Research on Runoff Variation in Yellow River Headwater Area under Climate Change
Due to comprehensive impact from climate change and other factors.,the water resource quantity of Yellow River valley in recent years has dropped sharply,and the event of cutout of Yellow River resource and downstream happened occasionally.The climate change causes change of a series of hydrographic circulation elements,like rainfall,evapotranspiration,river flow,subsurface flow and the like so as to further change the current status of the global hydrographic circulation to cause redistribution of water resource in space and time.Therefore,taking the Yellow River headwater area with fragile ecological environment as the research object and adopting wavelet analysis method to analyze temperature variation and runoff variation characteristics in the Yellow River headwater area may provide help for constantly improving the ecological environment of the Yellow River headwater area.The research has made main achievements as follows:①)taking analysis on the climate change characteristics of the Yellow River headwater area in recent 50 years,and result: the temperature of the Yellow River headwater area wilt increase constantly in the next few years; ②)in accordance with annual average flow time series of Tangnaihe station (1959 ~ 2009),after adopting the wavelet analysis method to analyze the periodic variation of time series,finding that variation of two periods,14 ~ 16years and 9 ~ 12 years is the most distinguishable; and then the variation of the period of3 ~6.15 years is defined as the flrst period of runoff variation by calculating wavelet variance of runoff time series.
the Yellow River headwater area climate change runoff
Liu Meng Cai Ming Qiao Mingye
Yellow River Engineering Consulting Co., Ltd., Zhengzhou, 45003, China
国际会议
The 5th International Yellow River Forum (第五届黄河国际论坛)
郑州
英文
85-90
2012-09-24（万方平台首次上网日期，不代表论文的发表时间）