Nitrate sources and transformations in a river-reservoir system: Response to extreme flooding and various land use.

ABSTRACT: Nitrate NO3- pollution poses a global aquatic threat, promoting eutrophication and endangering human health. Large floods can swiftly drive significant nitrogen load into rivers and downstream water bodies, nevertheless, precisely quantifying NO3- sources in watersheds with complex land use patterns remains challenging. In June 2020, heavy and persistent rainfall triggered severe floods across southeastern China, causing Lake Qiandao, the largest reservoir in this region, to reach its highest recorded level. This study investigated NO3- sources and transformations within the Xin'an River-Lake Qiandao system, particularly focusing on the impact of the catastrophic summer flooding event. Through extensive sampling, we identified a distinct nitrogen concentration gradient: from the pristine X

SUBMITTER: Zhao X 

PROVIDER: S-EPMC12657011 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature