Gas release from a reservoir in the filling stage

Matvienko, Bohdan; Sikar, Elizabeth; Rosa, Luiz Pinguelli; Santos, Marco Aurélio dos; Filippo, R. De; Cimbleris, André C. P.

doi:10.1080/03680770.1998.11901469

Cited by 14 publications

(11 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gaseous nitrogen (N 2 ) was estimated monthly by two analyses: diffusive and bubbling (Matvienko et al 2001). For the first, we evaluated the diffusion at the air-water interface by the balance method with the aid of a diffusion chamber, during the day (between 10:00-12:00 h) and at night (between 22:00-24:00 h).…”

Section: Nitrogen Budgetmentioning

confidence: 99%

Nitrogen budget in integrated aquaculture systems with Nile tilapia and Amazon River prawn

2017

View full text Add to dashboard Cite

The present work aims to describe the nitrogen (N) budget in integrated aquaculture systems with Nile tilapia (Oreochromis niloticus) and Amazon River prawn (Macrobrachium amazonicum) in earthen ponds, with and without the addition of different substrates. The experimental design was completely randomized, with three treatments (without a substrate, with a geotextile fabric substrate, and with a bamboo substrate) and four replications. Diet was the major input of N in the systems, ranging from~65 to 71% and followed by inlet water (~26-31%). The portion retained in reared animals and periphyton ranged from~21 to 25% (being~21-24% in fish and prawns). The outputs that contributed most to the accumulation and release of N were, respectively, sediment (~24-38%) and N2 (~30-36%) emitted to the atmosphere. The addition of substrates did not improve the accumulation of nitrogen in the biomass of the target species. This suggests that the periphyton had a minor role on feed availability. In general, the systems were not efficient in using nitrogen since only~22% of all available nitrogen was retained into prawn and tilapia biomass. On the other hand, the emission of N 2 (an inert gas) to the atmosphere almost compensated the nitrogen supplied in the diet that was not assimilated by the reared animals and periphyton. In addition, data suggest that the integrated aquaculture in stagnant ponds may sequester substantial amounts of nitrogen from nutrient-rich aquatic environments and could be used as a mitigation tool.

show abstract

Section: Nitrogen Budgetmentioning

confidence: 99%

Nitrogen budget in integrated aquaculture systems with Nile tilapia and Amazon River prawn

2017

View full text Add to dashboard Cite

show abstract

“…On the basis of a limited amount of measurements, Saint Louis et al (2000) have estimated that artificial reservoirs worldwide could emit 64 Mt yr −1 CH 4 . Methane emission studies have been conducted in the tropical latitudes (Duchemin et al , 2000; Matvienko et al , 2000; Delmas et al , 2001), Canadian northern latitudes (Kelly et al , 1997; Duchemin et al , 2000), western United States (Soumis et al , 2004) and northern boreal zone of Finland (Huttunen et al , 2002, 2003). A comparison of the findings indicates clearly that CH 4 emissions should be analysed on a case‐by‐case basis because significant variations can occur from one hydro plant to the next (Rosa et al , 2004).…”

Section: Introductionmentioning

confidence: 99%

Spatial–temporal variations of methane emissions from the Ertan hydroelectric reservoir in southwest China

Zheng

Zhao

et al. 2010

Hydrological Processes

View full text Add to dashboard Cite

Abstract:Methane emissions from hydroelectric reservoirs can comprise a considerable portion of anthropogenic methane. However, lack of data on CH 4 emissions in different geographical regions and high spatial-temporal variability in the emission rates of reservoirs has led to uncertainties regarding regional emission estimates of CH 4 . In the subtropical plateau climate region, we used the Ertan hydroelectric reservoir as a study area. The CH 4 flux at the air-water interface was assessed by floating chambers and factors influencing emissions, including the distance from the dam, water depth, seasonal variation in wet and dry season, air-water temperature gradient and wind speed, and was also studied through a year-long systematic sampling and monitoring experiment. The results showed that the surface of the reservoir was a source of CH 4 during the sampling period and the annual average CH 4 flux was 2Ð80 š 1Ð52 mg m 2 d 1 . CH 4 flux (and its variation) was higher in the shallow water areas than in the deep-water areas. CH 4 flux near the dam was significantly higher than that of other locations farther from the dam in the dry season. The seasonal variations of CH 4 emission in wet and dry seasons were minor and significant diurnal variations were observed in wet and dry seasons. Exponential relationships between the CH 4 flux and air-water temperature gradient were found. Air-water temperature gradient was an important factor influencing diurnal variations of CH 4 flux in the Ertan hydroelectric reservoir. These results indicate that systematic sampling is needed to better estimate CH 4 flux through coverage of the spatial variation of different water depths, measuring-point distance from the dam, seasonal variation in wet and dry seasons and changes in climate factors (such as air-water temperature gradient). Our results also provide a fundamental parameter for CH 4 emission estimation of global reservoirs.

show abstract

“…When addressing the issue of reservoir emissions in the context of the Americas, one must recall that data from the literature belong to the Canadian northern latitudes [ Kelly et al , 1994; Duchemin et al , 1995; Kelly et al , 1997; Schellhase et al , 1997; Duchemin , 2000] and tropical latitudes (Brazil [ Rosa and Schaeffer , 1994; Duchemin et al , 2000; Matvienko et al , 2000; Tavares de Lima et al , 2000]; French Guyana [ Galy‐Lacaux et al , 1997, 1999; Delmas et al , 2001]; and Panama [ Keller and Stallard , 1994]. Since the magnitude of GHG emissions from reservoirs is known to be partly governed by regional features such as geology, climate, and type of flooded soils and vegetation [ WCD , 2000a], these previous studies may not properly depict the case of reservoirs located in temperate countries such as the United States.…”

Section: Introductionmentioning

confidence: 99%

Greenhouse gas emissions from reservoirs of the western United States

Soumis

Duchemin

Canuel

et al. 2004

Global Biogeochemical Cycles

130

106

View full text Add to dashboard Cite

[1] Six reservoirs located in the Western United States (F. D. Roosevelt, Dworshak, Wallula, Shasta, Oroville, and New Melones) were sampled in order to estimate their greenhouse gas (GHG) emissions. Two types of fluxes were assessed: (1) diffusive fluxes of methane (CH 4 ) and carbon dioxide (CO 2 ) at the air/water interface and (2) degassing fluxes of CH 4 and CO 2 from water passing through the turbine spillways. Diffusive flux measurements indicated that the surface of the reservoirs were a source of CH 4 during the sampling period (from +3.2 to +9.5 mg CH 4 m À2 d À1 ). Oroville (+1026 mg CO 2 m À2 d À1 ) and Shasta (+1247 mg CO 2 m À2 d À1 ) surfaces were also sources of CO 2 . In contrast, the surface of all the other reservoirs constituted sinks for CO 2 (from À349 to À1195 mg CO 2 m À2 d À1 ). Degassing fluxes ranged from +0.003 to +0.815 t CH 4 d À1 , and from +16 to +324 t CO 2 d À1 . Daily GHG budgets ranged from +0.146 to +2.228 t CH 4 d À1 , and from À15 to +224 t CO 2 d À1 . Degassing fluxes represented an important term of these budgets. A significant correlation was observed between the magnitude of CO 2 diffusive fluxes and the water pH (R 2 = 0.81; p < 0.0001). All other correlations between GHG diffusive fluxes and independent variables tested were weak and/or not significant. Finally, while attempting to resolve the spatial variability in diffusive fluxes, we were able to cluster reservoirs neither according to geological nor ecological criteria.

show abstract

Gas release from a reservoir in the filling stage

Cited by 14 publications

References 5 publications

Nitrogen budget in integrated aquaculture systems with Nile tilapia and Amazon River prawn

Nitrogen budget in integrated aquaculture systems with Nile tilapia and Amazon River prawn

Spatial–temporal variations of methane emissions from the Ertan hydroelectric reservoir in southwest China

Greenhouse gas emissions from reservoirs of the western United States

Contact Info

Product

Resources

About