Abstract: Hanjiang district in Yangzhou City was divided into a series of ecological units (500 m×500 m), and then the ecological conservation of each unit was evaluated through multifactor comprehensive analysis method based on five ecological elements including drainage component index, water conservancy facilities index, water quality target index, index of farmland ratio, and ecological red line control index. Four ecological constraint levels (highest, high, general, and low) were used to indicate ecological conservation, and their area occupying ratios were 7.36%, 25.76%, 43.22% and 23.66%, respectively. The study area was classified into four subfunction zones including potential development zone, reserved zone, transition zone, and protection zone, and they accounted for 10.33%, 40.66%, 36.04% and 12.97%, respectively. The evaluation results of ecological conservation of Hanjiang lakeside district in Yangzhou City is of great significance for promoting a balance between its ecological protection and economic development.

Key words: municipal sludge, water environment, coal gangue slope, vegetation restoration, growth media, harmful substance.