＜Review＞

Integrity of river basin environment based on the biogeochemical cycle between the terrestrial and coastal area

Yasuyuki MARUYA^*1, NAGAI Shin^*2, Satoshi WATANABE^*3, Yuichiro FUJIOKA^*3

^*1Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
^*2Earth Surface System Research Center, Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-ku, Yokohama 236-0001, Japan
^*3Faculty of Social and Cultural Studies, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan

Abstract

Recently, climate and social change have impacted on the river basin environment, it is important to conserve a sustainable river basin environment. However, in previous studies, the evaluation of the integrity of river basin has not been examined adequately. Therefore, we made an attempt to propose the method which is necessary to estimate the biogeochemical cycle between the terrestrial and coastal area in long-term for the Shiretoko Peninsula has a unique biogeochemical cycle system as a target field. We compiled the challenges and the perspective based on "climate and social change from previous to the current" and "the estimation method of the biogeochemical cycle between the terrestrial and coastal area" in this paper.

Key Words : climate change; social change; river basin, biogeochemical cycle between terrestrial and coastal area; Shiretoko peninsula

(Received December 16, 2022. Accepted July 9, 2023)