The invention discloses a low source-controlling
sewage-intercepting
system and a construction method, belongs to the technical field of riverway regulation, and aims at solving the problem that source-controlling
sewage-intercepting in the prior art for
sewage has incompletion in sewage interception, poorer
water body quality and a complex decontamination
system. The low source-controlling sewage-intercepting
system disclosed by the invention comprises interception purification function areas, wherein the interception purification function areas are arranged on drainage openings on the two sides of a riverway; each interception purification function area comprises an ecological interception purification
ditch and rainwater pretreatment facilities, the ecological interception purificationditch is arranged at the position where sewage is drained into river, and the rainwater pretreatment facilities are arranged at the rainwater
discharge openings on the two shores of a river
bank; theriverway is provided with econological function areas, and the downstream riverway is provided with strengthened purification function areas. As the function areas are scientifically divided, a complete, function-complementing low source-controlling sewage-intercepting system is formed,
ecological self-cleaning capacity of the riverway can be restored and enhanced, suspended
solid, dissolved organic matters and
nitrogen and
phosphate nutritive salt in water can be effectively reduced, and
water quality is stably controlled. The construction method for the low source-controlling sewage-intercepting system disclosed by the invention has the advantages of simple construction and low cost.