Denudation characteristics of the rockily eroded mountains in Seoul metropolitan area
1987
Woo, B.M. (Seoul National Univ., Suwon (Korea R.). Coll. of Agriculture)
To develop the rehabilitation measures for rockily denuded forest lands which are widely distributed in Seoul metropolitan area, erosional characteristics of denudation should, first of all, be evaluated and analysed. As a fundamental study for developing such technical measures, the rockily denuded lands were classified into 6 types according to denudation features of the mountain land, and also movements of stone debris-and-sand on rock-exposed hillslopes were measured and analysed. The 6 basic types of denudation features include (a) natural rock-outcrop-exposed land, (b) stone debris-and-sand scattered land, (c) stone debris-and-sand deposited land, (d) coarse sand producing bare land susceptible to weathering and erosion, (e) dwarfed pine growing land, and (f) torrential valley susceptible to the debris slides. In the stone debris-and-sand scattered hillslopes (type b), average amount of moved-down debris reached to about 3.0 ton/ha/yr due to surface washing and slidings. In the particle size distribution of the moved-down debris, it amounts to about 25% of 10-25mm, about 15% of 5-10mm, about 24% of 2-5mm, and about 36% of less than 2mm in diameter class, respectively. The detailed experimental studies should be accomplished further more about the denudation processes including weathering erosion and debris slides on rock-exposed hillslopes.
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