Simulation of Water Levels and Water Diversions in a Subtropical Coastal Wetland

Restrepo, Jorge Iván Cuervo; Garces, D.; Montoya, Angela M.; Restrepo, N.; Giddings, J.

doi:10.2112/04-0262.1

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…Recurrence intervals for rainfall or water table events are sometimes estimated from daily measurements (Hershfield 1961; Restrepo et al 2006; DOAH Case No. 07‐564, City of Lakeland v. SWFWMD 2007).…”

Section: Resultsmentioning

confidence: 99%

“…In the fixed time interval analysis, a rainfall event is simply defined as the total rainfall that occurs within a given time interval; the associated response is defined as the net change over the identified response time interval. While no practitioner would identify rainfall and responses in this manner for hourly data, we have observed this done in practice with daily data (Hershfield 1961; Restrepo et al 2006; DOAH Case No. 07‐564, City of Lakeland v. SWFWMD 2007).…”

Section: Methodsmentioning

confidence: 99%

“…Several papers have laid out and tested frameworks, both empirical and theoretical, for describing the basic water table response–rainfall relationship (e.g., Rennolls et al 1980; Viswanathan 1983, 1984; Restrepo and Giddings 1994; Wu et al 1996; Restrepo et al 2006; Tan et al 2007). Empirical schemes, for example, relate water table rise over a fixed time interval to rainfall over specified preceding intervals (e.g., Rennolls et al 1980; Viswanathan 1984).…”

Section: Introductionmentioning

confidence: 99%

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Predicting Water Table Response to Rainfall Events, Central Florida

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Kruse

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A rise in water table in response to a rainfall event is a complex function of permeability, specific yield, antecedent soil-water conditions, water table level, evapotranspiration, vegetation, lateral groundwater flow, and rainfall volume and intensity. Predictions of water table response, however, commonly assume a linear relationship between response and rainfall based on cumulative analysis of water level and rainfall logs. By identifying individual rainfall events and responses, we examine how the response/rainfall ratio varies as a function of antecedent water table level (stage) and rainfall event size. For wells in wetlands and uplands in central Florida, incorporating stage and event size improves forecasting of water table rise by more than 30%, based on 10 years of data. At the 11 sites studied, the water table is generally least responsive to rainfall at smallest and largest rainfall event sizes and at lower stages. At most sites the minimum amount of rainfall required to induce a rise in water table is fairly uniform when the water table is within 50 to 100 cm of land surface. Below this depth, the minimum typically gradually increases with depth. These observations can be qualitatively explained by unsaturated zone flow processes. Overall, response/rainfall ratios are higher in wetlands and lower in uplands, presumably reflecting lower specific yields and greater lateral influx in wetland sites. Pronounced depth variations in rainfall/response ratios appear to correlate with soil layer boundaries, where corroborating data are available.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%