Development culture, based on the dominance of man over nature and the built over the natural, continues to predominate. To take one example, the demands of an ever-increasing number of amateur fishermen are satisfied by financing the continuous re-stocking of rivers with juvenile or small-size fish while ignoring the extinction of native species, and the damage caused by the introduction of non-native species. This method of management, and the slow acceptance of the concept of environmentally sustainable planning, is partly due to the slow translation of the results of biological and ecological research into the standardised and integrated parameters of environmental analysis necessary for planning. The new Indices for assessing river-bank quality (developed for the River Adige but tested on ther rivers) may well provide a useful step forward. These Indices, combined with others already in use or under development, may help to define a system of areas of differential tutelage along the course of a river and in the surrounding territory in which human activities and development will be compatible with conservation and rehabilitation of the river's self-purifying capacity, while at the same time allowing for effective flood defence and the reproduction of native fish species.
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