The Global Earth Observation System of Systems Asian Water Cycle Initiative Observation Convergence and Data Integration (GEOSS/AWCI/OCDI) project was initiated under the framework of GEOSS/AWCI to develop an information system for promoting the implementation of integrated water resources management (IWRM). The project follows up the data focus of the IIWaDATA project (ARCP2007-02CMY) and focuses on water cycle data collection, sharing, exchanging, and management at the regional level in Asia in cooperation with national governments, institutes and research communities, and also international organizations. The GEOSS/AWCI/OCDI project involves 20 participating countries and 18 river basins in the Asia-Pacific region, and has an International Coordination Group (ICG) which consists of national representatives of participating countries, experts from research institutes, universities, and a space agency for planning and coordinating the GEOSS/AWCI/OCDI activities. It has four working groups (flood and landslides, drought and water scarcity, water quality, and climate change) to study common requirements and solutions of local issues. Demonstration projects in the mentioned basins are being implemented with support of various funding sources. A strong capacity building program has been developed and implemented to support the demonstration projects.