Study On Characteristics Of River Ice In The Inner Mongolia Reach Of The Yellow River Based On Climate Change

The Yellow River basin climate influences by the Siberian and Mongolia cold air, is dry, cold and little rain or snow. The ice disasters have been happened in winter every year. It often happens in Ningxia, Inner Mongolia, Shangdong and Henan. In recently, this problem has relieved as the Xiao Langdi engineering in Shangdong and Henan. But the problem is still very terrible in Ningxia and Inner Mongolia. Under the background of global warming, the climate characteristic has also changed, which makes ice characteristics change in Inner Mongolia section.In this paper, by the one year field work, it expounds river ice process in different places such as curve, shallow, hydraulic structures and straight channel. It uses money-Kendall test and multiple linear regression methods to analyze the 1959～2013 winter temperatures in the Yellow River section in Inner Mongolia and divided into three periods according to the data results and human factors. Meanwhile, it analyzes the flow ice date, freeze-up date and ice thickness in different time. Lastly, it uses C-day method to simulate the ice growth process. The result will show that climate change impact the ice growth process.The result shows there is a climate mutation from 1959 to 2013 in Inner Mongolia section, it is in 1987. It was divided into three periods, base period, before mutations period and after mutations period, according to the data results and human factors. Due to the increase runoff, the freeze date has become later in BaYanGaoLe station and SanHuHeKou station during before mutations period. The basic reason is slower temperature down rate for later freeze-up date. Using the C-day method to simulate the ice growth in the before mutations period or the after mutations period. The result shows the ice growth highest in the after mutations period earlier than the before mutations period and will last long time into the weakened.