基于改进Tennant法的洋河流域生态基流估算研究  

The Research of Ecological Basis Flow for Yanghe River Based on Improved Tennant Method

作　　者：刘存[1] LIU Cun(College of Conservancy and Hydropower, Hebei University of Engineering, Handan 056038, Hebei, Chin)

机构地区：[1]河北工程大学水利水电学院,河北邯郸056038

出　　处：《水利科技与经济》2017年第5期8-12,共5页Water Conservancy Science and Technology and Economy

摘　　要：针对我国北方河流的特点,将传统Tennant法的计算时段重新划分为丰水期、平水期和枯水期(冰冻期或冰封期),并对生态基流所占比例进行调整。把洋河作为研究区域,分别用传统方法和改进之后的Tennant法计算了各情景下的生态基流量及年总需水量。结果表明,改进之后的方法更接近实际,能充分反映生态基流需求随季节的变化,符合洋河水文情势的特点。以2014年为评价年进行分析,结果显示评价年来水量为0.83×10~8m^3,仅占多年平均流量的17.7%,不能满足洋河生态用水需求。而为使洋河的河流生态系统逐步恢复,达到"好"的状态,目前生态缺水量约为0.58×10~8m^3。According to the characteristics of the northern rivers in China, the calculation period of the traditional Tennant method is re - divided into the wet period, the plain water period and the dry season （freezing period or ice period）, and the proportion of the ecological base flow is adjusted. The results show that the ecological basis flow and the total annual water demand are calculated by the traditional method and the improved Tennant method. The results show that the improved method is closer to reality and can reflect the ecological base flow demand and in line with the characteristics of Yanghe hydrological situation. The results show that the annual water supply is 80. 3 million m3, accounting for only 17.7% of the average annual flow, and cannot meet the ecological water de- mand of Yanghe. And in order to make the fiver fiver ecosystem gradually restored, to ＂ good＂ state, the current ecological water shortage of about 58 million m3.

关 键 词：改进Tennant法 洋河 生态基流 

分 类 号：X171.1[环境科学与工程—环境科学]