Complexity analysis of precipitation in changing environment in Chien River Basin,China  

作　　者：Qing-hua LUAN Hao WANG Da-zhong XIA 

机构地区：[1]College of Water Conservancy and Hydropower, Hebei University of Engineering, Handan 056021, P. R. China [2]Department of Water Resources, China htstitute of Water Resources and Hydropower Research, Beijing 100038, P. R. China [3]College of Hydrology and Water Resources, Hohai University, Nanjing 210098, P. R. China

出　　处：《Water Science and Engineering》2011年第2期133-142,共10页水科学与水工程（英文版）

基　　金：supported by the National Basic Research Program of China (the 973 Program,Grant No.2010CB951102);the National Natural Science Foundation of China (Grant No. 51021006)

摘　　要：The hydrological processes influenced by the multiple factors of climate, geography, vegetation, and human activities are becoming more and more complex, which is an important characteristic of hydrological systems. The different complexity distributions of precipitation processes of the Chien River Basin （a sub-basin of the Minjiang Basin） in two periods （from 1952 to 1980, and from 1981 to 2009） are illustrated using the fractal based on the continuous wavelet transform （CWT）. The results show that （1） at the basin scale the precipitation process in the latter period is more complex than in the former period; （2） the maximum value of the complexity distribution moved from the east to the middle; and （3） through analysis of the time-information and space-information concealed in this complexity change, the precipitation characteristics in the changing environment in the basin can be illuminated. This study could provide a reference for research on disaster pre-warning in changing environments and for integrated water resources management in the local basin.The hydrological processes influenced by the multiple factors of climate, geography, vegetation, and human activities are becoming more and more complex, which is an important characteristic of hydrological systems. The different complexity distributions of precipitation processes of the Chien River Basin （a sub-basin of the Minjiang Basin） in two periods （from 1952 to 1980, and from 1981 to 2009） are illustrated using the fractal based on the continuous wavelet transform （CWT）. The results show that （1） at the basin scale the precipitation process in the latter period is more complex than in the former period; （2） the maximum value of the complexity distribution moved from the east to the middle; and （3） through analysis of the time-information and space-information concealed in this complexity change, the precipitation characteristics in the changing environment in the basin can be illuminated. This study could provide a reference for research on disaster pre-warning in changing environments and for integrated water resources management in the local basin.

关 键 词：characteristic analysis precipitation complexity continuous wavelet transform fractal： Chien River Basin 

分 类 号：P458.121[天文地球—大气科学及气象学] O157[理学—数学]