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Forest Harvesting Influence on Water Table Dynamics in a Florida Flatwoods Landscape

Soil and Water Science Dep., Univ. of Florida, 2169 McCarty Hall, P.O. Box 110290, Gainesville, FL 32611-0290

View larger version (26K): [in a new window]   Fig. 1. Rainfall for the entire study period. Each bar represents accumulation from the previous measurement date (2 wk intervals).

View larger version (50K): [in a new window]   Fig. 2. Map of the study site with water-table wells and cypress swamps marked. The location of cypress swamps roughly corresponds with location of hydric soils; outside the swamps tend to be nonhydric soils.

View larger version (26K): [in a new window]   Fig. 3. Average water table depth at each 2-wk collection date for the control block (both hydric and nonhydric soils) for the entire study period. The arrow indicates when harvest occurred. Breaks in the hydroperiod line represent times when the water table was below the depth of the water table wells.

View larger version (52K): [in a new window]   Fig. 4. Differences between observed minus predicted water-table levels over time following harvesting (June 1994–March 1998) for the clear-cut block. The upper line represents the hydric soils and the lower line represents the nonhydric soils. Grey shaded areas indicate the growing season. Dates significantly different from zero are indicated by an ‘*’. Missing data indicate dry wells.

View larger version (51K): [in a new window]   Fig. 5. Differences between observed minus predicted water-table levels over time following harvesting (June 1994–March 1998) for the cypress-cut block. The upper line represents the hydric soils and the lower line represents the nonhydric soils. Grey shaded areas indicate the growing season. Dates significantly different from zero are indicated by an ‘*’. Missing data indicate dry wells.