Lake Wabamun eutrophication study /

Mitchell, P. A.; Alberta.,

doi:10.5962/bhl.title.110500

Cited by 1 publication

(2 citation statements)

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“…The lake lies in a shallow depression formed by past glaciation and is a designated wildlife reserve. Anoxic conditions predominate in the hypolimnion of the lake resulting in a high rate of release of P from sediments (internal P loading) to middle and upper lake water, especially during and resulting from mixing (Mitchell & Burns 1981;Robertson 1988).…”

Section: Site Descriptionmentioning

confidence: 99%

“…The Lake Hayes catchment is good example of a high-country agricultural/pastoral catchment in New Zealand where P is thought to be the primary cause of eutrophication of the lake in the past (Mitchell & Burns 1981;Robertson 1988;Burns 1995;Otago Regional Council 1995). The catchment is 48 km 2 , near Queenstown in the South Island of New Zealand (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Spatial and temporal variability of stream phosphorus in a New Zealand high‐country agricultural catchment

Caruso¹

2000

New Zealand Journal of Agricultural Research

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Spatial and temporal variability of stream total phosphorus (TP) concentrations and loadings was evaluated over a year in a high-country agricultural catchment. One storm event was also sampled at the inflow to a lake. An upland tributary had the highest median concentration (0.064 mg T 1 ), but the maximum (0.614 mg I" 1 ) occurred at the inflow during the storm. Values near the lake surface were low but increased with depth in summer. There was a large difference between two streams, and values exceeded water quality guidelines in several locations. Seasonality in concentrations was not evident. Mean and median loadings at the inflow were approximately 7000 and 680 g day -1 , respectively, and the maximum was 81 540 g day -1 during the storm. TP loadings to the lake during a synoptic survey were 470 g day -1 or 13 g km -2 day -1 . The lower half of the catchment contributed 72% of the loading to the lake. Baseflow, snowmelt, and one storm accounted for 47%, 30%, and 23%, respectively, of the total annual loading. Fertiliser, livestock waste, and trampling of stream banks by livestock contribute to the problem and can be minimised though use of best management practices in areas identified in this study.

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Section: Site Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%