Changing tendency of river runoff at lower reaches of the Huanghe River and countermeasures for reducing its effects
Changing tendency of river runoff at lower reaches of the Huanghe River and countermeasures for reducing its effects
复制标题
作者：
Tang Deng
黄河下游年径流量呈逐年减少趋势，这与黄河中上游年降水量减少、年耗水量增加有关。花园口站90 ~ 80年代实测年径流量的比值为65.1%。黄河年最大流量也呈现出逐年减少的趋势，出现了水位高、流量小、洪水威胁大的情况。花园口站90 ~ 80年代平均最大流量占比为68.6%。利津站小流量或无流量的累积日数呈逐年增加的趋势，其中90年代无流量累积日数与80年代无流量累积日数之比为8.2∶1。分析了减小河流缺流影响的可行对策。
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.