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在分析河南省不同经纬度的9个县市(安阳、三门峡、郑州、卢氏、西华、南阳、驻马店、信阳和固始)1961～2002年的气象数据的基础上,对参考作物腾发量旬值的变化特征进行分析,并用时间序列法建立了相应的随机模拟模型。结果表明:各地区ET0的变化呈非增加趋势,周期项可用6阶傅里叶基数很好地描述,随机项可建立AR或者ARMA模型进行描述。本研究为河南省的各个地区的农田灌溉工作提供科学的依据。
Based on the analysis of meteorological data from 1961 to 2002 in 9 counties (Anyang, Sanmenxia, Zhengzhou, Lushi, Xihua, Nanyang, Zhumadian, Xinyang and Gushi) of different latitudes and longitudes in Henan Province, the reference crop evapotranspiration Ten-year changes in the value of the characteristics of analysis and time series method to establish a corresponding stochastic simulation model. The results show that the ET0 changes in all regions show a non-increasing trend, and the periodic terms can be well described by the sixth-order Fourier base. AR or ARMA models can be established for random item description. This study provides a scientific basis for farmland irrigation in various regions of Henan Province.