Comparison of phosphorus reduction alternatives in control of nutrient concentrations in Lake Uluabat (Bursa, Turkey): Partial versus full sediment dredging

Yenilmez, Firdes; Aksoy, Ayşegül

doi:10.1016/j.limno.2012.05.003

Cited by 24 publications

(8 citation statements)

References 12 publications

(28 reference statements)

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“…Those models can be used to simulate different water quality problems. For example, while the Qual2E model (Palmieri & De Carvalho, 2006;Chapra, 2008) and its updated version Qual2K model (Von Sperling, 2007;Chapra et al, 2008;De Paula, 2011) are used to model water quality in river and stream, WASP model (Lai et al, 2012;Zhang & Rao, 2012;Yenilmez & Aksoy, 2013) has been used to examine eutrophication in lakes or streams and heavy metal pollution in rivers. AQUATOX model (Mamaqani et al, 2011;McKnight et al, 2012) is a valuable tool in ecological risk assessment for aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Integrated modeling of water quantity and quality in the Araguari River basin, Brazil

Salla

Paredes-Arquiola

Solera

et al. 2014

lajar

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ABSTRACT. The Araguari River basin has a huge water resource potential. However, population and industrial growth have generated numerous private and collective conflicts of interest in the multiple uses of water, resulting in the need for integrated management of water quantity and quality at the basin scale. This study used the AQUATOOL Decision Support System. The water balance performed by the SIMGES module for the period of October 2006 to September 2011 provided a good representation of the reality of this basin. The parameters studied were dissolved oxygen, biochemical oxygen demand, organic nitrogen, ammonia, nitrate and total phosphorus. The coefficients of biochemical reactions, sedimentation rates and sediment dissolved oxygen release for this period were calibrated and validated in the quality modeling using the GESCAL module. A sensitivity analysis indicated that the coefficients of carbonaceous matter decomposition, nitrification, water temperature, and sediment oxygen demand interfered more significantly in the variables of state. To prevent eutrophication in the Nova Ponte reservoir and in the other cascade reservoirs, the local River Basin Committee should adopt restrictive actions against the use of agricultural fertilizers. On the other hand, in the sub basin of the Uberabinha River, new alternatives for public water supply to the city of Uberlândia and improvements in the treatment efficiency of the main wastewater treatment plant (WWTP) should be proposed, since the biochemical oxygen demand, ammonia and total phosphorus failed to meet the requirements of COPAM (2008) in the driest months. Keywords: water, modelling, AQUATOOL, Araguari River, basin, Brazil.Modelación integrada de cantidad y calidad del agua en la cuenca del río Araguari, Brasil RESUMEN. La cuenca del río Araguari tiene un enorme potencial de recursos hídricos. Sin embargo, la población y crecimiento industrial han generado numerosos conflictos de interés, privados y colectivos, en los usos múltiples del agua, dando lugar a la necesidad de una gestión integrada de la cantidad y calidad del agua a nivel de la cuenca. En este estudio se utilizó el Sistema de Soporte de Decisión AQUATOOL. El balance hídrico realizado por el módulo SIMGES, para el período de octubre 2006 a septiembre 2011 proporcionó una buena representación de la realidad de esta cuenca. Los parámetros estudiados fueron el oxígeno disuelto, demanda bioquímica de oxígeno, nitrógeno orgánico, amonio, nitrato y fósforo total. Los coeficientes de las reacciones bioquímicas, tasas de sedimentación y demanda de oxígeno disuelto del sedimento para este período fueron calibrados y validados en la modelación de calidad del agua, mediante el módulo GESCAL. El análisis de sensibilidad indica que los coeficientes de degradación de la materia orgánica, nitrificación, temperatura del agua y demanda de oxígeno del sedimento interfirieron más significativamente en las variables de estado. Para evitar la eutrofización en el embalse de Ponte Nova y en el resto de los embalses en ...

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Section: Introductionmentioning

confidence: 99%

Integrated modeling of water quantity and quality in the Araguari River basin, Brazil

Salla

Paredes-Arquiola

Solera

et al. 2014

lajar

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“…Multiple uses of surface water and uncontrolled discharge of sanitary wastes cause negative impacts on the quantity and quality of water in urbanized regions (Zhang et al, 2011;McKnight et al, 2012;Sulis & Sechi, 2013;Yenilmez & Aksoy, 2013;Salla et al, 2013a). Among the anthropic actions that affect water bodies, release of inorganic and carbonaceous and nitrogenous organic compounds particularly degrades water quality, since the water has limited capacity for biochemical degradation of supernatant organic matter, so that the dissolved oxygen, among its various functions, is a determining factor for the survival of living organisms in the water.…”

Section: Introductionmentioning

confidence: 99%

Importance of calibration for mathematical modeling of self-purification of lotic environments

et al. 2016

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Aim To demonstrate the importance of calibration in mathematical modeling of self-purification in lotic environments, this study simulated the behavior of various parameters in a river with average annual flows between 4.0 and 32.0 m3.s-1, in a segment downstream from the entry of treated wastewater from a sewage treatment station (average monthly flow of 2.1 m3.s-1). Methods Numerical solution by finite difference of the advection-diffusion equation was used to study the dispersion and to quantify and monitor the evolution over time of the parameters DO, BOD5, Ptotal, NH3, NO3- and the levels of the heavy metals cadmium, chromium, copper, lead and zinc. The longitudinal behavior of the water quality parameters simulated by calibrating the state variables was compared with the behavior of the same parameters simulated via state variables available in the literature. The sensitivity of the state variables was also analyzed. Results The calibration process led to good fits between the simulated and actual data for all the parameters analyzed. On the other hand, the comparison of the water quality model using calibrated state variables with the model based on state variables obtained in the literature revealed inconsistencies regarding the parameters DO, Ptotal, ammonia, nitrate and all the heavy metals. Conclusions Considering the wide threshold ranges of the state variables in the literature and the dearth of studies on calibrating the coefficient of decay and quantifying the release of heavy metals by bottom sediment, this study can serve as a base for future investigations in lotic environments with similar hydraulic and water quality characteristics.

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“…The QUAL2E models (Chapra et al, 2008;Palmieri & Carvalho, 2006) and their updated versions QUAL2K and QUAL2kw (Chapra et al, 2008;Von Sperling, 2007;De Paula, 2011) are well accepted for river and stream water quality modeling. The WASP (Lai et al, 2012;Yenilmez & Aksoy, 2013;Zhang & Rao, 2012) and WEAP models (Mehta et al, 2013;Weaver et al, 2013) are widely used in water resources planning to assess lake eutrophication and climate change, respectively. On the other hand, the AQUATOX model (Mamaqani et al, 2011;Mcknight et al, 2012) is a powerful tool for assessing ecological risks in aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Self-Cleaning Ability of the Middle and Lower Courses of the Uberaba River, Upgrh-Gd8

Salla¹,

Ferreira²,

Pereira³

et al. 2014

J. Urb. and Environ. Engng

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Abstract:The multiple and balanced use of water resources has become a difficult task, since the implementation and continuous improvement of management systems still fail to keep abreast of the constant changes occurring in the environment due to human activities. Water planning and management on a river basin scale requires the use of computational tools that allow for joint modeling of water quantity and quality. This study involved an assessment of the self-cleaning ability of the middle and lower courses of the Uberaba River, located in the state of Minas Gerais, Brazil. This river is extremely important because its waters supply a population of approximately 322 500 distributed among the municipalities of Uberaba, Veríssimo and Conceição das Alagoas. The water quality parameters of dissolved oxygen, biochemical oxygen demand, organic nitrogen, ammonia, nitrate and total phosphorus were modeled for the period of October 2012 to September 2013, using the AQUATOOL system. The constants of biochemical reactions were calibrated by the trial and error method. The sensitivity analysis of the initially calibrated constants K a , K d , KN oa and KN ai and of the quality parameters of the intermediate inputs did not reveal significant variations in water quality. In the analysis of pollution scenarios, considering the critical flow Q 7,10 , it was found that organic nitrogen, ammonia and nitrate remained within the levels established by Minas Gerais (2008) and Brazil (2005). The concentration of dissolved oxygen would have to increase by 156% when compared with the value of the driest month only in the intermediate input that comprises the entire urban area of the city of Uberaba, whose urban streams receive domestic and industrial effluents. On the other hand, the parameters BOD 5 and P total were the most problematic, with high values in almost all the intermediate inputs, except for the Jataí and Preguiça streams, whose subbasins have minor areas of contribution. This indicates that, in addition to the pollutant loads from the urban area of Uberaba, the use of 70.6% of the total land area of the Uberaba River subbasin for agricultural and pastureland purposes contribute to the high concentrations of BOD 5 and P total .

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Comparison of phosphorus reduction alternatives in control of nutrient concentrations in Lake Uluabat (Bursa, Turkey): Partial versus full sediment dredging

Cited by 24 publications

References 12 publications

Integrated modeling of water quantity and quality in the Araguari River basin, Brazil

Integrated modeling of water quantity and quality in the Araguari River basin, Brazil

Importance of calibration for mathematical modeling of self-purification of lotic environments

Self-Cleaning Ability of the Middle and Lower Courses of the Uberaba River, Upgrh-Gd8

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