We believe that knowing how to measure, calculate and express amounts of water is very complex or that it is for those who study at a university. But, you know what? It is not like this. We are in time to responsibly assume the value of the water we use in our socio-cultural-productive development; and not delegate to those who went to a university or are decision makers in this regard. knowing; methods, instruments, tools, materials, procedures and situations for measuring and estimating flows or amounts of water, which is technically known as "water gauging". There are various methods of measuring and estimating amounts of water. However, due to its possibility of application in various circumstances of our daily life, adaptability of tools and easy execution both in rural and urban areas, the volumetric method and the velocity section method using a floating element were selected to be developed in this manual superficial.