Chin J Plant Ecol ›› 2018, Vol. 42 ›› Issue (6): 640-652.DOI: 10.17521/cjpe.2017.0240
Special Issue: 生态遥感及应用
• Research Articles • Previous Articles Next Articles
WANG Xing,GONG Zhao-Ning(),JING Ran,ZHANG Lei,JIN Dian-Dian
Received:
2017-09-13
Revised:
2018-04-04
Online:
2018-06-20
Published:
2018-06-20
Contact:
Zhao-Ning GONG
Supported by:
WANG Xing, GONG Zhao-Ning, JING Ran, ZHANG Lei, JIN Dian-Dian. Extraction of aquatic plants based on continuous removal method and analysis of its temporal and spatial changes—A case study of Guanting Reservoir[J]. Chin J Plant Ecol, 2018, 42(6): 640-652.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2017.0240
植物类型 Vegetation types | 典型湿地植物 Typical wetland plant | 光谱数 Number of spectrum |
---|---|---|
沉水植物 Submerged plants | 篦齿眼子菜 Potamogeton pectinatus | 9 |
穗状狐尾藻 Myriophyllum spicatum | 8 | |
狸藻 Utricularia vulgaris | 3 | |
浮水植物 Floating plants | 两栖蓼 Polygonum amphibium | 20 |
挺水植物 Emergent plants | 芦苇 Phragmites australis | 10 |
香蒲 Typha angustifolia | 10 |
Table 1 Wetland vegetation types and spectra numbers of Guanting Reservoir
植物类型 Vegetation types | 典型湿地植物 Typical wetland plant | 光谱数 Number of spectrum |
---|---|---|
沉水植物 Submerged plants | 篦齿眼子菜 Potamogeton pectinatus | 9 |
穗状狐尾藻 Myriophyllum spicatum | 8 | |
狸藻 Utricularia vulgaris | 3 | |
浮水植物 Floating plants | 两栖蓼 Polygonum amphibium | 20 |
挺水植物 Emergent plants | 芦苇 Phragmites australis | 10 |
香蒲 Typha angustifolia | 10 |
波段名称 Band names | 波长 Wavelength (μm) | 空间分辨率 Spatial resolution (m) |
---|---|---|
海岸 Coastal | 0.433-0.453 | 30 |
蓝 Blue | 0.450-0.515 | 30 |
绿 Green | 0.525-0.600 | 30 |
红 Red | 0.630-0.680 | 30 |
近红外 NIR | 0.845-0.885 | 30 |
短波红外1 SWIR1 | 1.560-1.660 | 30 |
短波红外2 SWIR2 | 2.100-2.300 | 30 |
全色 Pan | 0.500-0.680 | 15 |
卷云 Cirrus | 1.360-1.390 | 30 |
Table 2 Spectral bands setting of Landsat 8 OLI
波段名称 Band names | 波长 Wavelength (μm) | 空间分辨率 Spatial resolution (m) |
---|---|---|
海岸 Coastal | 0.433-0.453 | 30 |
蓝 Blue | 0.450-0.515 | 30 |
绿 Green | 0.525-0.600 | 30 |
红 Red | 0.630-0.680 | 30 |
近红外 NIR | 0.845-0.885 | 30 |
短波红外1 SWIR1 | 1.560-1.660 | 30 |
短波红外2 SWIR2 | 2.100-2.300 | 30 |
全色 Pan | 0.500-0.680 | 15 |
卷云 Cirrus | 1.360-1.390 | 30 |
Fig. 2 A, Measured water sample spectral curve. B, Typical representative submerged plants, floating plants, emergent plants, and waters comparison of sample points spectrum curves. C, Guanting Reservoir typical aquatic plant species spectral curve. D, Aquatic plant spectrum resampling results.
植物类型 Vegetation type | 光谱数 Number of spectra | Blue处吸收深度平均值 Blue absorption depth average | Red处吸收深度平均值 Red absorption depth average | SWIR1处吸收深度平均值 SWIR1 absorption depth average |
---|---|---|---|---|
沉水植物 Submerged plants | 20 | 0.3202 | 0.3579 | 0.7977 |
浮水植物 Floating plants plants | 20 | 0.5955 | 0.7740 | 0.2167 |
挺水植物 Emergent plants | 20 | 0.7272 | 0.8466 | 0.3542 |
Table 3 Statistics of parameters of absorption characteristic in 3 types of wetland vegetation types in Guanting Reservoir
植物类型 Vegetation type | 光谱数 Number of spectra | Blue处吸收深度平均值 Blue absorption depth average | Red处吸收深度平均值 Red absorption depth average | SWIR1处吸收深度平均值 SWIR1 absorption depth average |
---|---|---|---|---|
沉水植物 Submerged plants | 20 | 0.3202 | 0.3579 | 0.7977 |
浮水植物 Floating plants plants | 20 | 0.5955 | 0.7740 | 0.2167 |
挺水植物 Emergent plants | 20 | 0.7272 | 0.8466 | 0.3542 |
Fig. 6 The results of histogram of the gray histogram of different types of aquatic plants. A, Normalized differential vegetation index (NDVI) grey image. B, Short wave infrared 1 band, which was processed by continuum removal (SWIR1CR) grey image.
Fig. 7 Time series curves of normalized differential vegetation index (NDVI)(A) and short wave infrared 1 band, which was processed by continuum removal (SWIR1CR)(B) for three types of aquatic plants in multitemporal remote sensing images.
地物类型 Category | 水体 Water body | 沉水植物 Submerged plants | 浮水植物 Floating plants | 挺水植物 Emergent plants |
---|---|---|---|---|
水体 Water body | 820 | 312 | 186 | 15 |
沉水植物 Submerged plants | 47 | 2969 | 9 | 86 |
浮水植物 Floating plants | 11 | 0 | 76 | 8 |
挺水植物 Emergent plants | 39 | 14 | 1 | 731 |
总体精度 Overall accuracy | 86.33% | Kappa系数 Kappa coefficient | 0.76 |
Table 4 Classification accuracy test
地物类型 Category | 水体 Water body | 沉水植物 Submerged plants | 浮水植物 Floating plants | 挺水植物 Emergent plants |
---|---|---|---|---|
水体 Water body | 820 | 312 | 186 | 15 |
沉水植物 Submerged plants | 47 | 2969 | 9 | 86 |
浮水植物 Floating plants | 11 | 0 | 76 | 8 |
挺水植物 Emergent plants | 39 | 14 | 1 | 731 |
总体精度 Overall accuracy | 86.33% | Kappa系数 Kappa coefficient | 0.76 |
Fig. 8 The WorldView_2 image of the reservoir area and the display of local aquatic plant image features. A, Emergent plants. B, Submerged plants. C, Floating plants.
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