生态学杂志2018，Vol.37Issue(3)：743-750,8.DOI:10.13292/j.1000-4890.201803.023
天津海河氮动态变化对夏季强降雨的响应过程
Response of nitrogen dynamic change to heavy rainfall events during summer in Haihe River of Tianjin City
摘要
Abstract
Climate change is an important factor affecting material transport in the basin.Annual rainfall has increased significantly in recently years in the North China.The environmental impact of material transport should be considered during the construction of sponge city.In this study,river water samples in four important sections of the Haihe River and samples from city road runoff were collected during rainy season to explore the effects of heavy rainfall events on the dynamics of nitrogen pollution in Haihe River in Tianjin.The rainfall data were taken from the relevant hydrological stations.The results showed that NO3--N concentrations of all the studied sections sharply increased after the heavy rainfall events and recovered to pre-rainfall levels after one week.However,δ15N-NO3-and δ18O-NO3-first decreased and then increased.Integrated analysis suggested that mixing effects,biogeochemical processes and different responses to rainfall affected the dynamics of nitrogen pollution of the Haihe River in Tianjin.The substantial increases of nitrogen load during the rainfall period indicated that the factitious pollution during rain events was very serious,which led to elevated nitrogen pollution in urban rivers.In summary,the material transportation in urban fiver during the rainfall period did not follow the dilution effect.Controlling of urban point source pollution should be given priority in the management of urban water environment quality.关键词
城市河流/氮氧同位素/硝酸盐/降雨Key words
urban river/nitrogen and oxygen isotope/nitrate/rainfall.引用本文复制引用
夏妍梦,李彩,李思亮,狄崇利,岳甫均,彭慧..天津海河氮动态变化对夏季强降雨的响应过程[J].生态学杂志,2018,37(3):743-750,8.基金项目
国家自然科学基金优秀青年基金项目(41422303)资助. （41422303）
