This thesis aims to develop an ecosystem services approach to land-use planning through integration of ecosystem accounting and spatial modelling, with a specific case study on deforestation and oil palm expansion in Central Kalimantan Indonesia. This thesis applies three mapping techniques to map key ecosystem services in Central Kalimantan and demonstrates how to incorporate ecosystem services maps in a provincial land-use planning. This thesis also assesses monetary values of the key ecosystem services in a way that is consistent with the principles of national accounts. Based on the spatial information of ecosystem service values, this thesis then analyzes the environmental and economic impacts of land-use change, with a specific example on oil palm expansion. Finally, this thesis applies a flood risk modelling to identify the long term hydrological impacts of oil palm cultivation on peat, and analyzes the economic impacts of flooding on oil palm production and other ecosystem services.