[1]GAN Rong,LI Dandan,YANG Feng,et al.Spatiotemporal Variation of Precipitation in Upper Upstream of Chushandian Reservoir from 1952 to 2017[J].Research of Soil and Water Conservation,2022,29(04):150-158.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 04
Page number:
150-158
Column:
Public date:
2022-06-20
- Title:
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Spatiotemporal Variation of Precipitation in Upper Upstream of Chushandian Reservoir from 1952 to 2017
- Author(s):
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GAN Rong1,2, LI Dandan1,2, YANG Feng3, ZUO Qiting1,2
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(1.School of Water Conservancy Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; 2.Henan Key Laboratory of Groundwater Pollution Prevention and Remediation, Zhengzhou 450001, China; 3.Administration of Reservoir Construction of Chushandian Reservoir, Xinyang, Henan 464043, China)
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- Keywords:
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precipitation; spatiotemporal variation; Mann-Kendall; Morlet wavelet; inverse distance weighted(IDW)interpolation; upstream of Chushandian Reservoir
- CLC:
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P426.6
- DOI:
-
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- Abstract:
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In order to investigate the spatial and temporal characteristics of precipitation in the upper watershed of the Chushandian Reservoir over the past 65 years, based on the daily precipitation data of 13 rainfall stations in the upper upstream of Chushandian reservoir from 1952 to 2017, the interannual variation, periodicity and spatial distribution characteristics of precipitation were studied by using climate tendency rate method, Mann Kendall trend test, Morlet wavelet analysis and inverse distance weight(IDW)interpolation method. The results show that:(1)from 1952 to 2017, the annual average precipitation was 1 028.3 mm, and the climate tendency rate of annual precipitation was -20 mm/decade(p<0.05), which showed a significant downward trend; from the seasonal point of view, the precipitation in spring, summer and winter showed a decreasing trend with time, and the precipitation in autumn showed an increasing trend;(2)the annual precipitation was higher in the south and lower in the north, while the trend of precipitation tendency rate was opposite;(3)the change of precipitation in the basin presented the first main cycle of about 20 years, and the periodic change of the basin also had some spatial distribution characteristics. In the past 65 years, the precipitation in the upstream of Chushandian reservoir showed a significant downward trend, and the difference of time and space was obvious, the trend of annual precipitation in upstream of Chunshandian Reservoir had been increasing and then decreasing, with a significant downward trend throughout the time domain, and annual precipitation showed a cyclical change of about 20 years.