Table 2 Relationship between the peak values of fluorescence and the land use/cover types under different water radii of action.

Radius	components	Urban land	Water body	Cropland	Forest-grassland	Salinized land	Other land	Desert
100 m	C1	−0.088	−0.108	−0.204	−0.125	0.555^**	−0.075	−0.062
	W2	0.019	0.177	0.03	−0.05	−0.413	0.008	−0.057
	W3	−0.06	0.262	−0.07	−0.003	−0.281	0.001	0.006
	W5	0.001	0.038	−0.063	−0.004	−0.187	0.147	−0.087
	W7	−0.087	−0.111	−0.211	−0.118	0.548^**	−0.071	−0.053
200 m	C1	0.959^**	−0.1	−0.246	−0.108	0.582^**	−0.169	0.272
	W2	−0.345^*	0.124	0.224	−0.068	−0.214	0.011	−0.044
	W3	−0.307^*	0.194	0.15	−0.042	−0.3	0.068	−0.11
	W5	−0.194	−0.054	0.135	−0.039	−0.185	0.147	−0.073
	W7	0.932^**	−0.104	−0.25	−0.099	0.571^**	−0.164	0.275
300 m	C1	−0.085	−0.075	−0.287	−0.15	0.587^**	−0.039	0.257
	W2	0.1	0.131	0.237	−0.098	−0.214	−0.049	−0.118
	W3	0.026	0.152	0.224	−0.064	−0.317	0.017	−0.159
	W5	0.111	−0.066	0.124	−0.065	−0.193	0.103	−0.116
	W7	−0.082	−0.079	−0.289	−0.146	0.575^**	−0.032	0.255
400 m	C1	−0.108	−0.063	−0.265	0.127	0.535**	−0.146	0.238
	W2	0.182	0.145	0.201	−0.163	−0.209	−0.042	−0.17
	W3	0.084	0.11	0.191	−0.177	−0.339	0.109	−0.194
	W5	0.206	−0.061	0.107	−0.071	−0.209	0.081	−0.143
	W7	−0.103	−0.066	−0.267	0.129	0.524**	−0.138	0.237
500 m	C1	0.771**	−0.461**	−0.303	0.566**	0.510*	−0.549*	−0.109
	W2	0.482	0.336	0.666**	−0.125	−0.094	0.536*	0.208
	W3	−0.226	0.237	0.319	−0.133	−0.145	0.143	0.288
	W5	−0.023	0.012	0.338	−0.081	−0.198	0.041	−0.095
	W7	0.771**	−0.164	0.021	−0.017	−0.205	−0.242	−0.527**

**Correlation is significant at the 0.01 level. *Correlation is significant at the 0.05 level.

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