Assessment of regulating ecosystem services in Surabaya City

Abstract Ecosystem services have been extensively studied in recent years. As a component of ecosystem services, regulating ecosystem services play an important role in promoting and maintaining liveable and resilient cities. There is a strong relationship between formulation of urban planning and regulating ecosystem services. A clear understanding is required to identify the indicators of regulating ecosystem services to be considered in spatial and development planning documents. Surabaya as the second largest city in Indonesia has very high dynamics of land use and environmental changes due to its rapid development. This aim of this study is to assess the regulating ecosystem services in Surabaya City. The specific objectives are to identify the indicators of regulating ecosystem services, to assess the regulating ecosystem services and to provide maps of the spatial distribution, and to calculate the composite index of regulating ecosystem services. Eight indicators of regulating ecosystem services were used in this study, namely climate regulation, water regulation, drought prevention and flood control (R2), prevention and protection from natural disasters, water purification, waste management and decomposition, air quality, natural pollination, and pest and disease control. The results show that the ecosystem service index in Surabaya City has medium score.