The relationship between ENSO cycle and high and low-flow in the upper Yellow River

被引:0
|
作者
LAN Yongchao 1
2. Lanzhou Administrative Office of Hydrology and Water Resources of the Upper Reaches of the Yellow River
机构
基金
中国国家自然科学基金;
关键词
El Nino event; La Nina event; the upper Yellow River; high-flow and low-flow;
D O I
暂无
中图分类号
P461.2 [];
学科分类号
0706 ; 070601 ;
摘要
Firstly, the hydrological and meteorological features of the upper reaches of the Yellow River above Tangnag are analyzed based on observation data, and effects of EI Nino and La Ni na events on the high and low flow in the upper Yellow River are discussed. The results show El Nino and La Nina events possess consanguineous relationship wi th runoff in the upper Yellow River. As a whole, the probability of low fl ow occurrence in the upper Yellow River is relatively great along wit h the occurrence of El Nino event. Moreover, the flood in the upper Yellow River occurs frequently with the occurrence of La Nina event. Besides, the results also show dissimilarity of El Nino event occurri ng time exerts greater impact on high flow and low flow in the uppe r Yellow River, that is, the probability of drought will be greater in the sam e year if El Nino event occurs in spring, the high-flow may happen in this y ear if El Nino occurs in summer or autumn; the longer the continuous period of El Nino is, the lower the runoff in the upper Yellow River is.
引用
收藏
页码:103 / 109
页数:7
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