Table 6.

The percent of HUC8s across the study area that showed a significant relationship (p<0.05) between surface-water extent and (1) precipitation (Precip or P) or (2) precipitation minus potential evapotranspiration (PET) for different accumulation periods.

Accumulated Period	Precip DCW (%)	P - PET DCW (%)	Inclusion of PET change (DCW)	Precip CCW (%)	P - PET CCW (%)	Inclusion of PET change (CCW)
3 months	19.4	27.1	7.6	15.3	28.5	13.2
6 months	5.6	31.9	26.4	9.0	33.3	24.3
9 months	20.8	59.7	38.9	27.1	48.6	21.5
12 months	45.8	50.7	4.9	42.4	41.0	−1.4
18 months	24.3	58.3	34.0	25.7	39.6	13.9
24 months	52.1	50.7	−1.4	43.8	37.5	−6.3
30 months	28.5	55.6	27.1	27.1	43.1	16.0
36 months	54.9	54.9	0.0	47.2	44.4	−2.8
HUC8s with a sig relationship in at least 1 time period	65.3	75.7	10.4	59.0	67.4	8.3

DCW: disconnected surface water; CCW: continuously, connected surface water.