Response of mountainous rivers to uplift: laboratory experiments

2016 Fiscal Year Final Research Report

• Project/Area Number: 25350424
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geography
• Research Institution: Kanazawa University
• Principal Investigator: Endo Noritaka 金沢大学, 自然システム学系, 助教 (60314358)
• Co-Investigator(Renkei-kenkyūsha): MATSUSHI Yuki 京都大学, 防災研究所, 准教授 (90596438) ; YANAGITA Tatsuo 大阪電気通信大学, 工学部, 教授 (80242262)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 山地河川 / 岩盤河床 / 隆起 / 室内モデル実験

Outline of Final Research Achievements

Developmental processes of mountainous rivers has not been well understood in comparison to alluvial rivers on plains. In this study, laboratory (model) experiments were conducted under two types of uplift: (1) uplift only in a midstream area and (2) tilting uplift over the whole basin (uplift rate increases landward). Under (1), whether the stream continues to flow inside the uplift area or abandons the uplift area is not determined only by the balance between incision and uplift rates, but controlled by complex reaction due to change in channel networks in surrounding areas. Under (2), difference between timings of long-profile development of a trunk channel and tributaries is unclear in comparison to the case of no uplift.

Free Research Field

地形学