Science Advances

Supplementary Materials

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  • Supplementary Text
  • Fig. S1. National-level changes in multiple driving factors of inland water quality in China during the period 2003–2015.
  • Fig. S2. Observed changes in water quality measures for five time series across 10 basins during the period 2003–2017.
  • Fig. S3. Interannual variability in percentages of five water quality levels limited by site-level records of water quality measures for 10 basins during the period 2003–2017.
  • Fig. S4. Changes in anthropogenic pollution discharges from different sectors across 10 basins during the period 2003–2017.
  • Fig. S5. Changes in the volume of environmental investment and the rate of access to sanitary toilets for rural residents across 10 basins during the period 2003–2015.
  • Fig. S6. The relationships between environmental investments and declining pollution emissions and changes in the discharge levels between 2003 and 2015 across 10 basins.
  • Table S1. Summary of the distinguishing characteristics of 10 basins delineated in this study.
  • Table S2. Summary of analysis results of trends in water quality indicators during the period 2003–2017 across China and 10 basins.
  • Table S3. Summary of analysis results of trends in the proportion of water quality levels I + II + III for water quality indicators for the period 2003–2017 across China and 10 basins.
  • Table S4. Coefficients of the first component derived from PCA of loading sources and used for the explained variances estimated by type II ANOVA in both the Qm and Qa time series of COD and NH4+-N concentrations from 2003–2017 across 10 basins.
  • Table S5. Summary of impact factors of local inland surface water quality across 10 basins.

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