文档介绍：Relating Watershed Characteristics to Non-point
Source Pollution in Miyun Reservoir Watershed
Using ponents Analysis(PCA)
OU Yang, WANG Xiaoyan *,LI Mingtao
College of Resources, Environment & Tourism,
Capital Normal University,
Beijing, China
ouyayng@
Abstract-The watershed Landscape characteristics are important to describes the variability of in-stream water quality indicators
variables that influence surface water quality. Freshwater in relation to landscape pattern, position and
research and management efforts could be greatly enhanced by a hydrologic use using log-normal probability plotting and
better understanding the relationship between these variables eigenvalue-eigenvector analysis (2) to develop multiple
and surface water quality. The major focus of this paper involved regression equations based on PCA for estimating water quality
modeling relationships between watershed characteristics indicators (3) to discusses the importance of the landscape
variables and water quality indicators. The Miyun reservoir
watershed was the selected study site. Statistical analyses were pattern, position and hydrologic in relation to
performed to quantify the relationship between landscape the significant ponents and the predicted values.
metrics, hydrologic and surface water quality. PCA eliminated
cross-correlations between variates