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Littérature scientifique sur le sujet « Natural and constructed wetlands »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Natural and constructed wetlands"

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Kennedy, Gavin, et Tatiana Mayer. « Natural and Constructed Wetlands in Canada : An Overview ». Water Quality Research Journal 37, no 2 (1 mai 2002) : 295–325. http://dx.doi.org/10.2166/wqrj.2002.020.

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Abstract A review of freshwater wetland research in Canada was conducted to highlight the importance of these ecosystems and to identify wetland research needs. Both natural and constructed wetland systems are discussed. Natural wetlands are an important part of the Canadian landscape. They provide the habitat for a broad variety of flora and fauna and contribute significantly to the Canadian economy. It is estimated that the total value derived from consumptive and non-consumptive activities exceeds $10 billion annually. The past decades have witnessed the continued loss and degradation of wetlands in Canada. In spite of recent protection, Canadian wetlands remain threatened by anthropogenic activities. This review shows that more research on fate and transport of pollutants from urban and agricultural sources in wetland systems is needed to better protect the health and to assure the sustainability of wetlands in Canada. Furthermore, improved knowledge of hydrology and hydrogeochemistry of wetlands will assure more effective management of these ecosystems. Lastly, better understanding of the effect of climate change on wetlands will result in better protection of these important ecosystems. Constructed wetlands are man-made wetlands used to treat non-point source pollution. The wetland treatment technology capitalizes on the intrinsic water quality amelioration function of wetlands and is emerging as a cost-effective, environmentally friendly method of treating a variety of wastewaters. The use of wetland technology in Canada is, however, less common than in the U.S.A. A number of research needs has to be addressed before the wetland treatment technology can gain widespread acceptance in Canada. This includes research pertaining to cold weather performance, including more monitoring, research on design adaptation and investigation of the effects of constructed wetlands on wildlife.
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Gopal, Brij. « Natural and Constructed Wetlands for Wastewater Treatment : Potentials and Problems ». Water Science and Technology 40, no 3 (1 août 1999) : 27–35. http://dx.doi.org/10.2166/wst.1999.0130.

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Wetlands are being considered increasingly important for wastewater treatment because of the ability of many wetland plants to absorb large amounts of nutrient and a variety of toxic substances. The paper highlights the physical, chemical and biological processes which contribute to the improvement of water quality, and the distinction between natural and constructed wetlands. The impacts of long-term wastewater disposal on the biotic changes, reduction in treatment efficiency, and wetland processes such as production of trace gases, are pointed out. Constraints in using wetlands, for wastewater treatment, such as poor understanding of the natural wetland functions and responses of native plants and animals to wastewater, particularly in developing countries, are briefly discussed. It is suggested that while the possibilities for using constructed wetlands based on native species for small communities are explored, greater emphasis should be laid on the restoration of lost and degraded wetlands, especially the river floodplains, lake littorals and coastal wetlands, which can help check pollution from non-point sources.
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Sukhla, Prof Saurabh M., Mr Khatik Sufiyan Jameel, Mr Prasad Abhishek Ramesh, Mr Satpute Nikhil Bhairavnath, Mr Pawar Pravin Surendra, Mr Mitthe Mayur Ramnath, Prof Prashant G. Chavan et Prof Pravin S. Chavanke. « Wastewater Treatment Using Constructed Wetland System ». International Journal for Research in Applied Science and Engineering Technology 10, no 5 (31 mai 2022) : 1303–6. http://dx.doi.org/10.22214/ijraset.2022.42463.

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Abstract: Natural wetland such as marshes ,swamps and bogs protect water quality . constructed or artificial wetland system mimic the treatment that occurs in natural wetlands by rellyilng on plants and a combination of naturally occurring biological , chemical and physical processes to remove pollutants from water . As of 1999,there were more than 500 constructed wetland in Europe and 600 in north America . constructed wetland are a less energy intensive and more environmentally sound way of treating waste water and conserving potable water . The first single family home constructed wetland in southern Nevada was completed Eighth years ago. A constructed wetland (CW) is an artificial wetland to treat sewage, greywater, stormwater runoff or industrial wastewater. It may also be designed for land reclamation after mining, or as a mitigation step for natural areas lost to land development constructed wetlands also act as a biofilter and/or can remove a range of pollutants (such as organic matter, nutrients, pathogens, heavy metals) from the water. Constructed wetlands are designed to remove water pollutants such as suspended solids, organic matter and nutrients (nitrogen and phosphorus).
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Berego, Yohannes Seifu, Solomon Sorsa Sota, Mihret Dananto Ulsido et Embialle Mengistie Beyene. « Treatment Performance Assessment of Natural and Constructed Wetlands on Wastewater From Kege Wet Coffee Processing Plant in Dale Woreda, Sidama Regional State, Ethiopia ». Environmental Health Insights 16 (janvier 2022) : 117863022211427. http://dx.doi.org/10.1177/11786302221142749.

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Constructed wetlands are engineered systems built to use natural processes and remove pollutants from contaminated water in a more controlled environment. The research was an experimental research carried out to assess the effectiveness of natural and constructed wetland systems in the treatment of coffee wastewater. The 2 vertical flow constructed wetland was built. The first wetland covered an area of 132 m2. It has 12 m width and 11 m length. Open space is constructed between 2 constructed wetlands with a dimension of 11 m × 3 m × 1 m. The second wetland was constructed and its function is similar to the first one, from this wetland water is discharged to the river. The construction of the wetland is accomplished by constructing 20 cm wide furrows with a spacing of 30 cm. Vetiver grasses have planted with a spacing of 20 cm intervals. The physicochemical data were recorded, organized, and analyzed using R software (version 4.1) and Microsoft Excel. Data were processed using parametric (one-way ANOVA) and nonparametric (Mann-Whitney’s U test) statistical tests of homogeneity. One-way analysis of Variance (ANOVA) was used to determine the significance of differences in variations in physicochemical variables within the constructed wetland sites. Tukey’s multiple comparisons for differences between means were also assessed. Findings indicated that a natural wetland had a mean influent and effluent of total suspended solids (TSS) of 2190.78 ± 448.46 mg/l and 972.67 ± 234.312 mg/l, respectively. A Mann-Whitney U test revealed that TSS were significantly higher in natural wetland (median = 1551.50) compared to constructed wetland (median = 922.5), U = 676.5, z = −2.435, P = .015, r = .257. Natural wetlands had a mean influent of biological oxygen demand (BOD) was 4277.94 ± 157.02 mg/l, while in the effluent of BOD it was 326.83 ± 112.24 mg/l. While in constructed wetland it was 4192.4 ± 191.3 mg/l, 782.72 ± 507.6 mg/l, and 88.28 ± 20.08 mg/l in influent, middle, and effluent respectively. Average chemical oxygen demand (COD) value at influent in natural wetlands was 8085.61 ± 536.99 mg/l and in the effluent it was 675.33 ± 201.4 mg/l. In constructed wetland, it was found to be 8409.8 ± 592.9, 1372.6 ± 387.94, and 249.0 ± 7.68 for influent, middle, and effluent respectively. Comparatively, the purification efficiency of organic pollutants (TSS, BOD, and COD) of constructed wetlands was better than natural wetlands, whereas natural wetlands had better purification efficiency of nitrogen compounds such as ammonium, nitrite, and nitrate. On average, removal rates for nitrogen compounds were 39.53% and −24.41% for ammonium, 79.44% and 55.4% for nitrite, and 68.90% and 60.6% for nitrate in natural and constructed wetlands respectively, while the phosphate removal rate was 43.17% and 58.7% in natural and constructed wetlands, respectively. A Mann-Whitney U test revealed that there is no significance difference in nitrite, nitrate, ammonium, and phosphate concentration between natural and constructed wetlands( P > .05). Based on these results, both systems of treatment were effective in treating the coffee effluent since most of the values obtained were below the permissible EEPA limits. Even though the constructed wetland treatment plant performed better overall, in comparison, the natural wetlands had better purification efficiency for nitrogen compounds like ammonium, nitrite, and nitrate and the constructed wetlands had better purification efficiency for organic pollutants (TSS, BOD, and COD).
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Saxena, Shalini. « EFFICACY OF PHRAGMITE KARKA PLANT IN CONSTRUCTED WETLAND SYSTEM ». International Journal of Research -GRANTHAALAYAH 3, no 9SE (30 septembre 2015) : 1–5. http://dx.doi.org/10.29121/granthaalayah.v3.i9se.2015.3177.

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Wetlands, either constructed or natural, offer a cheaper and low-cost alternative technology for wastewater treatment. A constructed wetland system that is specifically engineered for water quality improvement as a primary purpose is termed as a ‘Constructed Wetland Treatment System’ (CWTS). In the past, many such systems were constructed to treat low volumes of wastewater loaded with easily degradable organic matter for isolated populations in urban areas. However, widespread demand for improved receiving water quality, and water reclamation and reuse, is currently the driving force for the implementation of CWTS all over the world. Recent concerns over wetland losses have generated a need for the creation of wetlands, which are intended to emulate the functions and values of natural wetlands that have been destroyed. Natural characteristics are applied to CWTS with emergent macrophyte stands that duplicate the physical, chemical and biological processes of natural wetland systems. The number of CWTS in use has very much increased in the past few years. The use of constructed wetlands is gaining rapid interest. Most of these systems cater for tertiary treatment from towns and cities. They are larger in size, usually using surface-flow system to remove low concentration of nutrient (N and P) and suspended solids. However, in some countries, these constructed wetland treatment systems are usually used to provide secondary treatment of domestic sewage for village populations. These constructed wetland systems have been seen as an economically attractive, energy-efficient way of providing high standards of wastewater treatment by the help of Phragmite karka plant. Typically, wetlands are constructed for one or more of four primary purposes: creation of habitat to compensate for natural wetlands converted for agriculture and urban development, water quality improvement, flood control, and production of food and fiber.
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Hadidi, Luna Al. « CONSTRUCTED WETLANDS A COMPREHENSIVE REVIEW ». International Journal of Research -GRANTHAALAYAH 9, no 8 (13 septembre 2021) : 395–417. http://dx.doi.org/10.29121/granthaalayah.v9.i8.2021.4176.

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Constructed wetlands are wastewater treatment systems composed of one or more treatment cells in a building designed and constructed to provide wastewater treatment. Constructed wetlands are classified into two types: free water surface (FWS) wetlands (also known as surface flow wetlands) closely resemble natural wetlands in appearance because they contain aquatic plants that are rooted in a soil layer on the bottom of the wetland and water flows through the leaves and stems of plants. Subsurface flow wetlands (SSF) or known as a vegetated submerged bed (VSB) systems do not resemble natural wetlands because they have no standing water. They contain a bed of media (such as crushed rock, small stones, gravel, sand, or soil) that has been planted with aquatic plants. When properly designed and operated, wastewater stays beneath the surface of the media, flows in contact with the roots and rhizomes of the plants, and is not visible or available to wildlife. Constructed wetlands are an appropriate technology for areas where inexpensive land is generally available and skilled labor is less available. In this paper, a comprehensive review covered types, characteristics, design variation and considerations, limitations, and the advantages and disadvantages of constructed wetlands.
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Saxena, Shalini. « CLEAN DEVELOPMENT MECHANISM AND CARBON CYCLING OF SEWAGE WASTE BY CONSTRUCTED WETLANDS ». International Journal of Research -GRANTHAALAYAH 10, no 4 (17 mai 2022) : 209–15. http://dx.doi.org/10.29121/granthaalayah.v10.i4.2022.4517.

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Wetlands, either constructed or natural, offer a cheaper and low-cost alternative technology for wastewater treatment. A constructed wetland system that is specifically engineered for water quality improvement as a primary purpose is termed as a ‘Constructed Wetland Treatment System’ (CWTS). In the past, many such systems were constructed to treat low volumes of wastewater loaded with easily degradable organic matter for isolated populations in urban areas. However, widespread demand for improve in water quality, and water reclamation and reuse, is currently the driving force for the implementation of CWTS all over the world. Recent concerns over wetland losses have generated a need for the creation of manmade wetlands, which are intended to emulate the functions and values of natural wetlands that have been destroyed. Natural characteristics are applied to CWTS with emergent macrophyte stands that duplicate the physical, chemical and biological processes of natural wetland systems. The number of CWTS in use has very much increased in the past 50 years. The use of constructed wetlands is gaining rapid interest. Most of these systems cater for tertiary treatment from towns and cities. They are larger in size, usually using surface-flow system to remove low concentration of nutrient (N and P) and suspended solids. However, in some countries, these constructed wetland treatment systems are usually used to provide secondary treatment of domestic sewage for village populations. These constructed wetland systems have been seen as an economically attractive, energy-efficient way of providing high standards of wastewater treatment. Typically, wetlands are constructed for one or more of four primary purposes: creation of habitat to compensate for natural wetlands converted for agriculture and urban development, water quality improvement, flood control, and production of food and fiber (constructed aquaculture wetlands). In present research the sewage water is treated by constructing Horizontal sub – surface flow constructed wetland, and reed grass is used as vegetation to treat waste and make the sewage waste water clean.
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King, Susan K., et Stephen C. Richter. « Reproductive Ecology and Nesting Site Characteristics of Four-Toed Salamanders (Hemidactylium scutatum) in Natural and Constructed Upland-Embedded Wetlands on the Appalachian Plateau, Kentucky ». Diversity 14, no 11 (18 novembre 2022) : 995. http://dx.doi.org/10.3390/d14110995.

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Many forested freshwater wetlands have been altered or destroyed, and wetlands are constructed to offset loss. However, they do not always replace the function of natural wetlands. It is important to understand how features of the habitat differ between types of wetlands and whether constructed wetlands provide an adequate habitat for species adapted to natural wetlands. Our objectives were to measure the characteristics of Four-toed Salamanders’ nesting habitat and determine which factors contribute to the abundance of eggs and nests in natural and constructed upland-embedded wetlands within a ridgetop ecosystem in eastern Kentucky. We located and examined characteristics for 207 nests in twelve wetlands and measured variables at the nest level and at the wetland level. The best predictor of the number of eggs and number of nests was amount of moss at the wetland. These measures of reproductive effort were similar between types of wetlands, but the number of eggs per nest was higher in constructed wetlands and inversely related to amount of moss, highlighting a deficit in nesting habitat. Research of embryonic and larval survival is needed but based on data from other amphibian species in this system, we predict that the survival of Four-toed Salamanders’ larvae is low in constructed wetlands with permanent hydrology. Restoration of constructed wetlands should address the need for moss as nesting substrate and drying of the wetland to reduce the abundance and diversity of predators of larvae.
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Jethwa, Dr Kruti B. « A Review on Design Basis for Constructed Wetlands for Wastewater Treatment ». International Journal for Research in Applied Science and Engineering Technology 9, no VIII (15 août 2021) : 373–77. http://dx.doi.org/10.22214/ijraset.2021.37163.

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Since last few years Constructed Wetlands (CWs) are being used to treat secondary or tertiary municipal or domestic wastewater effluents have been recognized as an effective means of “green technology” for wastewater treatment. Constructed wetlands (CWs) provide a natural way for simple, inexpensive, and robust wastewater treatment. The idea of natural management systems is the restoration of disturbed ecosystems and their sustainability for remuneration to nature. The Constructed wetlands (CWs) are designed to copy natural wetland systems, utilizing wetland plants, soil and associated microorganisms using various biological, physicochemical processes to remove unwanted constituents from wastewater effluents. This review paper studies various types of constructed wetlands, i.e., surface or subsurface, vertical or horizontal flow and their type of operation, i.e., continuous, batch or intermittent flow, loading rate, selection of plants and wastewater characteristics that affect the treatment efficiency. The design models with their suitability for various parameters and operational conditions such as Darcy’s equation, Kadlec and Knight Model (K-C* model), Arrhenius equation, and population equivalent calculation have been discussed. Lastly, future research requirements have been considered.
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Ge, Xiu Li, Ren Qing Wang et Jian Liu. « The Comparison of the Community Features between the Constructed Wetland and the Natural Wetland in Nansi Lake ». Advanced Materials Research 518-523 (mai 2012) : 5238–43. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.5238.

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Thirteen typical plant communities were investigated in Xinxuehe constructed wetland restored for five years and in Gaolou natural wetland restored naturally for eight years. Both wetlands are located in Nansi Lake area. The species composition, coverage, aboveground biomass and biodiversity indices were compared between the communities from the constructed wetland and the natural wetland. The results showed that the constructed wetland and the natural wetland had similar emergent species and typical species of their own, however neither coverage nor aboveground biomass showed significant differences. In the meanwhile, we found that the biodiversity of natural wetland is relatively higher than the constructed wetland. For the wetland restoration and the water quality quick improving, it is suitable to use artificial ways to promote the restoration of wetlands which converted from the farmland in Nansi Lake area; in the other hand, the natural wetland restoration is more valuable for the biodiversity conservation in the long run.
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Thèses sur le sujet "Natural and constructed wetlands"

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Marron, Corin. « Photodegradation of metolachlor in natural and constructed wetlands ». Connect to resource, 2008. http://hdl.handle.net/1811/32058.

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Thomas, Jes. « Comparison of Nitrogen Retention in Wetlands With Different Depths ». Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-35907.

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The depth of constructed wetlands (CWs) significantly affects the construction investment that influences the efficiency of the CW and is an important design consideration for optimal performance. The aim of the study was to examine the influence of depth on nitrogen retention in 12 pilot scale free surface water CWs in Plönninge (56◦43 45 N, 12◦43 33 E): 6 shallow wetlands with a maximum depth of 0.5 m and 6 deeper wetlands with a maximum depth of 0.8 m. The outlet N concentration in shallow and deep wetlands were found to be significantly different (p<0.05, p= 0.017). Outlet N concentration over the months June to December in deep and shallow wetlands, was found to be significantly different (F (6,60 = 20.594, p< 0.05). and the N concentration in deep and shallow wetlands was significantly different (F (1,10) = 8.087, p<0.05). The N concentration in September was found to be significantly different from those in all other months. The first order rate constant k was calculated for shallow and deep wetlands; higher k value indicates higher nitrogen retention. The deeper wetlands had higher k values than shallow wetlands and was statistically different (p<0.05, p= 0.002) from the k values for shallow wetlands. This implies that the N retention was higher in deeper wetlands than in shallow and was the highest in September. This was most likely due to the effect of temperature and vegetation in the wetlands.
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Johannesson, Karin. « Analysis of phosphorus retention variations in constructed wetlands receiving variable loads from arable land ». Licentiate thesis, Linköping University, Linköping, Sweden, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-20140.

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Nowak, Katarzyna. « Carbon storage in free water surface constructed wetlands in southern Sweden ». Thesis, Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-45070.

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Background: Wetlands store significant amounts of carbon through plant respiration and anaerobic peat formation, however, there is little knowledge on which factors affect the carbon storage distribution within wetlands. Aims: To determine how much carbon and nitrogen wetlands can store over time and whether there are patterns of high and low carbon and nitrogen storage within wetlands. Methods: Peat samples of a defined volume, cut out from three constructed wetlands were dried, weighed and analysed for their carbon and nitrogen content. To determine whether there are any patterns in carbon and nitrogen storage distribution or differences between sampling points, their values as well as their ratios were statistically analysed using ANOVA and Kruskal-Wallis. Results: On average 48.94 t C ha-1is stored at the constructed wetland facility which equates 3.06 t C ha-1 storage per year. There is no patterns in carbon storage within wetlands, however, the C:N mass ratio is lower at the inlet suggesting that high N concentrations in inflowing water increases N content. Conclusions: The carbon storage found is significantly lower than storage at natural inland and coastal wetlands, however, similar to anthropogenically affected wetlands. Standardisation across studies through using same sampling depths, vegetation cover measurement and climate classification may help to uncover patterns in carbon storage in the future. Focus should be placed on protecting wetlands rather than restoring them as the latter often fails to restore full functionality. This is especially important for cold climate wetlands which store significantly more carbon through slower plant respiration and subsequently slower re-uptake of carbon.
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Nilsson, Josefin. « Ecosystem age affects nitrate removal in created wetlands ». Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-37233.

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This study investigates the effect of ecosystem age on the nitrate removal efficiency, nitrate removal rate and first-order area-based removal rate coefficients (both with and without temperature adjustment) of created wetlands. Data was collected from the first to eleventh year after wetland creation in an experimental wetland facility in south-west Sweden. The 18 small (22-29 m2) free water surface wetlands were divided into three groups based on initial planting: EVW (emergent vegetation wetlands), SVW (submerged vegetation wetlands) and CW (unplanted control wetlands). Summer and winter values from the 11 studied years were analysed separately in the repeated measures ANOVA. Over these 11 years the mean nitrate removal efficiency was 12 % and the mean nitrate removal rate was 0.17 g m-2 d-1. Mean removal rate coefficient (K) was 0.020 g d-1 and mean temperature adjusted removal rate coefficient (Ka) was 0.042 g d-1. The best performing wetlands were those initially planted with, and after four years almost completely covered by, emergent vegetation (EVW). This study indicates a positive correlation between wetland age and nitrate removal potential. It further indicates aging may be hastened by initial planting of wetland vegetation.
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Pellnor, Johanna. « Population dynamics of the horned grebe in constructed wetlands in Östergötland ». Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176509.

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The population size of the horned grebe, Podiceps auritus, is declining in most of the world due to loss of wetlands, deteriorating water quality and establishment of predatory fish such as pike, Esox lucius, in former fish free wetlands. The horned grebe is now globally classified as vulnerable. In this study, data on population dynamics of the horned grebe in six created wetlands in Linköpings kommun was examined together with field work carried out in three of the wetlands. The results indicate that the number of pairs and juveniles of horned grebe crash six to eight years after the wetland is created and does not recover if there is fish present. The pairs and juveniles of horned grebe decreased significantly with the increasing age of the wetland if there was pike present in the wetland. Reduction fishing and drainage of the water in two of the wetlands inhabited pike showed a small improvement in population size of the horned grebe, but the numbers ultimately declined after a few years. Reduction fishing of common roach in one wetland showed a continuing improvement in the population size of horned grebe. Other factors that affected the horned grebe negatively, was an abundance of macrophytes such as Canadian pondweed, Elodea canadensis, that makes foraging harder.
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Kjellin, Johan. « Coupled Hydrological and Microbiological Processes Controlling Denitrification in Constructed Wetlands ». Licentiate thesis, Stockholm : [Mark- och vattenteknik, Kungliga Tekniska högskolan], 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4370.

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Fang, Min. « Removal of Natural and Synthetic Steroid Hormones through Constructed Wetland Microcosm ». University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1292943388.

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Rosatti, Alessandro. « Costructed Wetlands. A biological alternative wastewater treatments and its role in the new circular economy ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21481/.

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The climate changes, the natural resources depletion, the population number increase are alarm bells for the future that must push the humanity to turn on more sustainable use of the natural resources, particularly the water. The water management must shift towards solutions acted to protect, safeguard, and sustainably use the available water resources. A new water scheme must be implemented, in which the waste paradigm must be overtaken and substituted with resource-oriented one. The Thesis aims to present the Constructed Wetland (CW) technology, an attractive green solution for wastewater treatment that nowadays is consolidated as a efficient and valid Natural Based alternative to the conventional systems. The different typologies of CWs are exposed as well as their advantages, disadvantages, and applications. The removal pollutant processes (biological, physical, and chemical processes) occurred within, are deeply analysed and the choice of the suitable vegetation species depending on the wastewater characteristic discussed. Furthermore, I give a brief overview on the European and Italian regulations before explaining in details the design (preliminary and empirical) methods. The treatment goodness and effectiveness are discussed and commented with helping of working applications. Finally, the future role of the CWs systems in circular economy approach is clarified and an overview on the water management scheme modification (from waste paradigm to resource-oriented concept) is provided. The potential applications of CWs within this new scheme are outlined and an in-depth study on recreative applications of CW (Natural Swimming Pools technology) are presented.
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Flanagan, Neal E. « Comparing ecosystem structure and function of constructed and naturally occuring wetlands : empirical field indicators and theoreticl indices ». The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1242846242.

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Livres sur le sujet "Natural and constructed wetlands"

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Vymazal, Jan, dir. Natural and Constructed Wetlands. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1.

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Jan, Vymazal, dir. Natural and constructed wetlands : Nutrients, metals and management. Leiden, Netherlands : Backhuys Publishers, 2005.

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Jan, Vymazal, et Botanický ústav (Československá akademie věd), dir. Transformations of nutrients in natural and constructed wetlands. Leiden : Backhuys, 2001.

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Jan, Vymazal, dir. Wastewater treatment, plant dynamics and management in constructed and natural wetlands. [Dordrecht : Springer, 2008.

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service), SpringerLink (Online, dir. Water and Nutrient Management in Natural and Constructed Wetlands. Dordrecht : Springer Science+Business Media B.V., 2011.

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Vymazal, Jan, dir. Water and Nutrient Management in Natural and Constructed Wetlands. Dordrecht : Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-9585-5.

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K, Olson Richard, United States. Environmental Protection Agency. Office of Research and Development. et United States. Environmental Protection Agency. Office of Wetlands, Oceans, and Watersheds., dir. Created and natural wetlands for controlling nonpoint source pollution. Boca Raton, FL : C.K. Smoley, 1993.

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Division, Alberta Environmental Assessment, dir. Guidelines for the approval and design of natural and constructed treatment wetlands for water quality improvement. Edmonton : Alberta Environmental Protection, Environmental Assessment Division, Standards and Guidelines Branch., 1998.

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Guidelines for the approval and design of natural and constructed treatment wetlands for water quality improvement. Edmonton : Alberta Environment, Environmental Service, Environmental Sciences Division, Municipal Program Development Branch, 2000.

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Vymazal, Jan, dir. Wastewater Treatment, Plant Dynamics and Management in Constructed and Natural Wetlands. Dordrecht : Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8235-1.

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Chapitres de livres sur le sujet "Natural and constructed wetlands"

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Wardrop, Denice H., M. Siobhan Fennessy, Jessica Moon et Aliana Britson. « Effects of Human Activity on the Processing of Nitrogen in Riparian Wetlands : Implications for Watershed Water Quality ». Dans Natural and Constructed Wetlands, 1–22. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_1.

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Masi, Fabio, Anacleto Rizzo, Riccardo Bresciani et Carmelo Basile. « Dairy Wastewater Treatment by a Horizontal Subsurface Flow Constructed Wetland in Southern Italy ». Dans Natural and Constructed Wetlands, 131–39. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_10.

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Haarstad, Ketil, Guro Hensel, Adam M. Paruch et Anne-Grete Buseth Blankenberg. « Phosphorus Recycling from Waste, Dams and Wetlands Receiving Landfill Leachate – Long Term Monitoring in Norway ». Dans Natural and Constructed Wetlands, 141–46. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_11.

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Nicolics, Sandra, Diana Hewitt, Girish R. Pophali, Fabio Masi, Dayanand Panse, Pawan K. Labhasetwar, Katie Meinhold et Günter Langergraber. « Application of the NaWaTech Safety and O&M Planning Approach Re-Use Oriented Wastewater Treatment Lines at the Ordnance Factory Ambajhari, Nagpur, India ». Dans Natural and Constructed Wetlands, 147–63. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_12.

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Hawes, Patrick, Theodore Hughes-Riley, Enrica Uggetti, Dario Ortega Anderez, Michael I. Newton, Jaume Puigagut, Joan García et Robert H. Morris. « Clogging Measurement, Dissolved Oxygen and Temperature Control in a Wetland Through the Development of an Autonomous Reed Bed Installation (ARBI) ». Dans Natural and Constructed Wetlands, 165–77. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_13.

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Auvinen, Hannele, Gijs Du Laing, Erik Meers et Diederik P. L. Rousseau. « Constructed Wetlands Treating Municipal and Agricultural Wastewater – An Overview for Flanders, Belgium ». Dans Natural and Constructed Wetlands, 179–207. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_14.

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Sochacki, Adam, et Korneliusz Miksch. « Performance Intensifications in a Hybrid Constructed Wetland Mesocosm ». Dans Natural and Constructed Wetlands, 209–24. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_15.

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Chen, Zhongbing, Jan Vymazal et Peter Kuschk. « Treatment of Chlorinated Benzenes in Different Pilot Scale Constructed Wetlands ». Dans Natural and Constructed Wetlands, 225–35. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_16.

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Chen, Yi, Yue Wen, Qi Zhou et Jan Vymazal. « Transformation of Chloroform in Constructed Wetlands ». Dans Natural and Constructed Wetlands, 237–45. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_17.

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Jóźwiakowski, Krzysztof, Magdalena Gajewska, Michał Marzec, Magdalena Gizińska-Górna, Aneta Pytka, Alina Kowalczyk-Juśko, Bożena Sosnowska, Stanisław Baran, Arkadiusz Malik et Robert Kufel. « Hybrid Constructed Wetlands for the National Parks in Poland – The Case Study, Requirements, Dimensioning and Preliminary Results ». Dans Natural and Constructed Wetlands, 247–65. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38927-1_18.

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Actes de conférences sur le sujet "Natural and constructed wetlands"

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Hennen, Sadie, et Jonathan M. Malzone. « HYDROSTRATIGRAPHY OF NATURAL AND CONSTRUCTED WETLANDS, DANIEL BOONE NATIONAL FOREST, KENTUCKY ». Dans 54th Annual GSA North-Central Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020nc-348232.

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Minzenberger, Lee, Ethan Sweet, Addison Bell et Jonathan M. Malzone. « COMPARING MORPHOLOGIES OF CONSTRUCTED AND NATURAL WETLANDS ON APPALACHIAN RIDGETOPS IN THE DANIEL BOONE NATIONAL FOREST ». Dans Joint 52nd Northeastern Annual Section and 51st North-Central Annual GSA Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017ne-290531.

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FAVACHO CURTY, ADRIANA. « THE CONSTRUCTED WETLANDS MAKE THE CONNECTIONS OF THE URBAN AREAS AND NATURAL LANDSCAPE, PRESERVING THE RIPARIAN ZONES ». Dans 38th IAHR World Congress. The International Association for Hydro-Environment Engineering and Research (IAHR), 2019. http://dx.doi.org/10.3850/38wc092019-1017.

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Liolios, K., V. Tsihrintzis, P. Angelidis, K. Georgiev et I. Georgiev. « Numerical simulation for horizontal subsurface flow constructed wetlands : A short review including geothermal effects and solution bounding in biodegradation procedures ». Dans APPLICATION OF MATHEMATICS IN TECHNICAL AND NATURAL SCIENCES : 8th International Conference for Promoting the Application of Mathematics in Technical and Natural Sciences - AMiTaNS’16. Author(s), 2016. http://dx.doi.org/10.1063/1.4965013.

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Lv, Xueyan, et Xiaohong Ruan. « Removal of Natural Organic Matter by Integrated Vertical-Flow Constructed Wetland ». Dans 2011 International Conference on Management and Service Science (MASS 2011). IEEE, 2011. http://dx.doi.org/10.1109/icmss.2011.5998681.

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Yoka, Getu, et Ajay Bharti. « The Potential of Sewage Treatment through Constructed Wetlands in Northeast India : A Critical Review ». Dans International Web Conference in Civil Engineering for a Sustainable Planet. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.112.30.

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The benefits of economical treatment systems and global demand for introducing sustainable way of environmental management, the Constructed Wetlands (CWs) treatment of domestic sewage is rising rapidly all over the globe. The Total nitrogen in the sewage is the summation of Organic Nitrogen, Nitrate Nitrogen, Nitrite Nitrogen and Ammonium Nitrogen. Ammonification, Matrix Adsorption, Nitrification, Denitrification, Plant Uptake and Ammonia Volatilization are the principle involved for total nitrogen removal in the treatment of sewage using CWs. This paper provides a comprehensive review by comparative analysis of effects of type and nature of flow system, wetland structures, types of Macrophyte, removal mechanisms, Aeration, Step-feeding and other key operational parameters and conditions for the enhance removal of total nitrogen in CWs.
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Swarnakar, Arvind Kumar, Samir Bajpai et Ishtiyaq Ahmad. « Geo Physicochemical Properties for Soil Base Subsurface Constructed Wetland System ». Dans International Web Conference in Civil Engineering for a Sustainable Planet. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.112.28.

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Wetland land system is the natural way for the treatment of wastewater. Constructed wetland system (CWs) is a traditional way for treatment. CWs are considered as secondary or tertiary treatment systems. CWs provide good landscape and better habitat quality for the community. Various types of media are used in Constructed Wetland Systems. Literature shows that various soils have the potential to filtration medium (in substratum) in Horizontal Flow Subsurface Constructed Wetland System (HFSCWs) for wastewater treatment. Soil should have few environmental and geo tech properties. Soil provides the root zone in rhizome network for the vegetation in CWs. Soil provides the absorbent media not only in the HFSCWs but Vertical Flow Constructed Wetland system (VFCWs) also. As per Environmental Protection Agency (EPA), various properties of filter media were described. This review base on types of commonly used wetland, filter media, plant use and geo physicochemical parameters of filter media.
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Tan, Sew Keng, M. Faris M Shah, Suriati Sufian et Pui Vun Chai. « Constructed Wetland as an Alternative to Conventional Industrial Wastewater Treatment to Promote Carbon Sequestration for Sustainable Future ». Dans International Petroleum Technology Conference. IPTC, 2023. http://dx.doi.org/10.2523/iptc-22913-ms.

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Abstract Constructed wetlands (CW) are man-made systems that mimic the natural wetlands. They can be used for various purposes, including wastewater treatment, stormwater management, and carbon sequestration. Wetlands naturally absorb and store carbon from the atmosphere, and CW can replicate this process by using plants and microorganisms to remove and store carbon from the water. Conventional wastewater treatment plants (WWTP) use more energy and contribute to carbon emissions, so many industries are looking for ways to reduce greenhouse gas (GHG) emissions. While CW have been widely used for municipal and sewage treatment, their use as an alternative or supplement to industrial wastewater treatment, particularly in the oil and gas and petrochemical industries, is limited. However, CW have the potential to promote carbon sequestration and have a lower cost of capital and operating expenses compared to conventional WWTP, while also emitting lower GHG emissions. A case study is presented for two types of system in which one is actual operating conventional WWTP in Malaysia design and operate at 60m3/d and a hybrid CW of equivalent treatment capability and capacity. The case study found that GHG emissions from a conventional WWTP were approximately 3.75 times higher than the hybrid CW system with the same treatment capacity. For a small capacity WWTP at 60m3 per day, converting the treatment system from conventional WWTP to CW will reduce approximately 45.7t CO2 eq per year based on Life Cycle Assessment (LCA) calculation. The conventional WWTP consumed much higher power especially from the air blower compared to CW where limited number of equipment is required. The additional carbon sink for CW from carbon sequestration from plant, soil decomposition and sediment has not been quantified in the LCA calculation. Hence, it is expected the actual CO2 eq emission for CW is much lesser than the conventional WWTP. With all the benefit identified and the proven success case in several places, the adoption of CW as an industrial WWTP should be widely promoted as the replacement of conventional WWTP for sustainable future.
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Tan, Sew Keng, M. Faris M Shah, Suriati Sufian et Pui Vun Chai. « Constructed Wetland as an Alternative to Conventional Industrial Wastewater Treatment to Promote Carbon Sequestration for Sustainable Future ». Dans International Petroleum Technology Conference. IPTC, 2023. http://dx.doi.org/10.2523/iptc-22913-ea.

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Abstract Constructed wetlands (CW) are man-made systems that mimic the natural wetlands. They can be used for various purposes, including wastewater treatment, stormwater management, and carbon sequestration. Wetlands naturally absorb and store carbon from the atmosphere, and CW can replicate this process by using plants and microorganisms to remove and store carbon from the water. Conventional wastewater treatment plants (WWTP) use more energy and contribute to carbon emissions, so many industries are looking for ways to reduce greenhouse gas (GHG) emissions. While CW have been widely used for municipal and sewage treatment, their use as an alternative or supplement to industrial wastewater treatment, particularly in the oil and gas and petrochemical industries, is limited. However, CW have the potential to promote carbon sequestration and have a lower cost of capital and operating expenses compared to conventional WWTP, while also emitting lower GHG emissions. A case study is presented for two types of system in which one is actual operating conventional WWTP in Malaysia design and operate at 60m3/d and a hybrid CW of equivalent treatment capability and capacity. The case study found that GHG emissions from a conventional WWTP were approximately 3.75 times higher than the hybrid CW system with the same treatment capacity. For a small capacity WWTP at 60m3 per day, converting the treatment system from conventional WWTP to CW will reduce approximately 45.7t CO2 eq per year based on Life Cycle Assessment (LCA) calculation. The conventional WWTP consumed much higher power especially from the air blower compared to CW where limited number of equipment is required. The additional carbon sink for CW from carbon sequestration from plant, soil decomposition and sediment has not been quantified in the LCA calculation. Hence, it is expected the actual CO2 eq emission for CW is much lesser than the conventional WWTP. With all the benefit identified and the proven success case in several places, the adoption of CW as an industrial WWTP should be widely promoted as the replacement of conventional WWTP for sustainable future.
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Harbowo, Danni Gathot, et Devi Nandita Choesin. « Effectiveness of a model constructed wetland system containing Cyperus papyrus in degrading diesel oil ». Dans 4TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND NATURAL SCIENCES (ICMNS 2012) : Science for Health, Food and Sustainable Energy. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4868813.

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Rapports d'organisations sur le sujet "Natural and constructed wetlands"

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Desiderati, Christopher. Carli Creek Regional Water Quality Project : Assessing Water Quality Improvement at an Urban Stormwater Constructed Wetland. Portland State University, 2022. http://dx.doi.org/10.15760/mem.78.

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Stormwater management is an ongoing challenge in the United States and the world at-large. As state and municipal agencies grapple with conflicting interests like encouraging land development, complying with permits to control stormwater discharges, “urban stream syndrome” effects, and charges to steward natural resources for the long-term, some agencies may turn to constructed wetlands (CWs) as aesthetically pleasing and functional natural analogs for attenuating pollution delivered by stormwater runoff to rivers and streams. Constructed wetlands retain pollutants via common physical, physicochemical, and biological principles such as settling, adsorption, or plant and algae uptake. The efficacy of constructed wetlands for pollutant attenuation varies depending on many factors such as flow rate, pollutant loading, maintenance practices, and design features. In 2018, the culmination of efforts by Clackamas Water Environment Services and others led to the opening of the Carli Creek Water Quality Project, a 15-acre constructed wetland adjacent to Carli Creek, a small, 3500-ft tributary of the Clackamas River in Clackamas County, OR. The combined creek and constructed wetland drain an industrialized, 438-acre, impervious catchment. The wetland consists of a linear series of a detention pond and three bioretention treatment cells, contributing a combined 1.8 acres of treatment area (a 1:243 ratio with the catchment) and 3.3 acre-feet of total runoff storage. In this study, raw pollutant concentrations in runoff were evaluated against International Stormwater BMP database benchmarks and Oregon Water Quality Criteria. Concentration and mass-based reductions were calculated for 10 specific pollutants and compared to daily precipitation totals from a nearby precipitation station. Mass-based reductions were generally higher for all pollutants, largely due to runoff volume reduction on the treatment terrace. Concentration-based reductions were highly variable, and suggested export of certain pollutants (e.g., ammonia), even when reporting on a mass-basis. Mass load reductions on the terrace for total dissolved solids, nitrate+nitrite, dissolved lead, and dissolved copper were 43.3 ± 10%, 41.9 ± 10%, 36.6 ± 13%, and 43.2 ± 16%, respectively. E. coli saw log-reductions ranging from -1.3 — 3.0 on the terrace, and -1.0 — 1.8 in the creek. Oregon Water Quality Criteria were consistently met at the two in-stream sites on Carli Creek for E. coli with one exception, and for dissolved cadmium, lead, zinc, and copper (with one exception for copper). However, dissolved total solids at the downstream Carli Creek site was above the Willamette River guidance value 100 mg/L roughly 71% of the time. The precipitation record during the study was useful for explaining certain pollutant reductions, as several mechanisms are driven by physical processes, however it was not definitive. The historic rain/snow/ice event in mid-February 2021 appeared to impact mass-based reductions for all metals. Qualitatively, precipitation seemed to have the largest effect on nutrient dynamics, specifically ammonia-nitrogen. Determining exact mechanisms of pollutant removals was outside the scope of this study. An improved flow record, more targeted storm sampling, or more comprehensive nutrient profiles could aid in answering important questions on dominant mechanisms of this new constructed wetland. This study is useful in establishing a framework and baseline for understanding this one-of-a-kind regional stormwater treatment project and pursuing further questions in the future.
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HALVERSON, NANCY. Review of Constructed Subsurface Flow vs. Surface Flow Wetlands. Office of Scientific and Technical Information (OSTI), septembre 2004. http://dx.doi.org/10.2172/835229.

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Banks, M., A. Schwab et James Alleman. Constructed Wetlands for the Remediation of Blast Furnace Slag Leachates. West Lafayette, IN : Purdue University, 2006. http://dx.doi.org/10.5703/1288284313362.

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Meyer, J. L., et R. A. Jr Burke. Methane emissions from natural wetlands. Office of Scientific and Technical Information (OSTI), septembre 1993. http://dx.doi.org/10.2172/10102626.

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John H. Rodgers Jr, James W. Castle, Chris Arrington : Derek Eggert et Meg Iannacone. Specifically Designed Constructed Wetlands : A Novel Treatment Approach for Scrubber Wastewater. Office of Scientific and Technical Information (OSTI), septembre 2005. http://dx.doi.org/10.2172/877398.

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Peverly, J., W. E. Sanford et T. S. Steenhuis. Constructed wetlands for municipal solid waste landfill leachate treatment. Final report. Office of Scientific and Technical Information (OSTI), novembre 1993. http://dx.doi.org/10.2172/10133187.

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Kim, Byung J., Sherwood C. Reed, Thomas Andrew et Patrick D. Sullivan. Development of Constructed Wetlands for the Reuse of Wastewater in Semi-Arid Regions. Fort Belvoir, VA : Defense Technical Information Center, janvier 1997. http://dx.doi.org/10.21236/ada326726.

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Clayton, Meredith. Koll Center Wetlands Natural Resources Maintenance Management Plan. Portland State University, novembre 2006. http://dx.doi.org/10.15760/mem.34.

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VanZomeren, Christine, et Jacob Berkowitz. Evaluating soil phosphorus storage capacity in constructed wetlands : sampling and analysis protocol for site selection. Engineer Research and Development Center (U.S.), septembre 2020. http://dx.doi.org/10.21079/11681/38224.

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Antworth, Christopher P., David R. Burris, Michelle M. Lorah et Linda J. Dyer. Natural Attenuation of Chlorinated Solvent Ground-Water Plumes Discharging into Wetlands. Fort Belvoir, VA : Defense Technical Information Center, septembre 2002. http://dx.doi.org/10.21236/ada410935.

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