Preliminary Study on the Water Environment in Jeju Island, Korea
| Jazyk: | japonština |
|---|---|
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | 法政大学文学部紀要 = Bulletin of the Faculty of Letters, Hosei University. 80:65-80 |
| ISSN: | 0441-2486 |
| Popis: | 長年，日本国内の島嶼や火山地域の水環境の調査・研究を続けてきたが，特に最近は長崎県の島嶼に力を入れ，五島列島，壱岐，平戸，対馬と継続的な調査を行ってきた。また，かつて行った伊豆諸島に関する研究では，最終火山活動期と水質の関係を示すことができており，火山島であり対馬に近い済州島を比較研究する機会を待っていた。幸いにして2018年12月と2019年6月に調査する機会を得たので，その概要を報告する。済州島は，全島をほとんど溶岩流が覆う火山島であるため，降水量の多い地域でありながら伏流河川が多いが，ある程度流れのある河川を調査することができた。島の地域によっては，伏流しやすい河川が多かったり，地表流として流れる河川が多いなど，分布が分かれている。また，人口の多い都市域や，農地の周辺を流れる河川では，その人為的影響が河川に及んでいることが明らかとなった。さらに，済州島での調査結果を受けて伊豆諸島三宅島での調査・研究を再開したので，直近のデータとして比較のために提示した。今後は，済州島に関する統計情報・GISデータ等を収集・整理し解析を進めるとともに，多雨期や，山頂域での調査も検討したい。また，日本の火山島との比較研究も平行して進めるつもりである。 For many years, I have continued to investigate and study the water environment of islands and volcanic areas in Japan. Recently, I have been focusing on the islands of Nagasaki Prefecture, and have been conducting ongoing surveys with the Goto Islands, Iki, Hirado and Tsushima. In the previous study on the Izu Islands, I was able to show the relationship between the last volcanic activity period and water quality, and I waited for the opportunity to conduct a comparative study of Jeju Island, which is a volcanic island and close to Tsushima. Fortunately, I had the opportunity to investigate in December 2018 and June 2019, so I will report on the outline.Jeju Island is a volcanic island that is almost entirely covered by lava flow, so there are many underflow rivers in spite of precipitation, but it was possible to investigate rivers with some flow. Depending on the area of the island, there are many rivers that tend to flow down, and there are many rivers that flow as surface currents. In addition, in the urban area with large population and the river flowing around the farmland, it became clear that the anthropogenic influence is affecting the river.Furthermore, the survey and research at Miyakejima, Izu Islands, was resumed in response to the survey results at Jeju Island, and the latest data was presented for comparison. In the future, I will collect and organize statistical information and GIS data on Jeju Island, and proceed with the analysis. I will also investigate surveys in the rainy season and the summit area. In addition, I intend to proceed with a comparative study with Japanese volcanic islands. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|