The influence of river ice on spring runoff in the Lena river, Siberia

Authors: Ma, Xieyao; Yasunari, Tetsuzo; Ohata, Tetsuo; Fukushima, Yoshihiro

Source: Annals of Glaciology, Volume 40, Number 1, January 2005 , pp. 123-127(5)

Publisher: International Glaciological Society

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Abstract:

The Lena river is one of the four largest rivers flowing into the Arctic Ocean. It has a complicated hydrological system that is affected not only by the amount of precipitation but also by the timing of ice break-up. To determine the mechanisms of runoff formation, a numerical analysis based on modeling was carried out for the period 1986-2000. The results show that (1) the timing of flood rise and peak can be modeled at Tabaga, which represents the upper and central portions of the Lena river; (2) river-freeze processes delay the spring, snowmelt-dominated flood by about 23 days; and (3) the difference between the break-up dates at Tabaga and Kirensk has ranged from several days to >2 months, and a maximum value of 69 days was recorded in spring 1998.

Document Type: Research article

DOI: 10.3189/172756405781813744

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