제주도 지역의 침투집수정 시설의 설치효과 분석

Abstract

Recently, runoff is increased suddenly due to heavy rainfall and development, for this, the damages are increasing. So although the runoff reduction facilities are installed for preventing this damage, the proper infiltration equation in soil condition of Jeju area isn't made exactly. So the purpose of this study is to compare between infiltration from in situ test and original infiltration equation. permeameter test and infiltration test were conducted for 1 infiltration bucket and 8 infiltration collector well in 4 area. For permeameter test, coefficient of permeability was estimated from Borehole Test with Constant Water Level. Also critical infiltration was obtained from infiltration test. The results of permeameter test was from 8.61E-02 to 9.70E-01(cm/sec), permeability was very high. Also critical infiltration was from 17.11 to 287.1(㎥/hr), high infiltration effect was obtained. On the other hand, the results between infiltration from infiltration test and from original infiltration equation were great different from 21.31 to 212.7㎥/hr. Therefore Kt which has a fluent of infiltration area based on results obtained from infiltration test was proposed as an exponential function. Although the equation represented as an exponential function can't estimate exact infiltration due to few data, if more infiltration tests are conducted in the future, proper infiltration equation to Jeju area will be made.