As a warning for the unexpected accident during the constructions, the HQ installs 'Integrated Water Pollution Prevention Center' to respond actively to them. About the muddy water problem which would be caused by a series of the construction process, we have already the countermeasures as follows: double anti-muddy water filters, keeping distances between dredgers at least 2 km, inhalation-type dredge and so forth. During the examination complied with the regulation about ground pollution processing test, the sediments from dredging works will be treated after purification process under scrutiny in case of contaminated soil to be found.
As mentioned above, the Four Major Rivers Restoration Project put the ecological consideration above all. The rivers as revitalized natural environment promising that human and nature altogether to exist in harmony must be what you can expect for after successful end of this project. Apart from the experts citations that self-recovering speed of riparian ecosystem is much far faster than terrestrial one, as like the past successful examples that the ecosystem became healthier after the development projects on the Han River and Taehwa River, the ecological and environmental circumstances around the four rivers would be richer and divers in the long-term view thanks to the project.