摘要
基于常见6种潜在蒸散发估算模式的对比、遴选及应用,就1981 2010年洮河流域ET0的时空变化特征进行研究.模式遴选结果表明Penman-Monteith模式在洮河流域潜在蒸散发计算中的精度最高.将该模式应用到洮河流域,发现洮河流域自上游甘南草原至下游黄土农耕区,潜在蒸散发逐渐增高.过去30年,洮河流域ET0总体呈上升趋势,气温升高为主导因素.增幅以牧林农混合区最大,山地森林区和黄土农耕区次之,甘南草原区最小.
Accuracy assessments of potential evapotranspiration (ET0) estimation from six selected modules were conducted and the best module based on a comparison of the assessments was adopted to simulate the ET0 variation from 1981-2010 across the Tao River basin. Accuracy assessments resulted in the best module of Penman-Monteith method for ET0 estimation in the TRB. Application of the best module concluded that there has been an increase of the regional ET0 in the TRB along with the increase of the air temperature. Additional analysis revealed that ET0 spatially grew from the upper reaches to the lower reaches. The maximum amplification of ET0 was found in the area of pastoral forest with cultivation while the minimum one was found in the area of single pasture in the upper reaches of the TRB. Amplification of ET0 in areas of mountainous forest in the middle reaches and loessial cultivation in the lower reaches of the TRB were of intermediate degree when compared with the above two.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第6期727-732,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金青年科学基金项目(41001014)
高等学校博士学科点专项科研基金项目(20110211110011)
