Author(s): Ryoukei Azuma; Kohei Watanabe

Linked Author(s): Ryokei Azuma

Keywords: Sediment budget analysis; Beach erosion; Fluvial supply; Littoral drift; Shinano River

Abstract: Beach erosion has been a serious issue worldwide, owing to evolving fluvial supply and complex littoral dispersal. Japan’s archipelago is no exception for this. It has recently undergone the loss of aerial beach area at a rate of approximately 160ha per year (Tanaka et al., 1993). This study aims to investigate the sediment budget at the Teradomari-Nozumi Coast located in the estuary of the diversion channel of the Shinano River. The Teradomari-Nozumi Coast was originally a rocky coast, but after the diversion channel was completed in 1910, a sandy beach was formed extensively. Therefore, the receptacle for the sandy sediment, which is the initial condition, is clear, and it is a perfect pilot study area for assessing the amount of fluvial sediment supply. As a result, the total sediment volume of littoral drift in this coastal area is estimated 160×10

DOI: https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p0277-cd

Year: 2023