TY - Journal of Yangtze River Scientific Research Institute A1 - CHEN Hao, JING Zheng, NI Zhi-wei, LUO Hui-ping, LUO Ping-an, LI Qing-yun T1 - Spatiotemporal Variation of Water Quality in the Main Canal of Middle Route of South-to-North Water Diversion Project Based on Principal Component and Cluster Analysis Y1 - 2022-07-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 36 EP - 44 VL - 39 IS - 7 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20210272 ER -