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研究了Tennant法的起源,比较了该法的起源地域与北京市的水文气象条件的异同;以拒马河为例,计算了张坊站生态基流量。通过分析张坊站具有代表性的45 a系列水文变化规律,对比Tennant法计算的生态基流量与丰、平、枯3个水平年的大小关系,初步评估其计算成果的水文学意义及合理性;通过计算实测大断面水位流量关系,调查断面处主要水生生物的生境,剖析计算成果的水力学和生态学意义;在此基础上,指出该法的局限性,提出改进建议。
The origin of Tennant law was studied, and the similarities and differences between the origin of the law and the hydro-meteorological conditions in Beijing were compared. Taking Juma River as an example, the ecological flow of Zhangfang station was calculated. By analyzing the representative 45-a series of hydrological changes in Zhangfang station, the paper compares the size of ecological base flow calculated by Tennant method with the abundance, flatness and dryness in three horizontal years and initially evaluates the hydrological significance and rationality of the calculated results . By calculating the relationship between measured water level and flow in large section, the habitat of major aquatic organisms in the section was investigated, and the hydraulic and ecological significance of calculation results were analyzed. On the basis of this, the limitations of this method were pointed out and suggestions for improvement were proposed.