Physically-based-dating for pond sediments

池塘沉积物的物理测年

• 批准号: 05558006
• 负责人: KASHIWAYA Kenji
• 金额: $ 2.24万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05558006/
• 关键词: SEDIMENT; ARTIFICIAL NUCLIDE; EROSION; CATCHMENT; HEAVY RAINFALL; 侵食

Analyzes of physical properties in pond sediments show that the remnant of mass movements can be traced in the grain-size sequences of sediments in the drainage areas where there have beeen heavy rainfalls in 1964 ; the years of mass movements due to heavy reinfalls show up as prominent coarsening in the grain-size distribution. The date is estimated with the ^<137>Cs concentration ; the peaks (about 1962) in the concentration of sediment sequences from three ponds are assumed to be in the same phase of sedimentary environment.Grain size variations in the ponds in each area show similar tendency ; there have been similar sedimentary and/or hydro-erosional conditions. Average sedimentation rate during past 30 years in the center of sampling ponds, which can be calculated by the use of 137Cs, is closely related to geomorphological settings in each drainage basin.

对池塘沉积物物理性质的分析表明，在1964年发生暴雨的流域沉积物的粒度序列中可以追溯到质量运动的残余物，强降水引起的质量运动年份在粒度分布上表现出明显的粗化。用~(137)Cs和~(137)Cs浓度估算时间；假定三个池塘沉积物序列的浓度峰值(约1962年)处于同一沉积环境阶段。每个地区池塘的粒度变化趋势相似；存在相似的沉积和/或水蚀条件。采样池中心近30年来的平均沉积速率与各流域的地貌环境密切相关，可用~(137)Cs计算。

项目成果

柏谷健二他: "地形改変地における周辺湖沼の土砂堆積量の考察" 地形. 15. 297-298 (1994)

Kenji Kashiwaya 等人：“考虑地形改变地区周围湖泊和沼泽的沉积物量”《地貌学》15. 297-298 (1994)。

KASHIWAYA ET AL.: "SURFACE EROSIONAL ENVIRONMENT AND POND SEDIMENT INFORMATION" STEEPLAND GEOMORPHOLOGY(Wiley). (in press). (1995)

KASHIWAYA 等人：“表面侵蚀环境和池塘沉积物信息”STEEPLAND GEOMORPHOLOGY（Wiley）。

KASHIWAYA ET AL.: "MASS MOVEMENT AND POND SEDIMENTATION IN A LAND-TRANSFORMATION AREA." TRANS.J.G.U.15. 297-298 (1994)

KASHIWAYA 等人：“土地改造区域的大规模运动和池塘沉积。”

KASHIWAYA ET AL.: "SURFACE EROSIONAL ENVIRONMENT AND POND SEDIMENT INFORMATION" WILEY & SONS. (1995)

KASHIWAYA 等人：“地表侵蚀环境和池塘沉积物信息”WILEY

KASHIWAYA ET AL.: "SURFACE EROSIONAL ENVIRONMENT AND POND SEDIMENT INFORMATION" STEEPLAND GEOMORPHOLOGY. (in press). (1994)

KASHIWAYA 等人：“表面侵蚀环境和池塘沉积物信息”陡峭地貌。