| 引用本文: | 谭秀翠,王 刚,刁艳芳,等.山东省参照作物腾发量时空变异分布特征[J].灌溉排水学报,2018,37(3):103-109. |
| TAN Xiucui,WANG Gang,DIAO Yanfang,et al.山东省参照作物腾发量时空变异分布特征[J].灌溉排水学报,2018,37(3):103-109. |
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| 摘要: |
| 【目的】分析山东省参照作物腾发量（ET0）的时空分布规律及影响因素。【方法】采用FAO-56 Penman-Monteith方程计算山东省24个气象站点的逐日ET0，通过统计分析和Arc GIS中反距离权重插值法，定量和定性分析了ET0的时空分布特征。【结果】1961—2011年山东省平均ET0为1 161 mm，呈减小趋势，分布差异主要受空气动力因素影响；年内分布集中，5、6月ET0最大，占全年的27%，5—9月受温度、湿度影响显著，10—次年4月受日照时间、风速影响显著。空间上，ET0从西北到东南呈减小的趋势，内陆主要受温度、日照时间影响，东南沿海主要受湿度、风速影响，ET0空间分布与湿度显著负相关，采用湿度估算ET0，平均相对误差为2%。【结论】山东省ET0空间分布的主控因子是湿度。 |
| 关键词: 参照作物腾发量； 山东省； 时空分布； 相关分析； 反距离权重 |
| DOI：10.13522/j.cnki.ggps.2017.0271 |
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| Temporal and Spatial Distribution Characteristics of Reference Crop Evapotranspiration in Shandong Province |
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TAN Xiucui, WANG Gang, DIAO Yanfang, DONG Jie
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Shandong Agricultural University, Taian 271000, China
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| Abstract: |
| 【Objective】 Analyze the temporal and spatial characteristics and influencing factors of ET0 in Shandong Province. 【Method】 Daily climatic data in 24 meteorological stations were used to calculate ET0 by FAO-56 Penman-Monteith equation. In addition, statistical analysis and inverse distance weighted interpolation of ArcGIS were applied to quantitative analysis and qualitative analysis of the spatial-temporal characteristics of ET0. 【Result】 Over 1961—2011, the average ET0 was 1 161 mm in Shandong province, which showed a decreasing trend and the distribution difference was mainly influenced by aerodynamic factors. Within the year, ET0 was concentrated, with the largest ET0 in May and June, accounting for 27% of the whole year. ET0 was significantly affected by temperature and humidity from May to September, yet sunshine hours and wind speed were the main influencing factors from October to April. In space, ET0 decreased from northwest to southeast. In northeast land, ET0 was mainly affected by temperature and sunshine time, while mainly affected by the humidity, wind speed along the southeast coast. In space, there was significantly negative correlation between ET0 and humidity. The average relative error of ET0 estimated by humidity was 2%. 【Conclusion】 By analyzing spatial characteristics of ET0, the main control factor was determined by the humidity. |
| Key words: reference crop evapotranspiration; Shandong Province; temporal and spatial distribution; correlation analysis; inverse distance weighted |
