湟水流域典型区农业面源污染特征解析及空间格局
湟水流域典型区农业面源污染特征解析及空间格局
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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S276; [目的]明确湟水流域农业面源污染排放的时空特征及污染贡献来源.[方法]采用排污系数法估算湟水流域典型区2010-2018年总氮(TN)、总磷(TP)、化学需氧量(COD)、氨态氮(NH3-N)的排放量和排放强度,运用时空分析及冷热点分析揭示不同类型农业面源污染的时空演变及空间格局.[结果]从时间上看,来自畜禽养殖和农村生活源的污染排放量呈上升趋势,来自种植业源的污染排放量呈下降趋势;从污染物排放类型来看,TN、COD、NH3-N排放量增加,TP排放量减少;从空间分布上看,污染排放强度在峡门桥和金滩断面区域较小,进入新宁桥后整体较高;排放负荷贡献率为畜禽养殖业＞农村生活＞种植业,其中COD为首要污染物.从冷热点分析来看,热点区主要分布在桥头桥、新宁大通桥、西钢桥、西宁城东区,冷点区...
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湟水流域典型区农业面源污染特征解析及空间格局
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TN_cdi_wanfang_journals_ggps202306011
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https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_wanfang_journals_ggps202306011
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1672-3317
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10.13522/j.cnki.ggps.2022468
