Nutrient Exports and Land Use in Australian Catchments

Young, William J.; Marston, Frances; Davis, R. J.

doi:10.1006/jema.1996.0043

Cited by 118 publications

(87 citation statements)

References 14 publications

(24 reference statements)

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“…These values are higher compared to those of the present study, probably due to the application rates in Dommel area (448 kg N/ha-yr and 76 kg P/ha-yr), which exceeded the rates in our study area. However, the export coefficients of Chryssoupolis plain and Dommel area are consistent with the literature values, which range from 3.2 to 33.3 kg/ha-yr (median value 7.9) for nitrogen, and from 0.2 to 6.8 kg/ha-yr (median value 1.44) for phosphorus (Frinc 1991;Young et al 1996).…”

Section: Estimation Of Nutrient Loads From Non-point Sources Into Thesupporting

confidence: 90%

Water Quality of Drainage Canals and Assessment of Nutrient Loads Using QUAL2Kw

Gikas

2014

Environ. Process.

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The water quantity and quality in two of the four main drainage canals located in the plain of Chryssoupolis in Kavala, North Greece, are studied. The area is intensively used for agriculture. Irrigation water is supplied by Nestos River, using a network of irrigation canals. Drainage water and irrigation return flows are collected in the four main drainage canals, which outflow into the Thracian Sea, North Aegean. A monitoring program in the four canals was designed to monitor flow and main constituents of drainage water. Main pollutants included nitrate, phosphorus and suspended solids. Based on the collected data, the trophic state of the canals and its seasonal variation were assessed, and the limiting nutrient was identified. QUAL2Kw was also used to model flow and water quality in two of the four canals. The calibration and verification of QUAL2Kw was undertaken using the collected field data, in an effort to identify the pollution sources and propose future management actions for the improvement of drainage canal water quality. The results showed that QUAL2Kw is a useful tool to simulate water quality in rivers and canals, and to quantify the impacts of non-point source pollution from agricultural areas.

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Section: Estimation Of Nutrient Loads From Non-point Sources Into Thesupporting

confidence: 90%

Water Quality of Drainage Canals and Assessment of Nutrient Loads Using QUAL2Kw

Gikas

2014

Environ. Process.

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“…A comprehensive analysis of land use-nutrient export relationships was made by Beaulac and Reckhow (1982), in which nutrient export coefficients were established for row and non-row crops, pasture and grazing land, manure storage areas from feedlots, mixed agricultural watersheds and urban areas. A compilation of nutrient export coefficients (termed nutrient generation rates) for the major land-use types, forest, grazing, cropping, horticulture and urban areas, was published by Young et al (1996) for both Australian and international locations. However, these relationships were generally from temperate areas and few measurements were included from tropical river catchments.…”

Section: Introductionmentioning

confidence: 99%

Relationships between land use and nutrient concentrations in streams draining a 'wet-tropics' catchment in northern Australia

Mitchell

Reghenzani²,

Faithful

et al. 2009

Mar. Freshwater Res.

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Abstract. Differences in stream nutrient concentrations typically reflect upstream differences in land use. In particular, nitrate concentrations are greatly increased by losses from nitrogen (N) fertiliser applied to areas of intensive cropping. In the present study, a relationship between the area of such land use and the nitrate concentrations in the receiving streams was predicted. This relationship was tested using several data sets from the Tully basin, in the wet-tropics bioregion of north Queensland, Australia. The proportions of fertiliser-additive land use (FALU), mostly sugarcane and bananas, were correlated with the concentrations of nutrients in streams that drain these land uses. The data compared included two longterm sampling studies in the Tully River catchment and more recent, broader catchment sampling and plot-scale studies in this region. A strong relationship was shown for nitrate, but weaker relationships were observed for other N-nutrient and P-nutrient forms. Comparisons were made with contemporary and historical land-use changes in the Tully basin. The strong relationship of FALU with nitrate provides evidence that the nitrate exports from this catchment are largely derived from fertiliser use. This relationship can be used to derive nitrate run-off coefficients for fertilised land use in catchment models or to monitor changes following management to reduce fertiliser usage.

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“…The factors which control the loading rate of N, P and Si into rivers are dissimilar. Due to landuse changes towards more agricultural and urban uses, the total amounts of N and P exported rise rapidly (Young et al, 1996).…”

Section: Article Infomentioning

confidence: 99%