近年来漓江水资源短缺问题给流域社会经济发展带来严重阻碍, 对生态需水量的研究有利于该区域水资源的 可持续利用。选择了月保证率法计算生态需水量, 但由于漓江流域降雨量季节性分布不均匀, 径流量的年内和年际 变化都比较大, 因此对月保证率法进行了改进, 最终得到50%保证率下需水等级为/ 好0 时的生态需水量为适宜生 态需水量, 结果为181 45 亿m3 , 最小生态需水量为51 88 亿m3 。最后用Tennant 法对结果进行检验, 并分析了产生 误差的原因。

The scar city problem of wat er resources in the Lijiang River Basin has hinder ed the sustainable social and eco nomic de2 v elo pment in recent years, and r esear ch on the eco log ical w ater requir ement benefits the sustainable dev elopment of w ater re2 sour ces in this area. In this paper, the mo nt hly g uaranteed r ate met ho d w as used to calculate the eco lo gical w ater r equirement. However , precipit at ion in the Lijiang River Basin show s unevenly seasonal distributio n, and the annual and interannual r unoff values var y significantly. T her efor e, the mo nthly guaranteed rate method w as modified in this paper. The r esults showed that the eco log ical water requirement is abo ut 1. 845 billion cubic meters w hen the g uar anteed r ate is 50% and the w ater requirement level is / g oo d0 , and the minimum ecolog ical w ater r equirement is 5. 88 billio n cubic meter s. Finally, t he r esults w ere v erif ied u2 sing the T ennant met ho d and t he causes of er ro rs w ere analyzed.

广西科技厅项目/ 漓江流域上游河床仿真调度与防汛抗旱预报模型研究0 ( 桂科攻0816006210) ; 广西科学研究与技术开发计划 项目/ 变化环境下的水文频率计算与研究2以漓江上游流域区为例0 ( 桂科能081Z004)