旱流污水 meaning in English

dry weather flow

To further minimise the problem caused by wastewater found in the communal drains , the drainage services department had installed a dry - weather flow interceptor in the section of the underground communal drainage system around the intersection of dundas street and portland street . during dry weather , the interceptor can intercept the wastewater discharged into the communal drainage system and divert it back to the communal sewerage system
为进一步减低流入公用排水渠的污水所造成的问题，渠务署亦已于登打士街和?兰街交界的地下公用排水系统设置旱流污水截流设施，在无雨的时候将排放到公用排水系统中的污水引回公用污水系统。