Design Guidelines for Upgrading Living Conditions in Wetslums

Koen Olthuis

Waterstudio.NL

Abstract – The megalopolis of Dhaka, Bangladesh faces, in a larger scale, common issues with the rest of Asian ones and more particularly South Asian ones: a massive population growth leading to urban sprawl on flood-prone areas, mainly in form of slums; named wetslum in this article. However, even if this condition is expected to increase in the next decades, these wetslums have poor living conditions and lack access to basic services. Thus, the purpose of this paper is to propose an approach and guidelines to favor small scale project able to improve wetslum dwellers’ living conditions. To do so, the specific issues of these areas which are a shortage of available space, a lack of services due to investment risks and the insecurity of land tenure, are identified along with the position of the different stakeholders involved in these areas. Then, guidelines are set up to bypass these difficulties. Consequently, the findings are used to establish eight constraint requirements that have to be addressed by a wetslum upgrading project proposition: geographic location in wetslum, flood proof ability, flexibility, transportability, standardization, affordability, safety and legality. These guidelines will then be used in a near future to develop a small scale proposition named City App.

Keywords – Wetslum, Dhaka, services provision, improving living conditions, flooding.

Koen Olthuis (born 1971) is a Dutch architect. He studied architecture and industrial design at Delft University of Technology. Olthuis is founder of the Dutch architectural firm, Waterstudio.NL, which specializes in floating structures to counter concerns of floods and rising sea levels. The firm is currently based in Rijswijk, The Netherlands. In 2005, together with Paul Van de Camp, Olthuis co-founded a company that specializes in developing floating structures. In 2007, Olthuis was ranked #122 in TIME Magazine’s readers’ poll of “the most influential people of the year”, with a rating of 45 out of 100 possible points. In 2010, together with David Keuning, Olthuis authored a book called Float, which discusses construction on water. Olthuis is currently a member of the Flood Resilience Group UNESCO-IHE. The Flood Resilience Group (UNESCO-IHE / TU Delft) focuses on establishing resilient urban water management. Often partnering with both private and public organisations, the Flood Resilience Group takes a trans-disciplinary approach to enhance resilience of cities to extreme weather events by incorporating urban water system planning, design, and governance. Koen Olthuis owns patent rights on the method for producing a floating base.