[1]WANG Yalei,DONG Ye.Spatiotemporal Distribution of Potential Evapotranspiration and Its Main Meteorological Factors in Liaohe River Basin During Growing Season from 1968 to 2018[J].Research of Soil and Water Conservation,2021,28(06):162-167.
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Spatiotemporal Distribution of Potential Evapotranspiration and Its Main Meteorological Factors in Liaohe River Basin During Growing Season from 1968 to 2018
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 06
Page number:
162-167
Column:
Public date:
2021-10-10
- Title:
- Spatiotemporal Distribution of Potential Evapotranspiration and Its Main Meteorological Factors in Liaohe River Basin During Growing Season from 1968 to 2018
- CLC:
- P426.2
- DOI:
- -
- Abstract:
- In order to analyze the change of potential evapotranspiration and the main meteorological factors in the Liaohe River Basin，and provide references for promoting the rational use of agricultural water resources and agricultural production planning in the basin，based on the daily meteorological data of the 23 meteorological stations in the Liaohe River Basin from 1968 to 2018，we used Penman-Monteith formula to calculate the reference crop evapotranspiration in the Liaohe River Basin，used linear trend analysis，stepwise regression analysis，Kriging spatial interpolation analysis and path analysis to study the temporal and spatial characteristics of reference crop evapotranspiration and the main meteorological factors in the Liaohe River Basin. The results showed that:(1)the reference crop evapotranspiration in the growing season from 1968 to 2018 in the Liaohe River Basin showed a downward trend，at a rate of -0.303 mm/a; ET0 showed a downward trend in May，June and July，and the increased trends in August and September;(2)the spatial distribution of the reference crop evapotranspiration of growing season in the Liaohe River Basin was high in the middle，low in the surroundings，and higher in the west than in the east; the monthly ET0 spatial distribution was similar to the overall distribution;(3)the degree of influence of various meteorological factors on the reference crop evapotranspiration in the growing season in the Liaohe River Basin decreased in the order: sunshine duration>relative humidity>wind speed>minimum temperature > maximum temperature，and the main meteorological factor was sunshine duration. In general，the latent dispersion in the growing season of the Liaohe River Basin showed a downward trend from 1968 to 2018，and the sunshine duration was the dominant factor in the variation of the latent dispersion in this region.
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Last Update:
2021-10-10