A Comparison of Daily Actual Evapotranspiration Evaluation Models Based on Field Observational Data
Received date: 2009-12-30
Revised date: 2010-06-21
Online published: 2010-09-10
With the newly-designed high resolution lysimeter installed in Nanchang County of Jiangxi Province, the observed overland actual evapotranpiration (ETa) from September 1, 2007 to August 31, 2008 is used to validate three daily ETa model, i.e. CRAE (Complementary Relationship Areal Evapotranspiration), GG (Granger-Gray) and AA (Advection-Aridity) models on different time scales, and the model error is also discussed. The results show that the observed annual average ETa is 746.1 mm, while the error of calculated ETa by models with the original parameters is quite large. Calculated ETa of the three models is smaller than the observed value in dry condition and larger than the observation in moisture condition. The models with calibrated parameters show better predictability than the original ones, yet the improvement in daily calculation is limited. Calculation on a 7-day time scale is remarkably better than daily values: there is a systematic error for AA model, and RMSE of CRAE model is fairly large, yet GG model is relatively the best. According to the comparison with the observations of the lysimeter, locally calibrated models would show reliable results on 7-day or longer time scale. The above-mentioned research is of great importance in full understanding of ETa process, of predictability of models on different time scales and of the water cycle character under climate change condition.
Liu Bo,Zhai Jianqing,Gao Chao,Jiang Tong,Wang Yanjun . A Comparison of Daily Actual Evapotranspiration Evaluation Models Based on Field Observational Data[J]. Advances in Earth Science, 2010 , 25(9) : 974 -980 . DOI: 10.11867/j.issn.1001-8166.2010.09.0974
[1] Ohmura A, Wild M. Is the hydrological cycle accelerating?[J]. Science, 2002, 298: 1 345-1 346.
[2] Ramanathan V, Crutzen P J, Kiehl J T, et al. Aerosols, climate, and the hydrological cycle[J]. Science, 2001, 294: 2 119-2 124.[3] Wang Shaowu, Gong Daoyi. Studies on climate change in China[J].Climatic and Environmental Research,2002,7(2):137-145.[王绍武, 龚道溢. 中国气候变化的研究[J]. 气候与环境研究, 2002, 7(2): 137-145.]
[4] Lawrence Dingman S. Physical Hydrology[M]. Waveland Press Inc, 2002: 312-320
[5] Xu Ziwei, Liu Shaomin, Xu Tongren, et al. Comparison of the gap filling measured by eddy methods of evapotranspiration covariance system[J].Advances in Earth Science,2009,24(4):372-382.[徐自为，刘绍民，徐同仁，等.涡动相关仪观测蒸散量的插补方法比较[J].地球科学进展，2009,24(4):372-382.]
[6] Wang Weizhen, Xu Ziwei, Liu Shaomin, et al. The characteristics of heat and water vapor fluxes over different surfaces in the Heihe river basin[J].Advances in Earth Science,2009,24(7):714-723.[王维真，徐自为，刘绍民，等.黑河流域不同下垫面水热通量特征分析[J].地球科学进展，2009,24(7):714-723.]
[7] Bouchet R J. Evapotranspiration reele et potentielle, signification climatique[J].Public General Assembly Berkeley, International Association Science Hydrology, Gentbrugge, Belgium,1963, 62:134-142.
[8] Brutsaert Wilfried, Stricker Han. An Advection-aridity approach to estimate actual regional evapotranspiration[J].Water Resource Research,1979, 15: 443-449.
[9] Morton F I. Operational estimates of areal evapotranspiration and their significance to the science and practice of hydrology[J].Journal of Hydrology, 1983, 66:1-76.
[10] Granger R J, Gray D M. Evaporation from natural nonsaturated surfaces[J].Journal of Hydrology, 1989, 111:21-29.
[11] Marc B Parlance, Gabriel G Katul. An advection-aridity evaporation model[J].Water Resource Research, 1992, 28(1): 127-132.
[12] Liu Shaomin, Sun Rui, Sun Zhongping, et al. Comparison of different complementary relationship models or regional evapotranspiration Estimation[J].Acta Geographica Sinica,2004,59(3):331-340.[刘绍民，孙睿，孙中平,等.基于互补相关原理的区域蒸散量估算模型比较[J].地理学报，2004,59(3):331-340.]
[13] Qi Peitong, Gu Song, Tang Yanhong, et al. Comparison of three methods for measurement of evapotranspiration in an alpine meadow[J].Acta Ecologica Sinica,2008,28(1):202-211.[戚培同，古松，唐艳鸿,等.三种方法测定高寒草甸生态系统蒸散比较[J].生态学报，2008,28(1):202-211.]
[14] Wang Shugong, Kang Ersi, Jin Bowen, et al. A study of estimation of evapotranspiration on grass land in the mountains of Hei river basin[J]. Journal of Glaciology and Geocryology, 2003,25(5):558-565.[王书功，康尔泗，金博文，等.黑河山区草地蒸散发量估算方法研究[J].冰川冻土，2003,25(5):558-565.]
[15] 江西赣江水位连创历史新低[EB/OL].http://news.xinhuanet.com/newscenter/2007-11/15/content_7081164.htm,2009.
[16] Priestley C H B, Taylor R J. On the assessment of surface heat flux and evaporation using large-scale parameters[J]. Monthly Weather Review, 1972, 100(2): 81-92.
[17] Granger R J. A complementary relationship approach for evaporation from nonsaturated surfaces[J].Journal of Hydrology,1989, 111:31-38.
[18] Xu C Y, Singh V P. Evaluation of three complementary relationship evapotranspiration models by water balance approach to estimate actual regional evapotranspiration in different climatic regions[J].Journal of Hydrology, 2005,(308):105-121.
[19] Hobbins M T, Ramirez J A, Brown T C. The complementary relationship in estimation of regional evapotranspiration: An enhanced advection aridity model[J].Water Resources Research, 2001,37(5):1 389-1 403.
/
| 〈 |
|
〉 |
甘公网安备62010202000687
