Multivariable analysis of socio-economic factors to drive the land-use changes in the area of Manwan Dam Responses of phytoplankton community to the construction of small hydropower stations in Hainan Province THE CAUSE FOR THE PLUGGING OF WATER PIPE AT A HYDROPOWER STATION Quantitative classification and ordination of Jinping hydropower station, Sichuan Province,China Impact of cascade hydropower stations on suspended particulate matter in Xiangxi River