SEDIMENT INFORMATION MAPPING METHOD AND SEDIMENT INFORMATION MAPS AND PROPERTY INFORMATION SYSTEM

摘要

PURPOSE: A method for writing a sediment information map, a sediment information map, and a system for providing property information by each grid are provided to easily obtain information about an earth and sand outflow route and an earth and sand outflow amount. CONSTITUTION: A soil erosion amount is calculated by a USLE(Universal Soil Loss Equation). The soil erosion amount is accumulated along with a flow direction by a ground surface flow tracking method. An area which contributes to earth and sand outflow of each grid point is calculated. The earth and sand outflow amount of all grid points is calculated by applying a basin area-quicksand delivery rate relation of a TRB(Transportation Research Board). The earth and sand outflow amount by a grid point is expressed in a topographical map in a visual information type.