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广西澄碧河水库下游河道年生态需水量的计算对比研究
引用本文:杜 懿,麻荣永.广西澄碧河水库下游河道年生态需水量的计算对比研究[J].水资源与水工程学报,2017,28(4):97-102.
作者姓名:杜 懿  麻荣永
作者单位:广西大学 土木建筑工程学院, 广西 南宁 530004
基金项目:国家自然科学基金项目(51369005)
摘    要:针对河道生态需水量的计算问题,以广西澄碧河水库下游河道为例,分别采用了3种不同的水文学计算方法进行了概算,并对传统Tennant法和月保证率法进行了适当改进。针对传统Tennant法的不足,对用水期进行了重新划分,同时引入修正系数对流量百分比进行了重新修正,使其更适用于河道的现实情况;此外对月保证率法的部分缺点也进行了两方面的改进,使其计算结果更加合理可靠。计算结果表明:3种方法均适用于该河道的生态需水量计算,在平水年(P=50%)情况下,利用改进的Tennant法和改进的月保证率法计算得到的河道适宜需水量分别为4.99×10~8m~3、3.80×10~8m~3。利用径流年内展布法得到的计算结果为3.17×10~8m~3,较以上两种方法偏小,但尚属合理范围之内,仍具有一定的推广使用意义。

关 键 词:生态需水量  Tennant法  月保证率法  年内展布法  澄碧河水库

Comparison research of annual ecological water demand of the downstream river of Guangxi Chengbihe Reservoir
DU Yi,MA Rongyong.Comparison research of annual ecological water demand of the downstream river of Guangxi Chengbihe Reservoir[J].Journal of water resources and water engineering,2017,28(4):97-102.
Authors:DU Yi  MA Rongyong
Abstract:In view of the calculation of ecological water demand in the river course, taking the downstream river channel of Chengbihe Reservoir in Guangxi as an example, three different hydrological calculation methods were used to estimate the ecological water demand, and the traditional Tennant method and the monthly guaranteed frequency method have been improved. Considering the shortcomings of the traditional Tennant method, the water use period is redivided, and the correction coefficient is introduced to revise the flow percentage to make it more suitable for the river. In addition, the monthly guaranteed frequency method has been improved in two aspects, so that the calculation results are more reasonable and reliable. The results show that the three methods all can be applied to the river ecological water requirement calculation. In normal years (P= 50 %), using the modified Tennant method and the improved monthly guaranteed frequency method to calculate the suitable water requirement of river, and the water demand are respectively 4.99×108 m3, 3.80×108 m3.In addition, by using the during the year distribution method we obtained results for 3.17×108 m3, which is relatively small compared to the above two methods, but within the reasonable limits, and still has some significance for extension use.
Keywords:ecological water demand  Tennant method  the monthly guaranteed  frequency method  during the year distribution method  Chengbihe Reservoir
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