| Title |
Hidromechaninio ežerų valymo įtaka metalų ir metaloidų pasiskirstymui dugno nuosėdose / |
| Translation of Title |
Lake restoration, sediment, metals, spatial distribution, kriging. |
| Authors |
Raulinaitis, Mindaugas |
| Full Text |
|
| Pages |
162 |
| Keywords [eng] |
Lake restoration ; sediment ; metals ; spatial distribution ; kriging |
| Abstract [eng] |
Although hydromechanical lake remediation projects have been carried out over several decades, there still is a lack of evidence about the changes in environmental status after such projects, while scientific literature regarding redistribution of metals and metalloids caused by hydromechanical bottom sediment removal is especially scarce both in Lithuania and in other countries. Research of the dissertation consisted not only of extensive geochemical field work and laboratory analysis, but also methods of mathematical statistics and spatial interpolation. Results of the research and their analysis allowed to conclude that hydromechanical lake remediation results in changes of the contents of metals and metalloids of interest and their spatial redistribution in lake bottom sediments, which are specific to each metal and metalloid, thus cumulative indicators should be used to assess overall changes in sediment quality of remediated lakes. Calculation and statistical analysis of on of such indicators - total sediment contamination index (Zd) and surface interpolation of its values allowed to evaluate statistical significance of changes in contamination degree of the newly formed surface sediment layer and to assess cumulative spatial redistribution of metals and metalloids caused by hydromechanical lake remediation. Data provided in the dissertation is especially significant in preparation and design of future sediment removal projects and in determining their feasibility. |
| Type |
Doctoral thesis |
| Language |
Lithuanian |
| Publication date |
2012 |
