[1]LIU Wei,JIAO Shulin,LI Yinjiu,et al.Spatial and Temporal Distribution Characteristics of Precipitation of Different Geomorphic Types in Guizhou Province from 1960 to 2019[J].Research of Soil and Water Conservation,2021,28(05):159-171.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 05
Page number:
159-171
Column:
Public date:
2021-08-20
- Title:
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Spatial and Temporal Distribution Characteristics of Precipitation of Different Geomorphic Types in Guizhou Province from 1960 to 2019
- Author(s):
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LIU Wei,JIAO Shulin,LI Yinjiu,MO Yueshuang,ZHANG Jie,SHAO Yuxiao,FENG Yelin
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(College of Geography and Environmental Science,Guizhou Normal University,Guiyang 550025,China)
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- Keywords:
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precipitation change; geomorphic type; M-K inspection; wavelet analysis; Guizhou Province
- CLC:
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P426.61+4
- DOI:
-
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- Abstract:
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In order to understand the temporal and spatial changes of precipitation in the province and different geomorphic areas,and to provide reference for vegetation restoration and flood and drought disaster prevention and control,based on the daily precipitation data of Guizhou Province from 1960 to 2019,Combined with climate tendency rate and cumulative anomaly method,the temporal and spatial characteristics of precipitation change in different geomorphic types were analyzed,and the periodicity and mutation were tested by wavelet analysis and M-K method. The results show that:(1)the annual precipitation decreases at the rate of -9.25 mm/10 a(p>0.1); There was no significant decrease in spring and autumn,and no significant increase in summer and winter.(2)the annual precipitation in the six geomorphic areas showed a decreasing trend; Among them,the peak cluster depression type geomorphic area was dominated by dissolution,with the most precipitation(1 237.9 mm/a)and a significant decline rate of -19.30 mm/10 a(p>0.01); The annual precipitation in Karst low and middle mountain type,peak forest valley type and erosion denudation mixed type geomorphic areas with strong dissolution and erosion has no significant downward trend.(3)the precipitation in four seasons has obvious periodic oscillation; The first main period was 28 years; The second main period was 18 years except 15 years in summer. In addition,the time of abrupt change of precipitation in spring and autumn was 1984,and that in summer was 2014,but there was no abrupt change of precipitation in winter; Therefore,the decrease of precipitation in recent 60 years in Guizhou Province was mainly caused by the decrease of precipitation in spring and autumn,and the decrease was most significant in the peak cluster depression geomorphic area. In the future,we should pay attention to the vegetation restoration in the low-lying landform area,so as to conserve water resources,reduce soil erosion and adjust the climate.