Pallikaranai Marsh is an important part of the Chennai water system composition and ecological diversity, but it is rapidly shrinking due to urban development. The rapid increase of the population in Chennai cause the urban expansion and lead to the texture of the past water system has gradually disappeared ,the production of a large amount of solid waste, the
difference in economic status has led to different opportunities for obtaining water, and the urban construction cannot handle the corresponding amount of sewage treatment. The problem affects the intimacy and dependence of people and water.
The dependence of tanks and clean water brings opportunities for commerce and people to gather together, and brings the vitality of the city, and also creates more social relationships between people. Now it is alienated from the crowd due to the deterioration of tank water. Therefore, we put in new production functions and social activities, raise the awareness of the Chennai people on the water, re-chain the intimate relationship between people and water, and reverse the water bodies that are gradually disappearing. The swamp is no longer a forgotten space. By improving the original solid waste and sewage treatment system, moreover, establish a circulatory system that can self-purify and give back to the community.

Responses to the general idea, the design strategy is to intervene the lighter natural purification and waste recycling to create more residents’ daily lives of the upstream. To the downstream, the production, transaction, groups with different economic incomes and social activities connect the
circular relationship of resident and water. Through the circulation of up and downstream, we establish prototype around the marsh from the inventory
of water bodies, the links between current and past channels, the placement of green belts to the generation of social activities. The prototype will be adjusted by the difference of development density and texture of the upstream and downstream from the marsh.