本powerpoint演示文稿首先简要介绍科布县-玛丽埃塔水务局和威克夫水处理厂。本文介绍了2006年干旱的统计数据，以及1993年一次藻华事件的历史展望；2007年1月另一次水华事件的警告信号；由于之前（1993年）的经验 在选择聚合物和 实施治疗变化；成本；还有经验教训。包括数字。

This powerpoint presentation begins by presenting a brief overview of the Cobb County - Marietta Water Authority and the Wyckoff Water Treatment Plant. Statistics on the drought of 2006 are presented, along with a historical perspective of an algal bloom event in 1993; warning signs of another algal bloom event in January 2007; because of earlier (1993) experience, able to react faster in selecting polymer and implementing treatment changes; costs; and, lessons learned. Includes figures.