Correlation Analysis of Typical Lake and Reservoir Water Blooms With Temperature and Light Conditions in Dalian
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
万方数据
维普
