北方寒区水库氮、磷营养盐的时空变异特征
发布时间：2018-11-04 10:57
【摘要】：为揭示北方寒区水库氮、磷营养盐浓度时空分布特征和变化规律,有代表性地选择了锡林郭勒盟多伦县大河口水库18个水质监测点进行采样检测,并以2014年5,7,10,12月水库各采样点水质参数指标为基础,应用ArcGIS9.2统计模块分析不同期水库氮、磷营养盐浓度的时空变异性。结果表明:大河口水库NH_4~+-N、NO_3~--N、TN和TP等主要营养盐因子既有明显的季节变化特征,也存在显著的空间分布差异。水库TN、TP浓度由高到低呈现出秋、夏、春、冬季节性变异特征,且冬季与春、夏、秋3季差异显著;秋、冬季NH_4~+-N浓度明显高于春、夏季;夏季NO_3~--N浓度明显高于其他季节。在空间分布上,水库NH_4~+-N、NO_3~-N、TN、TP浓度分布呈现春季由库中心水域向周边逐渐降低,其他季节由滦河、吐力根河入库水域向出口处逐渐降低的显著空间变异特征。大河口水库氮、磷营养盐浓度时空变异特征受季节、水动力学特征、冰封和冻融等自然因素和人类生产、生活排污的人为影响均较为显著。
[Abstract]:In order to reveal the spatial and temporal distribution of nitrogen and phosphorus concentrations in reservoirs in cold northern regions, 18 water quality monitoring sites of Daguhekou Reservoir in Dollar County of Xilingol were selected for sampling and testing. Based on the indexes of water quality parameters of different sampling sites in October and December, the temporal and spatial variability of nitrogen and phosphorus concentrations in different reservoirs were analyzed by ArcGIS9.2 statistical module. The results show that the main nutrient factors, such as NH_4~, N, TN and TP, in Dahekou Reservoir, not only have obvious seasonal variation characteristics, but also have significant spatial distribution differences. From high to low, the TN,TP concentration of the reservoir showed seasonal variation in autumn, summer, spring and winter, and the difference between winter and spring, summer and autumn was significant, and the concentration of NH_4~-N in autumn and winter was obviously higher than that in spring and summer. The concentration of NO_3~--N in summer was significantly higher than that in other seasons. In terms of spatial distribution, the concentration distribution of TP in the reservoir NH_4~ _ Nnn _ 3C _ N _ T _ 3 in the reservoir decreased gradually from the central waters to the periphery in spring, and in other seasons by the Luanhe River. The significant spatial variation characteristics of Tuligan River gradually decreasing toward the outlet. The temporal and spatial variation characteristics of nitrogen and phosphorus concentrations in Dahekou Reservoir were significantly affected by natural factors such as season, hydrodynamics, ice and freeze-thaw, and human production, and the anthropogenic effects of domestic sewage discharge.
【作者单位】： 内蒙古农业大学水利与土木建筑工程学院;烟台大学土木工程学院;
【基金】：国家自然科学基金项目(51369020,51669023) 内蒙古自然科学基金资助项目(2016MS0224)
【分类号】：X524
本文编号：2309611
[Abstract]:In order to reveal the spatial and temporal distribution of nitrogen and phosphorus concentrations in reservoirs in cold northern regions, 18 water quality monitoring sites of Daguhekou Reservoir in Dollar County of Xilingol were selected for sampling and testing. Based on the indexes of water quality parameters of different sampling sites in October and December, the temporal and spatial variability of nitrogen and phosphorus concentrations in different reservoirs were analyzed by ArcGIS9.2 statistical module. The results show that the main nutrient factors, such as NH_4~, N, TN and TP, in Dahekou Reservoir, not only have obvious seasonal variation characteristics, but also have significant spatial distribution differences. From high to low, the TN,TP concentration of the reservoir showed seasonal variation in autumn, summer, spring and winter, and the difference between winter and spring, summer and autumn was significant, and the concentration of NH_4~-N in autumn and winter was obviously higher than that in spring and summer. The concentration of NO_3~--N in summer was significantly higher than that in other seasons. In terms of spatial distribution, the concentration distribution of TP in the reservoir NH_4~ _ Nnn _ 3C _ N _ T _ 3 in the reservoir decreased gradually from the central waters to the periphery in spring, and in other seasons by the Luanhe River. The significant spatial variation characteristics of Tuligan River gradually decreasing toward the outlet. The temporal and spatial variation characteristics of nitrogen and phosphorus concentrations in Dahekou Reservoir were significantly affected by natural factors such as season, hydrodynamics, ice and freeze-thaw, and human production, and the anthropogenic effects of domestic sewage discharge.
【作者单位】： 内蒙古农业大学水利与土木建筑工程学院;烟台大学土木工程学院;
【基金】：国家自然科学基金项目(51369020,51669023) 内蒙古自然科学基金资助项目(2016MS0224)
【分类号】：X524
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