첫째, 수도권 지하철역 내에 실내조경이 조성된 곳은 38개소로써 6.9% 였으며, 5개 광역시 실내조경 조성비율은 21.6%로 54개소로 나타났다. 5개 광역시 지하철역의 실내조경 조성비율은 부산광역시 26.7%, 광주광역시 20.0%, 대구광역시 11.6%, 대전광역시 18.2%, 인천광역시 10.3% 순이었다.
둘째, 실내조경이 조성된 지하철역 중 생화장식율과 조화장식율을 비교한 결과, 수도권 지하철역의 경우, 23개소로 생화장식율은 60.5%였으며, 5개 광역시 지하철역은 6개소로 11.1%에 불과하였다.
셋째, 생화로 장식된 수도권 지하철역과 광역시 지하철역의 실내조경 도입첨경물에 있어서, 지하철역 1개소당 보통 1∼3종류를 도입하는 것으로 나타났으며, 암석, 정원등, 분수, 물확, 석등, 연못, 조각품, 물레방아, 풍차 순으로 도입되고 있었다.
넷째, 생화장식용 도입수종은 총 45과 70속 93종이었다. 이 중 수도권 지하철역의 도입수종은 42과 67속 87종 이었으며, 5개 광역시 지하철역은 11과 16속 28종 이었다. 자생수종은 총 17과 20속 21종이었다.
다섯째, 식물높이에 따른 식물의 경관구성요소로써, 수도권 지하철역 도입수종은 상층식물 22종, 중층식물 15종, 하층식물 46종이었으며, 5개 광역시 도입수종은 상층식물 1종, 중층식물 5종 하층식물 18종 이었다. 즉, 수도권지하철역은 식물의 높이와 부피에 따른 볼륨감과 시각적 다양성을 제공하고 있는 반면, 5개 광역시의 경우 경관의 볼륨감과 다양성이 제대로 이루어지지 않은 실정이었다.
여섯째, 실내조경공간 활용에 있어서, 수도권지하철역은 ,미니도서관, 휴식공간, 매점 등과 연계하여 다양한 이용행태를 담는 반면, 5개 광역시의 경우 시각적 이미지만 담아내고 있어서 실내조경공간의 활용도를 다양하게 활성화 할 수 있는 방안모색이 필요한 것으로 파악된다.
This study examined the preparations carried out to establish indoor garden areas in Seoul metropolitan subway stations and in 5 other metropolitan cities subway stations in order to present findings on how these preparations might be improved.
The preparation ratio for indoor garden areas among Seoul metropolitan subway stations was 6.9%, 38 places, and the ratio overall for 5 metropolitan cities was 21.6%, 54 places. Among the 5 metropolitan cities, the ratio was 26.7% in Busan metropolitan city, 20.0% in Gwangju metropolitan city, 11.6% in Daegu metropolitan city, 18.2% in Daejeon metropolitan city, and 10.3% in Incheon metropolitan city. With regard to the results comparing the decoration ratio with natural flowers and artificial flowers among the prepared stations with indoor gardens, in the case of Seoul metropolitan area, places decorated with natural flowers numbered 23, and the ratio was 60.5%, but, in case of the 5 metropolitan cities, places decorated with natural flowers numbered just 6, and the ratio was just 11.1%. In the case of garden ornaments as material introduced in Seoul metropolitan area subway stations decorated with natural flowers and the 5 metropolitan cities subway stations, one to three kinds of ornament were introduced per each place, and the ornament items included rocks, garden lanterns, ponds, stone mortars, stone lamps, fountains, sculptures, mini water mills, and windmills. The introduced trees at subway stations in Korea that were decorated with natural flowers included 93 species of 70 genera of 45 families. The introduced trees included 87 species of 67 genera of 42 families in Seoul metropolitan area subway stations, and the introduced trees included 28 species of 16 genera of 11 families in the 5 metropolitan cities subway stations. Native trees included 21 species of 20 genera of 17 families. As for scenery formation elements according to the height of trees, in the case of Seoul metropolitan area, the introduced trees included 22 species of upper trees, 15 species of middle trees, and 46 species of lower trees. In the case of the 5 metropolitan cities, the introduced trees included 1 species of upper trees, 5 species of middle trees, and 18 species of lower trees. Therefore, volume and visual diversity in Seoul metropolitan area was provided by the height and bulk of trees, but the volume of scenery and diversity in the 5 metropolitan cities was insufficient. In the case of Seoul metropolitan area, using indoor garden spaces is necessary to connect with mini libraries, resting spaces, and snack bars, and various using types are necessary. In the case of the 5 metropolitan cities, only the visual image was provided, and therefore an activation plan for using spaces is necessary.