Evaluation of sediment and carbon storage functions in the formative processes of alluvial plains

冲积平原形成过程中沉积物和碳储存功能评价

• 批准号: 13308004
• 负责人: FUJIMOTO Kiyoshi
• 金额: $ 16.47万
• 依托单位: Nanzan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13308004/
• 关键词: Alluvial plains; GIS; Sediment budget; Carbon storage; σ^<13>C; Pollen analysis; Sea-level changes; 炭素安定同位対比

In order to clarify the sediment and carbon storage in the alluvium, non-disturbed boring cores which reach the Lower sand layer were collected in the Lower Tokachi River Plain in Hokkaido, the Lower Yahagi River Plain in central Japan and the Lower Oyodo River Plain in southeastern Kyushu and bulk density and carbon contents in each layer of alluvium were clarified. On the other hand, the volume in each layer was estimated using ArcView 3D Analyst for the Lower Tokachi River Plain and the Lower, Yahagi River Plain. Stored sediment and carbon were calculated using the bulk density, carbon contents and the estimated volume in each layer for the two alluvial plains. The total stored carbon in the alluvium in each plain was estimated to be 0.5 to 0.6 % of present global emission of fossil carbon. Stored carbon in mangrove sediments in the Asia-Pacific region was also compiled and the carbon sequestration ability was evaluated.In order to estimate the source of stored carbon, pollen and σ^<13>C analyses were applied for the boring cores. As a result, it was indicated that the relative contribution of each source, such as terrestrial plants, marine-non-marine planktons, and so on will be possible to estimate by combining CN ratio and σ^<15>N value.The relative sea-level changes were clarified in the Lower Furen River Plains, eastern Hokkaido. Sea-level rise between 5000 and 4000 cal BP and sea-level fall between 4000 and 2000 cal BP, which are common trends in the Asia-Pacific Region, were found out. Three abrupt events of sea-level fall, which are seemed to have been caused by seismic uplift, were also detected.

为了澄清冲积物中的沉积物和碳储存，在北海道的下托卡奇河平原，日本中部的下Yahagi河平原和东南kyushu和kyushu河中的下Yahagi河平原上收集了到达下层沙层的无干扰核心，并收集了kyushu的下层河平原，并在每层中均列出了kyushu的密度和碳含量。另一方面，使用Arcview 3D分析师估计每一层中的体积，下托卡奇河平原和下部Yahagi河平原。使用块状密度，碳含量和两层冲积平面的每一层中的大量密度，碳含量和估计体积来计算存储的沉积物和碳。估计在每个平原的冲积层中储存的总碳估计占化石碳当前全球排放的0.5至0.6％。还编制了亚太地区红树林沉积物中的碳，并评估了碳固算能力。为了估算储存的碳，花粉和σ^<13> C分析的来源，用于钻孔核心。结果，据表明，每个来源的相对贡献，例如陆生植物，海洋 - 非海洋浮游生物，等等，可以通过将CN比和σ^<15> N值组合来估算。在荷兰河下部河流Plains中阐明了相对的海平面变化。发现海平面上升在5000至4000 cal BP和海平面之间，在4000至2000 Cal BP之间，这是亚太地区的常见趋势。还发现了三个突然的海平面跌倒事件，这些事件似乎是由地震隆起引起的。

项目成果

FUJIMOTO, K. et al.: "Bulk density and carbon content rate of alluvium in the Lower Tokachi River Plain, northern Japan."ACADEMIA (Natural Science and Health and Physical Education). 11. 57-64 (2003)

FUJIMOTO, K. 等人：“日本北部十胜河下游平原冲积层的堆积密度和碳含量。”ACADEMIA（自然科学与健康与体育）。

KAWASE, K.: "Geomorphic evolution of the coastal lowlands and changes in the sedimentary environment in the Lower Kumozu River, Mie Prefecture."Geographical Review of Japan. 76-4. 211-230 (2003)

KAWASE, K.：“三重县云津江下游沿海低地的地貌演化和沉积环境的变化。”日本地理评论。

藤本 潔: "十勝川下流低地における沖積層の容積重と炭素含有率"南山大学紀要(アカデミア』自然科学・保健体育編). 第11巻. 57-64 (2003)

藤本清：“十胜川下游低地冲积层的体积重量和碳含量”南山大学学报（学术界）自然科学/健康和体育版第 11 卷（2003 年）。

川瀬久美子: "三重県雲出川下流部における海岸低地の形成と堆積環境の変遷"地理学評論. 76巻・4巻. 211-230 (2003)

河濑久美子：“三重县久莫德河下游沿岸低地的形成和沉积环境的变化”，地理评论，第 76 卷，第 4 卷，211-230（2003 年）。

OHIRA, A.: "Holocene sea-level changes and evolution of the Lower Tokachi River Plain, Hokkaido, Japan"SUPPLEMENTI di GEOGRAPHIA FISICA e DINAMICA QUATENARIA. (in press).

OHIRA, A.：“全新世海平面变化和日本北海道十胜河下游平原的演化”地理地理和地质学的补充。