Lakes in the Netherlands, their origin, eutrophication and restoration: state-of-the-art review

Gulati, R. D.; Donk, E. Van

doi:10.1007/978-94-017-1335-1_5

Cited by 167 publications

(240 citation statements)

References 71 publications

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“…Another major purpose has been to develop predictive tools supporting inter-disciplinary ecosystem management (Carpenter et al 1999), acknowledging the great importance of lake ecosystems for society (MEA 2005). The ecological quality of lakes is threatened by a large number of anthropogenic stress factors, in particular eutrophication, pollution of various types, overexploitation and invasive species, changes in land use and hydrology in the catchment and climate change (e.g., Gulati and Van Donk 2002;MEA 2005;Mooij et al 2005;Revenga et al 2005;Jeppesen et al 2009;MacKay et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Challenges and opportunities for integrating lake ecosystem modelling approaches

et al. 2010

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A large number and wide variety of lake ecosystem models have been developed and published during the past four decades. We identify two challenges for making further progress in this field. One such challenge is to avoid developing more models largely following the concept of others ('reinventing the wheel'). The other challenge is to avoid focusing on only one type of model, while ignoring new and diverse approaches that have become available ('having tunnel vision'). In this paper, we aim at improving the awareness of existing models and knowledge of concurrent approaches in lake ecosystem modelling, without covering all possible model tools and avenues. First, we present a broad variety of modelling approaches. To illustrate these approaches, we give brief descriptions of rather arbitrarily selected sets of specific models. We deal with static models (steady state and regression models), complex dynamic models (CAEDYM, CE-QUAL-W2, Delft 3D-ECO, LakeMab, LakeWeb, MyLake, PCLake, PROTECH, SALMO), structurally dynamic models and minimal dynamic models. We also discuss a group of approaches that could all be classified as individual based: superindividual models (Piscator, Charisma), physiologically structured models, stage-structured models and traitbased models. We briefly mention genetic algorithms, neural networks, Kalman filters and fuzzy logic. Thereafter, we zoom in, as an in-depth example, on the multi-decadal development and application of the lake ecosystem model PCLake and related models (PCLake Metamodel, Lake Shira Model, IPH-TRIM3D-PCLake). In the discussion, we argue that while the historical development of each approach and model is understandable given its 'leading principle', there are many opportunities for combining approaches. We take the point of view that a single 'right' approach does not exist and should not be strived for. Instead, multiple modelling approaches, applied concurrently to a given problem, can help develop an integrative view on the functioning of lake ecosystems. We end with a set of specific recommendations that may be of help in the further development of lake ecosystem models.

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Section: Introductionmentioning

confidence: 99%

Challenges and opportunities for integrating lake ecosystem modelling approaches

et al. 2010

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“…However, this is not always the case. Gulati & van Donk (2002), in their review of the eutrophication of Dutch lakes and the restoration techniques applied, found that decreasing P inputs did not always result in an improvement in water quality.…”

Section: Discussionmentioning

confidence: 99%

“…However, on an annual timescale, P retention has remained positive, suggesting that TP continues to accumulate in the lake sediments. Such accumulations are important in terms of lake recovery because, when external TP loads are reduced, these internal sources tend to release P into the water column causing a considerable delay in recovery (Sas, 1989;Gulati & van Donk, 2002;Søndergaard et al, 2003;Nürnberg & LaZerte, 2004;Jeppesen et al, 2005;Søndergaard et al, 2007;Spears et al, this volume). That said, in most lakes, P release from the sediments also promotes recovery because it increases the rate at which TP from internal sources can be exported from the system, especially during the summer months (Sondergaard et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

“…Under natural conditions, nutrient inputs to lakes are generally low and cause few water quality problems. However, anthropogenic activity within the catchment can increase nutrient inputs to waterbodies to a level that degrades water quality (Gulati & Van Donk, 2002) and promotes troublesome, and sometimes toxic, cyanobacterial blooms (Codd, 1995;Schindler, 2006;Leigh et al, 2010). This process is known as eutrophication.…”

Section: Introductionmentioning

confidence: 99%

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Historical changes (1905–2005) in external phosphorus loads to Loch Leven, Scotland, UK

May¹,

Defew²,

Bennion³

et al. 2011

Loch Leven: 40 Years of Scientific Research

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This paper reviews historical changes in the total phosphorus (TP) inputs to Loch Leven, Scotland, UK. Data derived from palaeolimnological records suggest that inputs in the early 1900s were about 6 t TP y -1 (0.45 g TP m -2 y -1 ). By 1985, this had risen to about 20 t TP y -1 (1.5 g TP m -2 y -1 ) due to increases in runoff from agricultural land and discharges from point sources. By the late 1970s, increased TP inputs were causing serious degradation of lake water quality. Most noticeably, there had been an increase in cyanobacterial blooms. A catchment management plan was implemented in the early 1990s. This resulted in a 60% reduction in the annual TP input between 1985 (20 t TP y -1 /1.5 g TP m -2 y -1 ) and 1995 (8 t TP y -1 /0.6 g TP m -2 y -1 ). The main reduction was associated with better control of point source discharges, but attempts were also made to reduce inputs from diffuse sources. The reduction in external TP loading to the lake led to a marked decline in TP retention by the lake each year.3

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“…Domestic wastewater contains compounds including nutrients and organic matter that if not properly treated, can increase water eutrophication (Gulati and van Donk 2002), alter the ecological balance of water systems, threaten aquatic organisms, and risk public health. Therefore, adequate removal of nutrient and organic matter removal are major concerns for wastewater treatment plants (WWTPs) that need to meet increasingly stringent discharge requirements.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic–oxic process without internal recycle treating low strength wastewater

Wang

Chen

2016

Journal of Environmental Sciences

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Performance of a full-scale anoxic-oxic activated sludge treatment plant (4.0 × 10 5 m 3 /day for the first-stage project) was followed during a year. The plant performed well for the removal of carbon, nitrogen and phosphorus in the process of treating domestic wastewater within a temperature range of 10.8°C to 30.5°C. Mass balance calculations indicated that COD utilization mainly occurred in the anoxic phase, accounting for 88.2% of total COD removal. Ammonia nitrogen removal occurred 13.71% in the anoxic zones and 78.77% in the aerobic zones. The contribution of anoxic zones to total nitrogen (TN) removal was 57.41%.Results indicated that nitrogen elimination in the oxic tanks was mainly contributed by simultaneous nitrification and denitrification (SND). The reduction of phosphorus mainly took place in the oxic zones, 61.46% of the total removal. Denitrifying phosphorus removal was achieved biologically by 11.29%. Practical experience proved that adaptability to gradually changing temperature of the microbial populations was important to maintain the plant overall stability. Sudden changes in temperature did not cause paralysis of the system just lower removal efficiency, which could be explained by functional redundancy of microorganisms that may compensate the adverse effects of temperature changes to a certain degree. Anoxic-oxic process without internal recycling has great potential to treat low strength wastewater (i.e., TN < 35 mg/L) as well as reducing operation costs.

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Lakes in the Netherlands, their origin, eutrophication and restoration: state-of-the-art review

Cited by 167 publications

References 71 publications

Challenges and opportunities for integrating lake ecosystem modelling approaches

Challenges and opportunities for integrating lake ecosystem modelling approaches

Historical changes (1905–2005) in external phosphorus loads to Loch Leven, Scotland, UK

Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic–oxic process without internal recycle treating low strength wastewater

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