Effects of hydrological processes on the chemical composition of riverine suspended sediment in the Zhujiang River, China

Gao, Qiuming; Zuyi, Tao; Xie, Mingwei; Cui, Kunyan; Feng, Zeng

doi:10.1002/hyp.1246

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Due to lack of data, however, many large Asian rivers, such as the Zhujiang River and the Mekong River, are not included in the global carbon cycling budget. Recently, some researchers have carried out the studies on the riverine biogeochemistry and carbon transport of the Zhujiang River [5][6][7][8][9][10] , and provided a first estimation for its contribution. However, due to large seasonal change in hydrological aspects of the river and low sampling frequency, the results are rather indefinite.…”

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confidence: 99%

The impacts of ‘05.6’ extreme flood event on riverine carbon fluxes in Xijiang River

et al. 2007

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An extreme flood event with a frequency of nearly 200 year occurred in June of 2005 in the Xijiang River, the main trunk stream of the Zhujiang River. Samples were systematically collected during the flood event, and water quality parameters, including total suspended sediment (TSS), dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), and particulate organic carbon (POC) were analyzed, and riverine carbon concentrations associated with its changing pattern through the flood process were discussed. These parameters reflect the changes in basin surface flow and subsurface flow during the flood. This flood event influenced annual flux estimations of POC, DOC, and DIC to great extents. Based on carbon flux estimations for the year 2005 and the flood event (June 21-28) in the Xijiang River, it was found that DIC, DOC, and POC fluxes during '05.6' flood event are 1.52×10 6 g.km −2 .a −1 , 0.24×10 6 g.km −2 .a −1 , and 0.54×10 6 g.km −2 .a −1 , and account for 14.87%, 24.75% and 44.89% of the annual fluxes in 2005, respectively. The results suggested that carbon exports during extreme flood events had great contributions to the total carbon fluxes and composition of various carbon components, being important for accurate estimates of annual carbon fluxes in rivers with frequent floods. Xijiang River, flood, riverine carbon flux

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confidence: 99%

The impacts of ‘05.6’ extreme flood event on riverine carbon fluxes in Xijiang River

et al. 2007

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“…The (C/N) sus. values of Beijiang and Xijiang were derived from literature (Gao et al 2003). The values, as reported in July 1997 and February 1998, were 14.44 at the Sanshui hydrological station in Beijiang and 15.22 at the Makou hydrological station in Xijiang.…”

Section: Sources Of Oc In Water and Sedimentmentioning

confidence: 99%

Estimation of carbon sink fluxes in the Pearl River basin (China) based on a water–rock–gas–organism interaction model

et al. 2014

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Carbon sequestration resulting from carbonate rock weathering is closely linked to the global carbon cycle and has turned out to be important in the adjustment of atmospheric CO 2 levels. Traditional karst dynamic models based on water-rock-gas interactions underestimate carbon sink fluxes related to carbonate rock weathering because they ignore the utilization of dissolved inorganic carbon (DIC) by aquatic organisms. In this study, a new model based on water-rock-gas-organism interactions was applied in the Pearl River basin, China, to recalculate atmospheric CO 2 consumption and to develop an accurate estimation model for carbon sink fluxes at catchment scale. Stable carbon isotope (d 13 C) and C/N ratios were used in the counting processes. Data were collected from published literature as well as through field investigation and laboratory analysis. Results show that the Pearl River carbon sink in the Pearl River is 4.31 9 10 9 kg/a, i.e., 15.8 9 10 9 kg of atmospheric CO 2 per year. Of this, the carbon sink resulting from carbonate rock weathering amounts to 2.14 9 10 9 kg/a, i.e., 49.7 % of the total. The three largest tributaries of Pearl River, Dongjiang, Beijiang, and Xijiang, respectively absorb 0.5 9 10 9 , 1.19 9 10 9 , and 2.62 9 10 9 kg of carbon from the atmosphere annually, accounting for 12, 28 and 60 % of the river's total carbon sink. When compared with the results of previous researches that disregarded the role of aquatic organisms, the new calculation method provides a carbon sink flux value that is 1.2-3.3 times higher, and 1.6 times higher on an average. To improve the calculation accuracy of atmospheric CO 2 consumption in global karstic rivers, further research is needed regarding carbon sequestration mechanisms that involve aquatic organisms.

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“…Water quality studies and hydrogeochemistry research have been conducted in rivers located in various regions around the world (Martin and Meybeck, 1979;Rogers, 1989;Nordstrom et al, 1989;Banks et al, 1995;Kumar et al, 1998;Gaillardet et al, 1999;Hillier, 2001;Picouet et al, 2002;Schafer and Blanc, 2002;Depetris et al, 2003;Gao et al, 2003). Surface and ground waters cause weathering of mineral, ore and rocks in the hydrogeological cycle and modify the chemical composition of river waters due to the mobilized ions of decomposed rocks and minerals.…”

Section: Introductionmentioning

confidence: 98%

Water quality and hydrogeochemical characteristics of the River Buyukmelen, Duzce, Turkey

Pehlivan

Yilmaz

2005

Hydrological Processes

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Abstract:The River Buyukmelen is located in the province of Duzce in northwest Turkey and its water basin is approximately 470 km 2 . The Aksu, Kucukmelen and Ugursuyu streams flow into the River Buyukmelen. It flows into the Black Sea with an output of 44 m 3 s 1 . The geological succession in the basin comprises limestone and dolomitic limestone of the Yılanlı formation, sandstone, clayey limestone and marls of the Akveren formation, clastics and volcano-clastics of the Caycuma formation, and cover units comprised of river alluvium, lacutrine sediments and beach sands. The River Buyukmelen is expected to be a water source that can supply the drinking water needs of Istanbul until 2040; therefore, it is imperative that its water quality be preserved.The samples of rock, soil, stream water, suspended, bed and stream sediments and beach sand were collected from the Buyukmelen river basin. They were examined using mineralogical and geochemical methods. The amount of suspended sediment in the River Buyukmelen in December 2002 was 120 mg l 1 . The suspended and bed sediments in the muddy stream waters are formed of quartz, calcite, plagioclase, clay (kaolinite, illite and smectite), muscovite and amphibole minerals. As, Co, Cd, Cr, Pb, Ni, Zn and U have all accumulated in the Buyukmelen riverbed sediments. The muddy feature of the waters is related to the petrographic features of the rocks in the basin and their mineralogical compositions, as most of the sandstones and volcanic rocks (basalt, tuffite and agglomerate) are decomposed to a clay-rich composition at the surface. Thus, the suspended sediment in stream waters increases by physical weathering of the rocks and water-rock interaction. Owing to the growing population and industrialization, water demand is increasing. The plan is to bring water from the River Buyukmelen to Istanbul's drinking-water reservoirs. According to the Water Pollution Regulations, the River Buyukmelen belongs to quality class 1 based on Hg, Cd, Pb, As, Cu, Cr, Zn, Mn, Se, Ba, Na C , Cl , and SO 2 4 ; and to quality class 3 based on Fe concentration. The concentration of Fe in the River Buyukmelen exceeds the limit values permitted by the World Health Organization and the Turkish Standard. Because water from the River Buyukmelen will be used as drinking water, it will have an adverse effect on water quality and humans if not treated in advance. In addition, the inclusion of Mn and Zn in the Elmali drinking-water reservoir of Istanbul and Fe in the River Buyukmelen water indicates natural inorganic contamination. Mn, Zn and Fe contents in the waters are related to geological origin. Moreover, the River Buyukmelen flow is very muddy in the rainy seasons and it is inevitable that this will pose problems during the purification process.

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Effects of hydrological processes on the chemical composition of riverine suspended sediment in the Zhujiang River, China

Cited by 6 publications

References 22 publications

The impacts of ‘05.6’ extreme flood event on riverine carbon fluxes in Xijiang River

The impacts of ‘05.6’ extreme flood event on riverine carbon fluxes in Xijiang River

Estimation of carbon sink fluxes in the Pearl River basin (China) based on a water–rock–gas–organism interaction model

Water quality and hydrogeochemical characteristics of the River Buyukmelen, Duzce, Turkey

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