Er sea is Dali person " parents of back and belly "
The first time to Dali, walk in ave lane, "We want to protect maternal lake like protecting an eye -- Er sea " banner catchphrase everywhere is visible.
Er sea is in the position in Dali popular feeling is significant, have two reasons: One of, er sea is one of lakes of 7 big fresh water, it is inland highland laky, circumference 251 square kilometer, have about 3 billion stere water, most in amount to 21 meters. Came 100000, dali person drinking water relies on it, fish rely on it, irrigate rely on it, move section climate to rely on it, breed rely on it, generate electricity rely on it, shipping relies on it, development travel relies on it, er sea already became Dali person " parents of back and belly " . Secondly, because human activity is frequent, arrive on century 90 time metaphase, er sea water quality already was polluted badly, still had happened later " incident of blue green alga " . The value that people realizes protective Er sea from now on -- the home that protective Er sea protects him Lai Yisheng to put namely.
Er sea water quality basically is had by pollution two big reasons: It is an area wide, the mouth that enter water is much. According to statistic, the size river that flows into Er sea has 117. The hotel that is built in region of Er ocean current, mountain villa has 127, year sewage discharges about 258 thousand tons. Their great majority was not treated corrupt measure, direct or emiting into Er seawater secondhand is. In addition, the useless water treatment of company of a few measurement, hospital did not amount to mark or emit into region of Er ocean current directly. 2 it is consciousness of dweller lack environmental protection. The 620 thousand population that lives in Er sea periphery is a farmer for the most part, some breeds with fishing make a living, some relying on that depasture cultivate land solves dress warmly and ear one's fill. Agriculture of environmental protection, zoology, scientific farm... some earlier year a blank is almost in their memory.
Carry out 6 big projects to return one pool clear water
Face so complex pollution source and crowd structure, after Dali investigation and study, investment carries out project of 6 big integrated processing 1.5 billion yuan to return Er Hai Yichi to rinse:
-- rehabilitate of Er sea zoology and construction project. The organization carried out annulus sea 128 kilometers lakeside takes zoology to restore to build, put fry of large-scale filter feeding habits on fingerling to Er sea, begin water hyacinth and harmful aquatic to salvage, undertake water plant restores to set an example sinking, in order to control Er of great capacity eutrophication speed.
-- sewage disposal and cut corrupt project. The organization was carried out be as long as Gu Cheng of the net of integrated canal of Er sea south bank of 200 kilometers, Dali reachs next closing cut corrupt sewage treatment plant of county of source of dry canal, Er and city offer drainpipe net to wait for construction project, close to stop and turn 71 have contaminative company.
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