Water and sediment delivery process and hazard environment linking with drainage net system and landscape changes in catchments scale

水沙输送过程及灾害环境与排水网系统及流域规模景观变化的关系

基本信息

批准号：
12306008
负责人：
ARAYA Tohru
金额：
$ 28.47万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2003
项目状态：
已结题

项目摘要

Understanding how the sediment is transported through a catchment is a key issue for food and environmental resources management. Our research project aims to clear the sediment delivery ratios linking with catchment scale, climatic and geological settings and land use in Rim Pacific countries. The sediment production, storage and delivery process in source-to-sink (mountain to sea) sedimentary systems spaced during several square kilometer and thousands square kilometer was examined. The research was conducted in not only Hokkaido to Kyushu in Japan but also New Zealand, Australia and China in Rim Pacific. The result was summarized that the duration and magnitude of sediment storage was determined by catchment scale, averaged catchment slope and rainfall magnitude, and the flow rate and annual volume of suspended sediment were controlled by these factors Adding to it, the flume experimental study available for developing hydrological model ha been done. The influences of sedimentary cascades on riparian and aquatic ecological systems were also examined. The research project managed the international workshop for the source-to-sink sediment transport in catchment scale in Sapporo in 2003, which has invited sediment researchers from Australia, New Zealand, USA, Thailand and Korea. To mitigate and prevent sediment disasters the source-to-sink sedimentary cascades affected by changing catchnment system were successfully cleared in this study.

了解如何通过流域运输沉积物是食品和环境资源管理的关键问题。我们的研究项目旨在清除与流域量表，气候和地质环境以及边缘太平洋国家的土地利用相关的沉积物交付比率。检查了在几平方公里和数千平方公里间隔的源头到源（山到海）沉积系统中的沉积物生产，存储和交付过程。这项研究不仅在日本的北海道到九州，而且还在新西兰，澳大利亚和中国的Rim Pacific进行。总结说，沉积物存储的持续时间和幅度是通过集水量表，平均集水坡度和降雨量的幅度来确定的，并且由这些因素添加的流量和悬浮沉积物的年度控制，并添加了这些因素，可用于开发水文模型HA的FLUME实验研究。还检查了沉积层层对河岸和水生生态系统的影响。该研究项目于2003年在萨波罗的流域量表中管理了国际货币货币交通的国际研讨会，该研讨会邀请了来自澳大利亚，新西兰，美国，泰国，泰国和韩国的沉积物研究人员。为了减轻和防止沉积物灾难，在本研究中成功清除了受批量变化系统影响的来源到螺旋的沉积级联反应。