Spatio-Temporal Change and Driving Force of Oasis for Desert Reservoir from 1988 to 2016 in Northwestern China
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College of Geography and Environmental Science, Northwest Normal University, Lanzhou, Gansu, China
School of Urban Economics and Tourism Culture, Lanzhou City University, Lanzhou, Gansu, China
Submission date: 2018-10-11
Final revision date: 2018-11-19
Acceptance date: 2018-11-27
Online publication date: 2019-09-10
Publication date: 2019-12-09
Corresponding author
Wei Wei   

College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China, Tianshui road in Lanzhou city,Gansu province,China, 730070 Lanzhou, China
Pol. J. Environ. Stud. 2020;29(1):871-884
The interaction and influence mechanism between oasis and desert is an important component of landscape geography in arid areas. The oasis of Hong Yashan Region (OHR) is a typical tail oasis continental river in northwestern China, located in the northern temperate arid desert area belonging to an extremely arid continental climate. In this paper, the spatial distribution information of the oasis in Hong Yashan region was extracted through obtaining remote sensing imagery in 1988, 1992, 1995, 2000, 2004, 2008a, 2013, and 2016. The quantitative models and geographical grid method were used to analyze area changes, direction migrating, intensity fluctuating, and forces driving in order to understand the change mechanism. The results show that during 1988-2016, the oasis area increased first and reached the peak value of 1,343.67 km2 in 2004, then decreased to the valley value of 1,026.66 km2 in 2008, and then increased again to 1,077.59 km2 in 2016. The dominant factors which affected oasis changes were distinct in the different periods and positions, and they interacted with each other. We found that the dynamic changing process of an oasis was the result of natural and human activities. The growth of oasis both in area and distribution have been affected by natural factors through water resource changes.
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