Host: The Association of Japanese Geographers
Name : Annual Meeting of the Association of Japanese Geographers, Spring 2020
Date : March 27, 2020 - March 29, 2020
Field river surveys were conducted 23 times from May 2017 to October 2019.
This paper clarifies the formation of water quality by geological distribution and human influence (Effects of Fertilization and Household Wastewater from Agriculture) by treating not only rivers affected by strong acid drainage but also mountain streams, lakes and ponds and precipitation far from craters. In addition, in order to properly evaluate the impact of an eruption on environmental water, it is important to understand the state of the water environment around the volcanic body in normal times, and it is necessary to continue the investigation in the future.