石岩水库叶绿素a时空分布及其影响因子分析

发布时间：2018-11-23 16:24

【摘要】：2013年4月至2014年6月对典型调水供水型水库石岩水库蓝藻、绿藻和硅藻叶绿素a浓度[ρ(Chla)]及相环境因子进行监测,分析了ρ(Chla)时空分布特征,探讨了藻类与环境因子的相关关系.结果表明石岩水库ρ(TChla)为9.59~123.29μg·L~(-1),平均52.03μg·L~(-1),其中蓝藻ρ(Chla)为4.54~76.30μg·L~(-1),平均为28.39μg·L~(-1);硅藻ρ(Chla)为3.16~46.09μg·L~(-1),平均为15.02μg·L~(-1);绿藻ρ(Chla)为0.77~26.21μg·L~(-1),平均为8.62μg·L~(-1).2013年4~12月上旬以及2014年5~6月优势藻为蓝藻,其他时期硅藻占优势,绿藻全年处于较低水平.石岩水库ρ(Chla)空间异质性低,整体呈现由南向北逐渐降低的空间分布特征,汛期整个库区和高温无雨期南半库区存在蓝藻水华风险.径流污染是石岩水库藻类叶绿素a空间异质性的主要原因.相关分析和CCA分析显示:水温是3种藻类的首要影响因子,汛期径流量与蓝藻相关性极大.氮磷比与3种藻类负相关,磷是石岩水库藻类生长的限制性因子.蓝藻主要相关因子还包括TOC、TN、pH、透明度和硝酸盐氮,硅藻主要相关因子还包括硅酸盐、TOC、硝酸盐氮和COD,绿藻主要相关因子还包括TOC、COD、pH、透明度和硝酸盐氮.
[Abstract]:From April 2013 to June 2014, the concentrations of chlorophyll a [蟻 (Chla)] and phase environmental factors in typical reservoirs of water diversion and water supply were monitored, and the spatial and temporal distribution characteristics of 蟻 (Chla) were analyzed. The relationship between algae and environmental factors was discussed. The results show that the 蟻 (TChla) of Shiyan reservoir is 9.59 ~ 123.29 渭 g / L ~ (-1), with an average of 52.03 渭 g / L ~ (-1). The 蟻 (Chla) of cyanobacteria is 4.54 ~ 76.30 渭 g / L ~ (-1), with an average of 28.39 渭 g / L ~ (-1). The 蟻 (Chla) of diatom was 3.16 渭 g / L ~ (-1), with an average of 15.02 渭 g / L ~ (-1). The 蟻 (Chla) of Chlorophyta was 0.77 ~ 26.21 渭 g / L ~ (-1), with an average of 8.62 渭 g / L ~ (-1). The dominant algae were cyanobacteria in the first ten days of April-December 2013 and May ~ June of 2014, and the diatoms were dominant in other periods, and the green algae was at a low level in the whole year. The spatial heterogeneity of 蟻 (Chla) in Shiyan reservoir is low, and the spatial distribution of 蟻 (Chla) decreases gradually from south to north. The risk of cyanobacteria Shui Hua exists in the whole reservoir area during flood season and in the south half reservoir area of high temperature and no rain. Runoff pollution is the main reason for the spatial heterogeneity of algae chlorophyll a in Shiyan reservoir. Correlation analysis and CCA analysis showed that water temperature was the main factor affecting the three algae, and the runoff in flood season had a great correlation with cyanobacteria. The ratio of nitrogen to phosphorus was negatively correlated with the three species of algae, and phosphorus was the limiting factor for the growth of algae in Shiyan reservoir. The main correlation factors of cyanobacteria include TOC,TN,pH, transparency and nitrate nitrogen, diatoms also include silicate, TOC, nitrate nitrogen and COD, green algae main correlation factors also include TOC,COD,pH, transparency and nitrate nitrogen.
【作者单位】：哈尔滨工业大学深圳研究生院土木与环境工程学院;山东省胶东调水局;深圳职业技术学院建筑与环境工程学院;深圳市水质检测中心;清华大学深圳研究生院;深圳市国家气候观象台;
【基金】：水利部公益性行业科研专项(2013010470) 深科技创新项目基础研究(JCYJ20140508155916418)
【分类号】：Q948.8;X524

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