| 引用本文: | 孙洁,王强民,刘基.鄂尔多斯高原西部潜在蒸散发量变化规律研究——以鄂托克旗为例[J].灌溉排水学报,2018,37(11):84-90. |
| SUN Jie,WANG Qiangmin,LIU Ji.鄂尔多斯高原西部潜在蒸散发量变化规律研究——以鄂托克旗为例[J].灌溉排水学报,2018,37(11):84-90. |
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| 摘要: |
| 【目的】揭示鄂尔多斯高原西部潜在蒸散发量的变化规律。【方法】根据研究区1957—2013年逐日的气象资料，应用Penman-Monteith公式计算潜在蒸散发量，采用Mann-Kendall突变检验、累积距平曲线、Morlet小波分析法、偏相关分析及贡献率计算等方法对研究区潜在蒸散发量特征进行了分析。【结果】①研究区潜在蒸散发量总体呈下降趋势，下降幅度为1.51 mm/a；②M-K突变检验表明，年际潜在蒸散发量在1992年发生了突变，夏季突变点在1991年，其他季节突变点不明显；③潜在蒸散发存在28~29 a和9~10 a的主震荡周期。【结论】风速的下降是潜在蒸散发量减小的主要因素；同时，日照时间的减小和降水量的增加也是鄂尔多斯高原西部潜在蒸散发量减小的关键因素。 |
| 关键词: 鄂尔多斯高原西部； Penman-Monteith公式； 潜在蒸散发量； 回归分析 |
| DOI：10.13522/j.cnki.ggps.2017.0662 |
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| Change of the Potential Evapotranspiration in Western Ordos Plateau: Taking Etoke County as an Example |
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SUN Jie, WANG Qiangmin, LIU Ji
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1. Xi’an Research Institute of China Coal Technology & Engineering Group Corp, Xi’an 710054, China;2. Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology in Shaanxi Province, Xi’an 710054, China;3. China Coal Research Institute, Beijing 100013, China
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| Abstract: |
| 【Objective】Potential evapotranspiration is an important parameter in water resource management, and in this paper, we calculated its change in Western Ordos Plateau by taking Etoke County as an example. 【Method】The potential evapotranspiration was calculated by the FAO Penmen-Monteith equation using the meteorological date measured from 1957 to 2013 in the region. The variation of the calculated potential evapotranspiration was analyzed using the Mann-Kendall curve, cumulative departure curve, Morlet wavelet analysis, regression analysis and the contribution rate calculation. 【Result】The potential evapotranspiration in the studied area had been decline from 1957 to 2013 at 1.51 mm/per annum, with abrupt changes in 1992 for annual average and in 1991 for summer average. Its variation in spring, autumn and winter was relatively smooth. We identified two periods for the potential evapotranspiration, one was 28 to 29 years and the other one was 9 to 10 years. The prediction showed that potential evapotranspiration is to increase from 2013 to 2022．【Conclusion】 The decrease in wind speed is the main factor driving the potential evapotranspiration in the study area to decline. The decreases in sunshine duration and precipitation also play an role in reducing the potential evapotranspiration in this region. |
| Key words: Western Ordos Plateau; Penman-Monteith equation; potential evapotranspiration; regression analysis |
