16/11/2017 3:41:00 16/11/2017 3:41:00 Whatispedia 16/11/2017 3:41:00 Isohyetal line Isohyetal line Isohyetal line Share on What is Isohyetal line?Isohyetal line meaning Variously defined as time from beginning (or center of mass) of rainfall to peak (or center of mass) of runoff. (After Am. Soc. Civil Engineers, 1949, p. 106.) reference: USGS – Water Basics Glossary Tags: Hydrology, Science Categorised in: What isComments are closed here.