This book shows you how to use a GPS and Google Earth to create simple and expressive maps to share on the web like the one shown on the cover. With a reading time of a mere 10 hours you will learn to work with a GPS without making mistakes, to use it with Google Earth including in areas without internet access and to quickly create diverse interactive maps that other people can see and modify over the internet without the need for experts or unnecessary complications. Even though it has been written in the context of Relief and Development work, the same process is valid for whatever other application.

This manual aims at walking the reader through the design of a water supply network in a Development context by explaining in a simple manner how to build and analyze a computer model of a water network with Epanet. Epanet is a free and widely used software from the U.S Environmental Protection Agency that models the hydraulic and water quality behavior of water distribution piping systems Arnalich Water and Habitat is an organization that helps improve the impact of humanitarian actors through training and consultancy in the fields of Water Supply and Environmental Engineering.

This collection of exercises has over 320 images designed to walk you step-by-step towards the modeling of water distribution systems which are commonly found in development work. You will learn how to load cartography and background images; to determine water demand and spatial allocation; to simulate the evolution of water quality in networks and to make economic comparisons, while avoiding the most common costly mistakes. This manual will help you make informed decisions for achieving clear and measurable results in development projects interventions. Epanet is a free and widely used software from the U.S Environmental Protection Agency that models the hydraulic and water quality behavior of water distribution piping systems.