基于多光谱遥感的盐渍化评价指数对宁夏银北灌区土壤盐度预测的适用性分析

吴霞, 王长军, 樊丽琴, 李磊

An applicability analysis of salinization evaluation index based on multispectral remote sensing to soil salinity prediction in Yinbei irrigation area of Ningxia

WU Xia, WANG Zhangjun, FAN Liqin, LI Lei

表4 盐渍化评价指数与全样本土壤EC之间的曲线拟合结果

Tab.4 Curve fitting results between salinization evaluation index and soil EC(Full sample)

模型 NDSI S1 S2 S3 S5 S6 SI R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) 线性函数 0.036 0.729 0.215 0.657 0.199 0.664 0.335 0.605 0.272 0.633 0.257 0.640 0.268 0.635 对数函数 0.195 1.055 0.215 1.541 0.216 1.547 0.172 1.389 0.216 1.545 逆模型 0.025 0.733 0.175 0.674 0.298 0.622 0.089 0.708 0.161 0.680 0.082 0.711 0.163 0.679 二次函数 0.036 0.729 0.293 0.624 0.278 0.631 0.367 0.591 0.346 0.600 0.290 0.625 0.337 0.604 三次函数 0.036 0.729 0.304 0.619 0.327 0.609 0.395 0.577 0.406 0.572 0.319 0.612 0.382 0.583 复合函数 0.095 0.761 0.129 0.720 0.122 0.726 0.293 0.610 0.292 0.652 0.246 0.668 0.288 0.658 幂函数 0.121 0.728 0.261 0.694 0.264 0.691 0.211 0.718 0.262 0.693 S函数 0.063 0.765 0.112 0.734 0.168 0.670 0.156 0.747 0.225 0.744 0.138 0.750 0.225 0.719 增长函数 0.095 0.761 0.129 0.720 0.122 0.726 0.293 0.610 0.292 0.652 0.246 0.668 0.288 0.658 指数函数 0.095 0.761 0.129 0.720 0.122 0.726 0.293 0.610 0.292 0.652 0.246 0.668 0.288 0.658 逻辑函数 0.095 0.761 0.129 0.720 0.122 0.726 0.293 0.610 0.292 0.652 0.246 0.668 0.288 0.658 模型 SI1 SI2 SI3 Int1 Int2 NDVI ENDVI R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) 线性函数 0.218 0.656 0.180 0.672 0.210 0.659 0.214 0.658 0.193 0.667 0.036 0.729 0.135 0.690 对数函数 0.181 1.400 0.153 1.028 0.175 1.188 0.178 1.389 0.163 1.130 0.032 0.788 0.150 1.433 模型 SI1 SI2 SI3 Int1 Int2 NDVI ENDVI R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) 逆模型 0.142 0.687 0.125 0.694 0.138 0.689 0.140 0.688 0.133 0.691 0.025 0.733 0.165 0.678 二次函数 0.269 0.635 0.233 0.650 0.259 0.639 0.264 0.637 0.252 0.642 0.036 0.728 0.205 0.662 三次函数 0.292 0.625 0.257 0.640 0.281 0.629 0.286 0.627 0.277 0.631 0.036 0.728 0.205 0.662 复合函数 0.255 0.690 0.192 0.718 0.250 0.694 0.252 0.692 0.212 0.710 0.095 0.761 0.161 0.730 幂函数 0.235 0.711 0.178 0.729 0.231 0.713 0.233 0.712 0.196 0.723 0.082 0.762 0.171 0.722 S函数 0.207 0.728 0.159 0.738 0.204 0.729 0.205 0.729 0.175 0.735 0.063 0.765 0.182 0.714 增长函数 0.255 0.690 0.192 0.718 0.250 0.694 0.252 0.692 0.212 0.710 0.095 0.710 0.161 0.730 指数函数 0.255 0.690 0.192 0.718 0.250 0.694 0.252 0.692 0.212 0.710 0.095 0.710 0.161 0.730 逻辑函数 0.255 0.690 0.192 0.718 0.250 0.694 0.252 0.692 0.212 0.710 0.095 0.710 0.161 0.730 模型 EVI EEVI COSRI CRSI GDVI SDI R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) R2 RMSE/ (mS·cm-1) 线性函数 0.110 0.699 0.131 0.692 0.009 0.739 0.199 0.664 0.095 0.706 0.055 0.722 对数函数 0.100 1.611 0.119 1.142 0.006 0.770 0.221 0.895 0.114 0.912 0.053 0.753 逆模型 0.070 0.716 0.108 0.701 0.003 0.741 0.245 0.645 0.140 0.688 0.051 0.723 二次函数 0.110 0.699 0.207 0.661 0.014 0.737 0.284 0.628 0.114 0.699 0.058 0.720 三次函数 0.210 0.660 0.213 0.658 0.015 0.769 0.284 0.628 0.186 0.670 0.059 0.720 复合函数 0.050 0.757 0.078 0.749 0.051 0.769 0.169 0.709 0.135 0.744 0.118 0.754 幂函数 0.050 0.758 0.076 0.751 0.044 0.770 0.176 0.698 0.136 0.737 0.118 0.755 S函数 0.040 0.761 0.073 0.752 0.034 0.772 0.183 0.684 0.138 0.728 0.117 0.756 增长函数 0.050 0.757 0.078 0.749 0.051 0.769 0.169 0.709 0.135 0.744 0.118 0.754 指数函数 0.050 0.757 0.078 0.749 0.051 0.769 0.169 0.709 0.135 0.744 0.118 0.754 逻辑函数 0.050 0.757 0.078 0.749 0.051 0.769 0.169 0.709 0.135 0.744 0.118 0.754