Optical water quality variables (Secchi disk depth and Forel-Ule colour index...
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Optical water quality variables were recorded using a black and white Secchi disk with a diameter of 40 cm and a Forel-Ule colour scale. The Secchi disk depth was recorded as a...
光学水质变量采用直径40cm的黑白赛氏盘（Secchi disk）与福勒-乌勒色标（Forel-Ule colour scale）进行记录，赛氏盘水深的记录结果为……
