Spatial variability in sediment phosphorus characteristics along a hydrological gradient upstream of Lake Rotorua, New Zealand

Peryer-Fursdon, Jamie; Abell, Jonathan Michael; Clarke, Dylan; Özkundakci, Deniz; Hamilton, David P.; Pearson, Lisa K.

doi:10.1007/s12665-014-3508-y

Cited by 17 publications

(11 citation statements)

References 41 publications

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“…From this result proved the good texture sediment grains have the well uniformity of sediment sorted. According to [9], the higher rate of discharge would indicate the size of the coarser sediments, which negative phi value [20]- [22]. There was a strong correlation between the size or skewness of sediment grains and discharge of the value R² = 0.9899, the discharge conditions in this study area have and caused on the size of the sediment grains (Fig.…”

Section: Resultsmentioning

confidence: 79%

Assessment of Total Suspended Sediment and Bed Sediment Grains in Upstream Areas of Lata Berangin, Terengganu

Wahab¹,

Kamarudin²,

Gasim³

et al. 2016

International Journal on Advanced Science, Engineering and Information Technology

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The amount of suspended sediment yield and the size of sediment grains an indicator of hydrological cycle, especially in the river. The sediment transportation process is one of the measurements of water resources management. Equilibrium of the river depends on the flow rate of water and by several factors such as frequency of rainfall, climate changes and land use activities that changes then effected to the river flow. Sedimentation problems occur in reservoirs, rivers, lakes, flood plains and offshore. This study was carried out in the upstream area, Lata Berangin, Hulu Keruak, Besut, Terengganu. This study was implemented to prove the sedimentation problem, especially the formation of total suspended sediment (TSS) and the bed sediment grain size. There are three important parameters were quantified in this study such as the distribution of sediment grain size (phi), TSS (mg/L) and the river discharge values (Q) (m³/s). The technique of analysis of primary data obtained which determine the bed sediment grain size according with the procedure of Gerald and Kenneth and the phi (ϕ) value in this study using the scale Udden-Wentworth that included median, mean, standard deviation, skewness, kurtosis and the Gravimetric Method used to analyze the concentration TSS is the Gravimetric Method. From the result, the highest TSS up to 6.0 mg/L which is categorized under the class I, based on the National Water Quality Standard. Overall, the estimated daily-suspended sediment load values up to 1.1649 tonne/day at Station 2. Then, from the statistics for the median, mean, standard deviation, skewness and kurtosis showed that the size of sediment falls between phi-0.30φ to phi-1.00 φ which classified as very coarse and the majority of the sediment texture and a very leptokurtic, leptokurtic texture showed sedimentation production is not so high. Overall, the sedimentation problem in Lata Berangin, Hulu Keruak still in stable level. Most of this upstream area still not developed as land use activities around the river basin.

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Section: Resultsmentioning

confidence: 79%

Assessment of Total Suspended Sediment and Bed Sediment Grains in Upstream Areas of Lata Berangin, Terengganu

Wahab¹,

Kamarudin²,

Gasim³

et al. 2016

International Journal on Advanced Science, Engineering and Information Technology

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“…However, sedimentary TP at other sample points didn't increase year by year, with eutrophication growing seriously and TP in overlying water increasing in CL of Taihu (Duan et al 2015), and the similar unchanged trend of TP in sediment cores was found in the east part of CL (Yuan et al 2014), maybe resulting from the following three reasons: First, increased TP in overlying water in recent years tends to stay in aquatic organisms (Yuan et al 2014) and recycle at sedimentwater interface (Jiang et al 2008) instead of accumulating stably and permanently in sediment, due to relatively more bioavailable forms of TP in water than before, closely related to increasingly serious eutrophication (Dong et al 2008). Second, increases in TP and primary production in overlying water lead to more phosphorus in finer fractions of surface sediment (Kowalkowski et al 2015) and larger maximum buffering capacity of recent sediment than that of old sediment (Peryer-Fursdon et al 2015), rather than changes in sedimentary TP concentration. Furthermore, solid particles with non-labile phosphorus in overlying water unrelated with aquatic organisms and eutrophication in the past were ready to sink at those parts with lake currents and sedimentary TP in some parts of CL even exceeded that in the northern bays (e.g.…”

Section: Resultsmentioning

confidence: 99%

Using sedimentary phosphorus/nitrogen as indicators of shallow lake eutrophication: concentrations or accumulation fluxes

Zhang

Shan

2015

Environ Earth Sci

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Inland lakes have been suffering from eutrophication and nutrient sedimentation plays an important role in the eutrophication history of shallow lakes. Sedimentation processes and accumulation fluxes of nutrients were studied in the Central Lake zone (CL) of Taihu Lake (Taihu), a large shallow lake in China, with multisampling by the 210 Pb dating method and determination of sediment mass accumulation rates (MARs) and sedimentary phosphorus, nitrogen, carbon and iron concentrations, in order to track the anthropogenic eutrophication history of Taihu and to explore the available sedimentary indicators of trophic states of shallow lakes. It was found that MARs in CL varied from 0.016-0.048 to 0.078-0.339 g cm -2 a -1 with a turning point in 1980, corresponding to the rapid developing trend of society and economy in Taihu Basin after 1980. Rather than sedimentary nutrient concentrations, nutrient accumulation fluxes increased by 0.6-7.1-fold (P) and 2.3-12.2-fold (N) acting as paleolimnological indicators for the eutrophication explosion of Taihu since 1980. Yearly elevated TN in sediment cores and more greatly increased N accumulation fluxes than P with 350-1906 t a -1 in recent years (2009)(2010)(2011)(2012), suggest that nitrogen should get more attention to control for eutrophication risk of Taihu in future. There were spatial differences in nutrient accumulation fluxes and in weights of MARs and sedimentary nutrient concentrations contributing to the nutrient accumulation fluxes in CL. TOC in modern sediment (\1 m), responsible for increments in sedimentary P/Fe and TN and nutrient accumulation fluxes, acts as a key factor for controlling nutrient sedimentation and needs studies further for nutrient mass balance theory in Taihu.

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“…Legacies of P from over‐fertilisation of pastoral land, which propagate through to stream and lake sediments (Peryer‐Fursdon et al . ), impact from wastewater discharges to lakes, and nitrate build‐up in aquifers, mean that it may take many years or decades for lake trophic status to equilibrate to nutrient mitigation efforts in catchments (Morgenstern et al . ).…”

Section: Future Challenges To Lake Restorationmentioning

confidence: 99%

“…The potential for synergistic effects of climate change and land-use intensity on lake eutrophication (Hamilton et al 2013) suggests that mitigation for these effects may need to be increased beyond current restoration targets. Legacies of P from over-fertilisation of pastoral land, which propagate through to stream and lake sediments (Peryer-Fursdon et al 2015), impact from wastewater discharges to lakes, and nitrate build-up in aquifers, mean that it may take many years or decades for lake trophic status to equilibrate to nutrient mitigation efforts in catchments . These time lags are particularly relevant to volcanic regions where groundwater dominates stream baseflows (e.g.…”

Section: Future Challenges To Lake Restorationmentioning

confidence: 99%

Lake Restoration in New Zealand

Hamilton¹,

Collier²,

Howard‐Williams³

2016

Eco Management Restoration

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Spatial variability in sediment phosphorus characteristics along a hydrological gradient upstream of Lake Rotorua, New Zealand

Cited by 17 publications

References 41 publications

Assessment of Total Suspended Sediment and Bed Sediment Grains in Upstream Areas of Lata Berangin, Terengganu

Assessment of Total Suspended Sediment and Bed Sediment Grains in Upstream Areas of Lata Berangin, Terengganu

Using sedimentary phosphorus/nitrogen as indicators of shallow lake eutrophication: concentrations or accumulation fluxes

Lake Restoration in New Zealand

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