Characteristics of nutrient retention in a stormwater wetland during dry and wet days

2010 ◽  
Vol 61 (6) ◽  
pp. 1535-1545 ◽  
Author(s):  
Qitao Yi ◽  
Weiwei Lu ◽  
Jianghua Yu ◽  
Youngchul Kim
Keyword(s):  
Nitrogen Concentration ◽  
Soluble Reactive Phosphorus ◽  
Nitrogen Retention ◽  
Nutrient Retention ◽  
Base Flow ◽  
Agricultural Watershed ◽  
Storm Flow ◽  
Reactive Phosphorus ◽  
Improved Design ◽  
Rainy Days

A 0.23-ha pilot wetland was constructed to examine its effectiveness for the control of nonpoint source pollution (NPS) from a 7.42-ha agricultural watershed in Korea. The wetland was operated during base flow and storm flow conditions and monitored for four years (2006–2009). The wetland was operated under high hydraulic loading rates (HLRs, 0.78 m/day on average) during rainy days. The average influent nitrogen concentration was 9.8 mg/L during wet days, but around 11.6 mg/L during dry days. Due to the short hydraulic retention time (HRT) on wet days, nitrogen retention at the wetland was poor, only 6.1%; whereas, during dry days the efficiency was higher, around 17.9%. On rainy days, the wetland presented high retention for total phosphorus (TP), with an average efficiency of 68.3%, accompanied with a total suspended solids (TSS) removal of 84.7%. However, on dry days, the wetland showed positive soluble reactive phosphorus (SRP) retention other than TP. The interior of the wetland was observed to have different nutrients levels. Furthermore, suggestions are addressed in terms of improved design for better performance.

Removal patterns of particulate and dissolved forms of pollutants in a stormwater wetland

2010 ◽  
Vol 61 (8) ◽  
pp. 2083-2096 ◽  
Author(s):  
Qitao Yi ◽  
Jianghua Yu ◽  
Youngchul Kim
Keyword(s):  
Nonpoint Source Pollution ◽  
Soluble Reactive Phosphorus ◽  
Nonpoint Source ◽  
Base Flow ◽  
Agricultural Watershed ◽  
Loading Rates ◽  
Average Value ◽  
Storm Flow ◽  
Reactive Phosphorus ◽  
Rainy Days

A 0.23-ha pilot wetland was constructed to examine its effectiveness for the control of nonpoint source pollution (NPS) from a 7.42-ha agricultural watershed in Korea. This research emphasised the removal patterns of particulate and dissolved forms of pollutants on both dry (base flow) and wet days (storm flow). The hydraulic loading rates were high on rainy days, with an average value of 0.78 m/day, but around 0.08 m/day on dry days. Particulate forms of pollutants, such as TSS, COD and TP, were removed to a greater extent on wet days due to sedimentation. On wet days, the incoming concentrations of NH4-N and soluble reactive phosphorus (SRP) were higher than during dry days, and can be partly retained via filtration and adsorption as they go through the wetland. The retention of TP and TSS on dry days could be affected by short antecedent dry days (ADDs), which will cause frequent hydraulic fluctuations in the wetland. Nitrogen removal is not influenced by this condition, with an average retention of around 20% on dry days, higher than the 6% removal on wet days.

Effect of geomorphological setting and rainfall on nutrient exchange in mangroves during tidal inundation

2010 ◽  
Vol 61 (10) ◽  
pp. 1197 ◽  
Author(s):  
María Fernanda Adame ◽  
Bernardino Virdis ◽  
Catherine E. Lovelock
Keyword(s):  
Soluble Reactive Phosphorus ◽  
Nutrient Retention ◽  
Nutrient Concentrations ◽  
Tidal Inundation ◽  
Nutrient Exchange ◽  
Tidal Cycles ◽  
Negative Impacts ◽  
Reactive Phosphorus ◽  
Riverine Mangroves

One of the key ecosystem services provided by mangroves is their role in mediating nutrient exchange, thereby protecting coastal ecosystems from negative impacts of nutrient enrichment. In this study, we tested whether geomorphological setting and level of rainfall affect the intensity and direction of nutrient exchange. Our hypotheses were that tidal mangroves retain more nutrients than riverine mangroves and that nutrient retention is stronger during periods of high rainfall. Concentrations of soluble reactive phosphorus (SRP), nitrogen oxides (NOx–-N) and ammonium (NH4+) were measured from water entering and leaving the mangroves during tidal cycles. Our results show that nutrient concentrations were higher in the flood tide compared with the ebb tide by up to 28% for NOx–-N, 51% for SRP and 83% for NH4+, suggesting retention by the mangroves. Geomorphological setting determined nutrient exchange to some extent, with some riverine sites receiving more nutrients than tidal sites and thus, being more important in nutrient retention. Rainfall was important in determining nutrient exchange as it enhanced SRP and NH4+ retention. These results show that mangroves can improve water quality of creeks and rivers, and underscore the need for conservation of mangroves over a range of geomorphological settings.

scholarly journals Nutrients retention in a small subtropical wetland (México)

2016 ◽  
Vol 75 (s1) ◽  
Author(s):  
Martha B. Rendón-López ◽  
M. Luisa Suarez Alonso ◽  
Gloria L. Ayala-Ramirez ◽  
Yazmin Hernández-Linares ◽  
Alberto Gómez-Tagle Chavez ◽  
...  
Keyword(s):  
Suspended Solids ◽  
Hydrological Cycle ◽  
Soluble Reactive Phosphorus ◽  
Nutrient Retention ◽  
Dry Period ◽  
Rainy Period ◽  
Subtropical Wetland ◽  
Macrophyte Community ◽  
Tropical Areas ◽  
Reactive Phosphorus

<p>In tropical areas very few studies have analysed wetlands’ ability to control nutrients. We analysed the efficiency of the Pátzcuaro subtropical wetland in Mexico to retain nutrients (total phosphorus: TP; soluble reactive phosphorus: PO<sub>4</sub><sup>3-</sup>, nitrite: NO<sub>2</sub><sup>-</sup> and nitrate: NO<sub>3</sub><sup>-</sup>) and total suspended solids (TSS) and its temporal variability from November 2011 to October 2012, where two hydrological different periods (dry and wet periods) were included. The results indicate that, annually, this wetland reduced TP, 30.4%; PO<sub>4</sub><sup>3-</sup>, 19.2%; NO<sub>2</sub><sup>-</sup>, 2.5%; NO<sub>3</sub><sup>-</sup>, 17.6%; and TSS, 14.7%. However, the reduction % rose to 55.3% for TP and to 47.3% for PO<sub>4</sub><sup>3-</sup> during the dry period and to 14.1 % for NO<sub>2</sub><sup>-</sup>, 49% for NO<sub>3</sub><sup>-</sup> and 44.5% for TSS during the rainy period. These results show dependence on the hydrological cycle, although P retention is also related with uptake by a dense macrophyte community and with organic matter accumulation. The results obtained suggest that removal of N is due mainly to denitrification. TSS retention seems to respond to low speed hydraulics and the resistance generated by macrophytes roots and floating plants. Like other studies in temperate environments, this wetland seems to remove more efficiently P than N. Unlike that  in temperate environments where the highest nutrient retention occurs in autumn, we found the highest retention values for both NO<sub>2</sub><sup>-</sup> and NO<sub>3</sub><sup>-</sup> during summer (rainy period), and the lowest for P, probably due to release of P for the senescence of wetland plants during this period.   </p>

Cover crops and precipitation influence soluble reactive phosphorus losses via tile drain discharge in an agricultural watershed

2020 ◽  
Vol 34 (23) ◽  
pp. 4446-4458
Author(s):  
Matt T. Trentman ◽  
Jennifer L. Tank ◽  
Todd V. Royer ◽  
Shannon L. Speir ◽  
Ursula H. Mahl ◽  
...  
Keyword(s):  
Cover Crops ◽  
Soluble Reactive Phosphorus ◽  
Agricultural Watershed ◽  
Reactive Phosphorus ◽  
Phosphorus Losses

scholarly journals Limnological Notes on Ramsagar, Dinajpur, Bangladesh

2012 ◽  
Vol 41 (1) ◽  
pp. 119-121 ◽  
Author(s):  
Moniruzzaman Khondker ◽  
Md Almujaddade Alfasane ◽  
Md Ataul Gani ◽  
Md Shafiqul Islam
Keyword(s):  
Phytoplankton Biomass ◽  
Nitrate Nitrogen ◽  
Nitrogen Concentration ◽  
Soluble Reactive Phosphorus ◽  
Mean Value ◽  
Total Density ◽  
Artificial Lake ◽  
Chl A ◽  
Blue Green Algae ◽  
Reactive Phosphorus

Ramsagar, an artificial lake of Dinajpur district has been investigated limnologically. Mean alkalinity, DO, pH, TDS and conductivity of the lake were 0.50 meq/l, 7.99 mg/l, 6.73, 10.66 mg/l and 73.66 ?S/cm, respectively. The concentration of soluble reactive phosphorus and silicate was very low. Mean value of the former parameter was 3.16 ?g/l and the latter was 0.77 mg/l. Nitrate-nitrogen concentration was < 0.1 mg/l. Phytoplankton biomass as chl a was 5.92 ?g/l and that of phaeopigment 3.65 ?g/l. Phytoplankton flora of the lake was found to be dominated by desmids. The dominant species were Staurastrum coarctatum var. subcurtum (59.35×104, ind/l); S. subgracillimum var. tortum (44.83×104 ind/l) and S. leptacanthum (29.06×104 ind/l). Among the blue-green algae, Anabaena utermöhlii was dominant. Chlorococcales was represented by seven species. The total density of phytoplankton was 163.53×104 ind/l. Considering the overall limnological characteristics, the lake could be characterized as acidic and nutrient poor.DOI: http://dx.doi.org/10.3329/bjb.v41i1.11091 Bangladesh J. Bot. 41(1): 119-121, 2012 (June)

scholarly journals Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1947
Author(s):  
Ling Su ◽  
Chen Zhong ◽  
Lei Gan ◽  
Xiaolin He ◽  
Jinlei Yu ◽  
...  
Keyword(s):  
Suspended Solids ◽  
Soluble Reactive Phosphorus ◽  
Particulate Phosphorus ◽  
Modified Bentonite ◽  
Combined Application ◽  
Water And Sediment ◽  
Phosphorus Form ◽  
Labile P ◽  
Reactive Phosphorus ◽  
Polyaluminium Chloride

The application of lanthanum modified bentonite (Phoslock®) and polyaluminium chloride (PAC) is popular in the restoration of European temperate lakes; however, the effects of the application on the concentrations of phosphorus (P) in both the water and the sediments have been poorly evaluated to date. We studied the effects of the application of Phoslock® + PAC on the concentrations of total phosphorus (TP), particulate phosphorus (PP), soluble reactive phosphorus (SRP), total suspended solids (TSS) and chlorophyll a (Chla) in the water, and different P forms in the sediments, in an isolated part of Lake Yanglan. The results showed that the concentrations of TP, PP, SRP, TSS and Chla decreased significantly after the addition of Phoslock® + PAC. Moreover, the concentrations of labile-P, reductant-soluble-P and organic-P in the sediments were also significantly decreased after the Phoslock® + PAC application. However, the concentrations of both the stable apatite-P and residual-P in the sediments after application of Phoslock® + PAC were much higher than the pre-addition values, while the concentrations of metal-oxide-P did not differ significantly between the pre- and post- application conditions. Our findings imply that the combined application of Phoslock® and PAC can be used in the restoration of subtropical shallow lakes, to reduce the concentrations of P in the water and suppress the release of P from the sediments.

scholarly journals Seasonal Variations of Phosphorus Species in the Overlying and Pore Waters of the Tuohe River, China

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Qing Xu ◽  
Xiaoping Yu ◽  
Yafei Guo ◽  
Tianlong Deng ◽  
Yu-Wei Chen ◽  
...  
Keyword(s):  
Seasonal Variations ◽  
Yangtze River ◽  
Algal Bloom ◽  
Soluble Reactive Phosphorus ◽  
Pore Waters ◽  
Phosphorus Species ◽  
Dissolved Phosphorus ◽  
Vertical Distributions ◽  
Reactive Phosphorus ◽  
Main Factor

Overlying sediment and pore waters were collected in summer and winter at upstream (Jintang) and downstream (Neijiang) sites of the Tuohe River, which is one of the five largest tributaries of the Yangtze River in China. Phosphorus species, including soluble reactive phosphorus (SRP), soluble unreactive phosphorus (SUP), and total dissolved phosphorus (TDP), and some diagenetic constituents including dissolved Fe(II), Mn(II), and sulfide in overlying and pore waters, were measured systematically. The seasonal variations and vertical distributions of phosphorus species in overlying and pore waters at both sampling sites were obtained to elucidate some aspects of the transport and transformations of phosphorus. Based on the profiles of pore and overlying waters as well as the TDN/TDP data during an algal bloom in 2007, it was clearly demonstrated that phosphorus was the main factor limiting the phytoplankton growth in the Tuohe River.

Impact of hydro-sedimentary processes on the dynamics of soluble reactive phosphorus in the Seine River

2014 ◽  
Vol 122 (2-3) ◽  
pp. 229-251 ◽  
Author(s):  
Lauriane Vilmin ◽  
Najla Aissa-Grouz ◽  
Josette Garnier ◽  
Gilles Billen ◽  
Jean-Marie Mouchel ◽  
...  
Keyword(s):  
Soluble Reactive Phosphorus ◽  
Sedimentary Processes ◽  
Seine River ◽  
Reactive Phosphorus

Changes in Nutrient Levels of Lake Water Stored at 4 °C

1984 ◽  
Vol 41 (6) ◽  
pp. 985-988 ◽  
Author(s):  
A. H. El-Shaarawi ◽  
M. A. Neilson
Keyword(s):  
Statistical Analysis ◽  
Lake Water ◽  
Water Samples ◽  
Soluble Reactive Phosphorus ◽  
Lake Ontario ◽  
The Other ◽  
Nutrient Levels ◽  
Glass Bottles ◽  
Reactive Phosphorus

Water samples were collected on Lake Ontario during April and November, filtered (0.45 μm), and immediately analyzed onboard ship for the nutrients soluble reactive phosphorus, nitrate-plus-nitrite, and ammonia. Replicates were stored in glass bottles at 4 °C and reanalyzed within 8 d. Statistical analysis showed that soluble reactive phosphorus decreased by 11 and 13% and nitrate-plus-nitrite by 7 and 6%, whereas ammonia increased by 75% on one cruise and decreased by 37% on the other.

Sign in / Sign up

Export Citation Format

Share Document