QUAL2K模型的生化需氧量指标研究

RESEARCH OF BIOCHEMICAL OXYGEN DEMAND INDEX BASED ON QUAL2K MODEL

QUAL2K模型是由美国环境保护署研制开发的一维河流水质模型,被广泛应用于北美、欧洲、亚洲等地的流域污染物总量控制和水质管理。由于国内与美国的水质评价指标不同,导致该模型在国内无法直接进行水质模拟与评价,如美国采用的生化水质指标是CBODu、CBODs和CBODf,而国内采用的是BOD5、CODCr和CODMn。为了促进该模型在国内的推广及应用,从有机物的生物氧化过程、生化需氧量的定义及其检测方法出发,对BOD5与CBODu两者之间的关系进行研究,推导出BOD5与CBODu的转换公式。

QUAL2K,the river and stream water quality model developed by Environment Protection Agency(EPA)in USA,is widely used in total pollutant control of watershed and management of water quality in North America,Europe,Asia and other places.However,since the difference of parameters to measure water quality between domestic and the United States,this model cannot be directly used to simulate and evaluate the water quality in China,e.g.While CBODu,CBODsand CBODfare used as water quality indexes in the United States,whereas BOD,CODCrand CODMnare commonly used in China.To stimulate the popularization and application of the QUAL2 K model,this paper analyzed the relationship between BOD5 and CBODubased on the biological oxidation of organic matter,definitions and detection method of BOD and finally the conversion formulas of BOD5 and CBODuwere deduced.