11. Eslamian finished his study in Hydrology and Water Resources in 1989. 12. This has substantially altered the hydrology and topography of the watershed. 13. Hydrology has been a subject of investigation and engineering for millennia.14. Each dam on the Columbia River has its own design and hydrology . 15. In some classification systems this can also include hydrology , including oceanography. 16. There were two more surveys of chemical hydrology in 1966 and 1976. 17. Rainfall / runoff relationship are well defined within the field of hydrology . 18. The lower Quinapoxet rates on alert for biology, chemistry and hydrology . 19. Hindcasting is also used in hydrology for model stream flows. 20. Chemistry and the earth sciences intersect in areas like geochemistry and hydrology .