摘要
河岸土地利用方式和空间格局直接影响河流生态系统的完整性及其功能.在划分11个河段的基础上,对布尔哈通河河岸100 m范围内土地利用方式进行了调查,并对调查点的河水pH和6种重金属含量进行了测定与分析.结果表明:1)布尔哈通河河岸土地利用类型中农田比例最高,并且在河流的中游最为集中,其次为草甸、森林和湿地等类型;2)pH和重金属含量变化具有一定的规律性,表现出与沿河土地利用方式和城镇居民点的分布关系密切;3)6种重金属贯穿于整条河流,而且变化范围较大,但除汞高于国家地表水Ⅴ类标准外,其余重金属含量均处于国家地表水Ⅰ类或Ⅱ类水平.
The land-use types and spatial pattern directly influenced the integrality and function of river ecosystem.The research had analyzed the land-use patterns of the riparian zone in 100 m range,and the content of 6 kinds of heavy metals based on divided 11 reaches was analyzed.The results showed that：（1） The highest percentage of land-use types was farmland,and most concentrated in the middle of the Buerhatong River.Meadow,forest and wetland were less than farmland.（2） The variations of pH and content of heavy metals had certain regularity,showed close relation with the land-use patterns and distribution of urban residential areas.（3） 6 kinds of heavy metals existed in the whole river,and the content of them had larger range.The contents of 5 kinds of heavy metals were class level Ⅰ or class level Ⅱ except the content of mercury was higher than the national surface water class standard Ⅴ.
出处
《北华大学学报（自然科学版）》
CAS
2013年第3期336-340,共5页
Journal of Beihua University（Natural Science）
基金
科技基础性工作专项课题计划(2007FY110400)
国家自然科学基金项目(30170163)
