Nutrients in the Changjiang River

Shen, Zhongrong; Liu, Qun

doi:10.1007/s10661-008-0334-2

Cited by 66 publications

(58 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2b) with high nitrate concentrations and N / P ratios (Shen and Liu, 2009). Excess N was found throughout the entire water column except the bottom of the peripheral plume (Figs.…”

Section: P-limitation Potential From System Aspectmentioning

confidence: 91%

Joint effect of freshwater plume and coastal upwelling on phytoplankton growth off the Changjiang River

Tseng¹,

Lin

Dai

et al. 2014

Biogeosciences

View full text Add to dashboard Cite

show abstract

“…2b) with high nitrate concentrations and N / P ratios (Shen and Liu, 2009). Excess N was found throughout the entire water column except the bottom of the peripheral plume (Figs.…”

Section: P-limitation Potential From System Aspectmentioning

confidence: 91%

Joint effect of freshwater plume and coastal upwelling on phytoplankton growth off the Changjiang River

Tseng¹,

Lin

Dai

et al. 2014

Biogeosciences

View full text Add to dashboard Cite

show abstract

“…Several studies report water quality data from the Yangtze River mostly focusing on inorganic parameters (e.g., Yang et al 2004;Müller et al 2008Müller et al , 2012Shen and Liu 2009;Ran et al 2010). Data on organic compounds in Yangtze surface water are comparatively rare.…”

mentioning

confidence: 99%

Occurrence and distribution of organic trace substances in waters from the Three Gorges Reservoir, China

Wolf

Bergmann

Wilken

et al. 2013

Environ Sci Pollut Res

View full text Add to dashboard Cite

This study deals with the evaluation of water quality of the Three Gorges Reservoir (TGR) in order to assess its suitability as a raw water source for drinking water production. Therefore, water samples from (1) surface water, (2) tap water, and (3) wastewater treatment plant effluents were taken randomly by 2011-2012 in the area of the TGR and were analyzed for seven different organic contaminant groups (207 substances in total), applying nine different analytical methods. In the three sampled water sources, typical contaminant patterns were found, i.e., pesticides and polycyclic aromatic hydrocarbons (PAH) in surface water with concentrations of 0.020-3.5 μg/L and 0.004-0.12 μg/L, disinfection by-products in tap water with concentrations of 0.050-79 μg/L, and pharmaceuticals in wastewater treatment plant effluents with concentrations of 0.020-0.76 μg/L, respectively. The most frequently detected organic compounds in surface water (45 positives out of 57 samples) were the pyridine pesticides clopyralid and picloram. The concentrations might indicate that they are used on a regular basis and in conjunction in the area of the TGR. Three-and four-ring PAH were ubiquitously distributed, while the poorly soluble five-and six-ring members, perfluorinated compounds, polychlorinated biphenyls, and polybrominated diphenyl ethers, were below the detection limit. In general, the detected concentrations in TGR are in the same range or even lower compared to surface waters in western industrialized countries, although contaminant loads can still be high due to a high discharge. With the exception of the two pesticides, clopyralid and picloram, concentrations of the investigated organic pollutants in TGR meet the limits of the Chinese Standards for Drinking Water Quality GB 5749 (Ministry of Health of China and Standardization Administration of China 2006) and the European Union (EU) Council Directive 98/83/EC on the quality of water intended for human consumption (The Council of the European Union 1998), or rather, the EU Directive on environmental quality standards in the field of water policy (The European Parliament and The Council of the European Union 2008). Therefore, the suggested use of surface water from TGR for drinking water purposes is a valid option. Current treatment methods, however, do not seem to be efficient since organic pollutants were detected in significant concentrations in purified tap water.

show abstract

“…Our measurements may exclude significant inputs of N and P from fertilizer and manure runoff and sewage and stormwater overflow, sources which rival or dwarf natural fluxes in many other rivers (Howarth et al, 1996;Boyer et al, 2006;Shen and Liu, 2008;Alvarez-Cobelas et al, 2009)…”

Section: Global and Historical Context Of Current Resultsmentioning

confidence: 99%

Spatial and temporal dynamics of biogeochemical processes in the Fraser River, Canada : a coupled organic-inorganic perspective

Voß¹

2014

View full text Add to dashboard Cite

The great geologic and climatic diversity of the Fraser River basin in southwestern Canada render it an excellent location for understanding biogeochemical cycling of sediments and terrigenous organic carbon in a relatively pristine, large, temperate watershed. Sediments delivered by all tributaries have the potential to reach the ocean due to a lack of main stem lakes or impoundments, a unique feature for a river of its size. This study documents the concentrations of a suite of dissolved and particulate organic and inorganic constituents, which elucidate spatial and temporal variations in chemical weathering (including carbonate weathering in certain areas) as well as organic carbon mobilization, export, and biogeochemical transformation. Radiogenic strontium isotopes are employed as a tracer of sediment provenance based on the wide variation in bedrock age and lithology in the Fraser basin. The influence of sediments derived from the headwaters is detectable at the river mouth, however more downstream sediment sources predominate, particularly during high discharge conditions. Bulk radiocarbon analyses are used to quantify terrestrial storage timescales of organic carbon and distinguish between petrogenic and biospheric organic carbon, which is critical to assessing the role of rivers in long-term atmospheric CO 2 consumption. The estimated terrestrial residence time of biospheric organic carbon in the Fraser basin is 650 years, which is relatively short compared to other larger rivers (Amazon, Ganges-Brahmaputra) in which this assessment has been performed, and is likely related to the limited floodplain storage capacity and non-steadystate post-glacial erosion state of the Fraser River. A large portion of the dissolved inorganic carbon load of the Fraser River (>80%) is estimated to derive from remineralization of dissolved organic carbon, particularly during the annual spring freshet when organic carbon concentrations increase rapidly. This thesis establishes a baseline for carbon cycling in a largely unperturbed modern mid-latitude river system and establishes a framework for future process studies on the mechanisms of organic carbon turnover and organic matter-mineral associations in river systems.

show abstract

Nutrients in the Changjiang River

Cited by 66 publications

References 39 publications

Joint effect of freshwater plume and coastal upwelling on phytoplankton growth off the Changjiang River

Joint effect of freshwater plume and coastal upwelling on phytoplankton growth off the Changjiang River

Occurrence and distribution of organic trace substances in waters from the Three Gorges Reservoir, China

Spatial and temporal dynamics of biogeochemical processes in the Fraser River, Canada : a coupled organic-inorganic perspective

Contact Info

Product

Resources

About