Accession Number:
ADA180440
Title:
Parameterization of Stage Frequency through Physically-Based Stochastic Modeling for Ungaged Basins.
Descriptive Note:
Final rept. 1 Oct 83-31 Dec 86,
Corporate Author:
COLORADO STATE UNIV FORT COLLINS DEPT OF CIVIL ENGINEERING
Personal Author(s):
Report Date:
1987-04-01
Pagination or Media Count:
145.0
Abstract:
A complete hydraulic routing model for watershed runoff based on flood routing technique of kinematic wave approach for overland flow and channel flow is developed. Physically-based geomorphologic expression for hydrograph characteristics of ungaged watersheds are derived. A comparison limited to a set of contrived watersheds with the existing methods available in the literature has revealed that the new expressions predict the hydrograph characteristics with much improved accuracy than the existing methods. A hydraulic routing approach is also used to develop alternate expressions for hydrograph characteristics. The geomorphologic expressions for hydrologic response are used in a probabilistic approach for developing parameterized flood frequency curves which employs the convolution of joint probability distribution function of rainfall intensity and duration. An existing space-time stochastic rainfall model provided synthetic sequences of rainfall as input to the hydraulic routing model both of which are used for deriving flood frequency curves via simulation.
Descriptors:
- RAINFALL
- *RUNOFF
- *WATERSHEDS
- *FLOODING
- ACCURACY
- CHANNEL FLOW
- FLOODS
- FLOW
- HYDRAULICS
- HYDROGRAPHY
- KINEMATICS
- MATHEMATICAL MODELS
- MODELS
- PROBABILITY
- PROBABILITY DISTRIBUTION FUNCTIONS
- RAINFALL INTENSITY
- ROUTING
- SEQUENCES
- SIMULATION
- STOCHASTIC PROCESSES
- TIME
- WAVES
- FREQUENCY
- GEOMORPHOLOGY
- MATHEMATICAL PREDICTION
- PARAMETRIC ANALYSIS
- TIME SERIES ANALYSIS
- GEOGRAPHICAL DISTRIBUTION
Subject Categories:
- Hydrology, Limnology and Potamology
- Meteorology