Table 4. Total area and ratio comparison before and after park renewal design

Park name	Category		Before renewal		After renewal
			Area(m2)	Ratio(%)	Area(m2)	Ratio(%)
Seonrin Children’s Park	Entropy reduction	Natural ground greenery	289	18.3	640	40.6
		Facility	1,287	81.7	935	59.4
		Total	1,575	100.0	1,575	100.0
	Water cycle	Natural ground greenery	265	18.3	640	40.6
		Permeable paverment area	-	-	656	41.6
		Gap permeable paverment area	358	22.8	125	8.0
		Impervious paverment area	757	48.1	-	-
		Facility area	195	10.8	154	9.8
		Total	1,575	100.0	1,575	100.0
	Biodiversity	Multi-layer structure	-	-	75	4.8
		Duplex-layer structure	262	16.6	148	9.4
		Single-layer structure	312	19.8	-	-
		Food planting area(multi-layer structure)	-	-	260	16.5
		Large tree planting area(duplex-layer structure)	-	-	157	10.0
	Ecological area ratio		336.6	21.4	1,041.9	66.2
Dangmal Children’s Park	Entropy reduction	Natural ground greenery	35	1.5	35	1.5
		Artificial ground greenery	952	39.5	1,224	50.7
		Facility	1,422	59	1,149	47.8
		Total	2,409	100.0	2,409	100.0
	Water cycle	Natural ground greenery	35	1.5	35	1.5
		Artificial ground greenery	952	39.5	1,224	50.7
		Permeable paverment area	-	-	910	37.9
		Gap permeable paverment area	-	-	43	1.8
		Impervious paverment area	1,178	48.9	-	-
		Facility area	243	10.1	197	8.2
		Total	2,409	100.0	2,409	100.0
	Biodiversity	Multi-layer structure	-	-	529	22.0
		Duplex-layer structure	343	14.2	340	14.0
		Single-layer structure	644	26.7	-	-
		Food planting area(multi-layer structure)	-	-	242	10.0
		Large tree planting area(duplex-layer structure)	-	-	149	6.2
	Ecological area ratio		701.4	29.1	1,192.5	49.5
Saemmul Children’s Park	Entropy reduction	Natural ground greenery	450	45.3	485	48.9
		Facility	542	54.7	507	51.1
		Total	992	100.0	992	100.0
	Water cycle	Natural ground greenery	450	45.3	485	48.9
		Permeable paverment area	-	-	425	42.8
		Gap permeable paverment area	201	20.2	82	8.3
		Impervious paverment area	341	34.5	-	-
		Total	992	100.0	992	100.0
	Biodiversity	Multi-layer structure	-	-	124	12.5
		Duplex-layer structure	371	37.3	124	12.5
		Single-layer structure	79	8.0	-	-
		Food planting area(multi-layer structure)	-	-	88	8.9
		Large tree planting area(duplex-layer structure)	-	-	149	15.1
	Ecological area ratio		490.2	49.4	696.0	70.2