再生水补给河道内芦苇的光谱特征及其对水体氮和磷含量的响应
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赵睿, 卜红梅, 宋献方, 高融瑾
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Spectral Characteristics of Phragmites australis and Its Response to Riverine Nitrogen and Phosphorus Contents in River Reaches Restored by Reclaimed Water
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Rui Zhao, Hongmei Bu, Xianfang Song, Rongjin Gao
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表1 芦苇叶片光谱指数与水体总氮(TN)含量的拟合模型
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Table 1 Fitting models between spectral indexes of Phragmites australis leaves and riverine total nitrogen (TN) contents
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| Spectral indexes and expressions | Model types | Fitting equations | Adjusted R2 | PRI
(R531-R570)/(R531+R570) | Linear equation | y=5.243x+5.685 | 0.042 | | Exponential equation | y=6.914e1.102x | 0.693* | | Quadratic equation | y=1.254x2+0.489x-0.156 | 0.219 | | Logarithmic equation | y=0.492lnx-0.641 | 0.038 | MCARI
[(R700-R670)-0.2(R700-R550)] (R700/R670) | Linear equation | y=-3.122x+7.396 | 0.119 | | Exponential equation | y=8.854e-0.105x | 0.709* | | Quadratic equation | y=-0.595x2+1.821x+2.608 | 0.426 | | Logarithmic equation | y=-0.567lnx+1.614 | 0.092 | NPCI
(R680-R430)/(R680+R430) | Linear equation | y=4.915x+7.725 | 0.110 | | Exponential equation | y=9.940e0.008x | 0.507 | | Quadratic equation | y=1.285x2+0.518x-0.087 | 0.209 | | Logarithmic equation | y=1.043lnx+0.168 | 0.093 | DCI
D725/D705 | Linear equation | y=2.485x+3.498 | 0.038 | | Exponential equation | y=5.197e0.164x | 0.624* | | Quadratic equation | y=2.703x2-3.752x+1.854 | 0.478 | | Logarithmic equation | y=2.07lnx-1.019 | 0.096 |
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