A-60 
Ver Hoef JM, Peterson, E, and Theobald, D, 2007, Spatial Statistical Models that Use Flow 
and Stream Distance, Environmental and Ecological Statistics (in press). 
Wahba, G. 1990. Spline Models for Observational Data. Philadelphia (PA): Society for 
Industrial and Applied Mathematics. 169 p. 
Wang XJ, Liu RM. 2005. Spatial analysis and eutrophication assessment for chlorophyll a in 
Taihu Lake. Environmental Monitoring and Assessment 101:167-174. 
Zimmerman D., Pavlik C, Ruggles A, Armstrong MP. 1999. An experimental comparison of 
ordinary and universal kriging and inverse distance weighting. Mathematical Geol. 31:375- 
390. 
appendix a 
The Cumulative Frequency Diagram Method for Determining Water Quality Attainment 
