Groundwater Hydrology

Poster Abstract

Investigation of the Impacts of Local-scale Hydrogeological Conditions on Sinkhole Occurrence in East-central Florida, Usa

Wednesday, January 4
10:00 AM - 5:00 PM
Location: ChuLv Hall

Sinkholes occur when surficial soils gradually subside or suddenly collapse into subsurface cavities and voids due to raveling and erosion of subsurface soils that are caused by dissolution and washing-off of underlying soluble carbonate bedrock. Sinkhole occurrence is related to local-scale hydrogeological conditions (groundwater recharge rate and hydraulic head difference between water table and potentiometric level). Historical data has shown that sinkholes are more likely to occur in the beginning of the wet season and the frequency of occurrence is seasonally varied. In this study, the East-Central Florida region, known as a sinkhole prone area, is selected as the study area. Seasonality of sinkhole occurrence is studied, and the relationships between the spatial distribution of sinkholes and groundwater recharge rate and hydraulic head difference are quantitatively investigated. The analysis results indicate that the seasonality of sinkhole occurrence is due to seasonal variation of rainfall and groundwater level, and sinkholes are most likely to occur when the local-scale hydraulic head difference stays constant at a peak value after a sharp increase over a short period of time. The results also indicate that sinkhole density increases linearly with increases in groundwater recharge rate and hydraulic head difference.

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Investigation of the Impacts of Local-scale Hydrogeological Conditions on Sinkhole Occurrence in East-central Florida, Usa



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