Characteristics analysis of temporal-spatial potential evapotranspiration distribution in Huaibei plain based on cloud model
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Abstract:
Traditional methods can only describe the average case of ET0 temporal and spatial distribution, but it is difficult for their degree of dispersion and stability were quantified. According to the meteorological data and geographic information of 5 stations in Anhui Huaibei Plain, using Penman-Monteith to calculate ET0, its temporal and spatial distribution characteristics was analyzed based on cloud model. The results showed that: Inter-annual ET0 was provided with a decrease tendency, ET0 in spring and winter were provided with a growing tendency, and in summer and autumn with a decrease trend; inter-annual ET0 was more uniform in spatial distribution and seasonal ET0 uneven; ET0 was more fragmented and unstable in 2004, and relatively concentrated and stable in 1956; ET0 was more fragmented and unstable in Fuyang station, and relatively concentrated and stable in Suxian station; the degree of dispersion of ET0 in temporal variation was smaller than in spatial distribution, and stability was similar. Therefore, analysis on characteristics of ET0 in temporal-spatial distribution in Huaibei Plain based on cloud model is feasible and effective, and the characteristics of ET0 in temporal-spatial distribution can be analyzed visually. The research results can provide scientific reference for evapotranspiration of various crop as well as drought and irrigation research.
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