The appearance of the water is just one aspect of a waterscape that can be appreciated
aesthetically. Water appearance is affected by water clarity and water
colour. Here, an aesthetic assessment model of waterscape was suggested. In
the model, water clarity and colour have direct effects, whereas water quality
and phytoplankton biomass have indirect effects, on tourists’ aesthetic assessment
of water bodies. The preferred water colour is aquamarine to blue,
regardless of depth of clarity. Water colour ranges from pastel yellow to yellow-green are not favoured by tourists. Four water-quality parameters were
correlated with water clarity and phytoplankton biomass. The coefficient of
indirect effect of river pollution index on tourists’ aesthetic valuation of aquamarine
to blue water colour was -0.457, and for pastel yellow to yellowgreen,
it was -0.209. The research results showed observation of water colour
could not only reflect waterscape aesthetic value, but also serve as a guide of
judging water quality, and the status of phytoplankton benefited to simplify
the process of water-quality management for waterscape.
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