1) filter out the contaminated river
2) to slow down the velocity of river by increasing the volume of the channel
3) allow the water to be usable for irrigation and hydro thermal cooling for the urban market.

In response to the city's various grid structures, building blocks and neighboring streets are then assimilated to form the organization of our site, with an attempt to stitch the different retail areas into one multi-functional and universal urban market Instead of adding more building structures to the already over-crowded city of Sao Paulo, large scale urban farmlands, water pools, and recreation areas are proposed on the project’s site to offer both aesthetic and spatial relief for the area. some water pools and recreation areas are placed into sunken courtyards to develop the sectional richness of the project, and to provide more intimate public spaces in this congested urban fabric as well. This urban farmland plaza is designed as a floating roof structure hovering over the market down below. The food market is then set up as a food stadium in the geometry of a food bowl below ground, housing vendors such as artist showrooms, food production-consumption, clothing and misc. goods. Starting with production vendors up above, the market steps down with consumption type vendors at the center of bowl, to architecturally illustrate the state of food processing. Not only the scale of food begins to break down as the goods get processed in section, but the spaces also change accordingly for this purpose. In addition, large scale light cores from the openings of the roof also enable courtyards, landscape and water to be brought down to the market level, to further enrich the connection between the two planes. This system also welcomes future expansion to its program - an amphitheater, performance areas, cultural events, can all take place in this urban stadium.