[Distribution Characteristics of Water Temperature and Water Quality of Fuxian Lake During Thermal Stratification Period in Summer].

. As an oligotrophic lake, the DO became lower and lower at the lakebed of Fuxian Lake, which indicated that it possibly faced ecological risks. Due to the separation of thermocline, the nutritive salt accumulative effect appeared in the hypolimnion. Chlorophyll a and permanganate index had a corresponding response relation with the water temperature stratification and showed the max value at the upper layer of the lake. ③During the thermal stratification period, the water temperature stratification of Fuxian Lake had a change during daytime. The increased thermal radiation in the noon caused the thermocline to dive, the strength to increase and the depth to narrow, which significantly influenced the dynamic distribution of pH, DO, conductivity and chlorophyll a of the epilimnion and the thermocline. The change rule of TP, TN and permanganate index during the daytime was not significant.