基于天地协同的巢湖水华分布特征分析

基于MODIS影像监测2016年巢湖蓝藻水华分布，结果表明：水华的频次，持续时间从西北部水域向东南部水域逐渐减弱；西半湖湖心水华开始日期最早（5月19日），持续时间最长为131d，塘西水华发生频次较多（10次）.进一步将水华遥感监测结果与同步水面实测水质参数数据（藻密度，叶绿素a，总氮，总磷）进行相关性分析，利用Q型聚类分析将水面实测采样点分为东区和西区两部分.西区藻密度，叶绿素a，总氮，总磷和水华面积相关性较强（R²均大于0.6）.

Distribution characteristics analysis of algal bloom in Chaohu Lake based on the sky~earth collaborative method

Based on the MODIS (Moderate Resolution Imaging Spectroradiometer) series images, the distribution characteristics of algal bloom in Chaohu Lake in 2016 was analyzed. The results showed that the frequency and the duration of algal blooms gradually weakened from the northwest to the southeastern. The algal blooms of western parts of lake occurred in the earliest date (5.19) and had the longest duration (131d). The algal blooms of Tangxi area of Chaohu Lake occurred more frequently. Furthermore, the correlation between the algal bloom by remote sensing with the simultaneous monitoring data (algal density, chlorophyll A, total nitrogen, and total phosphorus) were analyzed. The Q cluster analysis method was employed to separate the measured sampling points in two areas:eastern and western of Chaohu Lake. There was a strong correlation between the algal density, chlorophyll A, total nitrogen, and total phosphorus with algal bloom area in western Chaohu Lake.