三峡库区回水区叶绿素a的分布及影响因素分析

发布时间：2018-10-19 16:28

【摘要】：为探讨三峡水库蓄水以来竺溪河-澎溪河回水区叶绿素a的分布及其影响因素,2013年1月1日至2014年12月,在竺溪河-澎溪河河段设置了8个采样点,对叶绿素a及相关环境因子进行了监测。依据监测信息和资料,对竺溪河-澎溪河河段富营养化状态、叶绿素a和相关环境因子的空间分布特性及其相关性进行了分析。结果表明:竺溪河和澎溪河均处于不同程度的富营养化状态,且受干流倒灌的影响,回水区首端的富营养化程度具有季节性变化特点;竺溪河和澎溪河回水区各采样点叶绿素a和TN,TP的相关性系数均值分别为澎溪河-0.014,-0.014,竺溪河为0.154,0.244,而干流为0.469,0.449。该结果也说明,TN和TP对支流回水区藻类生长的影响比较小,而与干流的叶绿素a浓度呈相对明显的相关关系。
[Abstract]:In order to study the distribution of chlorophyll a in the backwater area of Zhuxi River and Penghu River since the three Gorges Reservoir was impounded, from January 1, 2013 to December, 2014, eight sampling sites were set up in the reach of Zhuxi River and Penghu River. Chlorophyll a and related environmental factors were monitored. Based on the monitoring information and data, the eutrophication status, the spatial distribution characteristics of chlorophyll a and related environmental factors in the Zhuxi-Penghuxi River reach and their correlation were analyzed. The results show that both Zhuxi River and Penghuxi River are eutrophication in different degrees, and the eutrophication degree in the first end of the backwater area is seasonal. The correlation coefficients of chlorophyll a and TN,TP in the backwater areas of Zhuxi River and Penghuxi River were -0.014 ~ 0.014 ~ 0.014, 0.154 ~ 0.244 and 0.469 ~ 0.449 respectively. The results also showed that the effects of TN and TP on algae growth in tributaries were relatively small, but there was a relatively significant correlation with chlorophyll a concentration in the main stream.
【作者单位】：武汉大学资源与环境科学学院;重庆市环境监测中心;武汉大学水资源与水电科学国家重点实验室;
【基金】：国家“十二五”重大科技专项水专项项目(2013ZX07503-001)
【分类号】：X52

【相似文献】