혼합적 토지이용이 주·야간 생활인구에 미치는 영향 : 서울시 상권을 중심으로 (Impacts of Mixed Land Use on De Facto Population by Day and Night: Focusing on Commercial Districts in Seoul)

Some commercial districts attract most of their visitors only during day-time, while others at night-time. This difference in time of population flow may be affected by land use such as mixed-use. This paper aims to analyze the different impacts of mixed land-use on population flow between the diurnal and the nocturnal districts. On an hourly basis, the standardized value of population in each census tally-districts forms distinct patterns in the 24-hour range. Based on a k-means clustering with an hourly location-based population data-set collected from smartphone signal in Seoul, we classify census tally-districts in commercial areas into two groups: Diurnal and nocturnal. We introduce a binominal logistic model where a binary indicator is used as the dependent variable for the two groups. A comparison of land-use patterns between the two groups shows some significant differences as follows: First, the nocturnal areas tend to have distinctive features consisting of vibrant streets due to a higher degree of mixed use. In those areas, the degree of mixed-use is found to be higher. Next, the residential use has a higher impact on the increase of floating population than other uses. These results imply that a proper degree of mixed use attracts more people to commercial districts even at night, thereby enhancing the vitality of the streets