Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (4): 31-40.DOI: 10.7522/j.issn.1000-694X.2022.00166
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Yaozong Wang1,2(), Xinbin Yue1, Jiali Xie3,4(
), Zhipeng Liu1, Yuan Ma1, Yahui Wang3,4, Yan Gong1
Received:
2022-11-08
Revised:
2022-12-12
Online:
2023-07-20
Published:
2023-08-14
Contact:
Jiali Xie
CLC Number:
Yaozong Wang, Xinbin Yue, Jiali Xie, Zhipeng Liu, Yuan Ma, Yahui Wang, Yan Gong. Desertification evolution in the sandy region to the east of the Yellow River in Ningxia from 2000 to 2020[J]. Journal of Desert Research, 2023, 43(4): 31-40.
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URL: http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2022.00166
轨道号 | 主影像时相 | 参考影像时相 | 轨道号 | 主影像时相 | 参考影像时相 |
---|---|---|---|---|---|
129033 | 20000830 | 20000915,20000713 | 129034 | 20000830 | 20000915,20000713 |
20050804 | 20051007,20060807 | 20050804 | 20051007,20060807 | ||
20100818 | 20100701,20100903 | 20100717 | 20100802,20100903 | ||
20150731 | 20150901,20150715 | 20150731 | 20150901,20150715 | ||
20200728 | 20200813,20200626 | 20200728 | 20200626,20210731 |
Table 1 Image time table
轨道号 | 主影像时相 | 参考影像时相 | 轨道号 | 主影像时相 | 参考影像时相 |
---|---|---|---|---|---|
129033 | 20000830 | 20000915,20000713 | 129034 | 20000830 | 20000915,20000713 |
20050804 | 20051007,20060807 | 20050804 | 20051007,20060807 | ||
20100818 | 20100701,20100903 | 20100717 | 20100802,20100903 | ||
20150731 | 20150901,20150715 | 20150731 | 20150901,20150715 | ||
20200728 | 20200813,20200626 | 20200728 | 20200626,20210731 |
沙漠化 程度 | 流沙面积 占比/% | 植被覆盖度 /% | 景观特征 |
---|---|---|---|
轻度C1 | <5 | >60 | 固定沙丘迎风坡出现风蚀坑,流沙斑点状分布,灌丛下出现流沙堆积,并形成各种形态的沙嘴,春季垄沟有少量积沙,耕垄有明显的风蚀痕迹 |
中度C2 | 5~25 | 30~60 | 地面以片状风蚀为主,沙丘出现明显的风蚀坡和落沙坡分布,灌丛有叶期仍不能覆盖整个沙堆,灌丛沙堆迎风侧显现流沙,耕地出现明显小片流沙 |
重度C3 | 25~50 | 10~30 | 原始地表形态基本破坏,地表风蚀强烈,沙地成为半流动状态,灌丛开始大片死亡,风蚀耕地腐殖质层几乎蚀净,耕地大部分弃耕 |
极重度C4 | >50 | <10 | 流动沙丘和风蚀劣地大面积分布,几乎无植被或有少量植被覆盖 |
Table 2 Grading standard of land desertification degree
沙漠化 程度 | 流沙面积 占比/% | 植被覆盖度 /% | 景观特征 |
---|---|---|---|
轻度C1 | <5 | >60 | 固定沙丘迎风坡出现风蚀坑,流沙斑点状分布,灌丛下出现流沙堆积,并形成各种形态的沙嘴,春季垄沟有少量积沙,耕垄有明显的风蚀痕迹 |
中度C2 | 5~25 | 30~60 | 地面以片状风蚀为主,沙丘出现明显的风蚀坡和落沙坡分布,灌丛有叶期仍不能覆盖整个沙堆,灌丛沙堆迎风侧显现流沙,耕地出现明显小片流沙 |
重度C3 | 25~50 | 10~30 | 原始地表形态基本破坏,地表风蚀强烈,沙地成为半流动状态,灌丛开始大片死亡,风蚀耕地腐殖质层几乎蚀净,耕地大部分弃耕 |
极重度C4 | >50 | <10 | 流动沙丘和风蚀劣地大面积分布,几乎无植被或有少量植被覆盖 |
沙漠化 演变 | Slope真实NDVI | Slope预测NDVI | Slope残差NDVI | 原因 |
---|---|---|---|---|
沙漠化 逆转 | >0 | <0 | >0 | 人类活动 |
>0 | >0 | 人类活动和气候变化 | ||
>0 | <0 | 气候变化 | ||
沙漠化 发展 | <0 | <0 | <0 | 人类活动和气候变化 |
>0 | <0 | 人类活动 | ||
<0 | >0 | 气候变化 |
Table 3 Evaluation basis for driving factors of desertification evolution
沙漠化 演变 | Slope真实NDVI | Slope预测NDVI | Slope残差NDVI | 原因 |
---|---|---|---|---|
沙漠化 逆转 | >0 | <0 | >0 | 人类活动 |
>0 | >0 | 人类活动和气候变化 | ||
>0 | <0 | 气候变化 | ||
沙漠化 发展 | <0 | <0 | <0 | 人类活动和气候变化 |
>0 | <0 | 人类活动 | ||
<0 | >0 | 气候变化 |
阶段 | 沙漠化类型 | 轻度沙漠化 | 中度沙漠化 | 重度沙漠化 | 极重度沙漠化 |
---|---|---|---|---|---|
2000—2005年 | 轻度沙漠化 | 1 392.94 | 5.11 | 0.00 | 0.53 |
中度沙漠化 | 24.57 | 1 075.30 | 0.00 | 2.13 | |
重度沙漠化 | 10.36 | 42.29 | 614.66 | 10.16 | |
极重度沙漠化 | 6.02 | 70.64 | 215.06 | 934.82 | |
2005—2010年 | 轻度沙漠化 | 1 388.92 | 0.37 | 6.16 | 0.07 |
中度沙漠化 | 109.14 | 1 056.19 | 2.71 | 6.45 | |
重度沙漠化 | 28.20 | 80.91 | 682.32 | 5.13 | |
极重度沙漠化 | 9.95 | 49.00 | 194.64 | 688.80 | |
2010—2015年 | 轻度沙漠化 | 1 523.07 | 0.00 | 0.47 | 6.62 |
中度沙漠化 | 27.81 | 1 141.00 | 0.79 | 9.38 | |
重度沙漠化 | 16.29 | 57.22 | 782.28 | 4.66 | |
极重度沙漠化 | 38.02 | 24.28 | 73.61 | 541.53 | |
2015—2020 | 轻度沙漠化 | 1 564.08 | 3.79 | 5.95 | 2.09 |
中度沙漠化 | 17.72 | 1 180.76 | 2.59 | 0.41 | |
重度沙漠化 | 1.09 | 22.34 | 825.69 | 2.82 | |
极重度沙漠化 | 0.00 | 8.28 | 56.90 | 460.98 | |
2000—2020年 | 轻度沙漠化 | 1 302.53 | 10.50 | 8.47 | 7.31 |
中度沙漠化 | 151.86 | 886.56 | 8.18 | 8.66 | |
重度沙漠化 | 52.42 | 102.74 | 452.84 | 4.15 | |
极重度沙漠化 | 73.85 | 214.73 | 416.09 | 442.78 |
Table 4 Transfer matrix of desertified land from 2000 to 2020 in the sandy region to the east of the Yellow River in Ningxia (km2 )
阶段 | 沙漠化类型 | 轻度沙漠化 | 中度沙漠化 | 重度沙漠化 | 极重度沙漠化 |
---|---|---|---|---|---|
2000—2005年 | 轻度沙漠化 | 1 392.94 | 5.11 | 0.00 | 0.53 |
中度沙漠化 | 24.57 | 1 075.30 | 0.00 | 2.13 | |
重度沙漠化 | 10.36 | 42.29 | 614.66 | 10.16 | |
极重度沙漠化 | 6.02 | 70.64 | 215.06 | 934.82 | |
2005—2010年 | 轻度沙漠化 | 1 388.92 | 0.37 | 6.16 | 0.07 |
中度沙漠化 | 109.14 | 1 056.19 | 2.71 | 6.45 | |
重度沙漠化 | 28.20 | 80.91 | 682.32 | 5.13 | |
极重度沙漠化 | 9.95 | 49.00 | 194.64 | 688.80 | |
2010—2015年 | 轻度沙漠化 | 1 523.07 | 0.00 | 0.47 | 6.62 |
中度沙漠化 | 27.81 | 1 141.00 | 0.79 | 9.38 | |
重度沙漠化 | 16.29 | 57.22 | 782.28 | 4.66 | |
极重度沙漠化 | 38.02 | 24.28 | 73.61 | 541.53 | |
2015—2020 | 轻度沙漠化 | 1 564.08 | 3.79 | 5.95 | 2.09 |
中度沙漠化 | 17.72 | 1 180.76 | 2.59 | 0.41 | |
重度沙漠化 | 1.09 | 22.34 | 825.69 | 2.82 | |
极重度沙漠化 | 0.00 | 8.28 | 56.90 | 460.98 | |
2000—2020年 | 轻度沙漠化 | 1 302.53 | 10.50 | 8.47 | 7.31 |
中度沙漠化 | 151.86 | 886.56 | 8.18 | 8.66 | |
重度沙漠化 | 52.42 | 102.74 | 452.84 | 4.15 | |
极重度沙漠化 | 73.85 | 214.73 | 416.09 | 442.78 |
Fig.3 Distribution of desertification in 2020 and change of center of gravity migration in different periods in the sandy region to the east of the Yellow River in Ningxia
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