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Table 1

Water storage anomaly GLM summary

	Sand dam indicator variable (SD)
Model	Coefficient	Standard error	t-statistic	p-value	Model adjusted R²
January	−0.043	0.02	−2.26	0.025*	0.68
February	−0.003	0.02	−0.18	0.858	0.43
March	0.019	0.01	1.50	0.134	0.61
April	0.046	0.02	2.10	0.037*	0.76
May	0.027	0.01	1.85	0.066	0.79
June	−0.005	0.01	−0.31	0.754	0.75
July	0.005	0.01	0.34	0.731	0.73
August	−0.020	0.01	−1.37	0.171	0.69
September	−0.001	0.01	−0.08	0.937	0.76
October	0.006	0.01	0.57	0.570	0.79
November	0.036	0.01	2.45	0.015*	0.83
December	−0.005	0.02	−0.21	0.836	0.62

	Sand dam indicator variable (SD)
Model	Coefficient	Standard error	t-statistic	p-value	Model adjusted R²
January	−0.043	0.02	−2.26	0.025*	0.68
February	−0.003	0.02	−0.18	0.858	0.43
March	0.019	0.01	1.50	0.134	0.61
April	0.046	0.02	2.10	0.037*	0.76
May	0.027	0.01	1.85	0.066	0.79
June	−0.005	0.01	−0.31	0.754	0.75
July	0.005	0.01	0.34	0.731	0.73
August	−0.020	0.01	−1.37	0.171	0.69
September	−0.001	0.01	−0.08	0.937	0.76
October	0.006	0.01	0.57	0.570	0.79
November	0.036	0.01	2.45	0.015*	0.83
December	−0.005	0.02	−0.21	0.836	0.62

*Significance at p < 0.05.