The invention discloses a
system for farmland surface source
sewage collection and storage applicable to a rainy area and a reforming method. The
system comprises a water collecting
ditch system, a sand
sediment well, a
flow diversion well, an initial rain pond, an ecological pond and a drainage ecological
ditch which are successively communicated with one another along a
water flow direction, wherein rainwater discharged from farmland is collected by the water collecting
ditch system; after settleable muddy sand is removed by the sand
sediment well, an initial runoff is separated from a laterrunoff by the
flow diversion well, and the initial runoff and the later runoff are respectively discharged into the initial rain pond and the ecological pond; and the rainwater purified by the ecological pond is discharged into the drainage ecological ditch, further purified and then discharged into a nearby water system. Decontamination and
flow diversion are automatically carried out through the flow diversion well, and the initial runoff with a
high concentration of pollutants and the later runoff with a low concentration of pollutants are stored and reused, so as to reduce the amount of afertilizer used at the source, reuse resources, reduce both the amount of water and the concentration of pollutants, and reduce the
discharge of pollutants. Meanwhile, economic plants and fishes areharvested, so that the system has certain
economic benefits.