Ecological health analysis of drainage basin with PSR model and satellite images

Lots of hydrological and substance exchange indicate that environmental management from watershed perspective is very important to improve the ability of self-regulation of ecological system and ecological health in watershed scale. This paper takes Huntai river watershed as study region to assess the ecological health with remote sensing and Pressure-State-Response (PSR) model. Firstly, county is taken as the assessment unit in spatial scale, the assessment indexes are established according to the ecological feature of this watershed, and extracted from satellite images. Secondly, indexes are normalized and weighted by the Principal Component Analysis (PCA), then ecological health is analyzed.