Spatial distribution of reference crop evapotranspiration in Hangjiahu Area

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Zhang, Y.D.^1 ; Zheng, S.Z.^1 ; Lu, C.^1 ; Jia, H.W.^1 ; Huang, W.Y.^1

Zhejiang Institute of Hydraulics and Estuary, Hangzhou

310020, China^1

关键词: Crop water requirements;    Food and agriculture organizations;    Inverse distance-weighted interpolation;    Meteorological data;    Meteorological parameters;    Meteorological station;    Penman-Monteith method;    Reference crop evapotranspirations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012078/pdf
DOI  :  10.1088/1755-1315/191/1/012078

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The reference crop evapotranspiration (ET0 ) is an important parameter for calculating crop water requirement. Based on meteorological data of nearly 50 years from 6 meteorological stations in Hangjiahu area, the reference crop evapotranspiration is calculated by using the Penman-Monteith method recommended by Food and Agriculture Organization of United Nations (FAO). By using Geographical Information System (GIS) spatial analysis function, the maps of reference crop evapotranspiration with meteorological parameters used in the analysis are obtained by inverse distance weighted interpolation method. The results show that the mean values of ET 0 range from 811.2 to 1039.9 mm, and it decreases from eastern to western of the study area. ET 0 values of the plain area are higher than that of the mountain area, which shows the same pattern as the spatial distribution trend of temperature trend.