Analysis of the Reference Evapotranspiration Change and Climate Factors Contribution During Growing Season in Linghe Basin of Liaoning Province

doi:10.3969/j.issn.1000-6362.2015.01.005

Abstract

Abstract: Based on the daily meteorological dataset during 1965 to 2006 from 10 meteorological stations in Linghe basin of Liaoning province，the reference evapotranspiration（ET0）was calculated using P-M equation recommended by FAO.And with the analysis of variation trend relating to meteorological elements and ET0 during growing season（from April to September），the contribution to ET0 change made by meteorological alteration was also discussed with a method based on sensitivity coefficient.The results showed that the average value of ET0 during growing season in Linghe basin was 706.73mm and it was significantly reducing at a speed of 21.46mm·10y-1in the past 42 years（P<0.01）.During the whole season，the ET0 in May accounted for the most while that in Sep.came the least.The high value of ET0 concentrated in Chaoyang and Yangshan and the low value was in Yixian.The average solar radiation of whole growing season in the study area was declining at a speed of 0.293MJ·m-2·d-1·10y-1.Except in Fuxin station，the wind speed was significantly decreasing（P<0.01）.Under the background of global warming，the average temperature of Linghe basin in growing season during the past 42 years was increasing at a speed of 0.289℃·10y-1 and the trend was obvious in April and September（P<0.05）while that was relative stable in July.The change of relative humidity during growing season in the study area was not serious.The sensitivity analysis results showed that the sensitivity order of average ET0 in Linghe basin to different meteorological elements in growing season was: solar radiation >relative humidity>wind speed>temperature.But as to contribution value，the significantly changed wind speed was the most important factor to ET0 variation，followed by solar radiation，and the temperature did the least to ET0 variation.Meanwhile，the contribution of solar radiation and wind speed change to ET0 variation in western basin was greater，and smaller in the east，while that of temperature showed a progressive decrease tendency from the middle to both sides on the whole.The contribution of relative humidity change to ET0 alteration was scattered on spatial distribution.

Key words: Sensitivity coefficient, Spatial distribution, Contribution, Reference evapotranspiration

XU Xing juan，CHEN Tao tao，WU Qi，WANG Zi huang，ZHENG Jun lin，CHI Dao cai. Analysis of the Reference Evapotranspiration Change and Climate Factors Contribution During Growing Season in Linghe Basin of Liaoning Province[J]. Chinese Journal of Agrometeorology, 2015, 36(01): 33-42.

References

[1]刘勤，严昌荣，梅旭荣，等.西北旱区参考作物蒸散量空间格局演变特征分析[J].中国农业气象，2012，33(1)：48-53.
Liu Q，Yan C R，Mei X R，et al. Spatial evolution of reference crop evapotranspiration in arid area of Northwest China[J].Chinese Journal of Agrometeorology，2012，33(1):48-53.(in Chinese)
[2]张淑杰，张玉书，隋东，等.东北地区参考蒸散量的变化特征及其成因分析[J].自然资源学报，2010，25(10)：1750-1761.
   Zhang S J, Zhang Y S，Sui D，et al. Changes in reference evapotranspiration and its causes in Northeast China[J].Journal of Natural Resources，2010，25(10)：1750-1761.(in Chinese)
[3]曾丽红，宋开山，张柏，等.东北地区参考作物蒸散量对主要气象要素的敏感性分析[J].中国农业气象， 2010，31(1)：11-18.
   Zeng L H, Song K S，Zhang B，et al. Sensitive analysis on reference evapotranspiration to key meteorological factors in Northeast China[J].Chinese Journal of Agrometeorology,2010，31(1)：11-18.(in Chinese)
[4]曾丽红，宋开山，张柏，等.近60年来东北地区参考作物蒸散量时空变化[J].水科学进展，2010，21(2)：194-200.
   Zeng L H, Song K S，Zhang B，et al. Spatiotemporal variability of reference evapotranspiration over the Northeast region of China in the last 60 years[J].Advances in Water Science，2010，21(2)：194-200.(in Chinese)
[5]段春锋，缪启龙，曹雯.西北地区参考作物蒸散变化特征及其主要影响因素[J].农业工程学报，2011，27(8)：77-83.
   Duan C F，Miao Q L，Cao W.Changing characteristics of reference crop evapotranspiration and main causes in the Northwest China[J].Transactions of the Chinese Society of Agricultural Engineering，2011，27(8)：77-83.(in Chinese)
[6]李春友，张劲松，孟平，等.黑龙港流域参考作物蒸散量的时序变化和分形特征[J].中国农业气象，2011，32(1)：81-88.
   Li C Y，Zhang J S，Meng P，et al.Study on temporal variation and fractal characteristics of reference crop evapotranspiration in the Heilonggang basin[J].Chinese Journal of Agrometeorology,2011，32(1)：81-88.(in Chinese)
[7]王卫光，邢万秋，彭世彰，等.海河流域50年来参考作物腾发量的时空变化规律及其影响原因[J].应用基础与工程科学学报，2012，20(2)：237-252.
Wang W G，Xing W Q，Peng S Z，et al.Spatial and temporal patterns of reference evapotranspiration changes and their causes in the Haihe river basin during the past 50 years^，China[J].Journal of Basic Science and Engineering，2012，20(2)：237-252.(in Chinese)
[8]郝振纯，安贵阳，王加虎，等.淮河中上游参考作物腾发量趋势变化及其成因[J].生态环境学报，2013，22(9)：1528-1533.
Hao Z C，An G Y，Wang J H，et al.Trends in reference evapotranspiration and the main causes during 1959-2009 in Upper and Middle Huaihe river basin, China[J].Ecology and Environmental Sciences，2013，22(9)：1528-1533.(in Chinese)
[9]Xu C Y，Gong L B，Jiang T，et al. Analysis of spatial distribution and temporal trend of reference evapotranspiration and pan evaporation in Changjiang(Yangzi river) catchment[J].Journal of Hydrology，2006，327：81-93．
[10]罗玉峰，缴锡云，彭世彰.柳园口灌区参考作物腾发量的长期变化趋势及其对灌溉需水量的影响[J].中国农学通报，2008，24(9)：480-484.
    Luo Y F，Jiao X Y，Peng S Z.Long-term trend of reference evapotranspiration in Liuyuankou irrigation system and its impacts on irrigation water requirements[J].Chinese Agricultural Science Bulletin，2008，24(9)：480-484.(in Chinese)
[11]曹雯，申双和，段春锋.西北地区近49年生长季参考作物蒸散量的敏感性分析[J].中国农业气象，2011，32(3)：375-381.
Cao W，Shen S H，Duan C F.Sensitivity analysis of the reference crop evapotranspiration during growing season in the Northwest China in recent 49 years[J].Chinese Journal of Agrometeorology，2011，32(3)：375-381.(in Chinese)
[12]Yin Y H，Wu S H，Chen G，et al.Attribution analyses of potential evapotranspiration changes in China since the 1960s[J].Theor. Appl. Climatol.，2010，101：19-28.
[13]曹雯，申双和，段春锋.西北地区生长季参考作物蒸散变化成因的定量分析[J].地理学报，2011，66(3)：407-415.
Cao W，Shen S H，Duan C F.Quantification of the causes for reference crop eapotranspiration changes in growing season in Northwest China[J].Acta Geographica Sinica，2011，66(3)：407-415.(in Chinese)
[14]Zhang X T，Kang S Z，Zhang L，et al.Spatial variation of climatology monthly crop reference evapotranspiration and sensitivity coefficients in Shiyang river basin of northwest China[J]. Agricultural Water Management，2010，97：1506-1516.
[15]梁丽乔，李丽娟，张丽，等.松嫩平原西部生长季参考作物蒸散发的敏感性分析[J].农业工程学报，2008，24(5)：1-5.
Liang L Q，Li L J，Zhang L，et a1.Sensitivity of the reference crop evapotranspiration in growing season in the West Songnen Plain[J].Transactions of the CSAE，2008，24(5)：1-5．(in Chinese)
[16]李春强，洪克勤，李保国.河北省近35年(1965-1999年)参考作物蒸散量的时空变化[J].中国农业气象，2008，29(4)：414-419.
Li C Q，Hong K Q，Li B G.Analysis of temporal spatial variations of reference evapotrans piration during 1965 and 1999 in Hebei province[J].Chinese Journal of Agrometeorology，2008，29(4)：414-419.(in Chinese)
[17]陈超，庞艳梅，潘学标，等.四川地区参考作物蒸散量的变化特征及气候影响因素分析[J].中国农业气象，2011，32(1)：35-40.
Chen C，Pang Y M，Pan X B，et a1.Analysis on change of reference crop evapotranspiration and climatic influence factors in Sichuan[J].Chinese Journal of Agrometeorology，2011，32(1)：35-40.(in Chinese)
[18]曹雯，申双和，段春锋.中国西北潜在蒸散时空演变特征及其定量化成因[J].生态学报，2012，32(11)：3394-3403.
Cao W，Shen S H，Duan C F.Temporal-spatial variations of potential evapotranspiration and quantification of the causes in Northwest China[J].Acta Ecologica Sinica, 2012，32(11)：3394-3403.(in Chinese)