Key Data Results and Trend Analysis of the Sixth National Survey on Desertification and Sandification

doi:10.13466/j.cnki.lyzygl.2023.01.001

Abstract

Abstract:

The Sixth National Survey on Desertification and Sandification was based on the results of the Third National Land Survey,using 2019 as the benchmark year.The results showed a comprehensive status of desertification and sandification in China.This paper presented a brief overview of this survey,the status and dynamic changes of desertification and sandification in China,conducted a comprehensive analysis of the current situation,and proposed some suggestions for combating desertification and sandification.The survey results showed that,until 2019,the desertification land area in China was 257.371 3 million hm² and the sandification land area was 168.782 3 million hm².Compared with 2014,the desertification area of China decreased by 3.788 0 million hm² with an average annual decrease of 757.6 thousand hm².The sandification area of China decreased by 3.335 2 million hm² with an average annual net reduction of 667 thousand hm².

Key words: desertification, sandification, status, dynamic changes

CLC Number:

S288

Cite this article

ZAN Guosheng, WANG Cuiping, LI Feng, LIU Zheng, SUN Tao. Key Data Results and Trend Analysis of the Sixth National Survey on Desertification and Sandification[J]. FOREST RESOURCES WANAGEMENT, 2023, (1): 1-7.

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Figures/Tables 6

Tab.1

Dynamic changes of desertification and sandification land,2014—2019

年度	荒漠化土地		沙化土地
年度	总面积/ 万hm²	占国土面积比例/%	总面积/ 万hm²	占国土面积比例/%
2014年	26115.93	27.20	17211.75	17.93
2019年	25737.13	26.81	16878.23	17.58
2014—2019年	-378.8	-0.39	-333.52	-0.35

Tab.1

Fig.1

Annual average area changes of desertification land in different survey periods

Fig.1

Fig.2

Annual average area changes ofsandification land in different survey periods

Fig.2

Tab.2

Dynamic changes of desertification land by severity,2014—2019

荒漠化程度	2014年		2019年		2014—2019年
荒漠化程度	面积/万hm²	百分比/%	面积/万hm²	百分比/%	变化面积/万hm²	占比变化/%
总面积	26115.93	100.00	25737.13	100.00	-378.8
轻度	7492.79	28.69	7585.13	29.47	92.34	0.78
中度	9255.25	35.44	9302.95	36.15	47.7	0.71
重度	4021.20	15.40	3828.23	14.87	-192.97	-0.52
极重度	5346.69	20.47	5020.82	19.51	-325.87	-0.96

Tab.2

Tab.3

Dynamic changes of sandification land by severity,2014—2019

沙化程度	2014年		2019年		2014—2019年
沙化程度	面积/万hm²	百分比/%	面积/万hm²	百分比/%	变化面积/万hm²	占比变化/%
总面积	17211.75	100.00	16878.23	100.00	-333.52
轻度	2611.43	15.17	3085.1	18.28	473.67	3.11
中度	2536.19	14.74	3277.71	19.42	741.52	4.68
重度	3335.22	19.38	3623.65	21.47	288.43	2.09
极重度	8728.9	50.71	6891.77	40.83	-1837.13	-9.88

Tab.3

Fig.3

Dynamic condition ofdesertification land and sandification land severity index,2014—2019

Fig.3

References 5

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[2]	屠志方, 李梦先, 孙涛. 第五次全国荒漠化和沙化监测结果及分析[J]. 林业资源管理, 2016(1):1-5.
[3]	王君厚. 近50年来我国沙化土地动态变化分析[J]. 林业资源管理, 2008(2):23-27.
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