古尔班通古特沙漠灌木冠幅预测模型

王明娜, 张定海, 张志山, 路丽宁

Canopy width prediction models for the Gurbantunggut Desert

Mingna Wang, Dinghai Zhang, Zhishan Zhang, Lining Lu

表3 3种沙丘上主要固沙灌木的冠幅预测模型拟合结果

Table 3 Fitting results of crown width prediction model for three main sand-fixing shrubs on sand dunes

沙丘类型	模型	参数					评价指标				模型检验 P
沙丘类型	模型	a	b	c	d	e	R²	RMSE	MAE	MAPE/%	模型检验 P
固定沙丘	M1	-0.090	0.736	11.580			0.793	0.216	0.001	23.91	<0.001
	M2	-0.223	0.717	28.580	0.017	-90.970	0.838	0.192	0.001	24.90	<0.001
	M3	0.527	1.344	0.211	0.680		0.812	0.206	0.132	37.48	<0.001
	M6	2.228	23.370	1.767	68.660		0.817	0.203	0.124	34.21	<0.001
	M7	2.563	4.213	0.928	33.120		0.816	0.204	0.117	25.54	<0.001
	M10	445.100	0.002	0.016			0.782	0.222	0.140	36.42	<0.001
半固定沙丘	M1	-0.278	0.818	35.430			0.886	0.144	0.092	44.82	<0.001
	M2	-0.458	1.119	53.070	-0.131	-619.700	0.916	0.124	0.090	62.19	<0.001
	M6	1.686	47.560	3.656	109.800		0.892	0.141	0.082	42.73	<0.001
	M7	1.924	5.998	1.786	58.250		0.905	0.132	0.073	25.51	<0.001
	M12	0.484	0.571	-9.855			0.896	0.138	0.127	86.48	<0.001
流动沙丘	M1	-0.280	0.836	33.710			0.714	0.288	0.179	38.26	<0.001
	M2	-0.663	1.689	49.570	-0.410	-295.500	0.811	0.234	0.152	75.29	<0.001
	M3	0.679	0.935	43.210	1.162		0.669	0.310	0.225	76.95	<0.001
	M6	1.849	39.620	2.880	101.600		0.748	0.270	0.166	37.89	<0.001
	M7	2.051	6.202	1.583	58.010		0.748	0.271	0.162	29.08	<0.001