Abstract

Bayat J, Hashemi SH, Nikzad MF, Talakesh SMR. 2021. Necessity of water treatment to meet lake water quality goals in Chitgar Lake. Lake Reserv Manage. 37:160–169.

Managing urban lake water quality to prevent algae blooms is important for tourism at Chitgar Lake, which is a shallow artificial lake created for recreation in northwest Tehran City, Iran. Its water quality is influenced by the Kan River as its water source, as well as by peripheral activities and bird excrement. This study investigates the effectiveness of different water quality management practices including restricted water intake rules and water treatment from April 2013 to April 2020 to improve the water quality of the lake in order to limit algae blooms. The nonparametric Mann–Kendall method and the Sen function were applied to decipher trends and assess impacts of the practices. Despite intake water control, the trend analysis showed that chlorophyll-a and total phosphorus had increased after the opening of the lake in 2013. However, this incremental trend was greatly reduced after commissioning a treatment plant for improving water quality. The treatment system improves the quality of diverted Kan River water during winter lake refill and is used to treat lake water during the rest of the year. The specific characteristics of the lake and the Kan River prevent achievement of target water quality without water treatment.

摘要

Bayat J，Hashemi SH，Nikzad MF，Talakesh SMR。2021年，必须进行水处理才能达到Chitgar Lake湖水质的目标。湖后备管理。37：160–169。

管理城市湖泊水质以防止藻类大量繁殖对Chitgar Lake的旅游至关重要，而Chitgar Lake是在伊朗德黑兰市西北部为休闲而创建的浅人工湖。它的水质受到作为其水源的the河以及周边活动和鸟类排泄物的影响。本研究调查了2013年4月至2020年4月不同水质管理措施（包括受限制的取水规则和水处理）的有效性，以改善湖泊的水质以限制藻类繁殖。使用非参数Mann-Kendall方法和Sen函数来解释趋势并评估实践的影响。尽管控制了进水，但趋势分析显示叶绿素a在2013年湖泊开放之后，总磷增加了。但是，在调试处理厂以改善水质后，这种增加的趋势大大降低了。该处理系统可在冬季湖泊注水期间提高分流的坎河水的质量，并在一年中的其余时间用于处理湖泊水。湖泊和坎河的特定特征阻碍了未经水处理的目标水质的实现。