白洋淀流域氮、磷、COD负荷估算及来源解析

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摘要基于DEM数据,运用GIS工具划分子流域,并提取土地利用和土壤类型等空间相关资料,通过文献调研和区域情况调查获取模型参数,建立白洋淀流域氮、磷、COD污染负荷模型,并进行污染源解析.结果表明:流域氮负荷为31815.47t/a,主要来自种植和土壤侵蚀,贡献率分别为26.52%和21.03%;磷负荷为3873.33t/a,主要来自土壤侵蚀和种植,贡献率分别为30.78%和25.80%;流域COD负荷为110728.52t/a,主要来自畜禽养殖和城镇污水,贡献率分别为43.47%和23.53%.总体分析表明,种植、畜禽养殖、土壤侵蚀和城镇污水是影响白洋淀流域氮、磷、COD污染物的主要来源,需优先施以管控.

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	李悦昭
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关键词 ：白洋淀, 污染负荷, 源解析, 氮污染负荷, 磷污染负荷

Abstract：The study estimates the pollution loads of nitrogen, phosphorus and COD from various point and non-point sources in the basin of Lake Baiyang using several tools including export coefficients model, PLOAD model and revise universal soil loss equation. The model parameters were collected from literature and by field surveys, and the sub-watershed, soil types and land use types were extracted based on the Digital Elevation Model (DEM) data using GIS tool. Results showed that the nitrogen load in the area was 31815.47t/a, and were mainly sourced from the agricultural field runoff (26.52%) and soil erosion (21.03%). Similarly, the soil erosion and agricultural field runoff were identified as the dominators for phosphorus load (3873.33t/a), with the contribution ratios of 30.78% and 25.80%, respectively. While for COD (110728.52t/a), livestock discharges (43.47%) and municipal domestic sewage (23.53%) were the main contributors. Overall, our analysis suggested the agricultural field runoff, livestock discharges, soil erosion and municipal domestic sewage were the main sources of nitrogen, phosphorus and COD in the basin of Lake Baiyang and should be addressed in future.

Key words： Lake Baiyang pollution load source apportionment nitrogen pollution load phosphorus pollution load

收稿日期: 2020-05-25

PACS:	X171
	X144

基金资助:国家重点研发计划项目（2018YFC0406502）

通讯作者: 陈海洋,副教授,chen.haiyang@bnu.edu.cn E-mail: chen.haiyang@bnu.edu.cn

作者简介: 李悦昭(1989-),女,吉林长春人,硕士研究生,主要研究方向为重金属源解析.

引用本文:

李悦昭, 陈海洋, 孙文超. 白洋淀流域氮、磷、COD负荷估算及来源解析[J]. 中国环境科学, 2021, 41(1): 366-376. LI Yue-zhao, CHEN Hai-yang, SUN Wen-chao. Load estimation and source apportionment of nitrogen, phosphorus and COD in the basin of Lake Baiyang. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(1): 366-376.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2021/V41/I1/366

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