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“洪水和地貌变化对灾难的研究”，准备了三个子主题；（1）降雨和地表径流的特征，（2）泥沙径流和河流变化，以及（3）与主题（1）和（2）相关的海滩侵蚀。第三个主题是针对巴厘岛岛的珊瑚礁以及位于中南南颌骨上的半卫生海滩的关注。在进行研究时，采用了数据分析，数据收集和数值模拟的观察结果。结果被弄清楚如下：（1）长期和短期降雨秋季径流方法其在上布兰特斯中提出的，并且通过使用Karankates Dam reserver的径流数据来测试适用性。实现了应用遥感图像和地理信息系统，土地覆盖分类和地貌特征。降雨径流是通过运动浪潮方法计算的……更多的山坡和河道通道，而支流的沉积物则通过单位功率方法估算。（2）评估一维河流变化的数值方法，以及开发了两个维度的河流变化，既有接触量和悬浮量和悬浮量和悬念，又是从事部落的供应。这些方法可以预测纵向床的变化，形成凹入河岸的局部横梁和床材料的繁殖，并应用于Brantas来评估河流变化。此外，提出了一种方法，该方法是通过潮汐储层来减少河口沉积的方法。它强调，潮汐储层的光学操作可防止河口严重沉积。（3）基于二维管理方程式和数据分析，开发了海滩侵蚀方法。它预测了风引起的和波诱导的电流以及海滩横载过程。已经进行了数值模拟，以预测耕地珊瑚礁的海滩过程以及由于河流途径的快捷方式而迅速变化的沉积物供应。较少的

项目成果

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。

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)

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)

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。

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