科尔沁沙丘草甸相间地区土地利用与覆被识别

doi:10.13866/j.azr.2021.02.24

Abstract

Abstract:

In this study, we determine land use/land cover (LULC) types using only optical remote sensing data in a dune-meadow area of Horqin Sandy Land in northeast China. We used 64 Sentinel-2 remote sensing images from 2018. An LULC decision tree recognition rule was established by combining image segmentation technology, vegetation phenology information, and habitat characteristics. The overall classification accuracy was 0.91, and the Kappa coefficient was 0.89. The classification results show that most of the study region was dryland area, accounting for 33.79%, followed by shrub communities at 25.03%. High-diversity semi-shrub communities and arbor forests accounted for 14.54% and 10%, respectively, while low-diversity semi-shrub communities, meadowlands, and mobile sand lands account for about 5% each. The total proportion of other LULC types was less than 5%. The results show that this interpretation method better reflects the spatial distribution of the LULC while also providing growth and development data for different cover types. These data can be used to study material cycles and provide threshold references for historical LULC identification of Horqin Sandy Land.

Key words: remote sensing, land use/land cover, multi-resolution segmenation, decision-trees, classification, Sentinel 2-A/B, time series, Horqin Sandy Land

CAO Wenmei,LIU Tingxi,WANG Xixi,WANG Guanli,LI Dongfang,TONG Xing. Land use and land cover classifications of Horqin Sandy Land dune-meadow areas[J].Arid Zone Research, 2021, 38(2): 526-535.

Figures/Tables 9

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References 34

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土地利用/覆被类型	优势物种	调查点/个	植被种类（类）	地上单位面积生物量/（g·m^-2）	Shannon多样性指数（H）	验证样本
草甸地	芦苇、苔草	6	9.17±4.95	438.65±340.23	1.51±0.68	125
流动沙地	沙米、差巴嘎蒿	5	6.33±1.6	107.35±58.08	1.09±0.31	55
低多样性半灌木群落	差巴嘎蒿	4	9.25±1.09	122.55±77.17	1.66±0.10	75
高多样性半灌木群落	冷蒿、麻黄、冰草	7	13.67±2.92	229.32±155.94	1.99±0.13	110
灌木群落	小叶锦鸡儿	16	13.88±4.57	1292.5±1367.16	1.81±0.25	130
乔木林	杨树	6	-	-	-	70
旱地	玉米	7	-	-	-	185
水田	水稻	3	-	-	-	25

	乔木林	灌木群落	低多样性半灌木群落	高多样性半灌木群落	草甸地	旱地	水田	流动沙地	水域	居民用地	用户精度
乔木林	60	0	0	0	25	0	0	0	0	0	0.71
灌木群落	10	130	0	28	0	10	0	0	0	0	0.73
低多样性半灌木群落	0	0	65	0	0	0	0	0	0	0	1
高多样性半灌木群落	0	0	5	82	0	0	0	0	0	0	0.94
草甸地	0	0	0	0	100	0	0	0	0	0	1
旱地	0	0	0	0	0	175	0	0	0	0	1
水田	0	0	0	0	0	0	25	0	0	0	1
流动沙地	0	0	5	0	0	0	0	55	0	0	0.92
水域	0	0	0	0	0	0	0	0	50	0	1
居民用地	0	0	0	0	0	0	0	0	0	75	1
制图精度	0.86	1	0.87	0.75	0.8	0.95	1	1	1	1
总体分类精度	0.91
Kappa系数	0.89

Land use and land cover classifications of Horqin Sandy Land dune-meadow areas

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