Concentrations and characteristics of organic carbon in surface water in Arizona: influence of urbanization

Westerhoff, Paul; Anning, David W.

doi:10.1016/s0022-1694(00)00292-4

Cited by 122 publications

(91 citation statements)

References 24 publications

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“…Organic matter of size less than <0.45μm, commonly referred to as dissolved organic carbon has a significant impact on water quality. It absorbs and reacts with sunlight energy, complexes metals, provides an energy source for microorganisms and associates with hydrophobic substances such as hydrocarbons (Westerhoff and Anning, 2000). It plays a major role in the transport and bioavailability of metals and hydrocarbons through complexation reactions.…”

Section: Discussionmentioning

confidence: 99%

Understanding the role of land use in urban stormwater quality management

Goonetilleke

Thomas

Ginn³

et al. 2005

Journal of Environmental Management

290

144

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Urbanisation significantly impacts on water environments with increased runoff and the degradation of water quality. The management of quantity impacts are straight forward, but quality impacts are far more complex. Current approaches to safeguard water quality are largely ineffective and guided by entrenched misconceptions with a primary focus on 'end-of-pipe' solutions. The outcomes of a research study presented in the paper, which investigated relationships between water quality and six different land uses offer practical guidance in the planning of future urban developments. In terms of safeguarding water quality, high density residential development which results in a relatively smaller footprint would be the preferred option. The research study outcomes bring into question a number of fundamental concepts and misconceptions routinely accepted in stormwater quality management. The research findings confirmed the need to move beyond customary structural measures and identified the key role that urban planning can play in safeguarding urban water environments.Keywords: multivariate analysis, stormwater quality management, urban water quality, water quality impacts 3

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Section: Discussionmentioning

confidence: 99%

Understanding the role of land use in urban stormwater quality management

Goonetilleke

Thomas

Ginn³

et al. 2005

Journal of Environmental Management

290

144

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“…CDOM was characterised for DOCspecific absorbance (Rostan and Cellot, 1995;Westerhoff and Anning, 2000) and spectral slope (Vodacek et al, 1997). As DOC-specific absorbance we adopted the ratio A 1 (254nm) DOC −1 between the absorption coefficient at 254 nm (cm −1 ) and the DOC value (g C L −1 ) (Oliveira et al, 2006).…”

mentioning

confidence: 99%

Photochemical production of organic matter triplet states in water samples from mountain lakes, located below or above the tree line

Laurentiis¹,

Minella²,

Maurino³

et al. 2012

Chemosphere

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davide.vione@unito.it (D.V.). AbstractThe production of triplet states (T*) of chromophoric dissolved organic matter (CDOM), reacting with the probe molecule 2,4,6-trimethylphenol (TMP) was measured upon irradiation of water samples, taken from lakes located in a mountain area (NW Italy) between 1450 and 2750 m above sea level. The lakes are located below or above the tree line and surrounded by different vegetation types (trees, alpine meadows or exposed rocks). The most photoactive samples belonged to lakes below the tree line and their fluorescence spectra and CDOM optical features suggested the presence of a relatively elevated amount of humic (allochthonous) material. The lowest (negligible) photoactivity was found for a lake surrounded by exposed rocks. Its CDOM showed an important autochthonous contribution (due to in-lake productivity) and considerably higher spectral slope compared to the other samples, suggesting low CDOM molecular weight and/or aromaticity.Among the samples, CDOM photoactivity (measured as the rate of TMP-reactive T* photoproduction) decreased with changing vegetation type in the order: trees, meadows, rocks. It 3 could be connected with decreasing contribution from catchment runoff and increasing contribution from autochthonous processes and possibly precipitation.

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“…Internationally, the roles of dissolved organic matter in the global biogeochemical carbon cycle, on biological processes in hydroecosystems, in reduction of pollutant toxicity and flows of DOC have been investigated (Depetris and Kempe, 1993;Pettine et al, 1998;Westerhoff and Anning, 2000;Arvola et al, 2004;Evans et al, 2005). However, the observed organic matter trends are quite contradictory; most studies show increasing DOC trends (Evans et al, 2005;Roulet and Moore, 2006;Vuorenmaa et al, 2006), but significant decreasing trends have also been found (Arvola et al 2004).…”

Section: Introductionmentioning

confidence: 99%