Humans are often faced with difficult situations where freshwater resources are very limited and
on the other hand, there is an increasing need (Akhsan et al., 2011). For people who live in
coastal areas and small islands, freshwater is a very important source of water, while most of the
coastal areas are brackish water (Arieyanto et al., 2014). Not to mention if there is a long dry
season, clean water will be difficult to find. The source of brackish water is so abundant that
there are many undeveloped settlements in coastal areas. Several parties have attempted to
ISSN: 2278-4853 Vol 10, Issue 9, September, 2021 Impact Factor: SJIF 2021 = 7.699
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