The invention discloses an
ecosystem model and biomanipulation technology based
eutrophic water body remediation method. Firstly, an ECOPATH model is used to fit the energy flowing mode of the currentecosystem, when the
annual production of
phytoplankton or aquatic
macrophyte in a
water body is too high, the minimum
primary production requiring for maintaining the operation of the
system is takenas the baseline according to the output result of the model, the consumption of the extra
primary production in the
system is increased through the
predation action of fish by using a method of quantitatively adding a fish
consumer, and meanwhile, the top-down effect is produced to control the
biomass and the
community structure of a primary producer. After finishing remediation, the ECOPATH model is used to access the fish catch, the commercial
fish species added in the same year are harvested according to the assessment result, so that the balance of energy of the
ecosystem is maintained, the
fishing catch directly takes away a large quantity of nutritive salts in the
water body, and certain economic value is produced. The novel thinking for reference and the
technical support are provided for the remediation method taking the
scientific experiment as the method from the perspectives of
ecology, quantity and
energetics, and the method has a very important application value for the ecological remediation of the damaged
water body.