冠岳山地域岩石荒廢地의 綠化工法開發에 關한 硏究

Abstract

This research has bken carried out for two years to develop the fundamental models and techniques concerning the practical erosion control measures and rehabilitation policy. for the denuded rocky forestland and eroding valley of Mt. Gwanak area in the capital region. The main results obtained could be summarized as follows; 1. In planting with the selected seedling on denuded rocky forestland, it would be more effective to introduce the "containerized seedling and planting practices" having the developed specifications of each species. It is also required to introduce the fertilizing practices to rehabilitate and accelkrate the deteriorated and dwarfed vegetation status in this area. 2. The denuded land of Mt. Gwanak area could be devided into 6 types as .described on the conclusions. "Stone-debris catching' barrier structures on the slope" and "debris-and-water holding trenchiwall structures" which have been developed as a new rehabilitating models for the debris sliding sites are required for further study. 3. The most hazardous point where landslides occurred frequently is correspond to the upper depressed area of end of the. first-order valley on the topographic map (I : 5000). It is, therefore, needed to precede such the preventive protecting counter-measures as drains and retaining walls at the corresponding points in "landslide hazard areas." 4. To stabilize the denuded torrential stream, such structural measures as debris dam, low-debris dam, check dam, stream grade stabilization structures and revetment must be constructed in connection with both upper and lower structures. 5. At the outlet of small hazardous valley where landslides occurr frequently, to raise the effect of preventive erosion control it is essential to install the "sand-and-stone catching basin structures" like Pokpogol and Hyeonggol of Gwacheon.