摘要
[Objective] The aim was to analyze the pollution characteristics of surface runoff in Zhenjiang City.[Method] On July 4 and August 16,2010,surface runoff samples were collected in different rainfall durations in Zhenjiang City,and the variation characteristics of suspended substance (SS),chemical oxygen demand (CODCr),ammonia nitrogen (NH3-N) and total phosphorus (TP) in surface runoff were analyzed.[Result] With the increase of rainfall duration,SS concentration in surface runoff of Zhenjiang City on July 4 and August 16,2010 went up firstly and then went down,with the maximum concentration of 1 240 and 160mg/L,respectively,and the decreasing rang of SS concentration in the late stage of rainfall on July 4 was obviously greater than that of August 16 due to stronger rainfall on July 4.The general variation of CODCr was similar to that of SS concentration,and the change range of CODCr on July 4 (32-212mg/L) was larger than that of August 16 (13-53mg/L).In addition,the variation trends of NH3-N and TP concentration were similar,namely they increased firstly and then reduced rapidly,and the decreasing range of NH3-N and TP concentration was greater than that of SS concentration in the late stage of rainfall.[Conclusion] The research results could provide references for the study on water quality variation characteristics and treatment of surface runoff.
[Objective] The aim was to analyze the pollution characteristics of surface runoff in Zhenjiang City.[Method] On July 4 and August 16,2010,surface runoff samples were collected in different rainfall durations in Zhenjiang City,and the variation characteristics of suspended substance (SS),chemical oxygen demand (CODCr),ammonia nitrogen (NH3-N) and total phosphorus (TP) in surface runoff were analyzed.[Result] With the increase of rainfall duration,SS concentration in surface runoff of Zhenjiang City on July 4 and August 16,2010 went up firstly and then went down,with the maximum concentration of 1 240 and 160mg/L,respectively,and the decreasing rang of SS concentration in the late stage of rainfall on July 4 was obviously greater than that of August 16 due to stronger rainfall on July 4.The general variation of CODCr was similar to that of SS concentration,and the change range of CODCr on July 4 (32-212mg/L) was larger than that of August 16 (13-53mg/L).In addition,the variation trends of NH3-N and TP concentration were similar,namely they increased firstly and then reduced rapidly,and the decreasing range of NH3-N and TP concentration was greater than that of SS concentration in the late stage of rainfall.[Conclusion] The research results could provide references for the study on water quality variation characteristics and treatment of surface runoff.
基金
Supported by National Science and Technology Key Project of Water Pollution Control and Management(2008ZX07317-001)
