[1]MENG Qing,GAO Xiang,BAI Hongying,et al.Temporal and Spatial Variations and Trends of Extreme Precipitation in Qinling Mountains During the Period 1960-2015[J].Research of Soil and Water Conservation,2019,26(06):171-178,183.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 06
Page number:
171-178,183
Column:
Public date:
2019-10-17
- Title:
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Temporal and Spatial Variations and Trends of Extreme Precipitation in Qinling Mountains During the Period 1960-2015
- Author(s):
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MENG Qing1,2, GAO Xiang3, BAI Hongying1,2, ZHANG Yang1,2, WANG Huiyuan1,2
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1. College of Urban and Environmental Science, Northwest University, Xi’an 710127, China;
2. Shaanxi Key Laboratory of Surface System and Environmental Carrying Capacity, Northwest University 710127, China;
3. China Meteorological Administration Public Meteorological Service Centre, Beijing 100081, China
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- Keywords:
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climate shift; Qinling Mountains; extreme precipitation; spatiotemporal variation
- CLC:
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P426
- DOI:
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- Abstract:
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Extreme precipitation is one of the important research topics of climate change. Under the background of global climate change, study on the extreme precipitation variation in Qinling Mountains is of great significance for clarifying regional extreme climate difference and exploring its mechanism. Based on the precipitation data of 29 meteorological stations in Qinling Mountains from 1960 to 2015 and the DEM data set with the resolution of 25 m×25 m, six extreme precipitation indices were selected to study the spatial and temporal variation characteristics of extreme precipitation in Qinling Mountains in the past 56 years by using least square regression, Man-Kendall mutation test and 5-year sliding trend method and kriging interpolation method. The conclusions were as follows. (1) There were obvious spatial differences in the distribution of extreme precipitation in Qinling Mountains. The northwest part was the high value area of consecutive dry day (CDD), and the central and western parts were the high value areas of consecutive wet day (CWD). The distribution pattern of number of heavy precipitation days (R10), very wet days(R95p), max 5-day precipitation amount (RX5day) and simple daily intensity index (SDⅡ) were high in the south and low in the north. Ziyang County, which is located at the southernmost end of Qinling Mountains, has the maximum value of all extreme precipitation indices. (2) In the past 56 years, the persistence of extreme precipitation in Qinling Mountains has decreased and the intensity has increased as a whole. Precipitation in Qinling Mountains was short and intense, especially in the southern aspect of Qinling Mountains. Relevant departments should strengthen their preparedness so as not to cause major damage caused by flood disasters.