Ecological Indicators 122 (2021) 107218
3
Liou Index, the Malaysian Index and the Almeida Index have also been
developed.
To date, more than 35 WQI models have been introduced by various
countries and/or agencies to evaluate surface water quality around the
world (
Abbasi and Abbasi, 2012; Dadolahi-Sohrab et al., 2012; Kannel
et al., 2007; Stoner, 1978
). As shown in
Fig. 3
, WQI models have been
used in most parts of the world.
Table 1
shows that, although WQI
models have been applied to all major types of waterbodies, 82% of
applications have been to assess river water quality. Additionally, the
table shows that the CCME and NSF models have been used 50% of the
reviewed studies.
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