| 宁波农村地区典型河流氮磷污染特征分析 |
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| 引用本文： | 金树权,朱晓丽,周金波,胡杨,陈若霞.宁波农村地区典型河流氮磷污染特征分析[J].水土保持学报,2010,24(1). |
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| 作者姓名： | 金树权 朱晓丽 周金波 胡杨 陈若霞 |
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| 作者单位： | 1. 宁波市农业科学研究院生态环境研究所,浙江宁波,315040
2. 宁波市农村水利管理处,浙江宁波,315000 |
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| 基金项目： | 宁波市重大科技攻关择优委托项目(2008C50019); 宁波市农科院院长基金项目(2009-02) |
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| 摘 要： | 根据宁波农村地区四类典型河流(源头地区、农田河流、村镇河流和乡镇企业河流)不同形态氮磷的周年监测结果,结合同期降水量数据,全面分析研究了宁波农村地区河流氮磷污染特征。结果表明:(1)4类典型河流中,NO3--N的平均浓度顺序为农田河流乡镇企业河流源头地区村镇河流,NH4+-N、TN、DRP、TP的平均浓度大小顺序均为村镇河流乡镇企业河流农田河流源头地区,其中村镇河流的氮磷污染最严重,NH4+-N和TP有92.7%和65.6%的时间断面为劣Ⅴ类水质。(2)4类典型河流均属于磷限制型河流,可溶态氮磷浓度占总氮磷浓度都较高,尤其是村镇河流中的可溶态氮磷比例最高,占总氮磷比例分别高达80.0%和59.1%。(3)在源头地区和农田河流,TN和TP的平均浓度在枯水期最低,平水期最高;村镇河流和乡镇企业河流TN和TP的平均浓度随着降水量的增大而减少。
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| 关 键 词： | 宁波农村地区 河流 氮 磷 |
Pollution Characteristics of Nitrogen and Phosphorus in Typical Reaches in Rural Area of Ningbo |
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| JIN Shu-quan,ZHU Xiao-li,ZHOU Jin-bo,HU Yang,CHEN Ruo-xia.Pollution Characteristics of Nitrogen and Phosphorus in Typical Reaches in Rural Area of Ningbo[J].Journal of Soil and Water Conservation,2010,24(1). |
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| Authors: | JIN Shu-quan ZHU Xiao-li ZHOU Jin-bo HU Yang CHEN Ruo-xia |
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| Institution: | JIN Shu-quan1,ZHU Xiao-li2,ZHOU Jin-bo1,HU Yang2,CHEN Ruo-xia1 (1.Ecology , Environment Institute,Ningbo Academy of Agricultural Science,Ningbo,Zhejiang 315040,2.Ningbo Rural Water Management Division,Zhejiang 315000) |
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| Abstract: | Concentrations of different nitrogen and phosphorus forms were monthly monitored in four typical rivers (type Ⅰ : headwater area, type Ⅱ :rivers dominated by non-point source pollution, type Ⅲ: rivers dominated by sewage pollution in town and village, type Ⅳ : rivers dominated by industrial pollution from town and village enterprises) from September 2008 to October 2009 in rural area of Ningbo. Combined with the data of precipitation, pollution characteristics of nitrogen and phosphorus in rural area of Ningbo were analyzed in detail. The results showed that: (1) The mean concentrations of NO_3~--N were decreased in the sequence type Ⅱ > type Ⅳ> type Ⅰ > type Ⅲ, and the mean concentration of NH_4~+-N,TN,DRP,TP were all decreased in the sequence type Ⅲ> type Ⅳ > type Ⅱ > type Ⅰ. Nitrogen and phosphorus pollution were most seriously in rivers of type Ⅲ ,92.7% and 65.6% samples of NH_4~+-N and TP were worse than Grade V. (2) All four typical rivers were P-limited, and the ratios of soluble N and P to TN and TP were all high, especially in rivers of type Ⅲ, and the ratios were reached 80.0% and 59.1% respectively. (3) The mean concentrations of TN and TP were lest in low-flow period and most in high-flow period in rivers of typeIand type Ⅱ,meanwhile, the mean concentrations of TN and TP were decreased with the increase of precipitation. |
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| Keywords: | rural area of Ningbo river Nitrogen Phosphorus |
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