本研究的主要目的是评估在线活体叶绿素测定与在线pH和溶解氧（DO）浓度测量在检测天然水体中藻类存在方面的效用。具体目标是:确定活体荧光（IVF）在线监测叶绿素a的适用性；确定在线叶绿素a、pH和溶解氧（DO）测量在检测天然水体中藻类存在方面的效用；并且，将叶绿素a数据与藻类细胞计数和生物体积数据相关联。对北卡罗来纳州高点市饮用水处理厂的水源水进行了监测。 从大坝附近的取水构筑物处0.5 m深处抽取了来自城市湖的水。备用水源橡树洞湖的水也从取水构筑物的0.5 m深处抽出。在在线实验期间，城市湖泊被充气，以维持破坏性，并控制有害的藻类水华。包括11个参考文献、表格、图表。

The principal objective of this study was to evaluate the utility of on-line in-vivo chlorophyll determinations in conjunction with on-line pH and dissolved oxygen (DO) concentration measurements for detecting the presence of algae in natural waters. Specific objectives were to: determine the suitability of in-vivo fluorescence (IVF) for on-line monitoring of chlorophyll a; determine the utility of on-line chlorophyll a, pH, and dissolved oxygen (DO) measurements for detecting the presence of algae in natural waters; and, correlate chlorophyll a data with algal cell count and biovolume data. Source waters for the City of High Point, NC, drinking water treatment plant were monitored. Water from City Lake was withdrawn from a depth of 0.5 m at the intake structure near the dam. Water from Oak Hollow Lake, the back-up water source, was also withdrawn from a 0.5 m depth at the intake structure. City Lake was being aerated during the on-line experiments to maintain destratification and to control harmful algae blooms. Includes 11 references, tables, figures.