Map of Hillsborough County, Florida, showing contours on the piezometric surface in the principal artesian aquifer

1959 ◽  
Author(s):  
W.S. Wetterhall
Keyword(s):  
Hillsborough County ◽  
Piezometric Surface ◽  
Artesian Aquifer

Hydrogeologic aspects of dewatering at Welland

1970 ◽  
Vol 7 (2) ◽  
pp. 194-204 ◽  
Author(s):  
R. N. Farvolden ◽  
J. P. Nunan
Keyword(s):  
Lacustrine Sediments ◽  
Contour Map ◽  
Flow Equations ◽  
Deep Well ◽  
Piezometric Surface ◽  
Excavation Work ◽  
Artesian Aquifer ◽  
Bedrock Aquifer ◽  
Private Wells

Realignment of the Welland Canal between Port Robinson and Port Colborne and the building of underpass structures necessitated both temporary and permanent depressurizing of an artesian aquifer. The aquifer is a thin zone of fractured dolomite found immediately beneath approximately 60 to 100 ft (18 to 30 m) of poorly-permeable glacial till and lacustrine sediments. Since most of the private wells in the Welland area obtain water from the bedrock aquifer, extensive well interference problems were anticipated. Problems in connection with the dewatering and depressurizing included design of deep-well pumping systems for excavation work, prediction and monitoring of drawdown effects, and the determination of responsibility for interference in specific areas since several dewatering systems with overlapping cones-of-depression would be operating simultaneously. To overcome a problem of insufficient hydrologic data prior to the commencement of dewatering, a contour map of the original piezometric surface was constructed from drillers' records. This map showed a normal groundwater flow system where the movement of groundwater was from local upland recharge areas to local discharge areas along the Welland River and the existing canal. A contour map of the drawdown was drawn on the assumption that deviations from the reconstructed original piezometric surface were caused by dewatering. Analysis of the cone-of-depression along with analyses of pre-engineering pumping tests provided values for aquifer coefficients required for solution of the unsteady flow equations. Because the coefficients used were average values for a relatively small area extrapolated over a broad area, the predicted drawdown showed considerable variation in reliability. The work did provide, however, a check on the numerical method (Frind 1970) which takes into account local variations.

Exploring Stakeholder and Parent Perspectives of a County Response to Adolescent Vaping and E-Cigarette Use

2021 ◽  
pp. 002204262199349
Author(s):  
Natasha Kurji ◽  
Thomas Koza ◽  
Amanda Sharp ◽  
Kathleen Moore
Keyword(s):  
United States ◽  
Substance Use ◽  
The United States ◽  
Classroom Observations ◽  
School Age ◽  
Parent Perspectives ◽  
Cigarette Use ◽  
Perceived Effectiveness ◽  
Tobacco Products ◽  
Hillsborough County

In the United States, regular cigarette use has steadily declined over the years; however, it has been met with an increase in vaping and e-cigarette use. In Tampa, Florida, this trend has been found especially prevalent among school-aged youth. To combat issues of substance use among youth and prevent criminalization for nonviolent crimes, school-age youth cited for use and possession of tobacco products in Hillsborough County were mandated to attend the Youth Tobacco Awareness Course (YTAC). The aim of this study was to investigate YTAC for its perceived effectiveness and usefulness in mitigating adolescent e-cigarette use. Classroom observations, parent focus groups, and program stakeholder interviews were conducted to comprehensively evaluate this program. Findings from this evaluation led to a deeper understanding of the barriers and facilitators to an effective course, the needs and perceptions of program stakeholders, as well as recommendations for improved future interventions.

Sign in / Sign up

Export Citation Format

Share Document