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A Microcomputer‐Based Geographic Information System for Hydrologic Simulation
Author(s) -
Muzik Ivan,
Chang Chiadih
Publication year - 1993
Publication title -
computer‐aided civil and infrastructure engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.773
H-Index - 82
eISSN - 1467-8667
pISSN - 1093-9687
DOI - 10.1111/j.1467-8667.1993.tb00221.x
Subject(s) - hydrograph , vflo , surface runoff , runoff curve number , runoff model , flood myth , hydrology (agriculture) , geographic information system , hydrological modelling , environmental science , microcomputer , computer science , monte carlo method , remote sensing , geology , statistics , mathematics , geography , geotechnical engineering , ecology , chip , telecommunications , archaeology , climatology , biology
A microcomputer‐based geographic information system (GIS) supporting hydrologic simulation is described. The hydrologically‐oriented GIs can automatically provide parameters required for prediction of flood hydroghraphs and physically‐based synthetic flood frequency curves for ungaged watersheds. The hydrologic model uses the Soil Conservation Service (SCS) runoff curve number (CN) method and a synthetic unit hydrograph to represent the physical transformation of rainfall into runoff The standard SCS method was modified to account for randomness of key parameters whose probability distributions can be derived from regional rainfall and runoff data. The GIs, and hydrologic theory and techniques, including the modified SCS method, derivation of a regional dimensionless unit hydrograph, and Monte Carlo simulation procedure, are described. Results of hydrologic analysis and simulation by the system implemented for an area of 11000 km 2 in the Alberta foothills are presented.