
        新砂防 = Journal of the Japan Society of Erosion Control Engineering : 砂防学会誌, Nov. 2020
      • 観測の現場を訪ねて(72)伊豆大島における斜面の土層構造・水文プロセスの観測—Observations of soil-layer structure and hydrological process on a hillslope in Izu-Oshima volcano
        山川 陽祐; 堀田 紀文; 經隆 悠; 逢坂 興宏; 正岡 直也; 今泉 文寿; 小杉 賢一朗
        新砂防 = Journal of the Japan Society of Erosion Control Engineering : 砂防学会誌, Jan. 2019
      • 土壌水分計付貫入計,比抵抗映像法,地中レーダー法の現場斜面への適用と比較
        山川陽祐; 正岡直也; 小杉賢一朗; 水山高久; 多田泰之; 岩村尚樹; 田中謙次; 野村成宏; 青野健治
        砂防学会研究発表会概要集, 2008
      • Investigation of soil mantle on hillslope using combined penetrometer-moisture probe and electrical resistivity method
        山川陽祐; 小杉賢一朗; 正岡直也; 多田泰之; 岩村尚樹; 水山高久
        土壌物理学会講演要旨集, 2007
      • 地盤内部を測る土壌水分計付貫入計の開発と適用
        山川陽祐; 小杉賢一朗; 正岡直也
        粉体技術, 2011, Peer-reviewed
      • 急傾斜森林斜面における土層調査と水文観測―表層崩壊発生機構の解明を目指して―
        小杉賢一朗; 山川陽祐; 正岡直也; 水山高久; 堤大三
        砂防学会誌, 2009, Peer-reviewed
      • 深層崩壊に対する警戒避難の発表ならびに解除に資する雨量データ解析
        小杉賢一朗; 千野佑輝; 中谷加奈; 正岡直也; 小竹利明; 菅原寛明; 田中健貴
        2019年度砂防学会研究発表会, May 2019
      • 崩壊発生時における斜面地下水の挙動
        小杉賢一朗; 正岡直也
        日本森林学会大会学術講演集, 26 Mar. 2018
      • 風化基岩層の不飽和水文特性計測の試み
        正岡直也; 小杉賢一朗
        日本森林学会大会学術講演集, 26 Mar. 2018
      • 花崗岩山地と堆積岩山地における雨水流出および溶存物質流出の空間不均一性
        小杉賢一朗; 正岡直也; 糸数哲; 藤本将光; 中村公人; 勝山正則
        日本森林学会大会学術講演集, 26 Mar. 2017
      • 湿潤領域の不飽和透水係数計測に対応した実用的な蒸発法装置の提案
        正岡直也; 小杉賢一朗
        日本森林学会大会学術講演集, 26 Mar. 2017
      • 堆積岩山地における地下水流出過程の検討
        橋本宏平; 中村公人; 小杉賢一朗; 勝山正則; 糸数哲; 正岡直也; 川島茂人
        2016年度土壌物理学会大会, Oct. 2016
      • 火山地域の崩壊斜面における不均一土層の保水性・透水性計測
        小松正弥; 正岡直也; 小杉賢一朗; 山川陽祐
        砂防学会研究発表会概要集, 18 May 2016
      • 花崗岩山地における基岩地下水の降雨応答特性が流出に及ぼす影響
        肥沼直輝; 小杉賢一朗; 正岡直也
        砂防学会研究発表会概要集, 18 May 2016
      • 土壌水分計付貫入計(CPMP)を用いた火山堆積物成層構造探査手法の検討―伊豆大島における事例―
        山川陽祐; 藤井修人; 今泉文寿; 逢坂興宏; 堀田紀文; 經隆悠; 後藤優弥; 正岡直也; 小杉賢一朗; 小松正弥
        砂防学会研究発表会概要集, 18 May 2016
      • 蒸発法に基づく実験装置を用いた土壌の不飽和水分特性ならびに表面流発生の計測
        正岡直也; 小杉賢一朗; 小杉賢一朗; 小松正弥
        砂防学会研究発表会概要集, 18 May 2016
      • 斜面崩壊の誘因となる山地水文環境の調査手法に関する検討
        小杉賢一朗; 高見友佑; 藤田克樹; 正岡直也; 糸数哲; 影浦亮太; 奥村稔; 河戸克志; 山内政也; 山根誠; 小松慎二; 安井秀; 安永一樹; 田中利和
        砂防学会研究発表会概要集, 18 May 2016
      • 空中電磁探査による滋賀県不動寺地区・信楽地区の比抵抗構造特性
        小杉賢一朗; 正岡直也; 糸数哲; 影浦亮太; 奥村稔; 河戸克志; 佐藤敏久
        砂防学会研究発表会概要集, 18 May 2016
      • 土石流源頭部周辺の水文プロセスから見た防災対策の課題
        小杉賢一朗; 正岡直也; 糸数哲; 和田孝志
        砂防学会研究発表会概要集, 18 May 2016
      • 花崗岩山地減流域の基岩内地下水が流出特性に与える影響
        正岡直也; 小杉賢一朗; 肥沼直輝; 藤本将光
        日本森林学会大会学術講演集, 27 Mar. 2016
      • Analysis of shallow landslide occurrence in volcanic area based on numerical simulation of infiltration
        Tsunetaka,Haruka; Goto,Yuya; Hotta,Norifumi; Masaoka,Naoya; Imaizumi,Fumitoshi; Yamakawa,Yosuke
        The Japanese Forest Society Congress, 2016
      • 湿潤領域の不飽和透水係数計測に対応した蒸発法装置の開発
        正岡直也; 小杉賢一朗
        土壌物理学会大会講演要旨集(CD-ROM), 2016
      • 堆積岩山地の複数の集水域における流出水の水質に及ぼす降水の影響
        橋本宏平; 中村公人; 小杉賢一朗; 勝山正則; 糸数 哲; 正岡直也; 川島茂人
        平成27年度農業農村工学会大会講演会講演要旨集, Sep. 2015
      • 花崗岩山地における基岩地下水の流動特性が降雨流出に及ぼす影響
        杉本康平; 小杉賢一朗; 正岡直也; 糸数哲; 水山高久; 藤本将光
        砂防学会研究発表会概要集, 20 May 2015
      • 地形解析・調査ボーリング・高密度電気探査・空中電磁探査ならびに水文観測を組み合わせた崩壊危険斜面の特性把握
        小杉賢一朗; 高見友佑; 正岡直也; PADILLA Cristobal; 水山高久; 松四雄騎; 山川陽祐; 安井秀; 安永一樹; 田中利和; 山内政也; 山根誠; 小松慎二; 影浦亮太; 奥村稔; 河戸克志
        砂防学会研究発表会概要集, 20 May 2015
      • 蒸発法を用いた火山性土壌の不飽和水分特性の計測
        正岡直也; 小杉賢一朗; 糸数哲
        砂防学会研究発表会概要集, 20 May 2015
      • 大起伏堆積岩山地における基岩地下水の水文挙動の解析
        高見友佑; 小杉賢一朗; 正岡直也; 水山高久; 松四雄騎; 山川陽祐; 安井秀; 安永一樹; 田中利和
        砂防学会研究発表会概要集, 20 May 2015
      • 空中電磁探査による滋賀県葛川流域の比抵抗構造特性
        小杉賢一朗; 正岡直也; PADILLA Cristobal; 水山高久; 影浦亮太; 奥村稔; 河戸克志
        砂防学会研究発表会概要集, 20 May 2015
      • 多層構造に着目した火山地帯での間隙水圧の鉛直分布に関する検討
        經隆悠; 田名網浩貴; 正岡直也; 今泉文寿; 堀田紀文; 山川陽祐; 小杉賢一朗
        日本森林学会大会学術講演集, 26 Mar. 2015
      • 花崗岩山地源流域における基岩内地下水の分布・流動機構
        正岡直也; 小杉賢一朗; 糸数哲; 杉本康平; 水山高久; 藤本将光
        日本森林学会大会学術講演集, 26 Mar. 2015
      • Factors controlling ground- and spring water residence time by considering subsurface structure in headwaters
        Nagano,Ryohei; Katsuyama,Masanori; Tsujimura,Maki; Haga,Hirokazu; Masaoka,Naoya; Sakakibara,Koichi; Ikeda,Hayato; Tani,Makoto
        The Japanese Forest Society Congress, 2015
      • 単峰性堆積岩山地流域の降雨流出過程と流出水の水質特性
        中村公人; 瀧田純平; 小杉賢一朗; 勝山正則; 糸数 哲; 正岡直也; 川島茂人
        平成26年度農業農村工学会大会講演会講演要旨集, Aug. 2014
      • 安定同位体比を用いた地下水流動機構の解明―紀伊半島深層崩壊地の事例―
        正岡直也; 小杉賢一朗; 水山高久; 糸数哲; 桜井亘; 酒井良; 岩田孝治; 永田雅一; 植田芳弘; 小川内良人; 清水幹輝
        砂防学会研究発表会概要集, 28 May 2014
      • 基岩地下水位変動の解析と深層崩壊発生時刻の予測について
        小杉賢一朗; 正岡直也; 糸数哲; 水山高久
        砂防学会研究発表会概要集, 28 May 2014
      • 付加体堆積岩山地における降雨流出プロセスの解析―滋賀県葛川流域における湧水の観測事例―
        山川陽祐; 松四雄騎; 小杉賢一朗; 高見友佑; 正岡直也; 糸数哲; 水山高久; 山根誠; 小松慎二; 山内政也
        砂防学会研究発表会概要集, 28 May 2014
      • 高密度ボーリング孔網を用いた基岩地下水解析
        杉本康平; 小杉賢一朗; 糸数哲; 正岡直也; 水山高久; 藤本将光
        砂防学会研究発表会概要集, 28 May 2014
      • 大起伏堆積岩山地における湧水の量と質に基岩地下水が与える影響
        高見友佑; 小杉賢一朗; 松四雄騎; 山川陽祐; 正岡直也; 糸数哲; 水山高久; 山根誠; 小松慎二; 山内政也
        砂防学会研究発表会概要集, 28 May 2014
      • 中古生層堆積岩山地における山地下水を考慮した水文過程
        柿本篤史; 小杉賢一朗; 糸数哲; 正岡直也; 水山高久; 山川陽祐; 小島永裕; 安井秀; 安永一樹; 田中利和
        砂防学会研究発表会概要集, 28 May 2014
      • 高密度ボーリング孔網を用いた基岩地下水研究
        小杉賢一朗; 正岡直也; 糸数哲; 高木将行; 柿本篤史; 杉本康平; 水山高久
        日本森林学会大会学術講演集(CD-ROM), 26 Mar. 2014
      • 土壌の乾燥が斜面位置の異なるヒノキの蒸散及び吸水深度に及ぼす影響
        山本浩之; 鶴田健二; 小杉緑子; 牧田直樹; 勝山正則; 正岡直也; 小杉賢一朗; 松尾奈緒子; 谷誠
        日本森林学会大会学術講演集(CD-ROM), 26 Mar. 2014
      • 花崗岩山地源流域における降雨流出と基岩内地下水位の集中的観測
        正岡直也; 小杉賢一朗; 糸数哲; 杉本康平; 藤本将光; 水山高久
        日本森林学会大会学術講演集(CD-ROM), 26 Mar. 2014
      • 堆積岩山地における降雨浸透過程と深層崩壊の発生機構
        松四雄騎; 山川陽祐; 小杉賢一朗; 高見友佑; 正岡直也; 糸数哲
        日本森林学会, Mar. 2014
      • 小起伏堆積岩山地における湧水の水文・水質特性
        瀧田純平; 中村公人; 勝山正則; 小杉賢一朗; 山川陽祐; 正岡直也; 糸数 哲; 小島永裕
        水文・水資源学会2013年度研究発表会, Sep. 2013
      • 高密度水流観測に基づく斜面水文特性分布の把握
        正岡直也; 小杉賢一朗; 山川陽祐; 水山高久; 堤大三
        砂防学会研究発表会概要集, 29 May 2013
      • 中古生層堆積岩山地における降雨流出の特徴
        柿本篤史; 小杉賢一朗; 糸数哲; 正岡直也; 水山高久; 山川陽祐; 小島永裕; 安井秀; 安永一樹; 田中利和
        砂防学会研究発表会概要集, 29 May 2013
      • 大起伏堆積岩山地における水理地質構造把握の試み
        山川陽祐; 松四雄騎; 小杉賢一朗; 正岡直也; 糸数哲; 水山高久
        砂防学会研究発表会概要集, 29 May 2013
      • 花崗岩山地における基岩地下水と降雨流出の対応
        杉本康平; 小杉賢一朗; 糸数哲; 正岡直也; 水山高久; 山川陽祐; 藤本将光
        砂防学会研究発表会概要集, 29 May 2013
      • 花崗岩ならびに堆積岩を地質とする大起伏山地における山体地下水挙動の比較
        小杉賢一朗; 山川陽祐; 松四雄騎; 藤本将光; 高木将行; 正岡直也; 糸数哲; 水山高久
        砂防学会研究発表会概要集, 29 May 2013
      • 大起伏堆積岩山地の流れ盤斜面における重力変形と地質構造に規制された地下水流出
        松四雄騎; 山川陽祐; 小杉賢一朗; 高見友佑; 正岡直也; 糸数哲
        日本地球惑星科学連合, May 2013
      • 山体水理構造の解明に向けた比抵抗探査法の適用
        山川陽祐; 松四雄騎; 正岡直也; 小杉賢一朗; 水山高久
        日本森林学会大会学術講演集(CD-ROM), 25 Mar. 2013
      • 岩盤湧水が山地斜面末端の水文過程に与える影響
        正岡直也; 小杉賢一朗; 山川陽祐; 水山高久; 堤大三
        日本森林学会大会学術講演集(CD-ROM), 25 Mar. 2013
      • Application of Strontium isotope to spatial scaling study of groundwater dynamics in forested catchments
        Katsuyama Masanori; Tani Makoto; Saitoh Yu; Kosugi Ken'ichiro; Masaoka Naoya; Tsutsumi Daizo; Miyata Shusuke; Tateno Ryunosuke; Fukushima Keitaro; Nakano Takanori
        Proceeding of Annual Conference, 2013
      • 長期高密度観測による斜面水文過程の時間的変化の解明
        正岡直也; 小杉賢一朗; 山川陽祐; 水山高久; 堤大三
        砂防学会研究発表会概要集, 23 May 2012
      • ヒノキ人工林における蒸散量の推定―樹液流計測を用いた検討―
        鶴田健二; 小杉賢一朗; 正岡直也; 吉藤奈津子; 水山高久
        砂防学会研究発表会概要集, 23 May 2012
      • 三次元浸透計算による斜面土層の不均質な透水性分布の推定
        正岡直也; 山川陽祐; 小杉賢一朗; 水山高久; 堤大三
        日本森林学会大会学術講演集(CD-ROM), 26 Mar. 2012

      Industrial Property Rights

      • 特許4911470, 特願2007-270385, 土壌水分計付き貫入試験器
        小杉賢一朗; 山川陽祐; 正岡直也; 梅川豊文

      External funds: Kakenhi

      • Study on the spatial distribution of water flow path within the soil layer in mountainous hillslopes
        Grant-in-Aid for Scientific Research (C)
        Basic Section 40010:Forest science-related
        Kyoto University
        正岡 直也
        From 01 Apr. 2020, To 31 Mar. 2024, Granted
        水みち;飽和透水係数;水分特性曲線;ゲルフパーミアメータ;T-TDRセンサー;基岩面地形;強風化基岩;圧力水頭;集水性;降雨流出過程;地形解析;テンシオメータ;流出モデル
        https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20K06125/
      • 高精度土砂災害予測のための山体地下水を考慮した水文モデルの開発と展開手法の構築
        Grant-in-Aid for Scientific Research (A)
        Medium-sized Section 40:Forestry and forest products science, applied aquatic science, and related fields
        Kyoto University
        小杉 賢一朗
        From 01 Apr. 2020, To 31 Mar. 2025, Granted
        土砂災害;水文モデル;斜面崩壊;土石流;土砂洪水氾濫;山体地下水;水源涵養
        https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20H00434/
      • Development of a storm-runoff model based on the measurements of saturated-unsaturated flow on a hillslope.
        Grant-in-Aid for Scientific Research (C)
        Basic Section 22040:Hydroengineering-related
        Lake Biwa Environmental Research Institute
        Nagahiro Kojima
        From 01 Apr. 2019, To 31 Mar. 2022, Project Closed
        山地源流域;谷壁斜面;降雨流出応答;流出機構;鉛直浸透過程;土壌物理性;斜面モデル;流出モデル;洪水流出;飽和不飽和浸透流;モデル開発
        https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19K04632/
      • 地形発達学的手法と種々のセンシング技術を応用した深層崩壊発生危険度評価手法の開発
        Grant-in-Aid for Scientific Research (B)
        Basic Section 40010:Forest science-related
        University of Tsukuba
        山川 陽祐
        From 01 Apr. 2019, To 31 Mar. 2023, Granted
        深層崩壊;地形発達;物理探査;地下水挙動;崩壊危険度評価
        https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19H02989/
      • Investigations of hydrological properties of forest soil and weathered bedrock layers by using improved evaporation method
        Grant-in-Aid for Young Scientists (B)
        Kyoto University
        Naoya Masaoka
        From 01 Apr. 2017, To 31 Mar. 2020, Project Closed
        風化基岩;花崗岩;水源涵養;不飽和水文特性;改良蒸発法;ワンステップ流出法;亀裂流;亀裂浸透;森林土壌;間隙連結特性;蒸発法;コアサンプル;不飽和透水曲線;自然現象観測・予測;水循環;森林水文学;土壌物理学;岩石学
        https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K15283/
      • Research on internal erosion of mountain slopes due to rainfall and improvement of drainage capacity
        Grant-in-Aid for Scientific Research (B)
        Basic Section 40010:Forest science-related
        Kyoto University
        正岡 直也
        From 01 Apr. 2024, To 31 Mar. 2028, Granted
        山地斜面;内部侵食;排水能力;ゲルフパーミアメータ;T-TDR
        https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24K01812/
      list
        Last Updated :2025/05/02

        Education

        Teaching subject(s)

        • From 01 Apr. 2024, To 31 Mar. 2025
          Laboratory Works in Erosion Control
          BG07, Spring, Graduate School of Agriculture, 2.5
        • From 01 Apr. 2024, To 31 Mar. 2025
          Laboratory Works in Erosion Control
          BG07, Fall, Graduate School of Agriculture, 2.5
        • From 01 Apr. 2024, To 31 Mar. 2025
          Laboratory Course in Applied Forest Science
          6937, Spring, Faculty of Agriculture, 3
        • From 01 Apr. 2024, To 31 Mar. 2025
          Theory of Erosion Control
          BA11, Fall, Graduate School of Agriculture, 2
        • From 01 Apr. 2024, To 31 Mar. 2025
          Seminar in Erosion Control
          BF07, Spring, Graduate School of Agriculture, 2
        • From 01 Apr. 2024, To 31 Mar. 2025
          Seminar in Erosion Control
          BF07, Fall, Graduate School of Agriculture, 2
        • From 01 Apr. 2024, To 31 Mar. 2025
          Laboratory Course in Forest and Biomaterials Basic Science II
          6909, Fall, Faculty of Agriculture, 2
        • From 01 Apr. 2024, To 31 Mar. 2025
          Laboratory Course in Forest and Biomaterials Basic Science I
          6907, Spring, Faculty of Agriculture, 2
        • From 01 Apr. 2024, To 31 Mar. 2025
          Basic Science for Forest and Biomaterials F
          6895, Spring, Faculty of Agriculture, 2
        • From 01 Apr. 2024, To 31 Mar. 2025
          Laboratory Course in Forest Hydrology and Erosion Control
          6845, Fall, Faculty of Agriculture, 2
        • From 01 Apr. 2023, To 31 Mar. 2024
          Laboratory Course in Applied Forest Science
          6937, Spring, Faculty of Agriculture, 3
        • From 01 Apr. 2023, To 31 Mar. 2024
          Laboratory Works in Erosion Control2
          BC31, Year-long, Graduate School of Agriculture, 5
        • From 01 Apr. 2023, To 31 Mar. 2024
          Laboratory Works in Erosion Control1
          BC30, Year-long, Graduate School of Agriculture, 5
        • From 01 Apr. 2023, To 31 Mar. 2024
          Seminar in Erosion Control1
          BB30, Year-long, Graduate School of Agriculture, 4
        • From 01 Apr. 2023, To 31 Mar. 2024
          Seminar in Erosion Control2
          BB31, Year-long, Graduate School of Agriculture, 4
        • From 01 Apr. 2023, To 31 Mar. 2024
          Basic Science for Forest and Biomaterials F
          6895, Spring, Faculty of Agriculture, 2
        • From 01 Apr. 2023, To 31 Mar. 2024
          Laboratory Course in Forest Hydrology and Erosion Control
          6845, Fall, Faculty of Agriculture, 2
        • From 01 Apr. 2023, To 31 Mar. 2024
          Laboratory Course in Forest and Biomaterials Basic Science II
          6909, Fall, Faculty of Agriculture, 2
        • From 01 Apr. 2023, To 31 Mar. 2024
          Laboratory Course in Forest and Biomaterials Basic Science I
          6907, Spring, Faculty of Agriculture, 2
        • From 01 Apr. 2022, To 31 Mar. 2023
          Basic Science for Forest and Biomaterials F
          6895, Spring, Faculty of Agriculture, 2
        • From 01 Apr. 2022, To 31 Mar. 2023
          Laboratory Course in Forest and Biomaterials Basic Science I
          6907, Spring, Faculty of Agriculture, 2
        • From 01 Apr. 2022, To 31 Mar. 2023
          Laboratory Course in Applied Forest Science
          6937, Spring, Faculty of Agriculture, 3
        • From 01 Apr. 2022, To 31 Mar. 2023
          Laboratory Works in Erosion Control2
          BC31, Year-long, Graduate School of Agriculture, 5
        • From 01 Apr. 2022, To 31 Mar. 2023
          Seminar in Erosion Control1
          BB30, Year-long, Graduate School of Agriculture, 4
        • From 01 Apr. 2022, To 31 Mar. 2023
          Laboratory Works in Erosion Control1
          BC30, Year-long, Graduate School of Agriculture, 5
        • From 01 Apr. 2022, To 31 Mar. 2023
          Laboratory Course in Forest Hydrology and Erosion Control
          6845, Fall, Faculty of Agriculture, 2
        • From 01 Apr. 2022, To 31 Mar. 2023
          Laboratory Course in Forest and Biomaterials Basic Science II
          6909, Fall, Faculty of Agriculture, 2
        • From 01 Apr. 2022, To 31 Mar. 2023
          Theory of Erosion Control
          BA11, Fall, Graduate School of Agriculture, 2
        • From 01 Apr. 2022, To 31 Mar. 2023
          Seminar in Erosion Control2
          BB31, Year-long, Graduate School of Agriculture, 4
        • From Apr. 2017, To Mar. 2018
          Laboratory Works in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2017, To Mar. 2018
          Laboratory Works in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2017, To Mar. 2018
          Seminar in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2017, To Mar. 2018
          Seminar in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2017, To Mar. 2018
          Practice of Basic Informatics (Faculty of Agriculture)
          Fall, 全学共通科目
        • From Apr. 2017, To Mar. 2018
          Laboratory Course in Forest Hydrology and Erosion Control
          Fall, 農学部
        • From Apr. 2018, To Mar. 2019
          Laboratory Works in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2018, To Mar. 2019
          Laboratory Works in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2018, To Mar. 2019
          Seminar in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2018, To Mar. 2019
          Seminar in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2018, To Mar. 2019
          Laboratory Course in Forest Hydrology and Erosion Control
          Fall, 農学部
        • From Apr. 2019, To Mar. 2020
          Laboratory Works in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2019, To Mar. 2020
          Laboratory Works in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2019, To Mar. 2020
          Seminar in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2019, To Mar. 2020
          Seminar in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2019, To Mar. 2020
          Basic Science for Forest and Biomaterials F
          Spring, 農学部
        • From Apr. 2019, To Mar. 2020
          Laboratory Course in Forest Hydrology and Erosion Control
          Fall, 農学部
        • From Apr. 2019, To Mar. 2020
          Laboratory Course in Applied Forest Science
          Spring, 農学部
        • From Apr. 2020, To Mar. 2021
          Laboratory Works in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2020, To Mar. 2021
          Laboratory Works in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2020, To Mar. 2021
          Seminar in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2020, To Mar. 2021
          Seminar in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2020, To Mar. 2021
          Basic Science for Forest and Biomaterials F
          Spring, 農学部
        • From Apr. 2020, To Mar. 2021
          Laboratory Course in Forest and Biomaterials Basic Science II
          Fall, 農学部
        • From Apr. 2020, To Mar. 2021
          Laboratory Course in Forest and Biomaterials Basic Science I
          Year-long, 農学部
        • From Apr. 2020, To Mar. 2021
          Laboratory Course in Forest Hydrology and Erosion Control
          Fall, 農学部
        • From Apr. 2020, To Mar. 2021
          Laboratory Course in Applied Forest Science
          Year-long, 農学部
        • From Apr. 2021, To Mar. 2022
          Laboratory Works in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2021, To Mar. 2022
          Laboratory Works in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2021, To Mar. 2022
          Seminar in Erosion Control1
          Year-long, 農学研究科
        • From Apr. 2021, To Mar. 2022
          Seminar in Erosion Control2
          Year-long, 農学研究科
        • From Apr. 2021, To Mar. 2022
          Basic Science for Forest and Biomaterials F
          Spring, 農学部
        • From Apr. 2021, To Mar. 2022
          Laboratory Course in Forest and Biomaterials Basic Science II
          Fall, 農学部
        • From Apr. 2021, To Mar. 2022
          Laboratory Course in Forest and Biomaterials Basic Science I
          Spring, 農学部
        • From Apr. 2021, To Mar. 2022
          Laboratory Course in Forest Hydrology and Erosion Control
          Fall, 農学部
        • From Apr. 2021, To Mar. 2022
          Laboratory Course in Applied Forest Science
          Spring, 農学部

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