| 卢俊平,马太玲,张晓晶,刘廷玺,于淑玉.典型沙源区水库大气氮干、湿沉降污染特征研究[J].农业环境科学学报,2015,34(12):2357-2363. |
| 典型沙源区水库大气氮干、湿沉降污染特征研究 |
| Reservoir Pollution by Dry and Wet Deposition of Atmospheric Nitrogen in Typical Sand Area |
| 投稿时间：2015-05-11 |
| DOI：10.11654/jaes.2015.12.015 |
| 中文关键词: 沙源区 大河口水库 总氮 干沉降 湿沉降 |
| 英文关键词: sand source areas Dahekou Reservoir total nitrogen dry deposition wet deposition |
| 基金项目:国家自然科学基金资助项目(51369020);内蒙古自然科学基金资助项目(2012MS0614) |
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| 中文摘要: |
| 为研究典型沙源区水库大气氮干、湿沉降污染特征及其对水域氮素污染的贡献,以京蒙沙源区大河口水库库区为研究区,于2014年沿水库岸边布设12个大气氮沉降监测站点,采集干、湿沉降样本,测定干、湿沉降TN质量浓度,计算全年各月大气TN干、湿沉降通量和年入库TN污染负荷量。结果表明,研究区大气干、湿沉降季节差异显着(P<0.05):全年各月TN干沉降通量变化范围为116.31~382.02 kg·km-2,主要集中在春季4月和秋季10月,最大TN干沉降通量出现在春季风沙最为严重的4月,其值为382.02 kg·km-2;湿沉降通量变化范围为0.73~195.53 kg·km-2,主要集中在夏季(6-8月),最大TN湿沉降通量出现在降水量最大的8月,其值为195.53 kg·km-2.大气氮沉降以干沉降为主,全年月平均TN干沉降通量是湿沉降通量的2.9倍,且TN湿沉降通量与降水量变化呈显着正相关(R2=0.961 3).同入库河流径流TN污染负荷对比,2014年大气TN沉降入库污染负荷量为7.15 t,占同年滦河和吐力根河两条河流入库TN污染负荷的19.91%. |
| 英文摘要: |
| The water pollution caused by dry and wet deposition of atmospheric nitrogen has aroused wide concerns. In this study, Dahekou Reservoir, located in Beijing and Inner Mongolian sand source area, was chosen to quantify the contribution of dry and wet deposition of atmospheric nitrogen to reservoir pollution in sand area. The effects of different seasons on deposition fluxes were also compared. Results showed that the highest cumulative TN of dry deposition and wet deposition appeared in April and August, which was 382.02 kg·km-2 and 195.53 kg·km-2, respectively. Dry deposition was the main form of the atmospheric nitrogen deposition. The monthly mean TN dry deposition flux was 2.9 folds of the monthly mean wet deposition flux. The wet TN deposition increased with increasing rainfall. In 2014, the atmospheric TN deposition contributed 7.15 t to Dahekou Reservoir, accounting for 19.91% of TN loads combined from Luan river and Tuligen river during the same period. |
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