The river delta of the Dranse is a wildlife reserve located on the shores of Lake Geneva. This protected zone, spreading over 58 hectares only, forms an enclave in an urban area with a commercial mall, industrial sites, and various leisure facilities. I used to live in the neighbouring city, and frequently spent my sunday there. The more often I returned to the delta, the more I felt the presence of the outside world in this supposedly untouched place, even though only fragments of the surroundings were visible. DELTA is a visual and sound installation including photographs, all of them taken inside the reserve, and a quadriphonic soundtrack composed with sounds recorded outside the river delta, in the immediate vicinity of the borders of the reserve.