This document discusses the interaction between spatial planning and river basin management in Ireland. It outlines the functions of planning authorities, including developing county development plans and managing development applications. It emphasizes that planning must ensure compatibility with River Basin Management Plans to promote sustainable development. Key policies like Strategic Environmental Assessment and Appropriate Assessment are used to align plans, policies and projects. The document also discusses stakeholders in the planning process, and how river basin management influences planning policy, guidelines, and development decisions to protect water quality.