Once, a French scholar said that: "This city turns it back to its river". That is Hanoi, capital of Vietnam, a 4000 year city that is under urbanization process, like other cities in developing countries. Hanoi is a water based metropolis, the Red river (so called: Hồng river) is its natural limit due to the natural intolerance. Through centuries, people tried to build dykes to protect the city from flooding, this area is by no mean inhospitable for the urban- footprint or inhabitation, however, the urban sprawl is inevitable beyond the dyke and it is causing a lot of problems. Therefore, by considering these situations, it is necessary to work on the topic of the river bank to define and solve the existing problems for a sustainable development of the city.