hydrograph
graph showing the rate of flow (discharge) versus time past a specific point in a river, channel, or conduit carrying flow
en-US/ˈhaɪdɹəˌɡɹæf/
en-GB/haɪdɹəʊɡɹɑːf/
graph showing the rate of flow (discharge) versus time past a specific point in a river, channel, or conduit carrying flow