摘要
为研究河流型水库氮磷等营养元素成分及变化规律,对湖北恩施大龙潭水库水环境因子进行了一整年的调查,分别调查了水库10个典型位置氨氮(NH_(4)^(+)-N)、亚硝酸盐氮(NO_(2)^(-)N)、硝酸盐氮(NO_(3)^(-)-N)、总氮(TN)、总磷(TP)、磷酸盐(PO_(4)^(3-))的含量,采用空间插值法对水库水质各项指标进行数据处理和方差分析,并分析了水库水质的时空变化特征。结果表明,水库中的硝酸氮、亚硝酸氮、总氮、总磷和正磷酸盐含量在空间分布上呈现干流高于支流,氨氮含量表现为支流高于干流,亚硝酸盐氮含量表现为下游高于上、中游,正磷酸盐含量表现为上游高于下游。时间分布上总氮含量表现为冬季比夏季高,氨氮含量呈现出“汛前升高、汛后降低”的变化,总磷含量夏季高于冬季。水库氮磷比的范围在20∶1~40∶1之间,磷是水库藻类增殖的主要限制因子。研究成果对水库水体富营养化控制、保障区域饮用水安全具有重要意义。
In order to study the nutrient elements and their changes in river reservoirs,the water environmental factors of Dalongtan Reservoir in Enshi,Hubei Province were investigated for a whole year.The contents of ammonia nitrogen(NH_(4)^(+)-N),nitrite nitrogen(NO_(2)^(-)-N),nitrate nitrogen(NO_(3)^(-)-N),total nitrogen(TN),total phosphorus(TP)and phosphate(PO_(4)^(3-)-)in 10 typical locations of the reservoir were investigated respectively.The spatial interpolation method was used to conduct data processing and variance analysis for each index of water quality in the reservoir.The temporal and spatial variation characteristics of reservoir water quality were analyzed.The results show that nitrogen nitrate,nitrite,total nitrogen,total phosphorus and orthophosphate in the reservoir were higher in the main stream than in the tributaries;Ammonia nitrogen was higher in the tributaries than in the main stream;Nitrite nitrogen was higher in the lower stream than in the upper and middle stream;Orthophosphate was higher in the upper stream than in the lower stream;The ammonia nitrogen content showed a change of"increasing before flood and decreasing after flood".The total phosphorus content was higher in summer than in winter.The ratio of N to P in the reservoir ranges from 20∶1 to 40∶1,and P is the main limiting factor of algae proliferation.The research results are of great significance for controlling eutrophication of reservoir water and ensuring regional drinking water safety It is of great significance to study the pollution load and distribution characteristics of nitrogen and phosphorus in reservoir for eutrophication control and drinking water safety.
作者
王依晴
黄向阳
何鑫
党鹏宇
WANG Yi-qing;HUANG Xiang-yang;HE Xin;DANG Peng-yu(School of Urban Construction,Yangtze University,Jingzhou 434023,China)
出处
《水电能源科学》
北大核心
2024年第7期53-56,共4页
Water Resources and Power
基金
湖北省环保科研专项(2018HB01)。
关键词
大龙潭水库
氮磷营养盐
富营养化
时空分布
Dalongtan Reservoir
nitrogen and phosphorus nutrients
eutrophication
spatiotemporal variation
