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진기옥,양성기 제주대학교 해양과환경연구소 2001 해양과환경연구소 연구논문집 Vol.25 No.-
As the quality of life and tourism have improved, various facilities have been established on hillsides which have excellent views and consequentiy development of groundwater has been promoted. At present the number of developed groundwater wells the in Jeju island is around 5,100 and 245 of them are located in the mountainous area whose altitude varies from 200m to 600m. Since the development and usage of groundwater on hillsides have stared activated, the detailed investigation of groundwater characteristics, such as the distribution of geologic stratum, understanding of hydraulic properties, the content and the amount of gainable groundwater, has been investigated required. In this study, the hydraulic characteristics are examined through the evaluation of drawdown and transmissibility based on the distributive type of geologic stratum in the mountains. Classes of 201∼300m, 301∼400m, 401∼500m and 501∼600m show transmissivities of 183.5㎡/d, 41.11㎡/d, 631.02㎡/d and 1,162.65㎡/d respectively, which means that transmissivity increases as elevation grows. Their average value is 292.19㎡/d, higher than 201.8㎡/d that is estimated from data of 279 wells which have developed in lowlands until 1998.