Disasters due to floods, sediment runoff and beach erosion

洪水、泥沙径流和海滩侵蚀造成的灾害

• 批准号: 09044188
• 负责人: EGASHIRA Shinji
• 金额: $ 4.61万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09044188/
• 关键词: Rainfall Runoff; Sediment Runoff; Sediment Hazards; Flood Hazards; River Change; Coastal Change; Flood Hazard Mitigation; Disaster Prevention Countermeasures; 海岸浸食制御; 海浜変形; 海岸制御侵食

This joint research has been conducted to develop methods for predicting rainfall runoff, sediment yield and runoff, river changes and coastal erosion, as well as to develop scientific basis for water and sediment hazards mitigation in Indonesia. The principal results are swninarized as follows :A long- and short-term rainfall-nuioif model was tested to evaluate the water balance and rainfhll a runoff disehaige in the Sutami reservoir basin. The results show this model can reproduce daily rainfall-runoff using the variable infiltration capacity model, even in tropical drainage basins.Remote sensing images and geographic information systems (GIS) were used for establishing a distributed hydrological model for flood and sediment runoff The model applied to the Putili river, a tributary of the Brantas, reproduced the sediment yield during the seven years following the 1990 eruption of Mt. Kehid and estimated the effective infiltration depth that contributes to sediment yield.Based on samp … More led bed materials at about thirty points in the basin, soil property and particle size were investigated. One- and two- dimensional bed variation models were applied to the middle reach of the Brantas. The l-D model investigated the effect of channel width on bed variation and the effect of suspended load, and revealed that the rapid change in channel width causes greater river bed variation. The 2-D model showed that the stream bifurcation took place in broadening reaches and suspended load accentuated the coarsening of sediment at the inner bank of curved sections of the river.Coastal monitoring and numerical prediction have been conducted in Pangandaran coast (South Java), facing the Indian Ocean, were river short-cut works are under construction.One-year simulation of tide- and wind-driven circulation in Java Sea, wiuich is influenced by the west- and east- monsoons, was carried out using a three-dimensional hydrodynamic model incorporating the influence of waves. A third-generation ocean wave prediction model, WAM, was employed to calculate the wave fields and the wave-dependent sea surface and bottom drag coefficients.Six-hourly wind fields at 10 in above the sea surface ware given by ECMLWF's global climate reanalysis data as a representative wind. The trajectory of munnerical tracers was simulated to understand transport of materials at both the sea surface and bottom. A 3-D beach change prediction model which consists of a bore type breaking wave model, 3-D near-shore circulation model and sediment transport model, has been developed in this project. Its verification has been continued on coasts both in Japan and Indonesia. Less

这项联合研究的目的是开发预测降雨径流、产沙量和径流、河流变化和海岸侵蚀的方法，并为减轻印度尼西亚的水和沉积物危害奠定科学基础。主要结果如下： 对苏塔米水库流域的水平衡和降雨径流排水模型进行了长期和短期降雨量模型的检验。结果表明，即使在热带流域，该模型也可以使用可变入渗能力模型重现每日降雨径流。遥感图像和地理信息系统（GIS）用于建立洪水和泥沙径流的分布式水文模型。该模型应用于布兰塔斯河的支流普蒂利河，重现了 1990 年克希德山喷发后七年的泥沙产量，并估计 有助于产沙的有效入渗深度。根据流域内约 30 个点的带床材料样本，对土壤性质和颗粒尺寸进行了调查。一维和二维河床变化模型应用于布兰塔斯河中游。 l-D模型研究了河道宽度对河床变化的影响以及悬浮荷载的影响，发现河道宽度的快速变化会导致更大的河床变化。二维模型显示，河段变宽，悬浮荷载加剧了河流弯曲段内岸沉积物的粗化。在面向印度洋的庞岸达兰海岸（南爪哇省）进行了海岸监测和数值预报，河流捷径工程正在建设中。爪哇海潮汐和风驱动环流的一年模拟， 受西季风和东季风的影响，是使用考虑了波浪影响的三维水动力模型进行的。采用第三代海浪预测模型WAM计算波场以及与波浪相关的海面和底部阻力系数。ECMLWF全球气候再分析数据给出的海面以上10英寸处的6小时风场作为代表风。对人类示踪剂的轨迹进行了模拟，以了解海面和海底的物质传输。本项目开发了三维海滩变化预测模型，由孔型破碎波模型、三维近岸环流模型和泥沙输运模型组成。日本和印度尼西亚海岸的核查工作仍在继续。较少的

项目成果

Fujita, M., H.Jin, S.Egashira, Y.Satofuka, F.Nakanishi, M.Mouko, and Dyah R.P.: "A prediction of the bed variation in Brantas middle reach" Prof.of Symp.on Japan-Indonesia IDNDR Project, Bandung. 455-460 (1998)

Fujita, M., H.Jin, S.Egashira, Y.Satofuka, F.Nakanishi, M.Mouko, and Dyah R.P.：“布兰塔斯中游河床变化的预测”Prof.of Symp.on Japan-Indonesia

Fujita, M., H.Jin, S.Egashira, Y.Satofuka, F.Nakanishi, M.Mouko and Dyah R.P.: "A method for predicting bed variation in Brantas middle reach" Proc.of International Symposium on Natural Disaster Prediction and Mitigation, Kyoto. 375-382 (1997)

Fujita, M., H.Jin, S.Egashira, Y.Satofuka, F.Nakanishi, M.Mouko 和 Dyah R.P.：“预测布兰塔斯中游河床变化的方法”Proc.of International Symposium on Natural Disaster Prediction and

Nining Sairi Ningsh and T.Yamashita: "Simulation of bottom particle distribution on Java sea floor" Proc.of Symp.of Japan-Indonesia IDNDR Project, Bandung. 349-356 (1998)

Nining Sairi Ningsh 和 T.Yamashita：“爪哇海底底部颗粒分布的模拟”Proc.of Symp.of Japan-Indonesia IDNDR Project，万隆。

Ningshi, N.S.and T.Yamashita: "Three-dimensional model of tide and wind-driven circulation in Java Sea" Proc.of International Symposium on Natural Disaster Prediction and Mitigation, Dec.1-5,1997, Japan. 383-399 (1997)

Ningshi，N.S.和T.Yamashita：“爪哇海潮汐和风驱动环流的三维模型”Proc.of International Symposium on Natural Disaster Prediction and Mitigation，1997年12月1-5日，日本。

Kardana and Syamsudin: "The Concept of integrated beach protection,Gabus-Dadap beach,Indramayu,West Java" Proc.of Symp.of Japan-Indonesia IDNDR Project. 281-290 (1998)

Kardana 和 Syamsudin：“综合海滩保护的概念，Gabus-Dadap 海滩，Indramayu，西爪哇”Proc.of Symp.of 日本-印度尼西亚 IDNDR 项目。