Table 5.

Percent of sites with substantial^{^z} increases in predawn leaf water potentials (ψpd) of plains cottonwood trees along the High Line Canal, Denver, Colorado, U.S., after large precipitation events^{^y}, 2001–2008^{^x}, NOAA, Meteorological Station, Denver Stapleton, #0522220.

Year	Number of sites	Precip events > 25 mm^{^y}	Percent of events with substantial ψpd increase^{^z} (%)	Duration of water potential increase (days)
2001	8	6	27	7
2002	9	1	67	n/a^{^w}
2003	13	2	4	7
2004	12	1	0	-
2005	12	1	42	7
2006	14	3	36	7
2007	13	1	0	-
2008	14	2	0	-

↵^z ψpd were increased (>0.10MPa) after reaching at least −0.30 MPa.
↵^y Precipitation events that increased ψpd by 0.1 MPA were only those greater than 25 mm.
↵^x Data on precipitation and corresponding ψpd not available for 1998–2000.
↵^w ψpd data were not available.