The organisation of the block is characterized through an orthogonal grid based on the messurements of the unit. The grid is 2.7m in square with small internal streets of 1.35m width. An important aspect was to preserve the feeling and atmosphere of the original block system by evolving its organisational structure. An important inspiration was the competition entry for a housing estate in Previ, Lima by Atelier 5 as well as the Siedlung Halen near Bern. Both projects operate on small scale level creating high densities and a variety of high quality outdoor spaces. In both projects the preservation of a human scale in architecture was essential. Even when the unit operates autonomous in term of water supply and grey water treatment, on block level we did organise communal water ponds for rain water collection. Through a drainage system these ponds further water the gardens. The composting toilets serve as sanitary installations for the bigger block.
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The two blocks, one north of the Ciliwung River the other one on the south side, are differently affected by the river. The northern block touches the water on relatively short stretch where as the southern part has a large part of its boundary along the river edge. Both are in part flooded during the wet season, yet both of them have some areas which are high enough for keeping the water out and reducing flood damages to a minimum. First and foremost it is necessary to allow the river to expand and to provide it with a predictable area to flood during wet season. For this purpose the most exposed houses along the river bank are being removed in order to gradually terrace the terrain. In order to master this drastic situation a garbage collection depot is to be implemented into each block, preferably at its highest elevation to keep it from getting damaged by the yearly flooding.
With our roof path we make sure that the inhabitants have a safe and dry way system trough the time of flooding. The walkable roof landscape is always next to the existing main roads of the block. Down to the river these new streets end up in the public belt. Here are all the public institutions like the school and shops. The river gets more space with the new park. So the flood should never reach again the level of 2007.The new riverfront is more alive with the footpath and there are places for relaxing and for fishing etc.
The design intention is to create a public space that changes its place with the different water levels. A concrete grid structure, which reaches the high flood level, is the base of the units. In dry season, public life takes place in the streets on the ground and between the concrete structure. During rain season, when the lower space is flooded, the grid structure is used to set up temporary streets and connections between the buildings. New pedestrian connections (bridges) between the two blocks improve the accessibility of the lower block to schools and other public services.The river edge is broadened as natural habitat. With pekarangans, the green river edge finds its way into the block. Through slight changes of topography the inner block is protected from flooding.
Our main concept for the block was to use the supporting walls of the existing structures as ‘roots’ for our flexible, wooden light-frame construction that would span over them and provide our housing-units. We create an expanded second floor that connects the units and therefore provides public and circulation space as well as the opportunity for rooftop gardening. This new housing-level would not be affected by seasonal flooding. Each block we equip with at least one of our new buildings that improve the situation and organisation of the existing block by providing a water tank that secures the water supply of the other units, a filtration system for sewage water and a waste-collection spot. The water tank is fed by rainwater collected by our water channelling system that is composed of the housing units’ roofs.
Situation: The two blocks are very different – one is defined by the old railway depot and the bridge becoming an important traffic axe affecting the whole block. The second block has a very common structure with a high density of housing and is bordered by the old railway depot, the Ciliwung River and a main street. Organisation strategy: In the common block we found a stripe structure defined by streets. We used these streets to incorporate a canal system flushing the sewage water of the houses into a buffering zone along the river. Further the stripes were divided in several sections having a water tank in each one collecting the rainwater from the roofs. The garbage collection should also be organised along the streets.
Central-Park _Through a shortcut in the course of the Ciliwung River, the yearly flooded area in the middle of the Kampung becomes a detention basin. The former inha- bitants of the generated island find a new home on the other side of the river. A gradual process of recultivation on the island can take place. A network of paths makes sure that the area can be used as a recreation zone – already at an early stage. After the restoration of the ground, the area serves for agricultural purposes and offers opportunities for fishing and recreation. The buildings form a clear facade to the park island. Through the decline of the building height and a network of overlapping roofs the rain water can be collected and will be stored on the highest point of the terrain.
The riverbed is meant to be enlarged. The topography at the river edge will be lowered and a riverside park will be developed. In case of flooding, the riverside park can swallow a water rise of up to two meters. The street network in the northern block will be extended and connected to the neighboring blocks. The density in the lower block shall be reduced at the cost of enhancing the density in the southern block. The two blocks will be connected by pedestrian bridges which in case of flooding serve as means of escape from the incoming waters. Along the ridge of the southern block another linear park will be created. In each of the blocks, a new public square will be implemented serving as a community center and as a strategic hub in case of flooding.
Facing The Block We propose a terraced block structure, elevating to the center of the block, the mosque and the great market. Different steps in the topography define different floodlevel, organize the block, allow the sewage system to work just with gravity, make it easier to plan and structure evacuation. The Peninsula, that is hardly disconnected from the accomodation on the opposite riverbank with schools, administrative buildings and proper infrastructure becomes connected to the other side with two new bridges. The sub-blocks for the new modular building structures are defined by the terrace steps an the streets. Starting with a low density the clusters become more dense as safer the area gets from flooding. The new units can be easily integrated to the existing building structure due to their flexibility and their possibilty to be separated into small and autonomous pieces.