Contamination Assessment and Temporal Evolution of Nitrates in the Shallow Aquifer of the Metauro River Plain (Adriatic Sea, Italy) after Remediation Actions.

In fact, they generally show higher nitrate contents at lower TDS values, roughly resembling a negative trend ( Figure 5 a).

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Similarly, the industrial-central area wells display heterogeneous responses: #19 shows a stationary pattern, #17 and #20 a decreasing trend (slope Theil-Sen around −0.2) and #18 a relevant decrement (slope Theil-Sen = −0.83).

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