[1]LIU Yinge,BAO Jiangchuan,YANG Yuxin,et al.Temporal and Spatial Characteristics of Precipitation and Evaporation in the Weihe River Basin from 1850 to 2005[J].Research of Soil and Water Conservation,2022,29(06):224-232.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 06
Page number:
224-232
Column:
Public date:
2022-10-20
- Title:
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Temporal and Spatial Characteristics of Precipitation and Evaporation in the Weihe River Basin from 1850 to 2005
- Author(s):
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LIU Yinge1,2, BAO Jiangchuan1, YANG Yuxin1, HUANG Xue1
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(1.School of Geography and Environment, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, China; 2.Shaanxi Provincial Key Laboratory of Disaster Monitoring and Mechanism Simulation, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, China)
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- Keywords:
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precipitation; evaporation and temperature; CMIP5 model data; Weihe River Basin
- CLC:
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P412; P467
- DOI:
-
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- Abstract:
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In order to explore past climate change law and its influencing factors in the Weihe River Basin, based on the output products of the CMIP5 model, the hyperbolic interpolation method was used to obtain the precipitation, evaporation and temperature data of 56 stations in the Weihe River Basin from 1850 to 2005. Multi-scale temporal and spatial characteristics of climate elements in the Weihe River Basin were analysed by the least square method, M-K mutation test, wavelet analysis and ArcGIS spatial interpolation method. The results show that the average annual temperature and precipitation in the Weihe River Basin have been increasing for the past 156 years, with trend rates of 0.028℃/10 a and 0.09 mm/10 a, respectively. The annual evaporation is on a decreasing trend, with a trend rate of -5.1 mm/10 a, the seasonal changes of temperature and precipitation are basically consistent with the annual changes, and the decrease in evaporation mainly occurs in summer and autumn. In the middle reaches of the Weihe River basin, the trend of relative precipitation variability in the lower reaches is basically the same as that in the south, while the trend of relative precipitation variability in the upper reaches is the same as that of the Jinghe and Luohe tributaries. The relative variability is between -2.8% and 14.98%. The relative change rate of the temperature and evaporation in the entire basin is -2.3%~-3.47% and -2.35%~6.54%. All climatic elements have short-period changes of 5~20 a and long-period changes of 110 a. The temperature and evaporation had abrupt changes in 1963 and 1986, respectively, and there is no abrupt change in precipitation. In general, the climate of the Weihe River Basin has shown a trend of warming and humidification in the past 156 years, and there are obvious spatial differences and periodic regularities in precipitation and evaporation.