Black Water Grey SettlementsDomestic Wastewater Management and the Socio-ecological Dynamics of Jakartas KampungsThis PhD research addresses the problems of wastewater management in relation to the fragmented spatial development practices within the informal cities of the Global South. Four theoretical bodies Urban Political Ecology, Institutionalism, literature on Informality, and Social Innovation have been put into dialogue with each other in order to develop a comprehensive analytical framework. Such framework is capable of examining the discrepancy in access to water and wastewater infrastructure by different neighbourhoods and communities, the reproduction of socio-spatial inequalities in Jakarta, as well as failing governance in urban communities. Besides providing a framework for a critical understanding of the contemporary environmental sanitation infrastructure development processes in relation to uneven economic development, the analytical tool also helps to develop an approach for analysing future development strategies.In addition to its theoretical-methodological reflections, the research also contributes to the empirical understanding of Jakarta and its neighbourhoods: how the sanitation and water sector in general, and wastewater management in particular functions. Due to spatial fragmentation within the built environment, diverse socio-economic and fragile geo-ecological conditions in different settlements and the city as a whole, it is argued that Jakarta should adopt a decentralized approach to wastewater management. The research addresses the notion of decentralized wastewater management in a manner of searching multi-scalar development approaches to the interconnected household and city-wide sanitation problems, as well as of finding possible governance platforms for water and sanitation service co-provision that allows for an active role of communities in development. It gives a particular attention to informality in water and sanitation service provision and how it interacts with regular state and market initiatives. The study finds that informality, with varying forms of reciprocal dynamics as its foundation, is not only a survival strategy but also a source of creativity in connecting ecological opportunities, technologies both traditional and contemporary and modes of self-regulation to each other.This PhD research seeks to improve current understanding of the socio-ecological dynamics of Jakartas urban kampungs, in which disparities in basic sanitation infrastructure services persist. It highlights some of the key spatial development issues that must be addressed in order to formulate an appropriate response to the heterogeneous socio-ecological problems in Jakarta, especially in the kampungs. The thesis is built on a premise that spatial qualities in urban kampungs can be improved through an integrated water management approach combining fields and scales of intervention as well as dimensions of development. In favour of integrating water management and spatial planning, and within the framework of strategic planning, the PhD thesis argues for the importance of socially innovative co-production that incorporates interactive urban design projects for successful local development initiatives.