鳥取県中部にある小鹿川流域で,岩盤侵食河川(渓流)の侵食速度と縦断形の成り立ち,深層崩壊に伴う天然ダムの形成と決壊の地形痕跡,甌穴群の成り立ち,渓谷がある川と渓谷がない川の分水嶺の特徴等を巡検し,現地討論をします.
In the Oshika River basin in central Tottori Prefecture, we will tour and hold on-site discussions to examine the erosion rate and longitudinal profile of bedrock erosion rivers (mountain streams), the formation of natural dams induced by deep-seated landslides, the topographical traces of their collapse, the formation of potholes, and the characteristics of watersheds between rivers with gorges and those without.
2024年11月4日(月)
8:00 鳥取駅南口 フコク生命ビル前
集合場所
8:00 鳥取駅南口フコク生命ビル前
9:30 三朝町小鹿川流域入口・低位段丘面
小鹿川沿いをバスで観察
10:00[Stop 1]西小鹿・東小鹿の深層崩壊に伴う段丘状地形
11:15[Stop 2]丹戸橋から名勝小鹿渓へ
徒歩移動、途中お弁当休憩
渓流地形の成り立ち,渓相と縦断勾配の関係,粗度の役割,小鹿渓の下刻速度の縦断分布,神縄滝・玉藻滝・水晶滝,滝-滝壺連続区間の成り立ち
13:00[Stop 3]神倉の天然ダム堤を侵食した段丘堆積物
13:30[Stop 4]神倉の天然ダム決壊時の急勾配段丘面
14:00[Stop 5]高釜の甌穴群
河川侵食過程における甌穴群の成り立ち ,2023年8月15日台風7号の異常水位上昇痕跡
15:00 国宝「三徳山投入堂」経由で三徳渓谷と俵原
15:30[Stop 6]河内川流域(佐谷Parking)
渓谷のある川とない川
17:30 鳥取空港着 解散
18:00 鳥取駅着 解散
小玉芳敬(鳥取大学),渡壁卓磨(森林総合研究所),星野賢史(鳥取大学・院)
貸切バスで移動します.
・当日は貸し切りバスで移動します.
・弁当・飲み物を持参してください.
巡検参加申し込みサイトからお申込み下さい.
Date
Monday, November 4, 2024
Meeting/Departure
8:00 a.m. at Tottori Station South Exit, in front of Fukoku Seimei Building
Dissolution
17:30 at Tottori Airport
18:00 at Tottori Station
Itinerary
Tottori Station South Exit (8:00) → Entrance to the Oshika river basin in Misasa town/Low terrace surface → [Stop 1] Terrace-like landforms induced by the deep-seated landslides of Nishi-Oshika and Higashi-Oshika → [Stop 2] From Tando bridge to the scenic spot Oshika-kei (Lunch break en route) → [Stop 3] Terrace deposits that eroded the Kamikura natural dam embankment → [Stop 4] Steep terraces caused by the collapse of the Kamikura dam → [Stop 5] Takakama potholes → Mitoku valley and Tawarahara via the national treasure "Mitokusan Nageiredo] → [Stop 6] Kawachi river basin (Saya Parking) → Tottori Airport (17:30) → Tottori Station (18:00)
Guide leader
Yoshitaka KODAMA (Tottori Univ.), Takuma WATAKABE (FFPRI) and Kenji HOSHINO (Tottori Univ., Graduate Student)
Important notice
- We will travel by a chartered bus on that day.
- Please bring your lunch and drinks.
Participants
50 (FCFS)
Registration
Please apply from the application site.
https://docs.google.com/forms/d/e/1FAIpQLSeNi8Qp8cW0-eBvj5On_WGfsZ1J6xFX4Eby5QaLtRhS8kybLA/viewform