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Your search keyword '"Grinberga, Linda"' showing total 5 results
Start Over Author "Grinberga, Linda" Topic constructed wetlands Publication Year Range Last 10 years
5 results on '"Grinberga, Linda"'

1. ANALYSIS OF THE REMOVAL OF BOD5, COD AND SUSPEND ED SOLIDS IN SUBSURFACE FLOW CONSTRUCTED WETLAND IN LATVIA.

Author

Grinberga, Linda, Grabuža, Dagnija, Grīnfelde, Inga, Lauva, Didzis, Celms, Armands, Sas, Wojciech, Głuchowski, Andrzej, and Dzięcioł, Justyna

Subjects
SUSPENDED solids, WETLANDS, FARMS, BIOCHEMICAL oxygen demand, CHEMICAL oxygen demand
Abstract

Copyright of Acta Scientiarum Polonorum: Architectura is the property of Wydawnictwo SGGW and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2021
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2. CONSTRUCTED WETLANDS AS ENVIRONMENTALLY FRIENDLY DRAINAGE SYSTEM ELEMENT.

Author

Strupa, Laura and Grinberga, Linda

Subjects
*WETLANDS, *AQUATIC resources, *EUTROPHICATION, *ALGAL blooms, *MARINE ecology
Abstract

Eutrophication is the state with high nutrient concentration, which can cause plant growth including algae blooms. Nutrients drain into the Baltic Sea from agricultural lands and drainage systems, from weak or insufficient wastewater treatment, from contaminated industrial waste water, and even from the rain water, if it contains dust, unburnt oil from the roads and parking areas or other pollutants washed from hard coverings or accumulated in the air. High nutrient level into the natural waters affects the human economic activity. An inexpensive way to reduce nutrient load to water objects from agricultural lands is formation of constructed wetlands or restoration of natural wetlands. The main tasks of this study were to describe the processes in constructed wetlands, the conditions of construction and to analyze the capacity of constructed wetlands to reduce nutrients and suspended particles inflow to open waters. Another task was to determine nutrient retention efficiency in the Mežacīruļi constructed wetland in Latvia by the descriptive methods of mathematical statistics and Wilcoxon T test method and to compare the obtained results with ones from Bergaholm constructed wetland in Sweden. In the end of this article, the evaluation of efficient theoretical design parameters for constructed wetlands in Latvia is made. The research results indicate that the Mežacīruļi constructed wetland does not provide the sufficient nutrient retention. To improve the nutrient retention efficiency, it would be necessary to develop it, e.g., to increase the amount of vegetation, such as planting Typha spp. or to make a small constructed wetland extension to a depth of 0.3 m for Carex spp. to stabilize the sediments. [ABSTRACT FROM AUTHOR]

Published
2017

3. Phosphorus removal efficiency by in-stream constructed wetlands treating agricultural runoff: Influence of vegetation and design.

Author

Kill, Keit, Grinberga, Linda, Koskiaho, Jari, Mander, Ülo, Wahlroos, Outi, Lauva, Didzis, Pärn, Jaan, and Kasak, Kuno

Subjects
*CONSTRUCTED wetlands, *WETLANDS, *AGRICULTURAL pollution, *PHOSPHORUS, *LAND management, *WATERSHEDS
Abstract

With population growth, demand for agricultural products has increased, which affects agriculture, fertiliser use and land management. Due to nutrient inputs from arable areas, the water quality of rivers and lakes near agricultural lands has deteriorated. Constructed wetlands (CWs) are one of the measures used to improve water quality through natural water treatment processes. We studied phosphorus removal in relation to environmental characteristics in five in-stream free surface flow CWs in Finland, Estonia and Latvia. Wetland/catchment area ratios varied from 0.1% to 5%. Three CWs were covered in dense vegetation. On average, the Vända CW and Hovi CW TP removal efficiency throughout the study period were highest (32.1 ± 3.6% and 34.9 ± 4.4%, respectively) among all studied CWs. Nummela Gateway CW, Rantamo-Seitteli CW and Mezaciruli CW showed lower TP removal efficiency and on many occasions the outflow concentration exceeded the inflow concentration in Rantamo-Seitteli and Mezaciruli CW. Vegetation cover emerged as the most important factor in the treatment efficiency of in-stream CWs, reducing flow rate, increasing water retention time and decreasing probability of the CW becoming a source of phosphorus during flood events. • Flow rate controls phosphorus removal efficiency in in-stream constructed wetlands. • High flow values often resulted in significant reduction in phosphorus removal. • Wetlands with dense vegetation cover had higher and more stable phosphorus removal efficiency. • Shallow meandering wetlands benefit vegetation spread, water retention time, and phosphorus removal. [ABSTRACT FROM AUTHOR]

Published
2022
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