Estimation of Actual Evapotranspiration Distribution in the Huaihe River Upstream Basin Based on the Generalized Complementary Principle

Advances in Meteorology - Tập 2018 - Trang 1-9 - 2018
Jiaqi Gao1, Miao Qiao2, Xinfa Qiu3, Yan Zeng4, Huanhuan Hua5, Xiuzhi Ye6, Mustapha Adamu7
1College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing 210044, China
2Inner Mongolia Meteorological Information Center, Huhehot 010000, China
3College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China
4Climate Centre of Jiangsu Province, Jiangsu Provincial Meteorological Bureau, Nanjing 210009, China
5Nanjing Broadcasting System, Nanjing 210001, China
6Jinjiang Meteorological Bureau, Quanzhou 362200, China
7College of International Students, Nanjing University of Information Science and Technology, Nanjing 210044, China

Tóm tắt

The accurate estimation of actual evapotranspiration can help improve the utilization of water resources and ease the ecological stress. Based on the generalized complementary principle proposed by Brutsaert in 2015, we used meteorological and hydrological data to estimate the actual evapotranspiration at a resolution of 1 km × 1 km between the years of 1961 and 2000 and also verified the model’s stability. In this study, we used the water balance equation to calibrate the parameters, coupled with the spatial simulation results of the meteorological elements in the actual evapotranspiration model. The estimation results of actual evapotranspiration show that the generalized complementary principle model had high estimation precision in this basin, with an average absolute error of 16.64 mm and an average relative error of 2.25%. With respect to spatial distribution, the average actual evapotranspiration over the years in the basin tended to have high and low distribution in the northern and southern parts of the basin, respectively. The actual evapotranspiration in the basin showed a decreasing trend over the period, with a rate of 24.1 mm/10 years. Correlation coefficient analysis showed that the percentage decreases in percentage sunshine and the decreases in the daily range of temperature were the main reasons for the decrease in actual evapotranspiration.

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Advances in Meteorology

Tập 2018

1-9

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