The invention relates to an ecological
restoration method for a city watercourse. The ecological
restoration method for the city watercourse is characterized in that the polluted city watercourse is comprehensively restored with the combination of physical, biological and ecological technologies, the ecological theory is used for reference in the treatment process, the ecological idea is used as the guiding thought, a complex water
ecosystem structure is constructed and restored, the original
natural state of the watercourse is restored, the self-cleaning capacity of a river
system is improved, the environment is beautified, and the local city microclimates are improved at the same time. The ecological
restoration method mainly comprises the steps of (1) controlling a
pollution source, (2) modifying the river
bank, (3) optimizing the environment of the river bottom, (4) modifying the watercourse, (5) conducting
aeration and
oxygenation, (6) constructing an
aquatic plant community, (7) constructing a fish and macrobenthos
community, and (8) maintaining the
system. The watercourse ecological
system restored through the ecological restoration method has the certain anti-interference capacity, on the premise that a large amount of exogenous
pollution is
cut off, the certain-strength interference can be resisted, and the good ecological
environmental effect is obtained. After one-time input, the better ecological benefit can be obtained only with a small number of maintenance costs.