Water budget and vertical conductance for Lowry (Sand Hill) Lake in north-central Florida, USA

Abstract:A simple method, modified from White's method, was developed and verified for estimating seepage from two stormwater detention areas (SDAs) for 2 years, using night-time changes in surface water levels. The SDAs were located in warm sub-tropical Florida where the assumption of negligible night-time evaporation for White's method does not hold true. Daily seepage was estimated using the nocturnal water level fluctuations on no flow days during winter when evaporation losses were insignificant. Specific yield, rather than the composite specific yield, provided accurate seepage estimates. The average annual seepage from the two SDAs was 2.03 m/year. At almost 70% of surface flows, seepage is a significant contributor to regional surface and sub-surface flows. Comparison of seepage estimates from the night-time method (NM) and the water balance (WB) method showed that the NM-based estimates were within the range of the estimates from the WB method. At SDA1, the differences between the NM and WB estimates were 1% and 11%, for the 2 years. The discrepancy between the two estimates became higher (27% and 23%) at SDA2. Larger differences at SDA2 were because of higher error in quantifying pumped inflows for the WB method. Successful performance of NM combined with its low resource (single well monitoring) requirements will help quantify seepage from detention areas and other similar features (e.g. ponds, constructed wetlands) in warmer climates. A scale-up for the Caloosahatchee River basin showed that seepage from SDA's accounted for 15% of annual river flows indicating the importance of seepage in evaluating water and chemical balances.

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“…Similar error (5%) was used by Motz et al . (). The outflow components included surface outflow (O) through weir/orifice and ET.…”

Section: Methodsmentioning

confidence: 97%

“…These errors were used to evaluate the uncertainty associated with net seepage from water balance using Equation from Motz et al . (). Equation assumes that the errors in individual water balance components are independent of each other.…”

Section: Methodsmentioning

confidence: 97%

Using nocturnal water level fluctuations for estimating seepage from stormwater detention systems

Shukla

Annable

2015

Hydrological Processes

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“…For a lake that interacts with both the surface water and groundwater systems, the water‐budget equation may be expressed in the following (Motz, 1998; Motz et al. , 2001): where ΔS is the change in storage of the lake; P is the direct precipitation; I s is the surface‐water inflow; R is the direct runoff (i.e., overland flow) into the lake; I g is the groundwater inflow from the surficial aquifer; E is the evaporation; O s is the surface‐water outflow; O g is the groundwater outflow to the surficial aquifer from the lake; and L is the vertical leakage through the underlying confining unit to the upper Floridan aquifer (Figure 3).…”

Section: Hydrological Modeling and Water Budget Estimationmentioning

confidence: 99%

“… Generalized Hydrogeologic Section and Water‐Budget Components for a Sinkhole Lake (from Motz et al. , 2001).…”

Section: Hydrological Modeling and Water Budget Estimationmentioning

confidence: 99%

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Estimating Water Budgets and Vertical Leakages for Karst Lakes in North-Central Florida (United States) Via Hydrological Modeling1

Lin

2011

JAWRA Journal of the American Water Resources Association

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Newnans, Lochloosa, and Orange Lakes are closely hydrologically connected karst lakes located in north-central Florida, United States. The complex karst hydrology in this region poses a great challenge to the hydrological modeling that is essential to the development of Total Maximum Daily Loads for these lakes. We used a Hydrological Simulation Program -Fortran model coupled with the parallel Parameter ESTimation model calibration and uncertainty analysis software to estimate effectively the hydrological interactions between the lakes and the underlying upper Floridan aquifer and the water budgets for these three lakes. The net results of the lake-groundwater interactions in Newnans and Orange Lakes are that both lakes recharge the underlying upper Floridan aquifer, with the recharge rate of the latter one magnitude greater than that of the former. However, for Lochloosa Lake, the net lake-groundwater interaction is that the lake gains water from groundwater in a significant amount, approximately 40% of its total terrestrial water input. The annual average vertical leakages estimated for Newnans, Lochloosa, and Orange Lakes are 6.0 · 10 6 , )8.9 · 10 6 , and 44.4 · 10 6 m 3 , respectively. The average vertical hydraulic conductance (K v ⁄ b) of the units between a lake bottom and the underlying upper Floridan aquifer in this region are also estimated to be from 1.26 · 10 )4 to 1.01 · 10 )3 day )1 .(KEY TERMS: HSPF; karst hydrology; lake water budget; optimization; surface water ⁄ groundwater interaction.)

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Groundwater ‐ the disregarded component in lake water and nutrient budgets. Part 1: effects of groundwater on hydrology

Rosenberry

Lewandowski

Meinikmann

et al. 2015

Hydrological Processes

144

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Abstract:Lake eutrophication is a large and growing problem in many parts of the world, commonly due to anthropogenic sources of nutrients. Improved quantification of nutrient inputs is required to address this problem, including better determination of exchanges between groundwater and lakes. This first of a two-part review provides a brief history of the evolution of the study of groundwater exchange with lakes, followed by a listing of the most commonly used methods for quantifying this exchange. Rates of exchange between lakes and groundwater compiled from the literature are statistically summarized for both exfiltration (flow from groundwater to a lake) and infiltration (flow from a lake to groundwater), including per cent contribution of groundwater to lake-water budgets. Reported rates of exchange between groundwater and lakes span more than five orders of magnitude. Median exfiltration is 0.74 cm/day, and median infiltration is 0.60 cm/day. Exfiltration ranges from near 0% to 94% of input terms in lake-water budgets, and infiltration ranges from near 0% to 91% of loss terms. Median values for exfiltration and infiltration as percentages of input and loss terms of lake-water budgets are 25% and 35%, respectively. Quantification of the groundwater term is somewhat method dependent, indicating that calculating the groundwater component with multiple methods can provide a better understanding of the accuracy of estimates. The importance of exfiltration to a lake budget ranges widely for lakes less than about 100 ha in area but generally decreases with increasing lake area, particularly for lakes that exceed 100 ha in area. No such relation is evident for lakes where infiltration occurs, perhaps because of the smaller sample size.

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Water budget and vertical conductance for Lowry (Sand Hill) Lake in north-central Florida, USA

Cited by 21 publications

References 9 publications

Using nocturnal water level fluctuations for estimating seepage from stormwater detention systems

Using nocturnal water level fluctuations for estimating seepage from stormwater detention systems

Estimating Water Budgets and Vertical Leakages for Karst Lakes in North-Central Florida (United States) Via Hydrological Modeling1

Groundwater ‐ the disregarded component in lake water and nutrient budgets. Part 1: effects of groundwater on hydrology

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