ABSTRACT
Isochrone curves are lines connecting the points in a watershed that have equal times of concentration. The isochrone farthest from the outlet represents the time required for the water from a uniform rainfall to reach the outlet from the entire watershed surface. The design of the isochrone pattern makes it possible to visualize the entire hydrological behavior of a watershed and the relative importance of each of the surfaces contained between two isochrone curves (Figure 3.7). As we will see, these isochrones curves make it possible, by making certain assumptions, to create a flood hydrograph of a rainfall event over the watershed.
