关键词: 城市湖泊湿地, 缓冲区, 土地利用方式, 水质, 相关性, 大庆市

Abstract: [Objective] The typical lake wetland in Daqing city was regarded as a research objective to explore the effects of land use types in the buffer zone surrounding the lake wetlands on water quality. [Method] With the support of RS and GIS technology, based on the GeoEye-1 high resolution satellite remote sensing data in 2009 and the monitoring data of water quality during the period from March 2009 to February 2010, GIS spatial analysis technology and SPSS analysis were used to analyze the relationship between the area proportion of land use types in the buffer zone and water quality. [Results] As a result, land use type in the buffer zone has an obvious scale dependence and scale effect on the water quality. On the 1 000 m and 500 m scale, the grassland was a key factor affecting water quality. Proportion of grassland was significantly negatively correlated with NH₃-N, TN and COD_Mn content in water. On the 100 m scale, swamp, grassland was key factors affecting water quality. Area proportion of grassland was significantly negatively correlated with NH₃-N, TN and COD_Mn content in water. However, area proportion of swamp was significantly positively correlated with NH₃-N, TN and COD_Mn content in water. [Conclusion] The water quality of urban lake wetlands is obviously affected by land use type in the buffer zone and the responses of water quality to land use was shown on the multi-scales.

Key words: urban-lake wetlands, buffer zone, land use pattern, water quality, correlation, Daqing city