Evaluation of eutrophication process in Lake Sapanca (Sakarya, Turkey)

Akkoyunlu, Atilla; Ileri, Recep

doi:10.1504/ijep.2003.004340

Cited by 10 publications

(7 citation statements)

References 5 publications

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“…Lake Sapanca discharges via the Çark River on the northeast shore into Sakarya River. A dam was built at the lake outlet in 1979 to regulate the water level (Akkoyunlu and İleri, 2003;Gürbüz and Gürer, 2008a). The Sakarya River outflows into the lake during periods of high discharge via the marshy floodplain that separates the two (Russell, 1954;Doğan, 2004;Gürbüz and Leroy, in press).…”

Section: (Figs 1b 2 and 3)mentioning

confidence: 99%

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault

Leroy

Boyraz

Gürbüz

2009

Quaternary Science Reviews

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High-resolution palynological analysis of a 38-cm-long core collected from Lake Sapanca, northwest Turkey, reveals large earthquakes that occurred during the second half of the 20 th century along the North Anatolian Fault Zone. Four events have disturbed the lacustrine sedimentary sequence. Three of the four events are historical earthquakes in 1999 in Izmit, 1967 in Mudurnu and 1957 in Abant. These events are recorded in the core by turbiditic deposits and reworked sediment and by low overall palynomorph concentrations but high values of thick-exined pollen, fern spores and fungal spores. Palynomorphs in the event beds have been grouped based on their associations in modern moss, river and lake samples. The inferred mechanisms of transport and sources for the palynomorphs are: 1-lake sediment displaced by slump, 2-collapsed shoreline sediment owing to seiche, waves and sudden lake level changes, 3-subsidence of deltas and 4river-transported soil and sediment from upland areas. The 1999 Izmit earthquake is only weakly recorded by palynomorphs, probably due to recent engineering control on the rivers. The 1967 Mudurnu earthquake had the strongest effect on the lake, introducing successive packages of sediment to the centre of the lake from underwater slopes, the lakeshore and rivers.

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Section: (Figs 1b 2 and 3)mentioning

confidence: 99%

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault

Leroy

Boyraz

Gürbüz

2009

Quaternary Science Reviews

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“…1C), which can dry up during summer and often have low sediment loads, provide the inflow to Lake Sapanca (Gürbüz and Gürer, 2008). The lake discharges through the canalised Çark River at the northeast end of the lake (Akkoyunlu and Ileri, 2003) (Fig. 2).…”

Section: The Study Sitementioning

confidence: 99%

Palaeolimnology of Lake Sapanca and identification of historic earthquake signals, Northern Anatolian Fault Zone (Turkey)

Schwab

Werner

Dulski³

et al. 2009

Quaternary Science Reviews

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Lake Sapanca is located on a strand of the Northern Anatolian Fault Zone (NAFZ, Turkey), where a series of strong earthquakes (Ms > 6.0) have occurred over the past hundred years. Identifying prehistoric earthquakes in and around Lake Sapanca is key to a the better understanding of plate movements along the NAFZ. This study contributes to the development of palaeolimnological tools to identify past earthquakes in Lake Sapanca. To this end several promising proxies were investigated, specifically lithology, magnetic susceptibility, grain size (thin-section and laser analysis), geochemistry, pollen concentration, diatom assemblages, demonstrates that a combination of indicators can be used to recognize earthquakerelated event layers in cores that encompass a longer period of time.

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“…Nevertheless, in the month of August, the nitrate levels in Goinre and Ziga reservoirs are higher than above that of Bagré. This is due to the dumping of huge quantities of runoff through agricultural land upstream like it is encountered in other parts of the world [16]. The month of August is a period of heavy rain; then, the enormous quantities of rainwater that run off drain off the fertilizer residue from the fields to the water surfaces.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Agricultural and Mining Pollutions of Waterbodies within the Nakanbé Basin (Burkina Faso): The Case of the Goinré, Ziga and Bagré Reservoirs

Millogo¹,

Bazié²,

Koussoubé³

et al. 2018

JWARP

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Agriculture is harming its own future through soil degradation and pollution of the water that it generates. The different chemical analyses carried out on surface waters and the land surveys carried out in the Nakanbé basin have shown that agricultural practices contribute to water pollution. The monitoring of nitrate, ortho-phosphate and BOD 5 levels in the dams of Goinré, Ziga and Bagré during the period from August to December revealed that agricultural practices lead to variation in these parameters. The average values for nitrates are 0.833 mg/L in the Goinré fresh waterbody, 1.372 mg/L in the Ziga reservoir, and 1.267 mg/L in the Bagré fresh waterbody. As for ortho phosphate, mean values are 0.357 mg/L in the Goinré reservoir, 0.157 mg/L in the Ziga reservoir and 0.123 mg/L in the Bagré reservoir. These average values are higher than the norms established by Nisbet and Vernaux (1970) for eutrophication. Nitrates and orthophosphate are the elements that contribute to the eutrophication of water surfaces in the Nakanbé basin, although this eutrophication is of low intensity. Of all pesticides encountered in our study sites, 45% are registered by the Sahelian Pesticides Committee (CSP): 35% are nonaccredited and 20% are unknown in the global list authorized by the CSP in 2010.

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Evaluation of eutrophication process in Lake Sapanca (Sakarya, Turkey)

Cited by 10 publications

References 5 publications

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault

Palaeolimnology of Lake Sapanca and identification of historic earthquake signals, Northern Anatolian Fault Zone (Turkey)

Assessment of Agricultural and Mining Pollutions of Waterbodies within the Nakanbé Basin (Burkina Faso): The Case of the Goinré, Ziga and Bagré Reservoirs

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Evaluation of eutrophication process in Lake Sapanca (Sakarya, Turkey)

Cited by 10 publications

References 5 publications

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault

Palaeolimnology of Lake Sapanca and identification of historic earthquake signals, Northern Anatolian Fault Zone (Turkey)

Assessment of Agricultural and Mining Pollutions of Waterbodies within the Nakanb&#233; Basin (Burkina Faso): The Case of the Goinr&#233;, Ziga and Bagr&#233; Reservoirs

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Assessment of Agricultural and Mining Pollutions of Waterbodies within the Nakanbé Basin (Burkina Faso): The Case of the Goinré, Ziga and Bagré Reservoirs