摘要
为了拓宽年内展布计算法的适用范围,针对我国北方河道季节性明显的特点,对该方法进行改进。在原方法的基础上,将同期均值比修改为特枯年(P=90%)河道年径流量与多年平均径流量的比值,结合多年月均径流量进行河道内基本生态需水量计算。以弥河谭家坊水文断面为例,计算河道内基本生态需水量,并与Tennant法标准及我国常用的水文学方法以及改进前的年内展布计算法作对比。结果表明,在一般用水期和鱼类产卵育幼期,改进的年内展布计算法结果都能够满足维持河道基本生态功能的要求,更为合理,证实该方法既继承了原方法能够体现河道年内径流总体过程和变化特征的特点,又能够适用于季节性明显的河道,适用于河道内基本生态需水量的计算。
In order to broaden the applicability of the dynamic calculation method,we improved the method in view of the obvious seasonality of northern rivers in China.On the basis of the original method,we substituted the percent of the average flow in the same periods with the ratio of the annual runoff in extreme drought years （ P =90%） to the multi-year average runoff,and used the multi-year average monthly runoff for calculation of the instream basic ecological water demand.Taking the hydrological section of Tanjiafang as a case study,we calculated the basic ecological water demand in the river and compared the method with the Tennant method and other methods.The results showed that the calculation results of the improved method were reasonable and could meet the requirement of maintaining the basic ecological function of the river in the general water using period and the spawning and nursing period.This method has inherited the strengths of the original method in showing the overall runoff process and the changing characteristics of the river course during a year.It can be applied to rivers with obvious seasonality.This method is suitable for the calculation of instream basic ecological water demand.
作者
赵然杭
彭弢
王好芳
高峰
齐真
ZHAO Ranhang;PENG Tao;WANG Haofang;GAO Feng;QI Zhen(School of Civil Engineering,Shandong University,Jinan 250061,China;Water Resources Research Institute of Shandong Province,Jinan 250013,China)
出处
《南水北调与水利科技》
CSCD
北大核心
2018年第4期114-119,共6页
South-to-North Water Transfers and Water Science & Technology
基金
"十二五"国家科技支撑计划项目(2015BAB07B02)
山东省重大水利科研与技术推广专项资助项目(SDSLKY201501
SDSLKY201222)~~
关键词
年内展布计算法
改进
基本生态需水量
河道内
弥河
dynamic calculation method
improvement
basic ecological water demand
instream
Mi River
