Harku järve tervendamismeetodid
Laen...
Kuupäev
2025
Kättesaadav alates
05.09.2025
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Tallinna läänepiiril asuva madalaveelise Harku järve seisund on alates 1970. aastatest olnud kehv. Tugeva inimmõju all kannatava Harku järve puhul on tegu hüpertroofse veekoguga, mille keemilise ja ökoloogilise seisundi klass on tänapäeval väga halb. Töö eesmärgiks oli uurida, millised järve tervendusmeetodid sobiksid Harku järve ökoloogilise seisundi parandamiseks. Töö kirjutamiseks on kasutatud erinevaid teadusartikleid ja erialast kirjandust. Tulemuste osas olid peamisteks allikateks Harku järves läbiviidud seired. Töö käigus selgus, et Harku järve mõjutavad nii suur välis- kui ka sisekoormus, mistõttu on järve seisundi parandamiseks vaja rakendada mitmeid erinevaid tervendusmeetodeid. Esimese sammuna tuleks vähendada valgalalt järve voolavat reostust, seejärel vähendada järve sisekoormust ja viimase meetmena tuleks taastada ökosüsteemi tasakaal läbi biomanipulatsiooni. Harku järve tervendamiskavasid on tehtud ka varem, kõige hiljutisem neist Harku järve meetmekava. Ka seal on väljatoodud nii välis- kui ka sisekoormuse vähendamise vajalikkus. Enne Harku järvel tervendusmeetodite rakendamist tuleks läbi viia täiendavad uuringud.
The condition of the shallow Lake Harku, located on the western border of Tallinn, has been poor since the 1970s. Lake Harku, which suffers from significant human impact, is a hypertrophic lake whose chemical and ecological status is currently classified as very poor. The aim of this study was to investigate which restoration methods would be suitable for improving the ecological status of Lake Harku. Various scientific articles and professional literature were used in writing this paper. The main sources for the results section were monitoring studies conducted in Lake Harku. The study revealed that Lake Harku is affected by both high external and internal nutrient loading. Therefore, improving the lake’s condition requires the implementation of multiple restoration methods. As a first step, pollution from the catchment area should be reduced. This should be followed by measures to reduce internal loading, and finally, the ecological balance of the ecosystem should be restored through biomanipulation. Restoration plans for Lake Harku have been developed in the past, the most recent of which is the Lake Harku action plan. This plan also highlights the need to reduce both external and internal loading. Before implementing any restoration methods in Lake Harku, further studies should be conducted.
The condition of the shallow Lake Harku, located on the western border of Tallinn, has been poor since the 1970s. Lake Harku, which suffers from significant human impact, is a hypertrophic lake whose chemical and ecological status is currently classified as very poor. The aim of this study was to investigate which restoration methods would be suitable for improving the ecological status of Lake Harku. Various scientific articles and professional literature were used in writing this paper. The main sources for the results section were monitoring studies conducted in Lake Harku. The study revealed that Lake Harku is affected by both high external and internal nutrient loading. Therefore, improving the lake’s condition requires the implementation of multiple restoration methods. As a first step, pollution from the catchment area should be reduced. This should be followed by measures to reduce internal loading, and finally, the ecological balance of the ecosystem should be restored through biomanipulation. Restoration plans for Lake Harku have been developed in the past, the most recent of which is the Lake Harku action plan. This plan also highlights the need to reduce both external and internal loading. Before implementing any restoration methods in Lake Harku, further studies should be conducted.
Kirjeldus
Bakalaureusetöö
Kalanduse ja rakendusökoloogia õppekaval
Märksõnad
bakalaureusetööd, Harku järv, ökoloogiline seisund, tervendusmeetodid