Algae
cover the lake surface
We
visited city lake close to our former
university
several times a year. In recent visit, we found:
-
Algae covers almost entire lake surface
-
Weed seems
decrease in number compared to previous visit.
In
case of algae, it is said the algae is include in blue green algae
species which contain dangerous poison called “microcystin.”
Blooming
of Blue green algae due to several factors:
-
excessive nutrient inflow to the lake
-
temperature increase due to season
-
shallowness of lake makes
water warm easily.
Uncontrolled
blooming has impacted on environment in general, at least to lower
the aesthetic
values of the lake.
Blue
green algae produces poison
Abundance
of weed and algae not only affect on aesthetic value, but also have
direct effect on:
-
fish population due to present of dangerous poison, microcystin.
-
swimming movement of people
-
boating recreations
-
other types of visitors and recreational activities.
Government
and local communities have planning to clean up the lake as soon as
possible. Project cost is estimated about US$ 50 million.
Hope,
the lake back to its previous, natural condition sooner than later!
