Hydrology is the study o the movement, distribution, an quality o watter on Yird an ither planets, includin the hydrologic cycle, watter resoorces an environmental wattershed sustainability. A practitioner o hydrology is a hydrologist, wirkin within the fields o yird or environmental science, pheesical geografie, geology or ceevil an environmental ingineerin.
Hydrology is subdividit intae surface hydrology an marine hydrology. Domains o hydrology include hydrometeorology, surface hydrology, hydrogeology, drainage basin management an watter quality, whaur watter plays the central role. Oceanografie an meteorology are nae includit acause watter is anly ane o mony important aspects within those fields.