A Study on the Changes of Green Coverage in Detached Housing Area Developed after the World War II in Osaka-Kobe Urban Area

Abstract

This study aimed to analyze the changes of green coverage in the gardens of detached houses by interpretation of aerial photographs. The results are as follows; 1) A correlation between ratio of green coverage and lot area is more significant in backyard than front yard. 2) Minimum of the ratio in all target lots depends on lot area. It's about 10% at 200m² lot, about 15% at 280m² lot, about 20% at 330m² lot. 3) In the lot where the houses haven't been renewed, the ratio grows in 15-25years after development of the area. But in 25-35years after that, the ratio start to drop down at 20% at 200m² lot, 30% at 330m² lot. 4) In the lot where the houses have been renewed, the ratio after the renewal depends on lot area. It's 6-9% at 200m² lot, 9-20% at 280m² lot, 15-19% at 330m² lot.