Sensitivity Analysis of Reference Crop Evapotranspiration in Shiyang River Basin in Recent 53 Years
|更新时间:2025-03-12
|
Sensitivity Analysis of Reference Crop Evapotranspiration in Shiyang River Basin in Recent 53 Years
Bulletin of Soiland Water ConservationVol. 33, Issue 1, Pages: 303-306(2014)
作者机构:
西北师范大学地理与环境科学学院,甘肃,兰州,730070
作者简介:
基金信息:
DOI:
CLC:
Published:2014
稿件说明:
移动端阅览
ZHANG Chun-ling, ZHANG Bo, ZHOU Dan, et al. Sensitivity Analysis of Reference Crop Evapotranspiration in Shiyang River Basin in Recent 53 Years[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 303-306.
DOI:
ZHANG Chun-ling, ZHANG Bo, ZHOU Dan, et al. Sensitivity Analysis of Reference Crop Evapotranspiration in Shiyang River Basin in Recent 53 Years[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 303-306.DOI:
Sensitivity Analysis of Reference Crop Evapotranspiration in Shiyang River Basin in Recent 53 Years
The sensitivity coefficients of daily reference evapotranspiration(ET0) to average temperature
wind speed
relative humidity and sunshine hours in the Shiyang River basin during 1959-2011 were calculated by using Penman-Monteith equation recommended by FAO
based on daily meteorological data provided by the China Meteorological Administer. Moreover
temporal variations of the sensitivity coefficients were analyzed. Results show that relative humidity was the most sensitive factor of ET0 in the Shiyang River basin
wind speed and temperature were in the second place
and sunshine hours had the lowest sensitivity. Because of climate factors contrast and significant spatial difference of the sensitive coefficients
the sensitive coefficient of relative humidity formed high value area in the upstream area of the Qilian Mountains. Meanwhile
the sensitive coefficient of temperature was relatively large. But the sensitive coefficient of wind speed was the largest in the downstream area of the Minqin basin. The sensitive coefficient of sunshine hours had no significant difference in all the areas. The sensitive coefficient of each of the meteorological factors showed a certain degree of volatility. Wind speed was high in winter
but low in summer; temperature and sunshine hours were all high in summer; and the absolute value of relative humidity continued to rise to the maximum in fall. The sensitive coefficient of relative humidity fluctuated in the past 53 years
absolute value showed a significant upward trend
but the wind speed
sunshine hours and temperature had no obvious trend in the last 20 years.
关键词
Keywords
references
秦大河.中国西部环境演变评估:综合卷[M].北京:科学出版社,2002:73-78.
Zhang Qiang, Song Lianchun, Huang Ronghui. The bulk transfer coefficients of the atmospheric momentum and sensible heat over desert and Gobi in arid climate region of Northwest China[J]. Sci. China:Series D, 2002,45(5):468-480.
Zhang Qiang, Song Lianchun, Huang Ronghui.. Characteristics of hydrologic transfer between soil and atmosphere over Gobi near oasis at the end of summer[J]. Adv. Atmos. Sci., 2003,20(3):442-452.
Gong Lebing, Xu Chongyu, Chen Deliang. Sensitivity of the Penman-Monteith reference evapotranspiration to key climatic variables in the Changjiang basin[J]. Journal of Hydrology, 2006,329(3/4):620-629.
Allen R G, Pereira L S, Raes D, et al. Crop Evapotranspiration:Guidelines for Computing Crop Water Requirements[M]. Rome:United Nations Food and Agriculture Organization, 1998.
Yin Yunhe, Wu Shaohong, Zheng Du, et al. Radiation calibration of FAO 56 Penman-Monteith model to estimate reference crop evapotranspiration in China[J]. Agricultural Water Management, 2008,95(1):77-84.
Penman H L. Natural evaporation from open water, bare soil and grass[J]. Proceedings of the Royal Society of London(Series A):Mathematical and Physical Sciences, 1948,193(1032):120-146.
Coleman G, DeCoursey D G. Sensitivity and model variance analysis applied to some evaporation and evapotranspiration models[J]. Water Resource Research, 1976,12(5):873-879.
刘明春.石羊河流域气候干湿状况分析及评价[J].生态学杂志,2006,25(8):880-884.
Hupet F, Vanclooster M. Effect of the sampling frequency of meteorological variables on the estimation of the reference evapotranspiration[J]. Journal of Hydrology, 2001,24(3):192-204.