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1、 2010 , 29(4):725-732 Journalof Agro-EnvironmentScience GIS 、 、 。 645 682 437 595 20 。 20 。 。 。 X522 A 1672-2043(2010)04-0725-08 130012 AnalysisofEnvironmentalFactorsInfluencingNon-pointSourcePollutants TANG Yan-ling,ZHANG Guang-xin Key Laboratory of Wetland Ecology and Environment, Northeast Instit
2、ute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012,China Abstract Based on the observed data in monitored drainage areas and GIS spatial analysis tools, watershed basic database of Shitoukoumen Reservoir Basin was built. Multivariate analysis and partial redundancy analy
3、sis pRDA were employed to analyze the contribution of the dif ferent influencing factors, including natural environment factors, anthropogenic disturbance factors and watershed scale factors, and their in teraction between them to water quality during dry season and rainy season. In addition, pRDA w
4、as also used to investigate the effect of the different influencing factors on the main types and forms of the non-point source NPS pollutant export. The results showed that different in fluencing factors led to great changes in water quality at spatial and seasonal scales. All selected influencing
5、factors explained 64.5% and 68.2% of the spatial variation of water quality over dry season and rainy season, respectively, which shows clear seasonal difference. Natural environment factors played the key role on the spatial variation of water quality associated with the NPS pollution, which explai
6、ned 43.7% and 59.5% of the spatial variation of water quality during dry and rainy season, respectively. And anthropogenic disturbance factors were the second important factors, which possess above 20% of the spatial variation during both dry and rainy season. The interaction between natural environ
7、ment factors and anthropogenic disturbance factors resulted in more NPS pollutant export during dry season than that during rainy season, whichthe former possesses above 20% of the spatial variation of water quality and the latter does less 5%. During dry season, residen tial land used of anthropoge
8、nic disturbance factors dominates some NPSexport, including the ammonia nitrogen, particle organic nitrogen and organic matter, and meanwhile discharge area of scale factors controlled dissolved phosphor and organic matter export. During rainy season, interaction of different influencing factors con
9、trolledthe types andforms of NPS pollutant export. Keywords non-point source pollution;watershedscale; environmental factor pattern; redundancy analysis; ShitoukoumenReservoir 2009 10 14 2006SYHZ0025 KZCX2YWQ062 KZCX2YW126 1978 。 Email tangyl78126com Email zhgxneigaeaccn2 0 10 4 1-2。 3。 。 4-7 8-10。 。 、 、 、 、
