2007•Bulletin of Soil and Water ConservationRequires access

Decennial Evolvement of Abnormal Rainfall During Flood Season over the Loess Plateau

Yirong Wang, Xudong Zhang

Abstract

The decennial evolvement of abnormal rainfall in flood season over the Loess Plateau of China were studied using the rainfall data of the recent 40 years.Results showed that the range of abnormal rainfall de- creased in flood season.The rainfall belt significantly shifted to the south with 1.8 lat.degrees from 1960s to 1990s and 0.6 lat.degrees from 1960s to 1980s.Each of the first 3 models of rainfall had different change points and periods,but multiple periods and weak surges corresponded with rainy time,being contrary to the time of rain shortage.The region sensitive to abnormal rainfall flowed from northeast to southwest.The west part of the Loess Plateau tended to be arid.

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Key concepts: Loess plateau, Flood myth, Arid, Plateau (mathematics), Loess, Wet season, Environmental science, Precipitation