クルド火山噴火後のブランタス川における河床変動および河床材料の変化特性 RIVERBED VARIATION AND CHANGE OF BED MATERIAL IN THE BRANTAS RIVER AFTER AN ERUPTION OF MT. KELUD
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So far huge sediment production due to the eruption of Mt.Kelud has given serious damage to the Brantas river basin. On the other hand the eruption has provided soil and sand for agricultural land and construction material. So, as a first step to establishing an advanced control system both of the sediment runoff and the sediment utilization, we have investigated the change of sediment transport properties after the eruption in 1990. The field survey result shows that the sever sediment deposition occurred immediately after the eruption, but 1 year after the eruption the bed aggradation changed into the bed degradation because of active sand mining. Also we obtained the sediment supply condition at the confluences with the tributaries after the eruption and presented a way to estimate the condition. Furthermore the field observation result on wash load indicates the wash load transport rate decreased rapidly after the eruption.
- PROCEEDINGS OF HYDRAULIC ENGINEERING
PROCEEDINGS OF HYDRAULIC ENGINEERING (50), 1003-1008, 2006
Japan Society of Civil Engineers