This course covers several topics related to and useful for stream hydrology calculations, including: overview of design discharge, probability, gage analysis for flow frequency, regional analysis, flow duration, hydrological models, channel-forming discharges, and other sources of design flows. At the conclusion of this course, the student will: Be familiar with low flows, channel-forming discharge and high discharge for use as design discharge for streams Be familiar with the use of flow duration in design discharge calculations Be familiar with the use of seasonal flows in design discharge calculations Be familiar with the use of estimates of future flows in design discharge calculations Be able to calculate the annual probability of occurrence (P) of an event of known return period (Rp) Be able to calculate the risk (probability of exceedance of an event of annual probability, P, over a period of n years) Be familiar with the statistical parameters, mean, standard deviation, and skew coefficient Be familiar with the normal distribution, log-normal distribution, Gumbel extreme value distribution, and log-Pearson type II distribution for use in discharge-frequency analyses Be able to determine the K-value for the Gumbel extreme value distribution for known return period and sample size Be able to determine the K-value for the log-Pearson type III distribution for known recurrence interval and skew coefficient Be familiar with cautions and limitations in connection with channel-forming discharge analyses