夏季城市内河藻类暴发的原因解析及控制对策  

Causes of Algal Bloom in the Urban River In Summer and Its Control Strategy

作　　者：张雪 孙莹 岳佳妮 曹云霄 马千里 刘畅 ZHANG Xue;SUN Ying;YUE Jia-ni;CAO Yun-xiao;MA Qian-li;LIU Chang(Shenyang Academy of Environmental Sciences,Shenyang 110167,China;Huizhou Water Group Co.Ltd.,Huizhou 516000,China;South China Institute of Environmental Sciences,Guangzhou 510655,China)

机构地区：[1]沈阳环境科学研究院,辽宁沈阳110167 [2]惠州市水务集团有限公司,广东惠州516000 [3]生态环境部华南环境科学研究所,广东广州510655

出　　处：《中国给水排水》2023年第7期76-80,共5页China Water & Wastewater

基　　金：广东省重点领域研发计划项目(2019B110205004);辽宁省科学技术计划项目(2021JH4/10200006)。

摘　　要：青年河是惠州市主要饮用水源东江的支流,下游沿岸受城市化影响,水质出现恶化,经截污工程的实施,河道基本恢复了健康。然而,自2019年9月下旬起,下游部分河段持续多日出现中午大量藻类聚集的现象。针对这一问题,在藻类暴发期间,对污染河段开展了污染溯源及采样调查工作,以便为后续提出防治对策提供科学依据。结果表明,底泥污染是藻类暴发的主要原因,适宜的气象条件和水动力条件加剧了中午时段藻类向表层的迁移和聚集;同时藻细胞持续增殖,影响范围仍在扩大。为抑制藻类继续生长,建议对污染河段及时清淤,并结合补水和生态措施,增强水体流动性和活力,重点加强整个流域管理。Qingnian River is a tributary of Dongjiang River,and the main drinking water source of Huizhou.The water quality of downstream river deteriorated due to the influence of urbanization,and the river basically recovered its function after the implementation of the sewage interception project.However,the algae bloomed at noon in some parts of the downstream river for several days since late September 2019.To solve this problem,pollution tracing and sampling were carried out in the polluted section during the algae bloom,so as to provide scientific basis for the subsequent control measures.Sediment pollution was the main cause of algae bloom.Suitable meteorological and hydrodynamic conditions aggravated algae migration and accumulation to the surface during noon.The algal cells continued to proliferate,and the range of influence was still expanding.To control algal bloom,it is recommended to dredge the polluted river reaches in time and combine water replenishment and ecological measures to enhance water mobility and vitality,especially to strengthen the management of the whole basin.

关 键 词：青年河 藻类暴发 底泥污染 清淤补水 叶绿素A 

分 类 号：TU992[建筑科学—市政工程]