Fig. 5: Correlation analysis between daily per capita gross leakage load (PLgross) and driving factors across cities of varying population sizes. | npj Clean Water

Fig. 5: Correlation analysis between daily per capita gross leakage load (PLgross) and driving factors across cities of varying population sizes.

From: Sewage leakage challenges urban wastewater management as evidenced by the Yangtze River basin of China

Fig. 5

Population and economic concentration is represented by R10%, the ratio of the nighttime light intensity (NTL) (nanoW cm−2 sr−1) in the top 10% brightest urban areas to the total NTL of the city. *p < 0.05, **p < 0.01, ***p < 0.001.

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