Comparison of the variability in fluxes of ground water and solutes in lakes and wetlands in central North America

Baugh, James W La; Winter, T. C.; Rosenberry, Donald O.

doi:10.1080/03680770.1998.11901266

Cited by 5 publications

(5 citation statements)

References 15 publications

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“…The ground water inputs are mostly responsible for the higher values of variables i.e., chlorides, NO 3 -N, sulfates, and hardness. Earlier reports have also indicated that groundwater plays an important role in the solute budgets of the receiving surface waters (e.g., Furch, 2000;La Baugh et al, 2000;Magnuson & Kratz, 2000). In addition, numerous studies have confirmed that groundwater inputs tend to increase the concentrations of chlorides (Allen et al, 1999), NO 3 -N (Berka et al, 2001;Piirsoo, 2001;Narula et al, 2002), sulfates (Drever, 1996;Kaçaroglu et al, 2001), and cations, Mg ??…”

Section: Discussionmentioning

confidence: 96%

Seasonal dynamics of zooplankton in a shallow eutrophic, man-made hyposaline lake in Delhi (India): role of environmental factors

Arora

Mehra

2009

Hydrobiologia

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Old Fort Lake, a small (1.6 ha), shallow, and recreational water body in Delhi (India) was studied through monthly surveys in two consecutive years (January, 2000-December, 2001. Precipitation is the major source of water for this closed basin lake. In addition, ground water is used for replenishing the lake regularly. This alkaline, hyposaline hard water lake contains very high ionic concentration, especially of nitrates. Based on overall ionic composition, this lake can be categorized as chloride-sulfate alkaline waters with the anion sequence dominated by SO 4 2-[ Cl -[ HCO 3 -, and the cations by Mg ?? [ Ca ?? . The overall seasonal variability in physicochemical profile was largely regulated by the annual cycle of evaporation and precipitation, whereas the ground water largely influences its water quality. The lake exhibited phytoplankton-dominated turbid state due to dominance of the blue green alga, Microcystis aeruginosa. The persistent cyanobacterial blooms and the elevated nutrient levels are indicative of the cultural eutrophication of the lake. This study focuses on the relative importance of eutrophic vis-à-vis hyposaline conditions in determining the structure and seasonal dynamics of zooplankton species assemblages. A total of 52 zooplankton species were recorded and rotifers dominated the community structure qualitatively as well as quantitatively. The genus Brachionus comprised a significant component of zooplankton community with B. plicatilis as the most dominant species. The other common taxa were B. quadridentatus, B. angularis, Lecane grandis, L. thalera, L. punctata, Mesocyclops sp., and Alona rectangula. Multivariate data analysis techniques, Canonical Correspondence Analysis (CCA) along with Monte Carlo Permutation Tests were used to determine the minimum number of environmental factors that could explain statistically significant (P \ 0.05) proportions of variation in the species data. The significant variables selected by CCA were NH 3 -N followed by percent saturation of DO, COD, SS, BOD, NO 2 -N, rainfall, silicates, and PO 4 -P. The results indicate that the seasonal succession patterns of the zooplankton species were largely controlled by physicochemical factors related directly or indirectly to the process of eutrophication, whereas hyposaline conditions in the lake determined the characteristic species composition.

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Section: Discussionmentioning

confidence: 96%

Seasonal dynamics of zooplankton in a shallow eutrophic, man-made hyposaline lake in Delhi (India): role of environmental factors

Arora

Mehra

2009

Hydrobiologia

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“…If a lake or wetland is located near the upper end of an extensive ground water flow system, it will have a smaller ground water watershed than if it is located near the lower end of the flow system. Chemical budgets of topographically isolated surface water are related to the amount of water and solutes received from ground water and the amount of water and solutes lost to ground water (Schwartz and Gallup 1978;Wood and Sanford 1990;Gosselin et al 1994;Cheng and Anderson 1994;LaBaugh et al 2000). Therefore, a surface water body near the upper end of a flow system would be expected to have fewer solutes contributed by ground water than a surface water body near the lower end.…”

Section: Discussionmentioning

confidence: 99%

Where Does the Ground Water in Small Watersheds Come From?

2003

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Surface water and ground water watersheds commonly do not coincide. This condition is particularly relevant to understanding biogeochemical processes in small watersheds, where detailed accounting of water and solute fluxes commonly are done. Ground water watersheds are not as easily defined as surface watersheds because (1) they are not observable from land surface; (2) ground water flow systems of different magnitude can be superimposed on one another; and (3) ground water divides may move in response to dynamic recharge and discharge conditions. Field studies of relatively permeable terrain in Wisconsin, Minnesota, and Nebraska indicate that lakes and wetlands in small watersheds located near the lower end of extensive ground water flow systems receive ground water inflow from shallow flow systems that extend far beyond their surface watershed, and they may also receive ground water inflow from deeper regional flow systems that pass at depth beneath local flow systems. Field studies of mountainous terrain that have low‐permeability deposits in New Hampshire and Costa Rica also indicate that surface water bodies receive ground water inflow from sources beyond their local surface watersheds. Field studies of lakes and wetlands in North Dakota, Nebraska, and Germany indicate that ground water divides move in response to changing climate conditions, resulting in a variable source of ground water inflow to those surface water bodies.

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“…When concerning nutrient loads, some additional reasons for neglecting the groundwater discharge can be identified, such as small seepage but high concentrations. Groundwater, because of its generally higher concentrations of most water compounds, plays a relatively larger role in lake chemical budgets than it does in lake water budgets (Vanek, ; Shaw et al, ; Cherkauer et al, ; LaBaugh et al, ; Buso et al, ). Even small water fluxes might result in substantial mass fluxes to lakes and might have significant impacts on chemical budgets of lakes.…”

Section: Why Has Lgd Been Disregarded So Long?mentioning

confidence: 99%

Groundwater – the disregarded component in lake water and nutrient budgets. Part 2: effects of groundwater on nutrients

Lewandowski

Meinikmann

Nützmann

et al. 2015

Hydrological Processes

147

117

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Lacustrine groundwater discharge (LGD) transports nutrients from a catchment to a lake, which may fuel eutrophication, one of the major threats to our fresh waters. Unfortunately, LGD has often been disregarded in lake nutrient studies. Most measurement techniques are based on separate determinations of volume and nutrient concentration of LGD: Loads are calculated by multiplying seepage volumes by concentrations of exfiltrating water. Typically low phosphorus (P) concentrations of pristine groundwater often are increased due to anthropogenic sources such as fertilizer, manure or sewage. Mineralization of naturally present organic matter might also increase groundwater P. Reducing redox conditions favour P transport through the aquifer to the reactive aquifer-lake interface. In some cases, large decreases of P concentrations may occur at the interface, for example, due to increased oxygen availability, while in other cases, there is nearly no decrease in P. The high reactivity of the interface complicates quantification of groundwater-borne P loads to the lake, making difficult clear differentiation of internal and external P loads to surface water. Anthropogenic sources of nitrogen (N) in groundwater are similar to those of phosphate. However, the environmental fate of N differs fundamentally from P because N occurs in several different redox states, each with different mobility. While nitrate behaves essentially conservatively in most oxic aquifers, ammonium's mobility is similar to that of phosphate. Nitrate may be transformed to gaseous N 2 in reducing conditions and permanently removed from the system. Biogeochemical turnover of N is common at the reactive aquifer-lake interface. Nutrient loads from LGD were compiled from the literature. Groundwater-borne P loads vary from 0.74 to 2900 mg PO 4 -P m À2 year À1 ; for N, these loads vary from 0.001 to 640 g m À2 year À1 . Even small amounts of seepage can carry large nutrient loads due to often high nutrient concentrations in groundwater. Large spatial heterogeneity, uncertain areal extent of the interface and difficult accessibility make every determination of LGD a challenge. However, determinations of LGD are essential to effective lake management. a The method to estimate maximum natural groundwater concentrations is described in Wendland et al. (2005). Unfortunately, the values for phosphate are only published in German in Kunkel et al. (2004).

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Comparison of the variability in fluxes of ground water and solutes in lakes and wetlands in central North America

Cited by 5 publications

References 15 publications

Seasonal dynamics of zooplankton in a shallow eutrophic, man-made hyposaline lake in Delhi (India): role of environmental factors

Seasonal dynamics of zooplankton in a shallow eutrophic, man-made hyposaline lake in Delhi (India): role of environmental factors

Where Does the Ground Water in Small Watersheds Come From?

Groundwater – the disregarded component in lake water and nutrient budgets. Part 2: effects of groundwater on nutrients

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