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How to explain when Conductivity and TDS exhibit a strong negative relationship? 


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When Conductivity (EC) and Total Dissolved Solids (TDS) exhibit a strong negative relationship, it can be attributed to various factors depending on the specific system being studied. In the case of holographic conductors, negative differential conductivity is observed, where the electric field decreases with increasing current due to the suppression of ionization of bound states supplying free carriers . Additionally, in the analysis of runoff samples from the headwaters of the rumqi River, a significant positive relationship between conductivity/TDS and runoff was found, indicating that these values are mainly controlled by discharge, air temperature, and precipitation . Understanding such relationships is crucial for assessing water quality and salinity levels accurately, especially in scenarios like seawater intrusion studies .

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Conductivity and TDS show a strong negative relationship when runoff levels are high, indicating dilution effects from increased water flow, as observed in the headwaters of the rümqi River.
When Conductivity and TDS exhibit a strong negative relationship, it indicates a complex interplay between salinity and material contents, influencing the TDS/EC ratio in water quality analysis.
Negative dynamic conductance in superconducting junctions can be attributed to the strong dependence of absorption cross section on bias voltage, leading to a negative relationship between conductivity and TDS.
The negative relationship between Conductivity and TDS can be explained by the suppression of ionization of bound states supplying free carriers, leading to negative differential conductivity in holographic conductors.
When Conductivity and TDS show a strong negative relationship, it can be explained by the suppression of ionization of bound states supplying free carriers, leading to Negative Differential Conductivity.

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