The correlation between water bloom and natural conditions such as temperature and light in typical lake and reservoir A in Dalian is analyzed,which provides a basis for government ecological control planning of water bloom.Based on the data of Sentinel-2 satellite,the normalized vegetation index(NDVI)was obtained through ENVI software to determine the proportion of typical lake and reservoir water bloom area.A grey corre-lation model was constructed for correlation analysis with temperature and light conditions.The proportion of wa-ter bloom area in typical lake and reservoir A in Dalian city is strongly correlated with light conditions,and mod-erately correlated with temperature conditions.The correlation order is as follows:Average daily UV radiation in-tensity(0.68)＞hourly UV radiation intensity(0.66)=sunshine duration(0.66)＞average temperature(0.54)＞daily maximum temperature(0.53)＞hourly temperature(0.45).Therefore,the prevention and control of water bloom in lake and reservoir in Dalian should pay more attention to the autumn with good light conditions and pre-vent the outbreak of water bloom in an all-round way.
water bloomtemperature conditionslight conditionsgrey correlation
NETL
NSTL
维普
万方数据
