Seasonal variations of dissolved inorganic nutrients transported to the Linjiang Bay of the Three Gorges Reservoir, China

Luo, Gan; Bu, Faping; Xu, Xingkai; Cao, Jia; Wei-qun, Shu

doi:10.1007/s10661-010-1370-2

Cited by 24 publications

(12 citation statements)

References 22 publications

(19 reference statements)

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“…The same has been investigated by many other researchers. According to Wilson and Qiu (2008), Nezlin et al (2009), andGuyuan et al (2010), the stream water contamination causes a serious ecological problem in aquatic ecosystem especially in lakes and reservoirs where it is stored. It increases the cost of water treatment and even shortage of water resources.…”

Section: Resultsmentioning

confidence: 99%

Assessment of water quality of Rawal Lake by long-time monitoring

Ghumman

2010

Environ Monit Assess

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Water quality of rivers, natural lakes, and reservoirs in developing countries is being degraded because of the contaminated inflows. There is a serious need for appropriate water quality monitoring for future planning and management of clean water resources. Quality of water in Rawal Lake Pakistan has been investigated in this paper. Flows from the upstream of Rawal Lake and its surrounding villages are highly polluted. Lake water quality parameters like pH, turbidity, alkalinity, calcium, nitrite, sulfate, biological oxygen dissolved, dissolved oxygen, chloride, total dissolved solids (TDS), and coliforms were investigated. Samples of water from different locations of Korang River were collected and tested. Most of the data was collected by field sampling and field visits. However, long-term information was taken from different departments. Statistical parameters (standard deviation, maximum, minimum, mean, mode, kurtosis, skew, and Euclidean distance) of variables were determined. A distinct parameter based on the difference of the maximum value the variable and maximum allowable value of that variable defined by World Health Organization was used for analysis. Grouping and clustering of elements was made on the basis of this parameter. Trend of increasing or decreasing of values of variables over a long time was also taken into account for grouping the variables. It was concluded that the concentration of seven contaminants was higher as compared to the permissible limits under environmental standards. These variables need immediate attention. The environmentally bad conditions of Rawal Lake can only be rectified by appropriate lake environmental supervision, watershed management, and implementation of environmental legislation.

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Section: Resultsmentioning

confidence: 99%

Assessment of water quality of Rawal Lake by long-time monitoring

Ghumman

2010

Environ Monit Assess

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“…Landslides and soil erosion induce essential sediment and nutrient losses on steep slopes with subsequent matter inputs into the reservoir, encompassing sediment and sediment-bound fertilizers and pesticides (e.g., Luo et al 2010;Tian et al 2010). From 2005 to 2009, the use of chemical fertilizers and pesticides in the TGR ranged from 88,400 to 160,000 tons and from about 541 to 699 tons, respectively (SEPA 2006;MEP 2010).…”

Section: Soil Erosion Landslides and Matter Transport As Geo-hazardmentioning

confidence: 99%

Assessment of geo-hazards in a rapidly changing landscape: the three Gorges Reservoir Region in China

et al. 2015

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Large dam projects attract worldwide scientific attention due to their environmental impacts and socioeconomic consequences. One prominent example is the Three Gorges Dam (TGD) at the Yangtze River in China. Due to considerable resettlements, large-scale expansion of infrastructure and shifts in land use and management, the TGD project has irreversible impacts on the Upper Yangtze River Basin and strongly challenges the environmental conditions of this fast-developing region. Soil erosion and landslides are major geo-hazards. Knowing the extent and consequences of those geo-hazards for the landscape is essential to predict and evaluate their risk potential and allows for the development of strategies for a sustainable future land use in the Three Gorges Region (TGR). In this context, our research objectives are (1) to better understand the mechanisms of soil erosion, landslides, and diffuse matter fluxes in the TGR and their anthropogenic and environmental control factors, (2) to predict their hazard potential by combining spatial and temporal, scenario-driven high-resolution modeling in combination with multiscale earth observation data, and (3) to develop a multicomponent approach for the assessment and monitoring of geogene structures and processes. The paper describes the workflow of the project and introduces case studies, representing the current state of our research. It is shown that land-use changes as well as the water-level fluctuations of the reservoir are the crucial drivers for the soil erosion and landslide hazard. Furthermore, we present a framework aiming at the establishment of a monitoring and measuring network as well as an early warning system.

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“…As a result of eutrophication, many problems arise such as algal blooms, oxygen depletion, odour and taste problems, fish death and loss of biodiversity. Therefore, understanding the dynamics of nutrients carried by rivers is critical for resource management and prevention of eutrophication (Luo et al, 2011).…”

Section: Alimentioning

confidence: 99%

Untitled

Alkan¹,

Serdar²,

Fidan³

et al. 2013

Turk. J. Fish. Aquat. Sci.

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This study was conducted to determine physico-chemical characteristics and nutrient levels on a monthly basis of the rivers of the Eastern Black Sea region with an average flow rate of about 10 m 3 /sec and above, including Kızılırmak, Yeşilırmak, Melet, Pazarsuyu, Aksu, Harşit, Değirmendere, Solaklı, İyidere, Büyükdere, Fırtına, Çağlayan and Kapistre.The highest annual average values for electrical conductivity (EC), reactive phosphate (o-PO4), ammonium (NH4), nitrite (NO2), sulphate (SO4) and hardness were determined as 1.16 ±0.29 mS/cm, 0.81±0.66 µM, 11.6±10.4 µM, 2.83±3.1 µM, 333±74 mg/L ve 407±47 mg CaCO3, respectively, in Kızılırmak (Samsun); the highest turbidity, total suspended solids (TSS) and organic matter (as permanganate index) as 191±99 FTU, 232±137 mg/L and 4.12±2.14 mg O/L respectively in Değirmendere (Trabzon); the highest silicate concentration in Melet (Ordu) as 305±47 µM; the highest nitrate concentration in İyidere (Rize) as 124±79 µM; and the highest chlorophyll-a levels in Yeşilırmak (Samsun) as 1.98±1.70 µg/L. As a result of cluster analyses, it was established that Kızılırmak river is in a group different from that of other rivers in terms of sulfate, hardness and electrical conductivity and the rivers situated in eastern part of the region is more acidic than those in the west in terms of pH. Data obtained from the study were evaluated according to Water Quality criteria and water quality classes of the rivers were identified by parameters.Keywords: Eastern Black Sea, river, nutrient levels, physico-chemical levels, land based pollutants. Physico-Chemical Characteristics and Nutrient Levels of the Eastern Black Sea Rivers ÖzetBu çalışma, Doğu Karadeniz'e dökülen, akarsulardan ortalama debileri yaklaşık 10 m 3 /sn ve üzerinde olan Kızılırmak, Yeşilırmak, Melet, Pazarsuyu, Aksu, Harşit, Değirmendere, Solaklı, İyidere, Büyükdere, Fırtına, Çağlayan ve Kapistre deresinin fizikokimyasal karakteristikleri ve besin elementi düzeylerinin belirlenmesi amacıyla aylık periyotlarla gerçekleştirilmiştir. Parametrelere ait yıllık ortalama değerler incelendiğinde en yüksek EC, o-PO4, NH4, NO2, SO4 ve sertlik değerleri sırasıyla 1,16 ±0.29 mS/cm, 0,81±0.66 µM, 11,6±10,4 µM, 2,83±3.1 µM, 333±74 mg/L ve 407±47 mg CaCO3 olarak Kızılırmak nehrinde, en yüksek Turbidite, toplam askıda katı madde ve permanganat indeksi değerlerinin 191±99 FTU, 232±137 mg/L ve 4,12±2,14 mg O/L olarak Değirmendere deresinde, en yüksek silikat (Si) değerlerinin 305±47 µM olarak Melet ırmağında, en yüksek nitrat derişimlerinin 124±79 µM olarak İyidere deresinde ve en yüksek klorofil-a değerleri ise 1,98±1,70 µg/L olarak Yeşilırmak nehrinde belirlenmiştir. Sınıflandırma analizleri sonucunda, sülfat, sertlik ve elektriksel iletkenlik yönünden Kızılırmak nehrinin diğer akarsulardan farklı bir sınıfta yer aldığı, pH yönüyle ise bölgenin doğusundaki akarsuların batıdakilere gore daha asidik özellik taşıdığı belirlenmiştir Çalışmada elde edilen veriler Su Kalite kriterlerine göre değerlendirilmiş ve parametrelere göre akarsular...

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Seasonal variations of dissolved inorganic nutrients transported to the Linjiang Bay of the Three Gorges Reservoir, China

Cited by 24 publications

References 22 publications

Assessment of water quality of Rawal Lake by long-time monitoring

Assessment of water quality of Rawal Lake by long-time monitoring

Assessment of geo-hazards in a rapidly changing landscape: the three Gorges Reservoir Region in China

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