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Water shortage is a global problem, the rain water as a cost-effective is gradually promoted. As a large agricultural country, China's rural water scarcity problem even worse compared to urban water for rural runoff and runoff water quality analysis has also become a research direction can not be ignored. In a lot of access to domestic and foreign literature and application examples, based on two typical villages selected Beijing courtyard as the research object, monitoring 2009 -2010 2 10 games during the rainy season rainfall events and patio roof runoff water quality, pollutant concentrations etc., analysis and testing of the courtyard patio roof runoff and surface runoff of major types of pollutants, the concentration range of particle size distribution and correlation of various pollutants indicators law. Basic data combined roofing and patio rainfall event mean concentrations of pollutants and pollution load, while research and patio roof rainfall runoff first flush effect, raise the roof and yard runoff reuse methods. The results showed that the roof rain water meets miscellaneous water, landscape water supplement water quality standards. SS is the main pollutants in roof runoff. Roof runoff TP, TN, SS, COD's EMC mean 0.057mg / L, 4.195mg / L, 49.124mg / L, 28.517mg / L. Roof runoff pollution towns obvious first flush effect. 30% of the total runoff of rainfall runoff early migration of 69.7% of the suspended particles. Courtyard rainwater poor water quality, and other miscellaneous water life can not meet water quality standards. SS in the courtyard of rainfall runoff is a major pollutant. Fully hardened surface runoff courtyard TP, TN, SS, COD mean of EMC were 21.53mg / L, 38.289mg / L, 8.353mg / L, 1.141mg / L, semi-hardened surface courtyard runoff TP, TN, SS, The EMC COD mean 49.02 mg / L, 154.983 mg / L, 6.831 mg / L, 0.704 mg / L. Fully hardened faces the courtyard of the SS and COD concentrations below the semi-hardened surface courtyard. Courtyard there early runoff erosion, but the semi-hardened courtyard initial effect is not obvious. Towns and villages can be monomer patio roof rainwater roof rainwater collection system storage, after simple treatment can precipitate as flushing, green and reuse for landscape water bodies. Courtyard fully hardened surface runoff can be collected through the pipeline savings can be as simple sedimentation in water use. Semi-hardened surface runoff can be discharged into the courtyard and the road ditches supplemented with landscape water runoff
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