Restoration and Management of Lakes and Reservoirs

Cooke, G. Dennis; Welch, Eugene B.; Peterson, Spencer A.; Nichols, Stanley A.

doi:10.1201/9781420032109

Cited by 342 publications

(316 citation statements)

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“…However, compared to the number of lakes treated, reported cases are sparse and the most comprehensive evaluation of Al treatment effects is that for North American lakes provided by Welch & Cooke (1999) and Cooke et al (2005). Of 12 dimictic lakes and nine polymictic lakes, improved water quality after Al treatment was evident in seven dimictic and six polymictic lakes with an average longevity of 13 years for the dimictic lakes and ranged from 5 to 11 years for the polymictic lakes.…”

Section: Introductionmentioning

confidence: 95%

“…The need is further emphasized by the fact that Al treatment appears to be one of the most cost-effective ways to reduce internal P loading and therefore holds a large potential in lake restoration (Cooke et al, 2005). Here, we report the treatment effects for six (two dimictic and four polymictic) Danish lakes where external P loading remained largely unchanged in all but one during treatments.…”

Section: Introductionmentioning

confidence: 97%

“…For all dimictic lakes but one, diversion of external P loading was established concomitantly, implying that the improved water quality cannot be ascribed solely to the Al treatment; however, a two-thirds decrease in hypolimnetic TP build-up in five of the lakes points to reduced internal P loading as a major cause for improvement. For the shallow lakes, three treatments were unsuccessful and the authors suggest that extensive growth and subsequent decay of macrophytes may have mobilized P buried deeper in the sediment and thereby created a bypass of the Al-treated sediment layer (Welch & Cooke, 1999;Cooke et al, 2005). More information from both published and unpublished cases has later been gathered by Welch (Welch, 2005, Welch, E., personal communication) and an evaluation of the short-term success, mostly conducted by lake managers, reveals that treatments were successful in 56 of 75 lakes and unsuccessful in 19.…”

Section: Introductionmentioning

confidence: 99%

“…Most treatments have been performed in USA, but with the implementation of the EU Water Frame Directive and its objective of attainment of 'good' ecological status in water bodies, which up to 36% of the European lakes cannot fulfill, the number of lake restorations in Europe is foreseen to increase in the future (Spears et al, 2013). In most cases, aluminum (Al) is added to the water as alum (Al sulfate) or poly-Al chloride which reacts rapidly with lake water to form an Al(OH) 3 floc with high affinity for phosphate (e.g., Cooke et al, 2005) and for dissolved organic P compounds (Reitzel et al, 2009). However, other dissolved substances such as silicate and humic acids may interfere with the binding of P (Vicente et al, 2008a).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of aluminum treatment efficiency on water quality and internal phosphorus cycling in six Danish lakes

2015

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If dosed sufficiently relative to the pool of excess phosphorus (P) in the lake sediment and lake water, aluminum (Al) is hypothesized to block sediment P release and thereby improve water clarity in eutrophic lakes. Aluminum has been used in [200 lakes worldwide, but in some 30% of the known cases water clarity did not improve beyond the first year, likely because of underdosing or continued high external P loading. We evaluate the viability of the aluminum dosing hypothesis for six Danish lakes that received Al in a molar ratio of \2-10 relative to the potentially mobile P pool. Lake water total P declined to values that could be predicted from the external P loading but increased again in the two lakes receiving the lowest Al doses. Lasting ([2-3 years) improvement of water clarity was only observed in two lakes. Sediment P release rates, which were measured in four lakes, declined significantly but then increased gradually again in the two lakes receiving the lowest doses. We conclude that if external P-loading is sufficiently low, lasting improvement of water quality can be obtained if Al is dosed 10:1 or higher relative to the size of the mobile P pool.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of aluminum treatment efficiency on water quality and internal phosphorus cycling in six Danish lakes

2015

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“…Therefore, in recent years, different measures of restoration including physical, chemical, and biological methods have been applied in many countries (Cooke et al 2005;Søndergaard et al 2007;Gulati et al 2008). One of the physical techniques of overcoming eutrophication is hypolimnetic withdrawal, which includes the removal of water from the hypolimnion.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the restoration measures in a man-made reservoir: do oligochaete communities respond to the improvement of water quality?

Krodkiewska

Kostecki

2015

Environ Monit Assess

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Studies were carried out in a man-made reservoir that was undergoing restoration using selective hypolimnetic withdrawal (Pławniowice reservoir, Southern Poland). The aim of the research was to assess the changes in the composition of oligochaete fauna in relation to water quality and to estimate whether indices based on oligochaetes may be useful in the assessment of a reservoir's recovery from eutrophication. Samples were collected in the first, fifth, and eighth year of the restoration during the summer stratification at 22 sites along six transects that covered depths from 2 to 15 m. The results of the survey indicated an improvement in some physical and chemical water parameters in respect to those during the period prior to the restoration measures. The present study showed an increase in the oligochaete diversity and a decrease in their abundance accompanied by a shift toward a larger share of taxa that are characteristic of mesotrophic and oligotrophic conditions. This study detected slow changes in the values of the trophic indices based on oligochaetes toward mesotrophic conditions. Discriminant analysis, performed using stepwise forward selection, demonstrated a good separation of samples from 2004 and 2011 according to trophic condition (TC) and biotic quality index (BQI) indices. The present data shows that metrics based on Oligochaeta may be useful for detecting changes in the trophic status.

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Oxygen dynamics in a boreal lake responds to long‐term changes in climate, ice phenology, and DOC inputs

et al. 2015

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Boreal lakes are impacted by climate change, reduced acid deposition, and changing loads of dissolved organic carbon (DOC) from catchments. We explored, using the process-based lake model MyLake, how changes in these pressures modulate ice phenology and the dissolved oxygen concentrations (DO) of a small boreal humic lake. The model was parametrized against year-round time series of water temperature and DO from a lake buoy. Observed trends in air temperature (+0.045°C yr À1 ) and DOC concentration (0.11 mg C L À1 yr À1 , +1% annually) over the past 40 years were used as model forcings. A backcast of ice freezing and breakup dates revealed that ice breakup occurred on average 8 days earlier in 2014 than in 1974. The earlier ice breakup enhanced water column ventilation resulting in higher DO in the spring. Warmer water in late summer led to longer anoxic periods, as microbial DOC turnover increased. A long-term increase in DOC concentrations caused a decline in lake DO, leading to 15% more hypoxic days (<3 mg L À1 ) and 10% more anoxic days (<15 μg L À1 ) in 2014 than in 1974. We conclude that climate warming and increasing DOC loads are antagonistic with respect to their effect on DO availability. The model suggests that DOC is a stronger driver of DO consumption than temperature. The browning of lakes may thus cause reductions in the oxythermal habitat of fish and aquatic biota in boreal lakes.

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Restoration and Management of Lakes and Reservoirs

Cited by 342 publications

References 0 publications

Evaluation of aluminum treatment efficiency on water quality and internal phosphorus cycling in six Danish lakes

Evaluation of aluminum treatment efficiency on water quality and internal phosphorus cycling in six Danish lakes

Assessment of the restoration measures in a man-made reservoir: do oligochaete communities respond to the improvement of water quality?

Oxygen dynamics in a boreal lake responds to long‐term changes in climate, ice phenology, and DOC inputs

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