The objective of this volume, a part of a series providing guidance on groundwater management and aquifer protection in the Maldives, is to provide guidance on sustainable infiltration techniques of groundwater recharge by illustrating various options that are suitable for groundwater recharge. The complete guide aims to provide specific guidance on improving groundwater based on a number of broad strategies derived from the ‘model’ “Island Climate Resilient Groundwater Management Plan”. This guide can be used by practitioners, engineers, planners and policymakers (e.g. Island Councils) to assist in the process of design, implementation and management of sustainable groundwater recharge and improvement facilities in the Maldives. It can also be used by academics for educational purposes and for capacity building and training on methods of infiltration drainage applicable to low-lying islands of the Maldives, with context-specific application of the science of groundwater. The content of this guidance document is mostly self-standing with the references to existing research, guidance, literature review and international best practices provided. However, this guide should be used together with practical experience of similar projects in the Maldives and other small islands. It is recommended that this document be further supplemented with case studies, design tools etc., for design and implementation of infiltration drainage systems. Even though this guide can be used by the general public for guidance on options available for household level infiltration drainage devices, it does not aim to illustrate or explain the fundamental engineering science of groundwater