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1998 Fiscal Year Final Research Report Summary

Natural and Cultural Histories of San'in Region

Research Project

Project/Area Number 07409006
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 広領域
Research InstitutionShimane University

Principal Investigator

TOKUOKA Takao  Shimane Univ., Fac.Sci.& Eng.Prof., 総合理工学部, 教授 (30025358)

Co-Investigator(Kenkyū-buntansha) KAWASE Masatoshi  Hiroshima Univ., Fac.Lit., Associate Prof., 文学部, 助教授 (30093743)
NAKAYAMA Katsuhiro  Shimane Univ., Fac.Sci.& Eng., Associate Prof., 総合理工学部, 助教授 (20243420)
SAMPEI Yoshikazu  Shimane Univ., Fac.Sci.& Eng., Associate Prof., 総合理工学部, 助教授 (00226086)
YAMAUCHI Seiki  Shimane Univ., Fac.Sci.& Eng., Prof., 総合理工学部, 教授 (70032612)
TAKEHIRO Fumiaki  Shimane Univ., Resa.Center Coastal Lagoon Envi., Ass.Pro, 汽水域研究センター, 助手 (60252904)
Project Period (FY) 1995 – 1998
Keywordscoastal lagoon / Lakes Nakaumi and Shinji / halocline / saline wedge / Jomon / Transgression / IGBP-LOICZ / reclamation
Research Abstract

The main objects of the research are sea-level changes and synthetic studies on geographical, cultural, and social environments of lagoons, especially in Lakes Nakaumi and Shinji. The detailed geographic developments were reconstructed on the basis of drilling, core sampling and echo-sounding surveys and sea-level changes since 10,000 y.B.P.were discussed. Many lowland archaeological sites around Lakes Nakaumi and Shinji were reexamined from the view point of the Holocene sea level changes. The activities of our ancestors have been newly recognized as multi-sided using of the lakes as fishery ground, fishery ports and transportation bases. The surrounding lowland areas had provided convenient conditions for human activities especially for rice cultivation. These had made possible the prosperity of Paleo-Izumo. The effects of sea-level rise due to global warming on coastal lagoon areas such as salinity increase, salt water intrusion into freshwater aquifers, were examined. The depositional environment during the Holocene climatic optimum have been established from geochemical study of the sediment cores of Lake Nakaumi. The results will offer basic information for projections of lagoonal environments in future glob warming.
A long-term observation system for the study of Halocline behavior in coastal lagoons and estuaries has been developed. This system was successfully carried out in Lake Nakaumi and would contribute to control the movement of oxygen-free saline water in near future, The system was also successfully carried out at River Gonokawa in Shimane Prefecture, one of the most famous tidal rivers in Japan.
The Lake Nakaumi Reclamation Project, which was started in 1963, and have been suspected, are discussed from the view point of environmental sciences, and a program for wise use and balanced ecosystem has been proposed.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 徳岡隆夫 ほか7名: "感潮河川における塩水溯上観測システムの開発 : 江の川の塩水楔観測例" Techno-Ocean'98 International Symposium. 245-248 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.TOKUOKA et al.: "IMPROVING LAGOONAL ENVIRONMENTS FOR FUTURE GENERATIONS -A CASE STUDY OF LAKES NAKAUMI AND SHINJI, JAPAN." LAGUNA. 5. I-X (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 西村清和・鈴木重教・松田滋夫・久保田俊輔・須崎聡・徳岡隆夫: "汽水域における環境計測技術の開発" Techno-Ocean'98 International Symposium. 205-208 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 倉門由紀子・三瓶良和・高安克己・徳岡隆夫・井内美郎: "中海および浜名湖表層堆積物の有機炭素・窒素・イオウ濃度分布" LAGUNA. 5. 123-135 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 竹広文明・渡辺貞幸・会下和宏: "サルガ鼻燈台洞窟遺跡西岩陰地点も調査" LAGUNA. 5. 209-213 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 徳岡隆夫・三瓶良和・亀井健史 ほか5名: "江の川の塩水楔-塩水溯上の長期連続観測システムの開発-(予測)" LAGUNA. 5. 197-208 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Nishimura et al.: "Development of environmental measurement techniques in estuaries coastal lagoons" Techno-Ocean'98 International Symposium. 205-208 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Tokuoka, et al.: "Development of environmental measurement techniques for saline wedge behavior at eatuarine river : A case of River Gonokawa, Japan" Techno-Ocean'98 International Symposium. 245-248 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Tokuoka, et al.: "IMPROVING LAGOONAL ENVIRONMENT FOR FUTURE GENERATIONS -A CASE STUDY OF LAKES NAKAUMI AND SHINJI,JAPAN" LAGUNA. 5. I-X (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Kurakado, et al.: "Distribution of organic carbon, nitrogen and sulfur contens in surface sediments of brackish castal" LAGUNA. 5. 123-135 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Tokuoka, et al: "Saline wedge River Gonokawa-Development of long-term observation system of salinewedge behavior - (Preliminary report)" LAGUNA. 5. 197-208 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F.Takehiro et al.: "A study on the cave sites at Shimane Peninsula -the survey at location rock shelter on the west of Sarugahana Todai cave site, Mihonoseki Town, shima" LAGUNA. 5. 209-213 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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