Spatiotemporal Variation Characteristics of Water Pollution and the Cause of Pollution Formation in a Heavily Polluted River in the Upper Hai River

<div>Trend of the temporal variations of (a) COD<sub>Cr</sub> at site G2, (b) NH<sub>3</sub>–N at site G2, (c) COD<sub>Cr</sub> at site G4, and (d) NH<sub>3</sub>–N at site G4.</div>

Journal of Chemistry

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Figure 2

Figure 2: Spatiotemporal Variation Characteristics of Water Pollution and the Cause of Pollution Formation in a Heavily Polluted River in the Upper Hai River 

Figure 2 | Spatiotemporal Variation Characteristics of Water Pollution and the Cause of Pollution Formation in a Heavily Polluted River in the Upper Hai River 