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 

机构地区：[1]Fujian Provincial Key Laboratory of Remote Sensing of Soil Erosion and Disaster Protection/College of Environment and Resources,Fuzhou University,Fuzhou 350116,P.R.China [2]Research Center on Flood and Drought Disaster Reduction,China Institute of Water Resources and Hydropower Reseat'ch,Beijing 100038,P.R.China [3]Key Laboratory of Digital Earth Science,Institute of Remote Sensing and Digital Earth,Chinese Academy of Science,Beijing 100094,P.R.China [4]Geospatial Information Center,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,P.R.China [5]Climate Change Cluster,University of Technology Sydney,New South Wales 2007,Australia

出　　处：《Journal of Integrative Agriculture》2018年第9期2107-2117,共11页农业科学学报（英文版）

基　　金：financial support from the National Key Research and Development Program of China(2017YFC1502404);the National Natural Science Foundation of China(41601562 and 41761014);the China Institute of Water Resources and Hydropower Research Team Construction and Talent Development Project(JZ0145B752017);the Research Project for Young Teachers of Fujian Province,China(JAT160085)

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 MOLDS 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.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 MOLDS 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.

关 键 词：EVAPOTRANSPIRATION Hebei Province MODIS spatial pattern VEGETATION spatial-temporal evolution 

分 类 号：Q948[生物学—植物学]