摘要
黄河下游河川年径流量有逐年减少的趋势 ,花园口站 90年代实测年径流量为 80年代的65.1 % ,这与上中游年降水量减少、用水量增加有关。河川年最大流量逐年减少 ,花园口站 90年代平均最大流量为 80年代的 68.6% ,并出现了“小流量、高水位、大漫滩”的发展态势。河川小流量或断流日趋严重 ,利津站 90年代累计断流天数为 80年代的 8.2倍 ,文中分析了缓解其影响的可行对策。
The annual runoff at the lower reaches of the Huanghe River appears a decline tendency year by year, which is related to annual drop of precipitation and rise of water consumption at the upper middle reaches of the river. The ratio of the measured annual runoff between the 1990s and the 1980s was 65 1% at Huayuankou Station. The annual maximum discharge in the river also shows an annual reducing tendency and the situation of higher water level accompanied with smaller discharge but bigger flood threat has occurred. The ratio of the average maximum discharge between the 1990s and the 1980s was 68 6% at Huayuankou Station. The small discharge or absence of flow in the river shows an annual increasing tendency, in which the ratio of the cumulative days with absence of flow in the 1990s to that in the 1980s was 8 2 to 1 at Lijin Station. The feasible countermeasures for reducing the effects of absence of flow in the river were analyzed in this paper.
出处
《地理研究》
CSCD
北大核心
2000年第4期377-382,共6页
Geographical Research
基金
中国科学院重大资助项目!(KZ951 - A1 - 30 1
KZ95T- 0 4 - 0 1 )
国家自然科学基金重大资助项目!(49890 330 )
国家科技攻关资助
关键词
黄河下游
对策
河川
年径流量
断流
变化趋势
lower reaches of the Huanghe River
runoff
tendency
countermeasures
