| Cite this article: | 张克峰,马波,张大龙.山东省1966—2015年 降水量、潜在蒸散量与湿润指数的时空分布特征及其影响因素[J].灌溉排水学报,0,():-. |
| ZHANG Kefeng,MA Bo,ZHANG Dalong.山东省1966—2015年 降水量、潜在蒸散量与湿润指数的时空分布特征及其影响因素[J].灌溉排水学报,0,():-. |
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| Spatial-temporal Variations in Precipitation, Potential Evapotranspiration and Humidity Index and Their Influencing Factors During 1966 to 2015 in Shandong Province |
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ZHANG Kefeng1,2, MA Bo3, ZHANG Dalong4
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1.College of continuing education,Shandong Agricultural University,Tai’an;2.Administrative department of wohushan reservoir;3.Jinan water administration detachment;4.College of Horticultural Science and Engineering,Shandong Agricultural University,Tai’an
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| Abstract: |
| 【Objective】Analyze the long-term spatial-temporal patterns of precipitation, potential evapotranspiration and humidity index in Shandong Province, thus providing the data support and decision basis for agricultural water resource management, soil and water conservation, etc. 【Method】Based on the meteorological data in 1966~2015 of 20 meteorological stations in Shandong Province, the spatial distributions of mean annual precipitation, potential evapotranspiration and humidity index were analyzed, and the relationships of these indicators with geographical position (latitude and longitude), elevation, and the related climatic factors were examined. Three typical stations from southeast to northwest were chosen to study the temporal variation in annual precipitation, potential evapotranspiration and humidity index as well as the regional difference in the influencing factors. 【Result】The mean annual precipitation decreased from southeast to northwest while mean annual potential evapotranspiration showed an opposite trend in Shandong Province; The mean annual humidity index ranged between 0.43~0.89, the semi-arid zone and semi-humid zone occupied 28.7% and 71.3% of the whole area of Shandong Province, respectively; According to the principle component analysis, Axis 1 and Axis 2 could explain over 70% of the variations in environmental variables, which correlated highly with elevation, temperature and relative humidity; The spatial distribution of mean annual precipitation correlated highly with elevation and temperature, and mean annual potential evapotranspiration was mainly affected by the distribution of relative humidity; During 1966~2015, annual precipitation and humidity index didn’t show significant temporal trend at the three typical stations, while there existed substantial differences in the temporal trend of annual potential evapotranspiration at different sites; At Rizhao, the aerodynamic term of potential evapotranspiration showed significant increasing trend due to the increase of temperature and decrease of wind speed, resulting in the increase of annual potential evapotranspiration. At Lingxian, the decline of radiation term exceeded the increase of aerodynamic term owing to the increase of relative humidity, therefore the annual potential evapotranspiration exhibited a decreasing trend.【Conclusion】The spatial distributions of precipitation, potential evapotranspiration and humidity index were influenced by the integrated effect of geographic positions, topography and climatic factors, and the temporal variation in these indicators and their correlations with the climatic factors differed considerably at different sites in Shandong Province. These quantitative findings were helpful for analyzing and regulating the water supply and demand conditions to achieve the sustainable management of water resource. |
| Key words: Precipitation;Potential evapotranspiration;Humidity index;Agricultural water resource management and soil and water conservation |
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