2023 Fiscal Year Final Research Report
Risk assessment of ground disasters and heavy rain disasters and verification of hazard maps through integrated physical geography research
| Project/Area Number |
20K01140
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 04010:Geography-related
|
|---|
| Research Institution | Gunma University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2020-04-01 – 2024-03-31
|
| Keywords | 洪水 / 液状化 / 土地履歴 / 歴史災害 / 災害碑 |
|---|
| Outline of Final Research Achievements |
This study verified flood disasters of the 2019 East Japan Typhoon (Typhoon No. 19) and liquefaction disaster of the 2024 Noto Peninsula earthquake. In Higashimatsuyama City, Saitama Prefecture, the lowland were inundated during the 2019 East Japan Typhoon (Typhoon No. 19). Inundation in the study area was limited to lowland areas, and the inundation area was almost within the expected inundation area on the flood hazard map. The area near the confluence of the Tokigawa River and OppeOppe River is an area where "weak levees" with lower height and narrower levee bodies than the surrounding area remained. This study also clarified the distribution of liquefied sites, its topographical conditions and land history during the 2024 Noto Peninsula
|
| Free Research Field |
自然地理学，地形学
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究においては，近年頻発している洪水災害における浸水地域の地形条件や土地利用変化，ハザードマップとの関係，水害履歴，治水対策の経緯などとの関係を明示することができ、今後優先的に水害対策を行うべき地点の抽出や土地利用のあり方，水害リスク評価などに貢献できるものである。歴史災害の被災教訓を明らかにし，提示することは，地域防災に資するものとなる。液状化災害に関しては，2024年能登半島地震における液状化発生域の分布やその地形条件，土地履歴などについて新潟県，富山県、石川県の複数地域で明らかにすることができ，その成果は今後の液状化危険度評価，液状化ハザードマップの精度向上などに資するものである。
|
