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Title: POLDER SYSTEM IMPACT ON NATURA 2000 TERRITORIES: A CASE STUDY OF VALGUNDE LATVIA
POLDER SYSTEM IMPACT ON NATURA 2000 TERRITORIES: A CASE STUDY OF VALGUNDE LATVIA

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Kristaps Siltumens; Inga Grinfelde; Sindija Liepa; Jovita Pilecka-Ulcugaceva; Anda Bakute
10.5593/sgem2022V/3.2/s12.18
10.5593/sgem2022V/3.2
1314-2704
978-619-7603-54-5
English
22
3.2
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Hydrology and Water Resources
The oversupply of water during the floods and the low soil surface levels determine the difficult ecological, economic, and demographic conditions. It then leads to using agricultural land of different types and intensities and various methods of regulating the water regime: summer polders. Human activity has significantly impacted the ecological processes of the floodplains of the Svete floodplain with extensive amelioration works that have significantly altered the appearance of a natural park. The total area of the natural park Svete floodplain is 931 ha. The Valgunde summer one polder channel is the regulated tributary of the right coast of Lielupe and Mellupite, partly part of the nature park's Svete floodplain nature-barred area. During summer, the polder areas are flooded during high water levels of Lielupe. Still, during the summer, they must adjust the optimum humidity regime and ensure drainage systems, including drainage operation or to regulate the humidity regime in the floodplain, to preserve and restore the habitats of wetlands flood meadows and populations of native wild plants and animal species, also to ensure the use of agricultural land, reconstruction works have been carried out at the same time. The aim of this study is to assess the effects of rebuilding works on the hydrological regime of the Natura2000 site. In August 2021, 12 groundwater level monitoring points were established. At the monitoring point, 2 m deep pipes were installed in a 50 mm diameter, with a perforated lower part. Ejkelkamp Micro-Diver was inserted into the pipes, which records water levels every hour. Oneyear observation data were analyzed using descriptive statistics and Kruskal – Wallis. During the winter period, the polder flooded and drained systems for 65 days in the drained area and 156 days in the Natura2000 area.
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conference
https://doi.org/10.5593/sgem2022V/3.2/s12.18
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 06-08 December, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
157-164
06-08 December, 2022
website
8782
Natuura2000, Polder systems, drainage system, wetland, water balance