Table 1.

Sampling periods at the sampling sites.

Sampling Event	Suwon
	SW1	SW2		SW3	SW4		SW5	SW6		SW7	SW8		SW9	SW10		SW11		SW12	SW13		SW14		SW15	SW16		SW17	SW18		SW19
Date (Year: 2010)	2.03	2.24		3.18	3.31		4.07	4.23		5.07	5.14		5.28	6.11		6.28		7.12	7.26		8.16		9.06	9.27		10.13	11.01		11.19
	–	–		–	–		–	–		–	–		–	–		–		–	–		–		–	–		–	–		–
	2.24	3.18		3.31	4.07		4.23	5.07		5.14	5.28		6.11	6.28		7.12		7.26	8.16		9.06		9.27	10.13		11.01	11.19		12.08
Sampling Event	Ansan
	AS1		AS2			AS3			AS4			AS5			AS6		AS7			AS8		AS9			AS10			AS11
Date (Year: 2010)	2.24		3.18			3.31			4.16			4.30			5.14		5.28			6.11		6.28			7.12			7.26
	–		–			–			–			–			–		–			–		–			–			–
	3.18		3.31			4.16			4.30			5.14			5.28		6.11			6.28		7.12			7.26			8.16