Article
Version 1
Preserved in Portico This version is not peer-reviewed
Mobility and Location of Drainage Divides Affected by Tilting Uplift in Sado Island, Japan
Version 1
: Received: 22 December 2022 / Approved: 26 December 2022 / Online: 26 December 2022 (06:41:43 CET)
A peer-reviewed article of this Preprint also exists.
Sakashita, A.; Endo, N. Mobility and Location of Drainage Divides Affected by Tilting Uplift in Sado Island, Japan. Remote Sens. 2023, 15, 729. Sakashita, A.; Endo, N. Mobility and Location of Drainage Divides Affected by Tilting Uplift in Sado Island, Japan. Remote Sens. 2023, 15, 729.
Abstract
Drainage divide is a dynamic feature that migrates in response to tectonic activity. The asymmetric uplift between two adjacent basins causes the divide migration from a slower to faster uplift area. Sado Island, Japan, has been affected by southeastward tilting uplift since ca. 300k years. Despite the faster uplift on the northwest, the main divides have existed on the southeast side of the geometric center of the island, with no other feature suggesting tectonic inversion of the tilting direction. In this study, we conducted a DEM-based investigation that focused on divide migration. A spectrum from very inactive to active divide migration in the northwest. Regardless of their position, actively migrating divides are comprehensible, but inactive divides located in a relatively slow uplift area remain unclear. We concluded that some divides slowed down owing to the local balance of erosion rates across the divides, not implying the balance between uplift and river erosion at the basin scale, reflecting disequilibrium in river longitudinal profiles. The main divides of Sado have presumably continued to slowly migrate toward the faster uplift area; however, they are most likely to have never overcome the moving geometric center owing to land expansion at the seacoast due to asymmetric uplift.
Keywords
Sado Island; divide migration; tilting uplift; stream capture; geomorphic indexes; topographic analysis
Subject
Environmental and Earth Sciences, Geophysics and Geology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment