考虑降水和地形的京津冀水库流域非点源污染负荷估算

发布时间：2018-04-13 23:30

本文选题：水库 + 污染　；参考：《农业工程学报》2017年04期

【摘要】：为了研究京津冀地区水库流域非点源污染现状,该文选取京津冀地区17座重要的水源地水库,运用修正的输出系数模型对水库流域非点源总氮(TN,total nitrogen)、总磷(TP,total phosphorus)输出负荷进行估算,结果表明:1)TN与TP负荷量空间分布具有一致性,TN负荷量较大的水库流域,TP负荷量也较大。TN与TP负荷量的平均比值为6.73。2)TN、TP负荷强度具有空间异质性。TN负荷强度为1.04~24.91 t/km~2·a,TP负荷强度为0.11~3.89 t/km~2·a。唐山、秦皇岛地区水库面临着更大的氮磷污染风险。3)不同污染源对TN负荷贡献率的顺序是土地利用农村生活牲畜养殖,对TP负荷贡献率的顺序是农村生活土地利用牲畜养殖。4)运用水库营养状态指数(EI,eutrophication index)对模拟结果进行验证。EI指数分别与TN、TP负荷强度呈显著相关关系(r=0.562,P0.05;r=0.558,P0.05),表明模拟出的TN、TP负荷与实际情况较符合,模型具有应用潜力。
[Abstract]:In order to study the present situation of non-point source pollution in reservoir basin in Beijing-Tianjin-Hebei region, 17 important water source reservoirs in Beijing-Tianjin-Hebei region are selected in this paper. The output load of total total nitrogen (TN) total nitrogen (TP) total phosphorus (TP) total nitrogen (TP) total nitrogen (TP) total nitrogen (TP) total in the reservoir basin is estimated by using the modified output coefficient model.The results show that the spatial distribution of TN and TP load is consistent. The average ratio of TN to TP load is 6.73.2% TNTP load intensity. The spatial heterogeneity of TN load intensity. TN load intensity is 1.04m 24.91 t/km~2 / ATP load intensity is 0.113.89 t/km~2 a.Tangshan, Qinhuangdao Reservoir is facing a greater risk of nitrogen and phosphorus pollution. 3) the order of the contribution of different pollution sources to TN load is land use and rural livestock farming.The contribution rate of TP load is in the order of rural land use livestock breeding. 4) the simulation results are verified by the reservoir nutritional status index (EIU eutrophication index). Ei index is significantly correlated with the TNT TP load intensity, respectively, indicating that the simulated results are 0.558% P0. 558% and 0. 558% P0. 05% respectively.The TNTP load is in good agreement with the actual situation.The model has application potential.
【作者单位】：中国科学院生态环境研究中心城市与区域生态国家重点实验室;中国科学院大学;
【基金】：国家自然科学基金重大项目(41590841)
【分类号】：X524

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