發(fā)布時間：2018-04-27 16:24

  本文選題：水質(zhì) + 聚類分析��； 參考：《長江流域資源與環(huán)境》2017年02期

【摘要】：基于太湖流域典型丘陵水源地平橋河流域12個采樣點的水質(zhì)監(jiān)測數(shù)據(jù),綜合運用聚類分析和主成分分析法對平橋河流域水質(zhì)時空變化及影響因素進行分析。聚類分析顯示,按照水質(zhì)相似性將平橋河流域水質(zhì)分為枯水期、平水期、豐水期3個季節(jié)時段和中上游丘陵河谷區(qū)、下游緊鄰平橋鎮(zhèn)的平原區(qū)、下游暗溝出口區(qū)3個典型空間區(qū)域。主成分分析顯示:(1)枯水期水質(zhì)以氮污染為主導(dǎo)因素,磷和有機污染次之,受流量減小、流速緩慢導(dǎo)致的營養(yǎng)鹽富集的影響加大;平水期水質(zhì)以氮污染為主導(dǎo)因素,磷污染次之,受茶園等大量施肥導(dǎo)致的農(nóng)業(yè)面源污染的影響;豐水期水質(zhì)以氮和磷污染為主導(dǎo)因素,受到水稻種植等農(nóng)業(yè)活動和大量降雨徑流的影響。(2)中上游丘陵河谷區(qū)水質(zhì)以氮和磷污染為主導(dǎo)因素,有機污染次之,受到茶園種植等農(nóng)業(yè)活動導(dǎo)致的面源污染的影響;下游緊鄰平橋鎮(zhèn)的平原區(qū)水質(zhì)以氮和磷的污染為主導(dǎo)因素,有機污染次之,受到居民生活污水和農(nóng)業(yè)生產(chǎn)的影響;下游暗溝出口區(qū)水質(zhì)以氮污染為主導(dǎo)因素,有機污染和磷污染次之,受到生活污水、農(nóng)業(yè)生產(chǎn)和畜禽養(yǎng)殖的影響。研究結(jié)果可為太湖流域丘陵區(qū)水源地保護和管理提供參考。
[Abstract]:Based on the water quality monitoring data of 12 sampling sites in Pingqiao River Basin, a typical hilly area in Taihu Basin, cluster analysis and principal component analysis were used to analyze the temporal and spatial variation of water quality in Pingqiao River Basin and its influencing factors. Cluster analysis shows that according to the similarity of water quality, the water quality of Pingqiao River Basin is divided into three periods: dry season, plain water period, abundant water period, and the upper-middle hilly valley area, and the plain area in the lower reaches adjacent to Pingqiao Town. There are three typical space areas in the outlet area of the lower reaches. Principal component analysis (PCA) showed that nitrogen pollution was the dominant factor in water quality during dry season, followed by phosphorus and organic pollution, and the effect of nutrient enrichment caused by low flow rate and slow flow rate was increased, while nitrogen pollution was the leading factor, phosphorus pollution was the second. Affected by agricultural non-point source pollution caused by a large amount of fertilization in tea plantations, nitrogen and phosphorus pollution are the dominant factors in water quality in high water season. Under the influence of agricultural activities such as rice planting and a large amount of rainfall runoff, the water quality in the upper-upper hilly and valley areas is dominated by nitrogen and phosphorus pollution, followed by organic pollution, and by non-point source pollution caused by agricultural activities such as tea plantation. The pollution of nitrogen and phosphorus is the dominant factor in the water quality in the plain area near Pingqiao Town, followed by the organic pollution, which is influenced by the domestic sewage and agricultural production, and the nitrogen pollution is the dominant factor in the water quality of the outlet area of the lower reaches of Shaogou. Organic pollution and phosphorus pollution were followed by domestic sewage, agricultural production and livestock and poultry breeding. The results can provide reference for water source protection and management in the hilly area of Taihu Lake Basin.
【作者單位】： 中國科學(xué)院南京地理與湖泊研究所流域地理學(xué)重點實驗室;中國科學(xué)院大學(xué);
【基金】：中國科學(xué)院“百人計劃”項目(Y5BR011001) 國家自然科學(xué)基金項目(41471460,42501552) 江蘇省自然科學(xué)基金項目(BK20161612)~~
【分類號】：X524

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本文編號：1811451