Development of hybrid simulator with physical and statistical models for landform change

开发具有地形变化物理和统计模型的混合模拟器

• 批准号: 16500647
• 负责人: KUMAMOTO Takashi
• 金额: $ 2.43万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16500647/
• 关键词: landform simulator; geomorphometric measurement; DEM resolution; landslide magnitude-frequency; 5m-DEM; slope frequency distribution; curvature frequency distribution; stream network model

The main purposes of the landform simulator in this research project are (1)to model the magnitude-frequency relationship of landsides in the mountain section of river streams under the assumption that large scale of landslides are induced by the large ground shaking caused by the earthquakes and the frequency is related to that of seisimicity, and (2)to include physical relationship satisfying the law of constancy of mass along the river stream. We conducted following three subjects to achieve these purposes :(a)Discuss the relationship between DEM (digital elevation model) resolution and geomorphometric results such as slope and laplacian and show that at least 25m or more detailed DEM is needed to simulate the landform change along river stream.(b)Calculate seismic magnitude-frequency relationship in Japanese seismotectonic provinces and discuss the quantitative evaluation how to include this relationship into landform simulator.(c)Develop the landform simulator programming code running on Microsoft-Windows by the use of the Borland C++ Builder, which are capable of reading initial topography, reading parameters such as diffuse coefficient, retreat coefficient, denudation rate, uplift rate and base altitude, and visualize results. We simulate the landform change in the Akaishi mountains central Japan by using this code and the result show the appearance of steep scarp in cross section of landforms and slope histogram, which could not conduct previous simulators.

本研究项目中地形模拟器的主要目的是（1）在假设地震引起的大地面震动引发大规模滑坡的情况下，对河流山区地段的震级频率关系进行建模(2)包括满足沿河流质量恒定定律的物理关系。为了实现这些目的，我们进行了以下三个课题：（a）讨论DEM（数字高程模型）分辨率与坡度和拉普拉斯等地貌测量结果之间的关系，并表明至少需要25m或更详细的DEM来模拟沿线的地貌变化(b)计算日本地震构造省的地震震级频率关系，并讨论如何将这种关系纳入地形模拟器的定量评价。(c)开发在Microsoft-Windows上运行的地形模拟器编程代码使用Borland C++ Builder，能够读取初始地形，读取扩散系数、后退系数、剥蚀率、隆升率、基准高度等参数，并将结果可视化。我们使用该代码模拟了日本中部赤石山脉的地貌变化，结果显示地貌横截面和坡度直方图中出现了陡峭的陡坡，这是以前的模拟器无法进行的。

项目成果

Magnitude-Frequency distribution derived from earthquake and active fault catalogues based on seismotectonic province map of the Japanese islands

基于日本列岛地震构造省图的地震和活动断层目录推导的震级频率分布

• 发表时间: 2004
• 期刊: Active Fault Research 24
• 作者: Kumamoto;T.;Yamada;S.
• 通讯作者: S.

山地の地形計測のためのDEMの解像度に関する一考察

山区地形测量DEM分辨率研究

• 发表时间: 2005
• 期刊: 写真測量とリモートセンシング 44(1)
• 作者: 田中 靖;大森博雄
• 通讯作者: 大森博雄

Examination of aperiodicity parameters for the Brownian Passage Time model using intraplate paleoearthquake data in Japan

使用日本板内古地震数据检查布朗通过时间模型的非周期性参数

• 发表时间: 2005
• 期刊: Active Fault Research 25
• 作者: Kumamoto;T.;Hamada
• 通讯作者: Hamada

Examination of aperiodicity parameters for the Brownian Passeage Time model using intraplate paleoearthquake data in Japan

使用日本板内古地震数据检查布朗通过时间模型的非周期性参数

• 发表时间: 2005
• 期刊: Active Fault Research 25
• 作者: Kumamoto;T.
• 通讯作者: T.