| 摘要 |
PURPOSE: A nonpoint-pollution filtration type permeation ditch purification system is provided to use the system permanently without the collapse after heavy rain, and to directly discharge latter term rain to outside by transferring the latter term rain along a bypass line to a discharge tub when first and second precipitation chambers are filled with initial rain. CONSTITUTION: A nonpoint-pollution filtration type permeation ditch purification system(10) includes a first precipitation chamber(20), a second precipitation chamber(30), and a filtering sand layer(44). The first precipitation chamber includes a nonpoint source pollutant inlet(21), a first hopper(22), and a short-circuit prevention panel(23). The short-circuit prevention panel prevents the inflow of suspended materials and fallen leaves inside nonpoint source pollutants into the next process. A lower-inclined branched T-pipe, and a left-right direction branched T-pipe(24) are installed on the inlet of the first precipitation chamber. The lower-inclined branched T-pipe guides initial rain into the first precipitation chamber. After the initial rain fills the first precipitation chamber into the high-water level, the left-right direction branched T-pipe guides latter term rain into a discharge tub(50). A bypass line(25) is connected from the left-right direction branched T-pipe to the discharge tub.
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