Nadjet AROUA and Ewa BEREZOWSKA-AZZAG Polytechnic School of Architecture and Urbanism – Algiers, ALGERIA. arouanajet@yahoo.fr   Abstract Rainfall is necessary to global water cycle perenniality and hydrodynamic balance of rivers whose defines the mobility in space and time. At the flood plain, the riparian zone interferes whith human settlements. Right then, the initial external natural […]