[1]YANG Jiangzhou,ZHOU Xu,CHENG Dongya,et al.Spatiotemporal Change Characteristics of MOD16 Evapotranspiration in Different Geomorphic Types of Guizhou Province[J].Research of Soil and Water Conservation,2019,26(02):216-222.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 02
Page number:
216-222
Column:
Public date:
2019-04-28
- Title:
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Spatiotemporal Change Characteristics of MOD16 Evapotranspiration in Different Geomorphic Types of Guizhou Province
- Author(s):
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YANG Jiangzhou, ZHOU Xu, CHENG Dongya, ZHANG Ji, NIU Qian
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School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China
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- Keywords:
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MOD16; evapotranspiration; spatiotemporal change characteristics; different geomorphic types; Guizhou Province
- CLC:
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P426.2
- DOI:
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- Abstract:
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The study on the temporal and spatial evolution characteristics of evapotranspiration in karst mountain area of Guizhou Province is of great significance to the efficient utilization of water resources and the construction of ecological environment. Based on the remote sensing data set of MOD16 products, the annual, interannual and intra-annual spatiotemporal changes of surface evapotranspiration in karst mountain from 2000 to 2014 were statistically analyzed to explore the differences of characteristics of evapotranspiration of different types and landforms in karst basin. The results showed that: (1) from 2000 to 2014, the amount of evapotranspiration in Guizhou mountainous area of karst annual change trend was not obvious, the average annual evapotranspiration was 854.95 mm, the spatial distribution of average evapotranspiration showed the higher values in the southeast, the lower values in northwest, the moderate values in the center, presenting three-ladder step distribution pattern; (2) the trend of monthly mean change in each basin showed a single peak change trend at first and then decreased; the highest and lowest ones appeared in July and January, respectively, and the mean and overall difference between years of evapotranspiration in different geomorphic types were obvious; (3) from the geomorphological type, the annual average evapotranspiration decreased in the order: peak cluster depressions > non karst landform > karst valley > karst plateau > karst faulted basin > karst gorge; (4) in the future, the spatial distribution of evapotranspiration will mainly present the pattern of the decreasing trend in the eastern and western regions and increasing trend in the central region.