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当前位置: 首页 > 文章 > Spatial-temporal evolution of vegetation evapotranspiration in Hebei Province, China 农业科学学报 (英文) 2018,17 (9)
Position: Home > Articles > Spatial-temporal evolution of vegetation evapotranspiration in Hebei Province, China Journal of Integrative Agriculture 2018,17 (9)

Spatial-temporal evolution of vegetation evapotranspiration in Hebei Province, China

作  者：
Wang Qian-feng;Tang Jia;Zeng Jing-yu;Qu Yan-ping;Zhang Qing;Shui Wei;Wang Wu-lin;Yi Lin;Leng Song
单  位：
China Inst Water Resources & Hydropower Res, Res Ctr Flood & Drought Disaster Reduct, Beijing 100038, Peoples R China;Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China;Chinese Acad Sci, Shenzhen Inst Adv Technol, Geospatial Informat Ctr, Shenzhen 518055, Peoples R China;Fuzhou Univ, Fujian Prov Key Lab Remote Sensing Soil Eros & Di, Coll Environm & Resources, Fuzhou 350116, Fujian, Peoples R China;Univ Technol Sydney, Climate Change Cluster, Sydney, NSW 2007, Australia
关键词：
evapotranspiration;Hebei Province;MODIS;spatial pattern;vegetation;spatial-temporal evolution
摘  要：
Evapotranspiration (ET) is the sum of soil or water body evaporation and plant transpiration from the earth surface and ocean to the atmosphere, and thus plays a significant role in regulating carbon and water resource cycles. The time-series data set from the remote sensing MOIDS product (MOD16) was used to study the spatial-temporal evolution of vegetation evapotranspiration in salinized areas during 2000-2014 by analyzing the variability, spatial patterns and Mann-Kendall (MK) nonparametric trends for the time series. The results indicate that inter-annual and intra-annual variations of ET across various vegetated areas show seasonal changes, with the abnormal months identified. The cultivated land displays a greater degree of spatial heterogeneity and the spatial pattern of ET in the area covered by broadleaved deciduous forests corresponds to a higher ET rate and increased water consumption. Awidespread decline of ET is observed only in cultivated areas. However, agricultural cultivation doesn't worsen water shortage and soil salinization problems in the region, and water shortage problems are worsening for other vegetated areas. This research provides a basis of reference for the reasonable allocation of water resources and restructuring of vegetation patterns in salinized areas.

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