Sources of Nitrogen Pollution in Upstream of Fenhe River Reservoir Based on the Nitrogen and Oxygen Stable Isotope

Figure 1

Locations of the sampling sites in study area. S1: Leiming Temple; S2: the entrance to Yellow River water diversion junction of Toumaying village; S3: the outlet of Yellow River water diversion junction of Toumaying village; S4: the junction of Honghe River; S5: Mingshuihe River; S6: Jingle county; S7: Dongnianhe River; S8: Hecha village; S9: Quli county; S10: the inlet of Fenhe Reservoir; S11: the middle part of Fenhe Reservoir; S12: the outlet of Fenhe Reservoir; S13: Jianhe River Bridge.