『각사등록』에 의한 조선시대 경기도지역 측우기 우량 관측자료 복원 및 분석(1830~1893)

Abstract

Chugugi and Wootaeck rainfall data of Gyeonggi Province from 1830 to 1893 wererestored from the 『Gaksadeungnok』 that is the government records between the central governmentand the local during the Joseon Dynasty. The restored data periods were 27, 10, 9 and14 years for Kwangju, Suwon, Ganghwa and Gaeseong, and the total number of restored datawas 655 for the Chugugi and 427 for the Wootaek, respectively. The variation pattern ofmonthly rainfall by Chugugi was investigated and it showed that the monthly rainfall morethan 300 mm was recorded 25 times with 18 times in July, 5 times in August and 3 times inJune. The cases of more than 500 mm were also recorded 8 times with the maximum 787 mmat the Kwangju in July 1862, showing the similar pattern to Seoul. The monthly mean rainfallfor the Gyeonggi Province were 259 mm in July, 204 mm in August and 121 mm in June,which were about one third of that of Seoul. The correlation analysis between the Chugugi andWootaek data was carried out to derive the quantitative values of Wootaek observations. Itrevealed that 1 ‘Ri’ of Wootaek observation was equal to approximately 1 ‘Chon (Chugugiunit)’ or 20 mm, while 1 ‘Seo’ was very variable between 2 and 6 ‘Boon (Chugugi unit)’ withthe median value approximately 3 ‘Boon’ or 6 mm. Recalculated Wootaek data showed that themonthly rainfall in July, August, and June were 289 mm, 154 mm, and 124 mm, respectively. Through this study, some features of the rainfall variation pattern during 1830~1893 were figuredout, and quantitative interpretation of Wootaek data became possible based on the restoredrainfall data from the 『Gaksadeungnok』. Though many pages of the book have been lost duringthe last hundreds years, 『Gaksadeungnok』 is still very meaningful and of practical use, forit contains plenty of the local data throughout the whole country during the latter part of JoseonDynasty. Therefore, further studies are strongly recommended on the restoration of climaterelated data and on the climatic tendency of 19th century of Korean peninsular.