SHINYA NAKASHITA

Last Updated :2021/04/06

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Assistant Professor
Web Site
E-mail
nakashitahiroshima-u.ac.jp
Other Contact Details
1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan, Japan
TEL : (+81)82-424-7818 FAX : (+81)82-424-7818
Self-introduction
I studied the relationship between the existence of groundwater flow several meters below the surface of the tidal flat and the water quality, bottom sediment, and biological habitat of the tidal flat in the Ota River estuary. Since then, I have been conducting research on identifying contained organic matter, measuring the amount of resuspension, and reducing water retention for the purpose of improving the bottom sediment.

Basic Information

Major Professional Backgrounds

  • 2011/04/01, 2011/05/31, Hiroshima University, Institute of Engineering, Assistant Professor (Special Appointment)
  • 2011/06/01, 2020/03/31, Hiroshima University, Institute of Engineering, Assistant Professor

Educational Backgrounds

  • Hiroshima University, Japan, 2008/04, 2011/03
  • Hiroshima University, Japan, 2006/04, 2008/03
  • Hiroshima University, Japan, 2004/04, 2006/03

Academic Degrees

  • Doctor of Engineering, Hiroshima University
  • Master of Engineering, Hiroshima University

Educational Activity

  • 【Bachelor Degree Program】School of Engineering : Cluster 4(Civil Engineering and Architecture)
  • 【Master's Program】Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Civil and Environmental Engineering Program
  • 【Doctoral Program】Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Civil and Environmental Engineering Program

In Charge of Primary Major Programs

  • Civil and Environmental Engineering

Research Fields

  • Engineering;Civil engineering;Hydraulic engineering

Research Keywords

  • Tidal flat
  • Groundwater
  • Environmental reclamation
  • Water quality
  • Sediment
  • Ota River estuary
  • Hiroshima Bay
  • Granulated coal ash

Affiliated Academic Societies

  • Japan Society of Civil Engineers, 2004
  • Japan Society of Hydrology and Water Resources, 2016

Educational Activity

Course in Charge

  1. 2021, Undergraduate Education, 3Term, Basic Engineering Computer Programming
  2. 2021, Undergraduate Education, 3Term, Exercise of Hydraulics
  3. 2021, Undergraduate Education, 1Term, Exercise of Surveying
  4. 2021, Undergraduate Education, 2Term, Experiments in Civil and Environmental Engineering
  5. 2021, Undergraduate Education, 3Term, Design of Infrastructures
  6. 2021, Graduate Education (Master's Program) , First Semester, Civil and Environmental Engineering Research IIB
  7. 2021, Graduate Education (Master's Program) , First Semester, Civil and Environmental Engineering Seminar IIB
  8. 2021, Graduate Education (Master's Program) , 1Term, Special Exercises on Civil and Environmental Engineering A
  9. 2021, Graduate Education (Master's Program) , 2Term, Special Exercises on Civil and Environmental Engineering A
  10. 2021, Graduate Education (Master's Program) , 3Term, Special Exercises on Civil and Environmental Engineering B
  11. 2021, Graduate Education (Master's Program) , 4Term, Special Exercises on Civil and Environmental Engineering B
  12. 2021, Graduate Education (Master's Program) , Academic Year, Special Study on Civil and Environmental Engineering

Research Activities

Academic Papers

  1. ★, Temporal variations of groundwater salinity and temperature in a tidal flat in front of a tide pool, CONTINENTAL SHELF RESEARCH, 122, 29-35, 20160701
  2. Variation in properties of the sediment following electrokinetic treatments, Environmental Technology, 2016
  3. GROUNDWATER FLOW AND TRANSPORTATION OF SUSPENDED SUBSTANCE IN GRANULATED COAL ASH LAYER, Journal of JSCE, Ser.B3, civil engineering in the ocean, 71, 1089-1094, 2015
  4. Study on Moving Characteristic of Mixed-sized Granulated Coal Ash, Journal of JSCE, Ser.B3, civil engineering in the ocean, 71, 305-310, 2015
  5. DRY COMBUSTION-BASED METHOD FOR EVALUATING VARIATION OF ORGANIC MATTER STATE IN SEDIMENT, Journal of JSCE, Ser.B2, coastal engineering, 71(2), 1417-1422, 2015
  6. MEASUREMENT OF MUD FLOC-SETTLING VELOCITY USING A LASER DIFFRACTION PARTICLE SIZE DISTRIBUTION ANALYZER, COASTAL ENGINEERING JOURNAL, 56(3), 1450012/1-1450012/16, 201409
  7. ESTIMATION OF SETTLING VELOCITY AND CHARACTERISTICS OF PARTICLE-WATER INTERFACE ON ORGANIC MUD IN A BRACKISH LAKE, Journal of JSCE, Ser.B1, hydraulic engineering, Vol.70(No.4,), 1585-1590, 20140301
  8. DEVELOPMENT OF A NEW COUNTERMEASURE FOR EROSION OF THE ARTIFICIAL BED MATERIALS MADE OF FLY ASH BEADS, Journal of JSCE, Ser.B3, civil engineering in the ocean, Vol.70, 774-779, 201406
  9. ★, Long term variation of unconfined and confined groundwater level and quality in Ota River estuary, Journal of JSCE, Ser.B2, coastal engineering, Vol.70, 1216-1220, 201411
  10. ★, Variances in Properties of Diffused and Accumulated Lipids in Littoral Regions, Journal of JSCE, Ser.B2, coastal engineering, Vol.70( No.2), 1086-1090, 201411
  11. Classification of the Organic Matter Existing in Littoral Sediments, Journal of JSCE, Ser.B2, coastal engineering, Vol.70( No.2), 1101-1105, 201411
  12. Permeability Reduction by Sediment Retention in Saturated Sand Columns, TRANSPORT IN POROUS MEDIA, 98(3), 615-630, 20130701
  13. The Benthic Habitat in a Brackish Tidal Flat,, Proceedings of the 12th international conference on Civil and Environmental Engineering, 226-271, 20131101
  14. ★, Water Circulation between Unconfined Aquifer and Tidal Flat in Tidal River, Journal of JSCE, Ser.B2, coastal engineering, Vol.69, 1216-1220, 20131101
  15. Formation of Reduced Conditions of Sea Bottom Sediment in Yong-Won Bay, Korea, Journal of JSCE, Ser.B2, coastal engineering, Vol.69,, 1136-1140, 20131101
  16. ★, INFLUENCE OF REGIONAL GROUNDWATER ON TIDAL FLAT GROUNDWATER ENVIRONMENT IN OTA RIVER DELTA, Journal of JSCE, Ser.B1, hydraulic engineering, Vol.69(No.4), 547-552, 20130301
  17. PERMEABILITY CHANGE OF SAND BEDS DUE TO SEDIMENT MIGRATION UNDER SEEPAGE FLOW WITH OSCILLATING WATER HEAD CONDITION, Journal of JSCE, Ser.B1, hydraulic engineering, Vol.69(No.4), 559-564, 20130301
  18. STUDY ON THE PROPERTIES OF DEPOSITED SEDIMENT IN ESTUARINE REGION CONSIDERING THE DECOMPOSITION PROCESS OF ORGANIC MATTER, Journal of JSCE, Ser.B1, hydraulic engineering, Vol.69(No.4), 1417-1422, 20130301
  19. ★, EELGRASS BED PROMOTION PROCESS AND RETENTION MECHANISM ON THE CONSTRUCTED ARTIFICIAL BED WITH GRANULATED FLY ASH, Journal of JSCE, Ser.B3, civil engineering in the ocean, Vol.69( No.2), 1072-1077, 20130601
  20. Changes in Sediment Conditions and Organic Decomposition in Sediment Microbial Fuel Cells, Journal of JSCE, Ser.B2, coastal engineering, Vol.69, 1106-1110, 20131101
  21. Modeling of resuspension mechanism of deposited organic mud in the tidal estuary, , Adv. in River Sediment Research, 140-140, 20130901
  22. Deposition Behavior of Mud in Sand Beds Under the Effects of Organic Properties, TRANSPORT IN POROUS MEDIA, 91(2), 531-546, 20120101
  23. Influence of organic properties and hydraulic conditions on migration behavior of mangrove sediment in a subtropical estuary of Brisbane River, World Water Congress & Exhibition, 16-21, 20120901
  24. ★, ESTIMATION OF SEPARATING RATIO OF FRESHWATER IN A TIDAL RIVER, Journal of JSCE, Ser.B1, hydraulic engineering, Vol.68(No.4), 1597-1602, 20120301
  25. MODEL OF PERMEABILITY REDUCTION DUE TO MUD DEPOSITION IN THE PORES OF SAND BEDS, Journal of JSCE, Ser.B1, hydraulic engineering, Vol.68(No.4), 547-552, 20120301
  26. STUDY ON STABILITY OF ARTIFICIALY FORMED SEA BED USING FLY ASH BEADS FOUNDATION UNDER WAVE AND CURRENT, Journal of JSCE, Ser.B3, civil engineering in the ocean, Vol.68(No.2), 594-599, 20120601
  27. Study of Upwelling of Suspended Substance with Density Inversion, Journal of JSCE, Ser.B2, coastal engineering, Vol.68, 1011-1015, 20121101
  28. Method for Predicting the Effective Density of Sediment Based on Settling Characteristics and Fractal Structures, Journal of JSCE, Ser.B2, coastal engineering, Vol.68, 1031-1035, 20121101
  29. Retention Model of Sediment under Groundwater Flow in Sand Beds, Journal of JSCE, Ser.B2, coastal engineering, Vol.68, 1086-1090, 20121101
  30. Mechanism of water exchange at the sediment-water interface in a tidal estuary, Proceedings of the 34th IAHR World Congress, 1085-1092, 20110601
  31. Influence of River Structure on the Groundwater Environment in Estuarine Tidal Flat, Proceedings of the 10th international conference on Civil and Environmental Engineering, 376-382, 20111101
  32. Capture and Clogging Behavior of Organic Mud in Sand Beds, Proceedings of the 6th International Conference on Asian and Pacific Coasts, 1030-1037, 20111201
  33. EFFECT OF ORGANIC PROPERTIES ON THE MUD MOVEMENT IN THE POROUS MEDIA OF SAND, Journal of JSCE, Ser.B1, hydraulic engineering, 特別号, 1681-1686, 20110301
  34. SOIL ENVIRONMENT AND INFILTRATION FLOW. IN TIDAL FLAT AT RIVERBANK OF A COMPOUND CHANNEL, Advances in river engineering, 第17巻, 173-178, 20110701
  35. Modeling of Resuspension Mechanism of Deposited Organic Mud in the Tidal Estuary, Journal of JSCE, Ser.B2, coastal engineering, Vol.67, 1146-1150, 20111101
  36. Effects of Flow Rate and Pore Size on Mud Transport in Sand Beds, Journal of JSCE, Ser.B2, coastal engineering, Vol.67, 971-975, 20111101
  37. Physical and Chemical Property of High Turbidity Layer Formed near the Sea Bottom, Journal of JSCE, Ser.B2, coastal engineering, Vol.67, 861-865, 20111101
  38. Influence of Organic Properties and Hydraulic Conditions on Sediment in a Tropical Tidal River, Journal of JSCE, Ser.B2, coastal engineering, Vol.67, 996-1000, 20111101
  39. Burning Characteristic of Organic Matter deposited on Sea Bottom Sediment, Journal of JSCE, Ser.B2, coastal engineering, Vol.67, 1156-1160, 20111101
  40. ★, INFLUENCE OF UNDERGROUND STRUCTURE ON THE GROUND WATER AND SEDIMENT ENVIRONMENT IN AN ESTUARINE TIDAL FLAT, Advances in river engineering, 第16巻, 185-190, 20100601
  41. Effect of Salinity on Settling Process of Suspended Organic Matter, Journal of JSCE, Ser.B2, coastal engineering, Vol.66(No.1), 1156-1160, 20101101
  42. ★, Study on living of mahogany clams under the deposited sand, Journal of JSCE, Ser.B2, coastal engineering, Vol.66(No.1), 1086-1090, 20101101
  43. An Experimental Study on Organic Fine Particles Movement in a Sand Column, Journal of JSCE, Ser.B2, coastal engineering, Vol.66(No.1), 1076-1080, 20101101
  44. ★, STUDY ON ECOLOGICAL ENVIRONMENT OF TIDAL FLAT IN THE OTA RIVER FLOODWAY, Journal of JSCE, Ser.B, Vol.66(No.4), 344-358, 20101101
  45. Variations in Groundwater Levels and Salt Infiltration in a Tidal Flat with a Tidal Cycle, Proceedings of International Conference on Civil and Environmental Engineering, 49-49, 20091001
  46. Characteristics of Water Circulation between Fluvial and Coastal Aquifers in a River Delta, Proceedings of International Conference on Civil and Environmental Engineering, 88-88, 20091001
  47. Friction Loss and the Permeability of Packed Sand, Proceedings of International Conference on Civil and Environmental Engineering, 47-47, 20091001
  48. Variation of Groundwater Quality in a Tidal Flat, Proceedings of the Fifth International Conference on Asian and Pacific Coasts, Vol.4, 1-8, 20091015
  49. The Role of Groundwater Flow in a Tidal Flat Environment, Proceedings of the Fifth International Conference on Asian and Pacific Coasts, Vol.1, 302-307, 20091015
  50. Groundwater Level Variation and Salt Infiltration in a Tidal Flat with Tidal Cycle, Journal of JSCE, Ser.B2, coastal engineering, 第56巻, 1161-1165, 20091101
  51. Study on Circulation Mechanism between Hyporheic Water and Wide Area Groundwater in a Tidal Estuary, Journal of JSCE, Ser.B2, coastal engineering, 第56巻, 1156-1160, 20091101
  52. Influence of Coastal Groundwater on Brackish Water Environment in a Tidal Estuary, Proceedings of the International Conference on Coastal Engineering, 4562-457, 20080901
  53. Mechanism of Organic Matter Movement Caused by Groundwater Flow in a Tidal Flat, Proceedings of International Conference on Civil and Environment Engineering, 39-39, 20081015
  54. Investigation of Water Exchange in a Hyporheic Zone in a Tidal Estuary, Proceedings of International Conference on Civil and Environment Engineering, 53-53, 20081015
  55. VARIATION CHARACTERISTICS OF GROUNDWATER QUALITY IN TIDAL FLAT DURING FLOOD PERIOD, Journal of JSCE, Ser.B1, hydraulic engineering, 第52巻, 1081-1086, 20080201
  56. WATER EXCHANGE THROUGH RIVERBED IN A TIDAL RIVER, Journal of JSCE, Ser.B1, hydraulic engineering, 第52巻, 1315-1320, 20080201
  57. Mechanism of Fine Particles Movement Caused by Groundwater Flow in Tidal Flat, Journal of JSCE, Ser.B2, coastal engineering, 第55巻, 1276-1280, 20081001
  58. The Characteristics of Organic Matters Circulation in Hiroshima Bay, Proceedings of the Fourth International Conference on Asian and Pacific Coasts, 2051-2062, 20070901
  59. The Groundwater Flow Mechanism in The Ota River Estuary and The Formation of High Turbidity Layer in Hiroshima Bay, Proceedings of the Fourth International Conference on Asian and Pacific Coasts, 968-979, 20070901
  60. ★, Characteristics of Groundwater Flow and Tidal Flat formed by River Structure in the Estuary, Journal of JSCE, Ser.B2, coastal engineering, 第54巻, 1246-1250, 20071001
  61. Characteristics of Groundwater Flow and Tidal Flat Formed by River Structures in the Ota River Estuary, Proceedings of International Conference on Civil and Environmental Engineering, 39-39, 20071015
  62. A pilot study on remediation of muddy tidal flat using porous pile, MARINE POLLUTION BULLETIN, 114(2), 837-842, 20170130
  63. Evaluation of Granulated Coal Ash as Artificial Seabed for Eelgrass, JOURNAL OF COASTAL RESEARCH, 40-44, 2017
  64. Variation in properties of the sediment following electrokinetic treatments, Environmental Technology, Vol.38(No.3), 277-284, 2017
  65. Influence of Kuroshio Path on Salinity Distribution in Seto Inland Sea, JOURNAL OF COASTAL RESEARCH, 21-25, 201805
  66. Enhanced power performance of an in situ sediment microbial fuel cell with steel-slag as the redox catalyst: I. electricity generation, SUSTAINABLE ENERGY & FUELS, 4(3), 1363-1371, 20200301

Invited Lecture, Oral Presentation, Poster Presentation

  1. Evaluation of granulated coal ash as artificial seabed for eelgrass, Shinya Nakashita, Kenji Nakamoto, Yoshinori Kosikawa, Kyung-hoi Kim, Tadashi Hibino, 2nd International Water Safety Symposium, 2016, Without Invitation, English, IWSS Local Organization Committee, Busan, Korea
  2. Role of groundwater flow in formation of tidal flat environment, Shinya Nakashita, 39th Ocean Engineering Conference, 2017/11/16, With Invitation, English, Taiwan

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, Sedimentation process on organic settling matter in brackish lake in cold region, 2012, 2014
  2. KAKENHI, Realization of sediment remediation in Busan New Port and Establishment of foundations for transferring water environment-restoration technology into Asian, 2012, 2014
  3. KAKENHI, 2015, 2016
  4. KAKENHI, 2015, 2018
  5. KAKENHI, 2015
  6. KAKENHI(Grant-in-Aid for Young Scientists (B)), 2017, 2018