Land cover type change characteristics and driving factors in Hetao oasis

doi:10.7522/j.issn.1000-694X.2021.00073

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (5): 210-218.DOI: 10.7522/j.issn.1000-694X.2021.00073

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Land cover type change characteristics and driving factors in Hetao oasis

Liping Liu¹(), Liangxu Liu²^,⁴(), Jie Lian³, Jiannan Lu², Guolin Wang⁵

^1.Hetao University，Bayannur 015000，Inner Mongolia，China
^2.Urat Desert-grassland Research Station /, Northwest Institute of Eco-Environment and Resources，Chinese Acdemy of Sciences，Lanzhou 730000，China
^3.Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources，Chinese Acdemy of Sciences，Lanzhou 730000，China
^4.State Key Laboratory of Loess and Quaternary Geology，Institute of Earth Environment，Urad Rear Banner，Xi’an 710000，China
^5.National Nature Reserve Management Station of Haloxylon Forest and Mongolia Wild Donkey in Urad Rear Banner，Bayannur 015000，Inner Mongolia，China

Received:2021-03-16 Revised:2021-05-24 Online:2021-09-20 Published:2021-09-23
Contact: Liangxu Liu

Abstract

Abstract:

Land use change is one of the driving forces of land cover change and has an important impact on the structure and function of the desert-oasis ecosystems. Taking Urad Rear Banner and Urad Middle Banner （two counties） located in the northern part of Yin Mountain as well as Wuyuan county and Hanggin Rear Banner right to the south of Yin mountains as research region， and the statistical data in this region， the relation among the annual precipitation， population， livestock number， and land use cover have been analyzed， with the interpretation data of the satellite images in 1987 and 2015. The results showed that cropland was increased， grassland decreased， and the planted woodland decreased too and there are significant relationships between population and livestock number and cropland， and the relationship between the three before with annual precipitation is not significant， the best fitting equations are respectively y=1.2407x-235428 and y=2613.3e^1E-05^x. This research could supply a solid data and theoretical support to the sustainable land use and high-quality development of the Hetao section of the Yellow River in Inner-Mongolia.

Key words: land use, Hetao Plain, cultivated land change, curve fitting

CLC Number:

P901

Liping Liu, Liangxu Liu, Jie Lian, Jiannan Lu, Guolin Wang. Land cover type change characteristics and driving factors in Hetao oasis[J]. Journal of Desert Research, 2021, 41(5): 210-218.

Figures/Tables 11

Fig.1 Location of study area.

Table 1 Characteristic of precipitation of four area.

旗县	极小值/mm	极大值/mm	均值/mm	标准差/mm
杭后	43	275	143.93	51.546
五原	72	371	183.37	71.698
中旗	106	443	211.78	69.342
后旗	54	325	144.37	57.820

Fig.2 Variation of annual precipitation

Fig.3 Changes of LUCC from 1985-2015 in Bayannaoer

Table 2 LUCC and k variation

类型	变化面积/km²	动态度k
耕地	7 425.489	0.215
林地	-1 097.692	-0.022
草地	-878.263	-0.001
戈壁	1 566.037	0.009
裸岩	-968.749	-0.004
沙漠	2 899.342	0.042

Fig.4 Change of cultivated land in four area

Fig.5 Curve of livestock change in four areas

Fig.6 Curve of population change in four areas

Table 3 Correlation analysis of different facts.

类型	耕地	人口	家畜/万头	年降水/mm
耕地	1	0.554^**	0.735^**	0.017
人口	0.554^**	1	0.353	0.092
牲畜	0.735^**	0.353	1	0.086
年降水量	0.017	0.092	0.086	1

Fig.7 The fitting curve between livestock and cultivated land area

Fig.8 The fitting curve between population and cultivated land area

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Land cover type change characteristics and driving factors in Hetao oasis

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