Research on disasters by floods and geomorphological changes

洪水灾害与地貌变化研究

• 批准号: 06044113
• 负责人: EGASHIRA Shinji
• 金额: $ 5.82万
• 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: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06044113/
• 关键词: Rainfall runoff; sediment runoff; River bed Variation; Beach erosion; Erosion Control; Flood Hazard; Sediment hazard; Countermeasures of natural Hazards; 海岸浸食制御

In order to conduct "research on disasters by flood and geomorphological changes", three sub-themes are prepared ;(1) Characteristics of rainfall and surface runoff,(2) Sediment runoff and river changes, and(3) Beach erosion.Discussions associated with topics (1) and (2) are made mainly on the problems in the Brantas river. The third topics is conducted with attention focused on the coral reef of Bali island as well as on the Semalan beach located on the north-central Jawa. In performing the study, data-analyzes, observations for data collections and numerical simulations are employed. Results are sammerized as follows :(1) A long and short terms rain fall runoff method its proposed in the upper Brantas, and is applicability is tested by using the runoff data at Karankates dam reservoir. Applying remote sensing images and a geographic information system, land cover classification and geomorphologic characteristics are realized. Rainfall runoff was computed by the kinematic wave method … More for the hillslopes and river channels, while sediment yields from tributaries was estimated by unit stream power method.(2) Numerical methods evaluating one dimensional river change as well as two dimensional one are developed, taking both contact loads and suspended sediment, and sediment supplies from tributaries into consideration. The methods predict longitudinal bed variation, local crosions forming concave river banks and propagation of bed material, and were applied to the Brantas to evaluate the river change. In addition, a method is proposed by means of a tidal reservoir for reducing the river mouth sedimentation. It emphasizes that optical operation of tidal reservoir prevents the river mouth from severe sedimentation.(3) A beach erosion method is developed, based on 2-D governing equations and data analyzes. It predicts wind-induced and wave-induced currents and beach crosion process. Numerical simulations have been conducted to predict the beach processes for cultivated coral reef as well as for rapid change of sediment supply due to shortcut of river course. Less

为了进行“洪水灾害和地貌变化的研究”，准备了三个分主题：（1）降雨和地表径流的特征，（2）沉积物径流和河流变化，（3）海滩侵蚀。与主题（1）和（2）相关的讨论主要是关于Brantas河的问题。第三个主题的重点是巴厘岛的珊瑚礁以及位于中北部爪哇岛的Semalan海滩。在进行研究，数据分析，观察数据收集和数值模拟。（1）提出了上布兰塔斯地区长、短期降雨产流方法，并利用Karankates水库的径流资料对该方法的适用性进行了检验。应用遥感影像和地理信息系统，实现了土地覆盖分类和地貌特征。降雨径流采用运动波法计算 ...更多信息 坡面和河道的产沙量采用单位流功率法估算。(2)数值方法评估一维河流变化以及二维一个开发，同时考虑接触负荷和悬沙，泥沙供应从支流。该方法预测纵向河床变化，局部crosions形成凹河岸和河床物质的传播，并应用于Brantas的河流变化进行评估。此外，还提出了利用潮汐水库减少河口淤积的方法。强调潮汐水库的优化调度可以防止河口严重淤积。(3)基于二维控制方程和数据分析，建立了一种海滩侵蚀计算方法。预报了风、浪诱导流和海滩冲淤过程。本文对人工珊瑚礁的海滩过程和河道缩短引起的泥沙供应的快速变化进行了数值模拟。少

项目成果

Tanakamaru,H.,Isnugroho and Chr.kristijatno: "Hydrological characteristics of the Upper area of the Brantas river" Japan-Indonesia Joint research on Natural Hazard Prediction and Mitigations.125-139 (1994)

Tanakamaru,H.,Isnugroho 和 Chr.kristijatno：“布兰塔斯河上游地区的水文特征”日本-印度尼西亚自然灾害预测和缓解联合研究.125-139 (1994)

Takara,T.,S.Egashira,Dyah R.P.,Irwan S.and Rahardjanto: "Analsis of land surface conditions in the Brantas River Basin based on satellite remote sensing images" 京都大学防災研究所年報. (発表予定). (1997)

Takara, T.、S. Egashira、Dyah R.P.、Irwan S. 和 Rahardjanto：“基于卫星遥感图像的布兰塔斯河流域地表状况分析”京都大学防灾研究所年度报告（待出版）。 (1997)

T.Yamashita,Y.Tsuchiya and H.Yoshioka: "Quasi-Three dimansional model for storm surges and is verification" Proc.24th.Conf.on Coastal Eng.,ASCE. 901-915 (1994)

T.Yamashita、Y.Tsuchiya 和 H.Yoshioka：“风暴潮的准三维模型及其验证”Proc.24th.Conf.on Coastal Eng.，ASCE。

Tsuchiya,Y.,T.Yamashita and T.Izumi: "Erosion control by considering large scale coastal behavior" Proc.24th Int.Conf.on Coastal Eng.,ASCE. 3378-3392 (1994)

Tsuchiya,Y.,T.Yamashita 和 T.Izumi：“考虑大规模沿海行为的侵蚀控制”Proc.24th Int.Conf.on Coastal Eng.，ASCE。

M.Fujita.,S.Egashira,H.S.Jin and F.Nakanishi: "Characteristics of bed variation in Brantas middle reach" Proc.of Work Shop on Disasters Caused by Floods and Geomorphological Changes and Their Mitigations,Yogyakaruta,Indonesia,ministry of Public Works,Indo

M.Fujita.、S.Egashira、H.S.Jin 和 F.Nakanishi：“Brantas 中游河床变化特征”Proc.of Work Shop on Disasters Caused by Floods and Geomorphological Changes and Their Mitigations，日惹，印度尼西亚，公共部