北戴河及相邻地区近岸海域农业面源污染测算及特征分析

运用源强系数法对2011年北戴河及相邻地区近岸海域农业面源污染进行测算,并分析北戴河海域农业面源污染特征,旨在为北戴河及相邻地区近岸海域水体污染的防治提供理论依据。结果表明,2011年北戴河及相邻地区近岸海域农业面源化学需氧量(COD)排放量为38 768.27t,总氮(TN)为15 684.63t,总磷(TP)为7 821.18t,其中COD排放量是同年秦皇岛市工业废水中COD排放量的6倍;种植业是N、P污染的主要来源,对TN和TP的贡献率分别为49.10%和85.83%,农村生活源、畜禽养殖业和水产养殖业对COD的贡献率分别为35.84%、33.40%、30.76%;四县农业面源污染明显比三区严重,其中昌黎县农业面源污染最重,北戴河区污染最轻。

Estimation of Agricultural Non-point Source Pollution Emission in Beidaihe Coastal Waters and Its Characteristic Analysis

By using the data collected in Beidaihe and adjacent areas in 2011,this paper calculated their pollution emissions by pollution discharge coefficient method,and analyzed agricultural non-point source pollution characteristics,aiming to provide a theoretical basis for prevention and control of water pollution in Beidaihe and adjacent areas of coastal waters.The results showed that the COD,TN,TP emission were 38 768.27 t,15 684.63 t and 7 821.18 t,respectively,in 2011.The COD emission of agricultural non-point source pollution was six times higher than that in industrial wastewater in the same year in Qinhuangdao city.Planting was the main source of N and P pollution,and the contribution rate of TN and TP were 49.10% and 85.83%,respectively.The COD contribution rate in rural life,livestock farming and aquaculture was 35.84%,33.40% and 30.76%,respectively.Agricultural non-point source pollution in four counties was more serious than the three districts.In this investigation,agricultural non-point source pollution was the most serious in Changli county,and the lightest was Beidaihe district.