Seasonality and water quality trends in a maturing recreated reed bed

McCartney, Matthew; Stratford, Charlie; Neal, Colin; Bradford, R. B.; Mills, S J; Johnson, Mark S.

doi:10.1016/s0048-9697(03)00105-0

Cited by 7 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…H istorically , trend analysis was conducted to evaluate change in water quality over time using various parametric or nonparametric techniques (Lettenmaier et al, 1991; Lietz, 2000; Donohue et al, 2001; Richards and Baker, 2002). Seasonality is often the major exogenous effect that must be compensated for or removed to discern trends in water quality since seasonal variation is observed for most water quality constituents in surface waters (Hirsch et al, 1982; Hirsch et al, 1991; Graham and Li, 1994; Champely and Doledec, 1997; McCartney et al, 2003). Previous studies generally dealt with seasonality by using nonparametric techniques (e.g., Seasonal Kendall test) or other methods that incorporated seasonal terms during trend analysis of water quality constituents (Hirsch et al, 1991; Helsel and Hirsch, 1992).…”

mentioning

confidence: 99%

Seasonality of Selected Surface Water Constituents in the Indian River Lagoon, Florida

et al. 2007

View full text Add to dashboard Cite

Seasonality is often the major exogenous effect that must be compensated for or removed to discern trends in water quality. Our objective was to provide a methodological example of trend analysis using water quality data with seasonality. Selected water quality constituents from 1979 to 2004 at three monitoring stations in southern Florida were evaluated for seasonality. The seasonal patterns of flow-weighted and log-transformed concentrations were identified by applying side-by-side boxplots and the Wilcoxon signed-rank test (p < 0.05). Seasonal and annual trends were determined by trend analysis (Seasonal Kendall or Tobit procedure) using the U.S. Geological Survey (USGS) Estimate TREND (ESTREND) program. Major water quality indicators (specific conductivity, turbidity, color, and chloride), except for turbidity at Station C24S49, exhibited significant seasonal patterns. Almost all nutrient species (NO(2)-N, NH(4)-N, total Kjeldahl N, PO(4)-P, and total P) had an identical seasonal pattern of concentrations significantly greater in the wet than in the dry season. Some water quality constituents were observed to exhibit significant annual or seasonal trends. In some cases, the overall annual trend was insignificant while opposing trends were present in different seasons. By evaluating seasonal trends separately from all data, constituents can be assessed providing a more accurate interpretation of water quality trends.

show abstract

mentioning

confidence: 99%

Seasonality of Selected Surface Water Constituents in the Indian River Lagoon, Florida

et al. 2007

View full text Add to dashboard Cite

show abstract

“…Although these are the dominant controls, heterotrophic organisms may influence conductivity through the release or uptake of dissolved substances (Madigan et al, 1997). The maintenance of the relatively high conductivities observed suggests some reaction between the carbonate minerals in the sediment and the water column (McCartney et al, 2003). The large diurnal variations in dissolved oxygen of up to 150% in the summer of 2000 suggest conditions of high productivity with high rates of photosynthesis during the day.…”

Section: Discussionmentioning

confidence: 91%

“…Rainfall, with a typical conductivity of 25 µS cm 1 , and surface runoff carried by the Glastonbury Canal during high flows such as when it over topped its banks, both have a diluting effect and cause a drop in conductivity. By contrast, carbonate-rich groundwater inputs such as the water carried by the Glastonbury Canal in low flow conditions have a higher conductivity (average winter value of 903 µS cm 1 and summer value of 782 µS cm McCartney et al, 2003)) and when they entered phase 1 through a broken pipe (August and September 2001) they caused an increase in conductivity. Although these are the dominant controls, heterotrophic organisms may influence conductivity through the release or uptake of dissolved substances (Madigan et al, 1997).…”

Section: Discussionmentioning

confidence: 98%

“…In June 2000, monitoring was initiated at Hamwall, a constructed reed bed in an area of formerly worked-out peat, in response to reported fish kills. This work builds on earlier studies carried out by CEH Wallingford looking at the hydrology of reed bed creation (Gilman et al, 1998) and at water quality trends (McCartney et al, 2003). While McCartney et al (2003) discuss fortnightly nutrient data, this paper presents data on the temporal variations in continuous dissolved oxygen and pH measurements.…”

Section: Introductionmentioning

confidence: 83%

See 1 more Smart Citation

Seasonal and diurnal hydro-chemical variations in a recreated reed bed

Stratford

McCartney

Williams

2004

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

The widespread loss and degradation of UK wetlands over the last 200 years has resulted in a loss of habitat for wading and migrating birds To help stem this decline, wetland areas are now being preserved and where possible created. This study investigated water quality in a recreated reed bed in south-west England designed specifically to provide habitat for birds. Since June 2000, continuous measurements of temperature, pH, electrical conductivity and dissolved oxygen have been logged. These data enable the partial pressure of CO 2 to be calculated. This paper looks at the data collected up to November 2001. Despite similar solar radiation and water temperature conditions in both 2000 and 2001, peak summertime values of dissolved oxygen dropped from >100% to <50% and pH values dropped from >7.7 to <7.2. Both also show a reduction in diurnal variation. Over the same period, the average partial pressure of CO 2 increased from 19.7 to 56.1. Analysis of the diurnal dissolved oxygen curves indicates a decrease in photosynthesis which, in the absence of a change in nutrient concentrations in the water, may result from surface plant growth or from a reduction in submerged plant cover. The implications of these changing hydro-chemical conditions are that the site will be less able to support such a wide diversity of aquatic fauna, which will reduce the effectiveness of the site as a habitat for some bird species.

show abstract

“…Επιπλέον παράγοντες, όπως το βάθος του νερού, η θερµοκρασία, η συγκέντρωση των αλάτων στην υδάτινη στήλη, αλλά και ο ρυθµός αποικοδόµησης της νεκρής οργανικής ύλης, επηρεάζουν σηµαντικά το pH των υδάτινων οικοσυστηµάτων. Για παράδειγµα, έχει αποδειχτεί ότι η µείωση της στάθµης του νερού στα υδάτινα οικοσυστήµατα συνοδεύεται από αύξηση του pH σε αυτά, λόγω του µεγαλύτερου ρυθµού φωτοσύνθεσης (Neal et al 1998, McCartney et al 2003.…”

Section: αποτελέσµατα αναλύσεων νερούunclassified

Οικολογία Των Τύπων Οικοτόπων Της Αποξηραμένης Λίμνης Μουριάς

Καραγιάννη¹

View full text Add to dashboard Cite

Seasonality and water quality trends in a maturing recreated reed bed

Cited by 7 publications

References 16 publications

Seasonality of Selected Surface Water Constituents in the Indian River Lagoon, Florida

Seasonality of Selected Surface Water Constituents in the Indian River Lagoon, Florida

Seasonal and diurnal hydro-chemical variations in a recreated reed bed

Οικολογία Των Τύπων Οικοτόπων Της Αποξηραμένης Λίμνης Μουριάς

Contact Info

Product

Resources

About