| 康燕霞,齐广平,殷长琛,贾涪钧.甘肃省参考作物蒸散量及影响因素的时空分异特征[J].干旱地区农业研究,2015,33(5):154~162 |
| 甘肃省参考作物蒸散量及影响因素的时空分异特征 |
| Time-spatial differential features of reference evapotranspiration and its influencing factors in Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2015.05.28 |
| 中文关键词: 参考作物蒸散量 成因分析 云模型 通径分析 指标敏感性分析 |
| 英文关键词:reference evapotranspiration(ET0) causes analysis cloud model Path analysis sensitivity analysis of indicators |
| 基金项目:国家自然基金项目（51409048）；水利部公益性行业科研专项项目（201301040）；农业行业专项项目（201403048-8）；甘肃农业大学工学院青年教师科技创新基金项目（GXY2013-05） |
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| 中文摘要: |
| 为了探寻甘肃省参考作物蒸散量（ET0）的变化特征及其影响因子，利用甘肃省29个气象测站1951—2013年的观测资料，采用FAO-Penman-Monteith(98)公式计算甘肃省不同区域的ET0，并依靠线性趋势方程、云模型、通径分析和指标敏感性分析方法对ET0时空分异特征和影响因子进行分析。结果表明：甘肃省ET0以2.11 mm·10a-1的倾向率呈现出增长趋势，除河西地区以0.71 mm·10a-1的倾向率呈递减趋势外，其余三个地区均呈增长状态。ET0空间分布总体上呈现为西北地区大于东南地区，河西地区最为离散、不稳定，陇东地区最为均匀、稳定。ET0的主要影响因子具有空间变异性，河西和陇南地区为平均温度，陇中和陇东地区为平均相对湿度和日照时数。但是ET0的变化是多因素共同影响的结果，平均风速是河西地区和陇东地区的另一主要影响因素，陇中地区为平均相对湿度，陇南为日照时数。 |
| 英文摘要: |
| In order to explore the changing characteristics and its influence factors for the reference evapotranspiration (ET0) in Gansu Province, using the observed data during 1951—2013 from 29 meteorological stations in Guansu Province, adopted the FAO-Penman-Monteith formula to calculate the ET0 in different regions, also analyzed the temporal-spatial differential feature of ET0 depended on the linear trend equation, cloud mode, Path analysis and sensitivity analysis of indicators methods. The results showed that: The ET0 in Guansu Province was appeared an increasing tendency by the inclination rate of 2.11 mm·10a-1. Except Hexi region was appeared a decrease tendency by the inclination rate of 0.71 mm·10a-1. Other three regions were total appeared an increasing tendency. In general the spatial distribution of ET0 was presented the northwest area large than the southeast area, the Hexi region was the most discrete and instability, the Longdong region was the best homogeneity and stability. The main influence factors for ET0 were possessed the spatial variability. In Hexi and Longnan region was the average temperature, and in Longzhong and Longdong region was the average relative humidity and sunshine hours. However, the variety of ET0 was the result by many factors, the mean wind speed was the other main influence factor in Hexi and Longdong regions, and the mean relative humidity was in Longzhong region, and the sunshine hours was in Longnan region. |
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