Riverine nitrate source apportionment using dual stable isotopes in a drinking water source watershed of southeast China

It is crucial to quantitatively track riverine nitrate (NO3-) sources and transformations in drinking water source watersheds for preventing current and future NO3- pollution, and ensuring a safe drinking water supply. This study identified the significant contributors to riverine NO3- in Zhaoshandu reservoir watershed of Zhejiang province, southeast China. To achieve this goal, we used hydrochemistry parameters and stable isotopes of NO3-...