Field study on mechanism of hardness variation of bottom sediment of mud flat in lagoon

泻湖泥滩底泥硬度变化机理现场研究

• 批准号: 04650468
• 负责人: UEHARA Tadayasu
• 金额: $ 1.28万
• 依托单位: TOHOKU GAKUIN UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650468/
• 关键词: Gamo Lagoon; Mud flat; Bottom sediment; Hardness; Cone penetrometer; Benthos; Change of bottom; Bioturbation; ラグーン; 底面のかたさ; 底面支持力; 間隙比; 底面地形の変動; 光電式砂面計

1.Hardness of bottom of tidal flat was expressed by muximum bearing stress measured by cone penetrometor which had 6cm diameter circular plate.2.Maximum bearing stress was 1.64kg/cm^2, and minimum bearing stress was 0.21kg/cm^2. and baering stress varied seasonally.3.Appearance of variation of bearing stress was classfied two categories. Sandy type had following character : bottom sediment was sandy, and mearing point was near mainflow, and it was near center of tidal flat, and height of bottom was high. Sandy and muddy type had following character that bottom sediment was sandy and muddy, and mearing point was out of mainflow, and it was near edge of tidal flat, and height of bottom was low.4.In sandy type, bearing stress was large, espetially in summer season and its variation was large. In sandy and muddy type, bearing stress was small, espetially in summer season and its variation was small.5.Bearing stress was larger in explosure conditions than in under water conditions.6.Properties of bottom sediments varied vertically.7.In one case, effect of benthos on bearing stress was large and in another case, it was small.

1.用直径为6cm的圆板锥形测压仪测得的最大承压应力表示潮滩底的硬度，最大承压应力为1.64kg/cm ^2，最小承压应力为0.21kg/cm ^2。3.承压应力变化的表现形式可分为两类。桑迪型具有以下特点：底质为桑迪，交汇点靠近主流，靠近潮滩中心，底质高。桑迪泥型具有底质桑迪泥，交汇点在主流外，靠近潮滩边缘，底高低的特点。4.桑迪泥型，承压应力大，尤其是夏季，且变化大。桑迪和淤泥质底质沉积物的承压应力较小，尤其是夏季，且变化较小; 5.爆发条件下的承压应力大于有水条件下的承压应力; 6.底质沉积物的性质在垂向上存在差异; 7.底栖生物对承压应力的影响有时较大，有时较小。

项目成果

上原忠保: "蒲生ラグーンの地形変化" 土木学会東北支部技術研究発表会講演概要. 208-209 (1993)

Tadayasu Uehara：“蒲茂泻湖的地理变化”日本土木工程师学会东北分会技术研究会议上的演讲摘要 208-209（1993）。

TADAYASU,UEHARA: "Field studies on variation of hardness of tidal flat surface in Gamo Lagoon." Proceeding of 49th annual conference of JSCE. Vol.2. (1994)

TADAYASU,UEHARA：“蒲茂泻湖潮坪表面硬度变化的实地研究。”

上原忠保: "蒲生ラグーンにおける干潟表面の固さの変化" 土木学会東北支部技術研究発表会講演概要. 196-197 (1993)

Tadayasu Uehara：“蒲茂泻湖潮汐平坦表面硬度的变化”日本土木工程师学会东北分会技术研究会议的演讲摘要 196-197（1993 年）。

上原忠保: "蒲生ラグーンの干潟の露出に及ぼす干潟地形変化の影響" 土木学会年次学術講演会講演概要. 970-971 (1993)

Tadayasu Uehara：“滩涂地形变化对蒲茂泻湖滩涂暴露的影响”日本土木工程师学会年度学术会议摘要 970-971（1993）。

TADAYASU,UEHARA: "Field studies on effect of change of configulation of tidal flat on explosure area of tidal flat in Gamo Lagoon." Proceeding of 48th annual conference of JSCE. Vol.2. 970-971 (1993)

TADAYASU,UEHARA：“关于滩涂构造变化对嘎莫泻湖滩涂暴露面积影响的实地研究”。