Dr. Brendan O'Connor:

The Deputy mentioned diverting streams. That is quite a complicated thing to do because it really could affect the ecology of the lake. It would require a Natura impact statement. Any action like that would be very difficult to get through. Some people have mentioned the idea of digging out the sediments to take the phosphorous and nitrogen out directly. There would be issues for the National Parks and Wildlife Service with regard to how that would affect the existing ecology of the lake, even though that ecology is poor. Whatever method is used, it has to be assessed. We have to look at the potential impact of those actions on the ecology of the lake.