By Baxter E. Vieux
1. five REFERENCES 127 7 electronic TERRAIN 129 1. 1 advent 129 1. 2 DRAINAGE community a hundred thirty 1. three DEFINITION OF CHANNEL NETWORKS a hundred thirty five 1. four solution based results 138 1. five CONSTRAINING DRAINAGE path 141 1. 6 precis a hundred forty five 1. 7 REFERENCES 146 eight PRECIPITATION dimension 149 1. 1 advent 149 1. 2 RAIN GAUGE ESTIMATION OF RAINFALL 151 ADAR STIMATION OF RECIPITATION 1. three R E P one hundred fifty five 1. four WSR-88D RADAR features 167 1. five enter FOR HYDROLOGIC MODELING 172 1. 6 precis 174 1. 7 REFERENCES one hundred seventy five nine FINITE point MODELING 177 1. 1 advent 177 1. 2 MATHEMATICAL formula 182 1. three precis 194 1. four REFERENCES 195 10 allotted version CALIBRATION 197 1. 1 creation 197 1. 2 CALIBRATION method 199 1. three disbursed version CALIBRATION 201 1. four automated CALIBRATION 208 1. five precis 214 1. 6 REFERENCES 214 eleven dispensed HYDROLOGIC MODELING 217 1. 1 creation 218 1. 2 CASE experiences 218 1. three precis 236 1. four REFERENCES 237 12 HYDROLOGIC research AND PREDICTION 239 1. 1 advent 239 x disbursed Hydrologic Modeling utilizing GIS 1. 2 VFLO™ versions 241 1. three VFLO™ positive aspects AND MODULES 242 1. four version characteristic precis 245 1. five VFLO™ REAL-TIME 256 1. 6 facts specifications 258 1. 7 dating TO different versions 259 1. eight precis 260 1.
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Extra resources for Distributed Hydrologic Modeling Using GIS
If the aerial photography is collected at 1:25000 but the hydrography was compiled at a smaller scale, then the streams will not line up with the photography. Mis-registration is a common problem when 2. DATA SOURCES AND STRUCTURE 43 25 using generally available geospatial datasets that have been compiled at disparate scales. A similar effect of mis-registration may be observed when combining vector hydrography and raster elevation data because of differences in data structure. Digital aerial photography is available for many parts of the US either through government-sponsored acquisition or on a project basis.
Hydrol. , 9(1):pp. 55-68. H. of Agricultural Science, 4:1-24. S. Army Corps of Engineers Hydrologic Engineering Center, Davis California. Y. and B. Saghafian, 1991, CASC2D User’s Manual. Civil Engineering Report, Dept. of Civil Engineering, Colorado State University, Fort Collins, Colorado. , B. L. ” Water Resources Bulletin, AWRA, 31(3): 523-536. ” Water Resour. , 24(9):1501-1510. , 1988, Finite Element Analysis of Hydrologic Response Areas Using Geographic Information Systems. Department of Agricultural Engineering, Michigan State University.
1996) and others. Hydrologists have argued that there are too many degrees of freedom in distributed modeling vis-à-vis the number of observations. This concern does not take into account that if we know the spatial pattern of a parameter, we can adjust its magnitude while preserving the spatial variation. This calibration procedure can be performed manually by applying scalar multipliers or additive constants to parameter maps until the desired match between simulated and observed is obtained.