Hydrologists often utilize meteorologists and data provided by meteorologists. Fu's research overlaps with that of hydrologists, agriculturists, and ecologists. The geology is of interest to oil prospectors, hydrologists and palaeontologists. Hydrologists make use of this hydrologic budget when they study a watershed. Hydrologists study water and warn of floods. Hydrologists today typically assess water scarcity by looking at the population-water equation. Geomorphologists and hydrologists often view streams as being part of drainage basins. For total alkalinity testing, N/10 HSO is used by hydrologists along with phenolphthalein indicator. Hydrologists use hindcasting for model stream flows.