http://reply.papertrans.cn/4/306/30557/30557-31.png
http://reply.papertrans.cn/4/306/30557/30557-32.png
http://reply.papertrans.cn/4/306/30557/30557-33.png
Submitted on: 04 February 2002.
Revised on: 14 February 2002.
Accepted on: 11 March 2002.
WATER ENVIRONMENT RESEARCH---WILEY
http://reply.papertrans.cn/4/306/30557/30557-35.png
Submitted on: 22 January 2000.
Revised on: 01 March 2000.
Accepted on: 27 March 2000.
WATER ENVIRONMENT RESEARCH---WILEY