WANG Yan-gui 1, LIU Xi 2, SHI Hong-ling 1

1. International Research and Training Center on Erosion and Sedimentation (IRTCES), Beijing 100048, China
2. Beijing Jiaotong University, Beijing 100044, China

Abstract: In order to analyze variation trends of water and sediment in the river effectively, the graphical analysis method and the statistical analysis method were analyzed and compared systematically in this paper, based on the existing research methods and using as case studies on the water and sediment changes in the Datong Station and the Yichang Station of the Yangtze River. It is suggested that the graphic analysis method and statistical analysis method should be combined to analyze the trend in river water and sediment. For the graphic analysis methods such as the process line method, the sliding average line method and the cumulative curve analysis, the first two methods mainly reflect the variation process of water and sediment trend, while the third one can analyze the long-term trend. For the statistical analysis methods such as the Mann-Kendall method, the linear trend regression test, the Spearman rank correlation test and the cumulative filter method, the Mann-Kendall method is used more widely because of its simplicity and effectiveness in the process analyzing the water and sediment status.

Key words: water and sediment amounts in the river, variation trend, graphic analysis method, statistical analysis method

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 12 No. 1, 2014)