This chapter asks what motivates different methods for measurements and what are the implications of measuring the water flow in universal units of microscopic time. Can absolute and standardized measurements of volumetric flow rates be used as indications of climate change. The flow of water is often measured in time related to volume, speed or a particular practice. The time also depends on several factors, like the soil, slope, and the speed and volume of the water flow in the stream or canal. Sometimes, the engineers with years of experience, just need to take a look at the water flow to know the approximate volume. These are all highly relative measures, as they depend on topography, slope, and speed of water flow, physical strength and personal skills. However, relative and standardized measures of time and water flow do not necessarily exclude each other, and in Colca both measurements are used.