Impervious Surface Expansion: A Key Indicator for Environment and Urban Agglomeration—A Case Study of Guangdong-Hong Kong-Macao Greater Bay Area by Using Landsat Data

Table 3

The growth rate and speed of IS in the Pearl River Delta and two special administration regions (Hong Kong and Macao) from 1987 to 2017.

Period	Pearl River Delta		Hong Kong and Macao
	Growth rate (%)	Speed (km^2/a)	Growth rate (%)	Speed (km^2/a)
1987-1992	14.64	255.17	6.61	6.34
1992-1997	4.97	150.16	2.03	2.59
1997-2002	6.29	237.23	3.07	4.32
2002-2007	7.86	389.60	4.07	6.61
2007-2012	8.93	616.56	2.87	5.60
2012-2017	4.27	426.73	3.68	8.21