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[1]REN Liqing,DONG Guotao,GU Jiahe,et al.Spatiotemporal Distribution and Driving Force Analysis of Vegetation in the Upper Reaches of Heihe River[J].Research of Soil and Water Conservation,2021,28(04):244-250.

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Spatiotemporal Distribution and Driving Force Analysis of Vegetation in the Upper Reaches of Heihe River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 04 Page number: 244-250 Column: Public date: 2021-08-10

Title:: Spatiotemporal Distribution and Driving Force Analysis of Vegetation in the Upper Reaches of Heihe River

Author(s):: REN Liqing¹, DONG Guotao^2,3, GU Jiahe³, XUE Huazhu³, NIE Tong⁴; (1.Urumqi Meteorological Satellite Ground Station, Urumqi 830011, China; 2.Heihe Water Resources and Ecological Protection Research Center, Lanzhou 730030, China; 3.School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China; 4.College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China)

Keywords:: NDVI; geographic detector; natural factor; upper reaches of Heihe River

CLC:: TP79;P463.22

DOI:: -

Abstract:: In order to explore the important role of spatiotemporal change of vegetation and its relationship with natural factors in ecological protection, based on vegetation, climate, soil and terrain data, the spatial-temporal variation characteristics of vegetation and the influence mechanism of natural factors on the spatial distribution pattern of vegetation in the upper reaches of Heihe River were revealed by using the method of geographic detector model, and the most suitable characteristics of the main natural factors promoting vegetation growth were determined. The results show that:(1)the NDVI of the vegetation in the study area showed a spatial distribution characteristic of high in the southeast and low in the northwest, and the NDVI showed a fluctuating increase trend with a growth rate of 0.001 7 annually from 2001 to 2017 and the improvement areas mainly distributed in the central and northern regions;(2)factors such as sunshine duration, elevation and precipitation, which were the main factors affecting the spatial distribution of vegetation, explained the spatial differentiation of vegetation NDVI;(3)the interaction between vegetation NDVI and natural factors showed mutual enhancement or nonlinear enhancement in the upper reaches of Heihe River. The optimal range of natural factors promoting vegetation growth and the mean NDVI under these conditions are obviously different, and heat becomes the main limiting factor of vegetation growth in high altitude areas.

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Last Update: 2021-08-20