D.Lauva1*, I.Grīnfelde1, 2, A.Veinbergs1 1 Department of Environmental Protection and Water management, Faculty of Rural engineering, Latvia University of Agriculture, Latvia 2 Scientific Laboratory of Forest and Water Recourses, Latvia University of Agriculture, Latvia didzis@lauvadidzis.com   Abstract The annual regime of shallow groundwater levels significantly impacts agricultural and forestry production. To adapt to climate changes […]

A. Poppels Riga National ZOO.Meza prospekts 1, LV-1014 Riga, Latvia apoppels@hotmail.com   Abstract Due to climate changes in last decades some Ephemeroptera species characteristic for Central part of Europe now are common in Latvia but some species disappeared. For example, in 2005 Arthroplea congener is stated as a new species for the fauna of Latvia […]

E. Govsha, B. Gjunsburgs Water Engineering and Technology Department, Riga Technical University, Azenes str. 16/20, Riga, LV-1048, govsa@rtu.lv   Abstract The damage of engineering structures in rivers, because of scour (near intakes, pumping stations, bridge structures – abutments, guide banks, dams, etc.) leads to considerable environmental and economical losses. During multiple floods the scour hole […]

I. Kokorite*, M. Jankevica, M. Klavins Faculty of Geography and Earth Sciences, University of Latvia, Riga, Latvia ilga.kokorite@lu.lv   Abstract Studies on lake sediment composition of can provide valuable information about character of lake development and thus can be used to study long-term natural and anthropogenic impacts on lakes and their catchment. The aim of […]

I. Druvietis Faculty of Biology, University of Latvia, Riga, Latvia ivarsdru@latnet.lv   Abstract Planktonic communities were investigated in morphometrically eutrophic – shallow clear water and brown water lakes. Some of them are lagoon type lakes (3 lakes) submitted to winds facilitating a complete mixture of water layers, some of them are situated in floodplains (4 […]

B.Gjunsburgs & E.Govsha Departmentof Water Engineering and Technology, Riga Technical University, Latvia, Riga, Azenes16/20 gjunsburgs@bf.rtu.lv; jelena.govsa@rtu.lv   Abstract River flow contraction by engineering structures (intakes, embankment, abutments, spurs, guide banks) to flow leads to flow pattern modification, concentration of streamliners, sharp drop in water level, local increase in velocity, and development of scour hole. Damages […]

2010-473 GENETIC VARIATION IN POPULATIONS OF BOSMINA CRASSICORNIS OF SOME LAKES IN LATVIANatalja Skute 1, Aija Brakovska 11 Institute of Ecology of Daugavpils University, Latvia Abstract:Cladocera is of great importance in aquatic food chains. Several aspects of their biology, population genetic have been studied. During the analysis of samples from investigated lakes in Latvia, which […]

2010-507 MODELING OF CONTAMINATED GROUNDWATER FLOWS BY EHDA: A CASE STUDY OF LATVIAJanis Valters 1, Hileilis Segals 1, Inga Grinfelde 1, Einars Pundurs 11 Agency of Latvia University of Agriculture “Research Institute of Water and Land Management”, Latvia Abstract:In Latvia as a heritage from previous regime are many as source of contamination of ground waters. […]

2010-262 RESEARCH OF CHANGES OF IONIZATION AND METEOROLOGIC FACTORS OF ATMOSPHERIC AIR IN REZEKNE CITY, LATVIAAndris SkromulisRezekne Higher Education Institution, Rezekne, Latvia Abstract:The analyze of many scientific literature sources shows the important role of air ions on living nature, especially pointing out the well-mined impact of light negative air ions on human organism. The level […]

2010-314 WINTER FLOOD IN THE DAUGAVA RIVER AND ITS FLOODPLAIN LAKES (LATVIA) – A POSSIBLE SCENARIO IN CLIMATE CHANGE CONTEXTJana Paidere 1, Davis Gruberts 1, Arturs Skute 1, Ivars Druvietis 2, Renate Skute 11 Daugavpils University, Latvia,2  University of Latvia, Latvia Abstract:In 2007 January, in the Daugava River (Latvia) and its floodplain lakes uncharacteristic high […]