Fig. 3
From: Assessing the water quality hazard and challenges to achieving the freshwater goal in Sri Lanka
Aggregated long-term (1992–2010) plots of surface water parameters across Sri Lanka. a monthly time series; and b seasonal variability in BOD (Biochemical Oxygen Demand), Total Phosphorous (TP), Dissolved Oxygen (DO), Electrical Conductivity or EC (µS/cm) and NOxN or Nitrates (NO3) and Nitrites (NO2). Gridded data source: World Bank2,3 c inter-annual variability in monthly rainfall in each year from 1992 to 2010 shown in Box and Whisker plots; and daveraged monthly climatology of rainfall in Sri Lanka. Rainfall time-series (1992 to 2010) data derive from global gridded dataset provided by the Climatic Research Unit (CRU), University of East Anglia (CRU v. TS4.05). Graphs are created in R programming language32.
