The invention discloses a sunk type green land rainwater
treatment system. The sunk type green land rainwater
treatment system comprises a sunk type green land, overflow wells, a pretreatment box and a
water storage tank, the left side of the right side of the sunk type green land are both provided with buffer trenches, a
water storage cavity is formed under the sunk type green land, the outer side of the
water storage cavity is provided with a drain
pipe opening, the left side and the right side of the sunk type green land are both provided with overflow
pipe openings, the left side and the right side of each buffer trench are provided both with overflow wells, and the drain
pipe opening is connected to a rain inlet of a filtering
hydrocyclone through a connecting pipe. The construction method comprises the steps of 1, early-stage management; 2, establishment of the sunk type green land, 3, establishment of the overflow wells; 4, installation of the pretreatment box and the water storage box; 5, installation of the filtering
hydrocyclone; 6, cleanup, check and repair. The sunk type green land rainwater
treatment system is simple in structure and high in practicability, the whole rainwater treatment
system is convenient in use, east to construct, convenient in later maintenance, check and repair, much in rain storage amount, and capable of dealing with the condition that a city has a large amount of rainfall.