In a situation where river basin development endeavors are undertaken in a complex socio-economic and biophysical settings and with different even conflicting interests, establishing and facilitating effective communication and knowledge sharing among different stakeholders is not only essential but has become a must. Communication and knowledge sharing among stakeholders working in rainwater management has a paramount importance for shared understanding. Although various rainwater management initiatives have been undertaken in Ethiopia in the last thirty years, there has been limited opportunity to share experience, to take valuable lessons and avoid duplication of efforts. This book is expected to give important highlights on the different challenges that stakeholders face to create a platform for shared understanding on basic concepts and practices of RWM. It also suggests different communication and knowledge sharing tools and approach to materialize effective knowledge sharing and joint learning. This book would specifically be useful to professionals that are working in the area of water management, innovation platforms, agricultural communication and knowledge management.