摘要
为了解污染源对水库富营养化的影响,于2000年的枯水期(6～7月)与丰水期(11～12月)对三座污染类型的水库:石岩水库、大镜山水库、大水桥水库进行采样,测定和分析水库的营养盐及浮游生物。根据相关加权的综合营养状态指数评估,石岩水库为富营养型水库,大镜山水库与大水桥水库为中-富营养型水库。这三座水库污染源不同,其富营养特征差异较为明显,特别是营养水平的季节动态不同。石岩水库的主要污染源为城镇生活污水,其主要富营养特点为:各种营养盐浓度、浮游生物丰度及COD值在三个水库中最高,有机污染严重;丰枯两期均有种类较多、丰度较高的耐污藻类——裸藻(Euglena Ehr.);枯水期富营养水平明显高于丰水期。大水桥水库主要受农业活动污染,其主要富营养特点为:受地表径流影响显著,PO_4-P和TP浓度以及浮游生物丰度丰枯两期差异比较明显,均为丰水期高于枯水期;丰水期浮游植物主要以蓝藻为主,枯水期则以硅藻为主。大镜山水库污染来源主要为其调水河流前山河,受工业污水污染比较严重,生活废水的污染也较为突出,其主要富营养特点为:总磷浓度及浮游动物丰度枯丰两期差异较为明显,受河流调水控制。
To study the impact of pollution sources on the eutrophication characteristic of reservoirs, three reservoirs (Shiyan, Dajingshan and Dashuiqiao) were sampled to measure the nutrients and planktons in 2000. The trophic state index of the three reservoirs indicated that the Shiyan reservoir is eutrophic, Dajingshan reservoir and Dashuiqiao reservoir are meso-eutrophic. The eutrophication of the three reservoirs was characterized with the pollution sources, especially, the reservoirs have different dynamics of trophic levels. Shiyan reservoir was principally polluted by municipal sewage. The nitrogen and phosphorous concentrations and plankton abundance in Shiyan reservoir are the highest of the reservoirs, and highly abundant Euglena Ehr. was observered in both flood season and dry season. Shiyan reservoir is heavily loaded with organic pollution. Dashuiqiao reservoir is mostly polluted through agricultural activity, the concentrations of PO4-P and TP in the flood season is much higher than in the dry season. The Cyanophyta's abundance is dominant in the flood season and the Bacillariophyta in the dry season. Dajingshan reservoir was polluted by industrial sewage mainly. In this reservoir there were distinct seasonal variations in TP concentration and zooplankton abundance, and the variations were controlled by pumping water from a river.
出处
《生态科学》
CSCD
2002年第4期333-337,共5页
Ecological Science
基金
教育部基金(71020)
广东省科技攻关项目(2KM06103S)
教育部优秀教师资助计划基金
关键词
水库
营养盐
浮游生物
富营养化
Reservoir, Nutrients, Plankton, Eutrophication
