摘要
通过野外监测和室内分析,获取了楚雄州境内28座水库水体的水温、pH值、溶解氧、浊度、电导率、叶绿素a浓度、藻蓝蛋白浓度、氢氧稳定同位素(δD、δ18 O)等参数。梳理了水环境特征及变化,利用相关分析探讨了各参数之间的相互关系。结果表明:浅水湖库的水温与太阳辐射同步变化,水体的pH值为7~9.3,呈弱碱性至碱性,水体溶解氧浓度为5.5~10.5 mg/L,三个水质参数随深度增加而递减。受风力扰动的影响,水体浊度较高且随深度呈递增趋势。电导率与溶解性固体总量相对较低,两者在垂向上的变化趋势具有一致性。大部分水库水中叶绿素a浓度在10μg/L以内,藻蓝蛋白浓度在5000 cells/mL以内,垂向变化特征一致,表征了蓝藻为水体中的优势藻群。稳定同位素指示了区域性的降水为水库水源补给的主要形式。部分水库的水温与叶绿素a、pH,以及藻蓝蛋白与溶解氧、pH之间呈显著的正相关关系。
Through field monitoring and laboratory analysis,water temperature,pH,dissolved oxygen,turbidity,conductivity,chlorophyll-a,phycocyanin,and the stable isotopes of hydrogen oxygen(δD,δ18 O)of 28 reservoirs in Chuxiong area are obtained.Based on the analysis of water environment characteristics and its change,the correlation between the water parameters was discussed through correlation analysis.The results showed that the change of water temperature was following the solar radiation.The pH value of the water body was 7-9.3,which is weakly alkaline to alkaline.The dissolved oxygen is 5.5-10.5mg/L,water temperature,pH,and dissolved oxygen decreased with the increasing of water depth.Affected by wind disturbances,the turbidity was high and increased from surface to bottom of water.The characteristic and change of conductivity were smaller with the total dissolved solids.The concentration of chlorophyll a in most reservoir waters was within 10μg/L,and the concentration of phycocyanin was less than 5000 cells/ml.As the main kind of algae species in these reservoirs,the vertical change of cyanobacteria are consistent with the chlorophyll a.Stable isotopes showed that regional precipitation was the main source of reservoir water supply.In some reservoirs,there was a significant positive correlation between the water temperature,chlorophyll a and pH,as well as phycocyanin and dissolved oxygen and pH.
作者
段立曾
DUAN Li-ceng(School of Ecology and Environmental Science,Research Institute of Plateau Lakes Ecology and Treatment,Yunnan University,Kunming Yunnan 650500,China)
出处
《环境科学导刊》
2021年第1期41-50,共10页
Environmental Science Survey
基金
云南省应用基础研究青年项目(2017FD074)
云南省科技领军人才培养计划资助项目(2015HA024)。
关键词
水质参数
特征及变化
水库水体
楚雄
water quality parameters
characteristics and change
reservoir
Chuxiong area
