1.2.2 Comparative evaluation of the potential choices and argumentation with respect to the selection of the examined choices related to the construction of a deep water navigable canal
The comparative evaluation of the potential choices of construction of a deep water navigable canal in the Ukrainian Delta of the Danube is presented in chapter 1. All the projects are ranked out in two categories:
A - the construction of the deep water navigable canal on the existing channels within the active delta, through the sand banks at their mouths;
B - the construction of the deep water navigable canal beyond the active delta, by building up a locks canal.
The choices considered to be the most advantageous from a technical and economic point of view are being analyzed further on - one choice for each category. Both envisaged waterways follow the Danube line from Reni to Vilkovo (on the Chilia arm).
The already existing canal, Renl - Izmall - Klslltkll Island, has a natural depth which is
acceptable for the construction of the canal (the depth designed by the project should be 8.1 m); further on to Vilkovo, there are a few sand banks, with a 5 to 6 m average depth, that need to be dredged, in order for them to reach the depth provided by the project. The temporary depositing of the excavated soil (up to 90%) shall be done in places that have been previously and particularly designed for this purpose, on the banks of the canal where dykes needing reconditioning are situated. The dykes exploitation office is required to advise with respect to the selection of alternative lands to deposit the extracted soil. The total area necessary to deposit soil is 96 hectares.
According to Choice 1, the tract of the deep water navigable canal passes from Vilkovo on the Solomonov channel, on the Bazarciuk gulf, on the Jebriansk channel and the Jebriansk pools, to the Jebriansk gulf, in the Jebriansk land split and the Morskol Kut area. A lock is to be constructed at the entrance in the canal, in the Bazarciuk pools area.
According to Choice 2, the tract of the canal passes from Vilkovo, on the Starostambulsk channel and on the Bystroe channel, reaching the sea shore.
Both choices envisage for the tract of the canal to pass on the territory of the Danube Natural Reserve. Both canals would pass along the Ermakov island, belonging to the buffer zone of the Danube Natural Reserve, further on, according to choice 1 , the tract would cross the geographical anthropogenic configurations and the buffer zone of the Danube Natural Reserve while, according to choice 2, it would cross the geographical anthropogenic configurations, the buffer zone and the reserve strict regime area.