Table 3.

Pearson correlation coefficients of percent soil moisture within one meter of canal edge and corresponding cottonwood leaf predawn water potentials (Ψpd) taken within 24 hours of soil moisture readings in 2001–2003 along the High Line Canal, Denver, Colorado, U.S. Hyphen (−) = data not collected; bold = depth where canal flow was assumed to influence soil moisture (see Methods section for details); asterisk (*) = significant at P < 0.05.

Canal section	Year	Site	Depth
Canal section	Year	Site	0.3 m	0.9 m	1.5 m	2.1 m	2.7 m
Sand Creek	2001	2	0.13	0.51*	0.63*	0.39*	0.23
		16	0.15	0.19	0.09	0.08	0.06
		23	0.41*	0.48*	0.58*	0.46*	0.42*
		25	0.54*	0.63*	0.83*	0.18	0.16
		17	0.22	0.41*	0.52*	0.19	0.21
Toll Gate Creek	2001	6	0.09	0.39*	0.29	0.18	0.16
		19	-	-	-	-	-
		20	0.22	0.24	0.39*	0.32	0.20
Sand Creek	2002	2	0.09	0.17	0.07	0.08	0.19
		16	0.37*	0.16	0.04	0.06	0.03
		23	0.47*	0.08	0.09	0.09	0.11
		25	0.43*	0.03	0.24	0.10	0.01
		17	0.05	0.10	0.25	0.08	0.11
Toll Gate Creek	2002	6	0.34*	0.34*	0.10	0.19	0.28*
		19	0.01	0.01	0.03	0.04	0.08
		20	0.59*	0.16	0.32*	0.36*	0.45*
Sand Creek	2003	2	0.01	0.07	0.01	0.06	0.15
		16	0.04	0.06	0.01	0.02	0.06
		23	0.12	0.09	0.11	0.03	0.02
		25	0.06	0.37	0.55*	0.46*	0.06
		17	0.26	0.19	0.14	0.41	0.07
Toll Gate Creek	2003	6	0.15	0.21	0.16	0.03	0.17
		19	0.29	0.31*	0.45*	0.34*	0.40*
		20	0.11	0.16	0.23	0.10	0.04