Fig. 5: Correlations of effluent dissolved carbon (DC) flux with social economic factors.
From: Domestic wastewater is an overlooked source and quantity in global river dissolved carbon
a Relationships between effluent DC flux and key influencing factors. b Relationships between the proportion of effluent DC in basin river DC exports and key influencing factors. The red arrows indicate positive correlations, while the green arrows indicate negative correlations. The values at the arrow tips represent the corresponding Pearson correlation coefficients (*p < 0.05, **p < 0.01). P Precipitation, DA Drainage area, ABR Annual basin runoff, T-air Air temperature, PD Population density, GDP-pc GDP per capita, GDP Total GDP, GDP share GDP in percentage of country, Pop-city City population, BUA Built-up area.
