南水北调与水利科技2017，Vol.15Issue(6)：11-16,65,7.DOI:10.13476/j.cnki.nsbdqk.2017.06.002
海河流域潜在蒸散发估算方法及其时空变化特征
Model evaluation and spatial-temporal variations of potential evapotranspiration in Haihe Catchment
摘要
Abstract
Based on the observation data of average temperature,sunshine hours,wind speed,and relative humidity at 45 stations in Haihe Catchment during 1960-2012,we compared three potential evapotranspiration models with the Penman-Monteith model.The absolute and relative errors were used as the model evaluation indices.Hargreaves model based on energy balance proved to be the most suitable for potential evapotranspiration estimation in Haihe Catchment.The annual potential evapotranspiration declined at a mean rate of 2.04 mm/a in 1960-2012.The inter-annual variations of potential evapotranspiration in the four seasons all showed a significant decreasing trend,with the largest decline in summer and the smallest decline in winter.Spatially,the average potential evapotranspiration during 1960-2012 tended to increase from the northwest part of the region to the southeast.Moreover,the decrease of potential evapotranspiration occurred in most part of the region,especially in the southeast,which means potential evapotranspiration may be mainly impacted by global dimming.However,potential evapotranspiration in the northwest part of the region showed an increasing trend,probably due to global warming.关键词
潜在蒸散发/Penman-Monteith模型/适用性评估/蒸发悖论/时空变化规律Key words
potential evapotranspiration/Penman-Monteith model/applicability evaluation/evaporation paradox/spatial-temporal variations分类
天文与地球科学引用本文复制引用
赵娜,王治国,张复明,李泽..海河流域潜在蒸散发估算方法及其时空变化特征[J].南水北调与水利科技,2017,15(6):11-16,65,7.基金项目
国家重点研发计划项目(2016YFC0401004 （）
2016YFC0401005) （）
中央高校基本科研业务费专项资金(HUST:2017KFYXJJ191).National Key Research and Development Program(2016YFC0401004,2016YFC0401005) （HUST:2017KFYXJJ191）
Fundament al Research Funds for the Central Universities(HUST:2017KFYXJJ191) （HUST:2017KFYXJJ191）
