【摘要】：為闡明典型沙源區(qū)水庫大氣磷干、濕沉降的污染特征及其對水域磷素污染的貢獻,為水庫富營養(yǎng)化治理提供科學(xué)依據(jù),以京蒙沙源區(qū)大河口水庫庫區(qū)為研究區(qū),于2014年沿水庫岸邊布設(shè)12個大氣沉降監(jiān)測站點,采集干、濕沉降樣品,測定干、濕沉降中總磷(TP)濃度,計算全年各月大氣TP干、濕沉降通量和年入庫TP污染負(fù)荷量.結(jié)果表明:研究區(qū)大氣干、濕沉降季節(jié)差異顯著,全年各月TP干沉降通量變化范圍為4.89~35.76 kg/(km~2·月),主要集中在春季4月和秋季10月.最大TP干沉降通量出現(xiàn)在春季風(fēng)沙最為嚴(yán)重的4月;濕沉降主要集中在夏季(6—8月),最大TP濕沉降通量出現(xiàn)在降雨量最大的8月,為28.88 kg/(km~2·月),且TP濕沉降通量與降雨量呈顯著正相關(guān).2014年大氣TP沉降入庫污染負(fù)荷量為0.719 t,占同期灤河和吐力根河兩條河流入庫TP污染負(fù)荷比率為51.17%,成為影響和限制大河口水庫磷營養(yǎng)鹽水平的重要源項之一.
[Abstract]:In order to clarify the pollution characteristics of atmospheric phosphorus drying and wet deposition of reservoirs in typical Shayuan area and their contribution to phosphorus pollution in water areas, and to provide scientific basis for reservoir eutrophication treatment, the Dahekou Reservoir area of Shayuan District, Beijing and Mongolia, is taken as the study area. In 2014, 12 monitoring stations were set up along the bank of the reservoir to collect dry and wet deposition samples, to measure the total phosphorus (TP) concentration in dry and wet deposition, and to calculate the dry and wet deposition fluxes of TP and the annual TP pollution load in each month of the year. The results show that there are significant seasonal differences between dry and wet deposition in the study area. The variation range of TP dry deposition flux in every month of the year is 4.89 脳 35.76 kg/ (km~ February 路month), mainly in April in spring and October in autumn. The maximum dry deposition flux of TP occurred in April, which was the most serious sand storm in spring. The wet deposition mainly occurred in summer (June-August), and the largest TP wet deposition flux occurred in August, when the rainfall was the largest, was 28.88 kg/ (km~ February 路month). The wet deposition flux of TP was significantly positively correlated with rainfall. In 2014, the pollution load of atmospheric TP deposition into the reservoir was 0.719 t, accounting for 51.17% of the TP pollution load ratio of Luanhe River and Turigen River in the same period. It has become one of the important sources to influence and limit the phosphorus nutrient level in Dahekou Reservoir.
【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;
【基金】：國家自然科學(xué)基金項目(51369020,51669023) 內(nèi)蒙古自然科學(xué)基金項目(2012MS0614)聯(lián)合資助
【分類號】：X51;X524

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