CAJ | 학술논문

水田退水携带的COD是河湖水体的重要面源污染物之一。经过对前郭灌区典型水田、地下潜水、排水干渠水体中COD的监测,并对近两年大规模开展的节水改造工程效果进行了分析,认为水田COD主要是通过地表径流和垂直渗漏两个方式迁移,其中退水导致的地表迁移占较大比例;节水改造工程减少了地表退水量,削减COD的效果较显著,削减率与在排水干渠实测的数据基本吻合,表明节水灌溉工程也是削减农田面源污染物COD的有效方式和可靠手段。
수전퇴수휴대적COD시하호수체적중요면원오염물지일。경과대전곽관구전형수전、지하잠수、배수간거수체중COD적감측,병대근량년대규모개전적절수개조공정효과진행료분석,인위수전COD주요시통과지표경류화수직삼루량개방식천이,기중퇴수도치적지표천이점교대비례;절수개조공정감소료지표퇴수량,삭감COD적효과교현저,삭감솔여재배수간거실측적수거기본문합,표명절수관개공정야시삭감농전면원오염물COD적유효방식화가고수단。
COD in paddy carried by water recharge is an important non-point source pollutant to rivers and lakes.after the experienced monitoring COD in a typical paddy field,underground water,drainage canal in Qianguo irrigation district,and carried out analysis of the water-saving effect on a large scale renovation project for the last two years,the conclusion is that COD contained in paddy is mainly migrated by surface runoff and vertical leakage,in which the former accounted for a large proportion;The water-saving renovation have reduced the amount of the recharge of surface water and COD,which amount reduced basically consistent with the measured data in the drainage canal.It indicates that the water-saving irrigation project is also an effective and reliable measure to reduce COD of agricultural non-point source pollution.