【摘要】：為揭示北方寒區(qū)水庫(kù)氮、磷營(yíng)養(yǎng)鹽濃度時(shí)空分布特征和變化規(guī)律,有代表性地選擇了錫林郭勒盟多倫縣大河口水庫(kù)18個(gè)水質(zhì)監(jiān)測(cè)點(diǎn)進(jìn)行采樣檢測(cè),并以2014年5,7,10,12月水庫(kù)各采樣點(diǎn)水質(zhì)參數(shù)指標(biāo)為基礎(chǔ),應(yīng)用ArcGIS9.2統(tǒng)計(jì)模塊分析不同期水庫(kù)氮、磷營(yíng)養(yǎng)鹽濃度的時(shí)空變異性。結(jié)果表明:大河口水庫(kù)NH_4~+-N、NO_3~--N、TN和TP等主要營(yíng)養(yǎng)鹽因子既有明顯的季節(jié)變化特征,也存在顯著的空間分布差異。水庫(kù)TN、TP濃度由高到低呈現(xiàn)出秋、夏、春、冬季節(jié)性變異特征,且冬季與春、夏、秋3季差異顯著;秋、冬季NH_4~+-N濃度明顯高于春、夏季;夏季NO_3~--N濃度明顯高于其他季節(jié)。在空間分布上,水庫(kù)NH_4~+-N、NO_3~-N、TN、TP濃度分布呈現(xiàn)春季由庫(kù)中心水域向周邊逐漸降低,其他季節(jié)由灤河、吐力根河入庫(kù)水域向出口處逐漸降低的顯著空間變異特征。大河口水庫(kù)氮、磷營(yíng)養(yǎng)鹽濃度時(shí)空變異特征受季節(jié)、水動(dòng)力學(xué)特征、冰封和凍融等自然因素和人類生產(chǎn)、生活排污的人為影響均較為顯著。
[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.
【作者單位】： 內(nèi)蒙古農(nóng)業(yè)大學(xué)水利與土木建筑工程學(xué)院;煙臺(tái)大學(xué)土木工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51369020,51669023) 內(nèi)蒙古自然科學(xué)基金資助項(xiàng)目(2016MS0224)
【分類號(hào)】：X524

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