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首页> 外文期刊>砂防学会誌 >Changes in sediment discharge after the collapse of Mt. Bawakaraeng in south Sulawesi, Indonesia
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Changes in sediment discharge after the collapse of Mt. Bawakaraeng in south Sulawesi, Indonesia

机译：山崩后沉积物排放的变化。印度尼西亚苏拉威西省南部的Bawakaraeng

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The collapse of caldera walls of Mt. Bawakaraeng on 26th of March 2004 in South Sulawesi is one of the largest mass movements in the history of Indonesia. The collapsed material, calculated at approximately 232 million m~3, covers 8 km of the upstream part of Jeneberang River. The main purpose of this research is to evaluate the magnitude of the impact on the change of basin and how the impact decreases over time. A given amount of rainfall produces less discharge after the collapse and peak flows which normally occurred in the months of January are now found in the months of March. Before the collapse, every daily amount of rainfall corresponds to 0.6 value of daily discharge, though in 2006, it decreased to 0.45. Daily discharges are mostly low flows (less than 5 mm/day) except in the year of the collapse (2004). After the collapse, medium flows occurred more frequently and high flows (flow of over 90 mm/day) occurred in less frequency and lower values. Analysis of turbidity and discharge relationship at Bili-bili Dam located 31 km downstream of the collapse may be applied to understand the sediment exhaustion and the basin's potential rates of recovery. Bili-bili Dam's maximum turbidity rate increased significantly from 407 Nephelometric Turbidity Units (NTU) to 125,159 NTU after the collapse and turbidity's respond to discharge alters after the collapse. Peak turbidity rates normally fall faster than the discharge falling limb; nonetheless after the collapse, both values fall by approximately 50% daily.
机译：富士山火山口壁的坍塌。 2004年3月26日在南苏拉威西省举行的巴瓦卡拉恩（Bawakaraeng）是印度尼西亚历史上规模最大的群众运动之一。坍塌的物质约占2.32亿立方米3，覆盖了Jeneberang河上游8公里。这项研究的主要目的是评估对盆地变化的影响程度以及随着时间的推移影响如何减小。一定数量的降雨在坍塌后产生的流量减少，通常在1月的几个月出现峰值流量，现在在3月的几个月出现峰值流量。在倒塌之前，每天的降雨量相当于每天的排放量的0.6，尽管在2006年下降到0.45。除了倒塌的那一年（2004年）以外，每天的排放量大多为低流量（每天少于5毫米）。坍塌之后，中等流量发生的频率更高，高流量（流量超过90毫米/天）发生的频率更低，值更低。倒塌下游31 km的比利比比大坝的浊度和流量关系分析可用于了解沉积物的枯竭和盆地的潜在恢复率。倒塌后，Bili-bili大坝的最大浊度从407浊度单位显着增加到125,159 NTU，并且在坍塌后浊度对流量的响应有所变化。峰值浑浊率通常比排放下降肢下降得快；但是，在崩溃之后，这两个值每天都下降约50％。

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