(Erosion Prediction in Ungauged Basins: Integration Methods and Techniques (Proceedings of Symposium HS01 Held During IUGG 2003 at Sapporo, July 2003), IAHS Publication No. 279, pp. 68–78).
The mountains surrounding Kyoto and its vicinity were completely devastated until about 100 years ago because of over-logging for firewood and lumber. The area's bedrock of weathered granite was bare in those days, and the mountains were white as if covered with snow. The production of large volumes of sediment raised riverbeds downstream and caused frequent flooding. Intense hillside sabo works (erosion control works), comprised of terracing and tree plantations, have been implemented for the last 100 years. Today, the area is almost completely covered with vegetation. Erosion rates in the area have been measured for the last 30 years. The data obtained were analysed and an erosion prediction method was developed.The method uses rainfall, topography of the slopes and basins, and the condition of vegetation as parameters. The method was applied to the ar3ea to estimate the erosion and sediment outflow 100 years ago. Riverbed elevation changes are also estimated using a sediment routing method based on the estimated erosion as a boundary condition.
Air photos, Bedload, Erosion, Hillside works, Historical map, Riverbed elevation change, Sediment routing, Suspended load, Washload
