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<br />Example <br /> <br />Advantages <br /> <br />1. Unit Hydrograph <br /> <br />1. Parameters can be <br />transferred to other <br />locations, <br /> <br />2, Parameters can be <br />applied to any storm <br />duration and depth, <br /> <br />pisadvantaqes <br /> <br />1, Assumes rainfall-runoff <br />is a linear process, <br /> <br />2, Parameters do not have <br />direct physical meanings <br /> <br />3. Flow measurements am <br />required to develop reliable <br />unit hydrograph for basin, <br />otherwise, synthetic unit <br />hydrographs must be used, <br /> <br />2, Distributed Parameter Model- This tYPE' of moclel transforms rainfall into runoff at several spatial <br />locations, Distributed models compute flow rates ancl water levels simultaneously, <br /> <br />Example <br /> <br />Aclvant~ <br /> <br />1, Kinematic Wave <br /> <br />1, Theory tlncl parameters <br />are physic,llly based, <br /> <br />2, Gain knowledge of <br />watershed system through <br />model setup, <br /> <br />3, Can quickly moclify baSin <br />features, <br /> <br />Disaclvantaqes <br /> <br />1, Requires detailed spatial <br />precipitation, roughness <br />values, and slope <br />estimates, <br /> <br />2, Require good <br />knowledge of runoff <br />hydraulics, <br /> <br />3, Applies mainly to <br />relatively steep slopes <br />where minimum <br />attenuation occurs, <br /> <br />6,1.3 Regional/Regression Analysis (from Viesll1ann, Knapp, and Lewis), Regional analysis is a <br />method of correlating dependent hydrologic variables with other causative or physically related factors, <br />In such ways, hydrologic characteristics within the region can be summarized and estimates of <br />statistical parameters can be derived from general regional relationships, Typical examples are: 1,) <br />The prediction of peak flood flows the correlation of observed flows on measurable quantities such as <br /> <br />Colorado Flood <br />Hydrology Manual <br /> <br />Ei,a <br /> <br />DRAFT <br />