Evaluation of total sediments movement on the Abukuma River and the Sendai Bay Coast

阿武隈川和仙台湾沿岸总泥沙运动评价

• 批准号: 11650520
• 负责人: SAWAMOTO Masaki
• 金额: $ 2.18万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650520/
• 关键词: Sediment Movement; Abukuma River; Sendai Bay Coast; Sediment Balance; River Mouth Process; 総合土砂収支; 漂砂; 海岸侵食; 海岸浸食

1. Reexamining the results of field survey on the Abukuma River mouth morphology conducted by ourselves since 1984, sediment movement and sediment balance were studied from various time scale of view. It was shown that the estury have a function as a pocket for sediment and the time scale of sediment movement are controled by the ratio of this volume and the sediment flux by the external forces.2. A water runoff and sediment discharge of thle Abukuma River was modeled from the upper reach to the river mouth and the sediment supply from the river to the Sendai Bay Coast was reasonably evaluated.3. Morphology changes, sendiment characteristics and waves along the Sendai Bay Coast and the Fukushima Coast were examined and the sediment balance of the Sendai Bay Coast was evaluated quantatively.4. Combining the above results, the total sediment movement was evaluated both along the Abukuma River and the Sendai Bay Coast. It was pointed out that the Sendai Bay Coast was changed its state from dynamic equilibrium to the unequilibrium state because of lack of sediment supply and the obstraction of sand drift along the coast.5. The engineering measures were considered for the unequilibrium state of sediment along the Sendai Bay Coast.

1. 对1984年以来笔者自行进行的阿布库马河河口形态野外调查结果进行了回顾，从不同的时间尺度对泥沙运动和泥沙平衡进行了研究。结果表明，河口具有沙袋的功能，泥沙运动的时间尺度受其体积与受外力作用的沙通量之比的控制。2 .模拟了阿布库马河上游至河口的径流量和输沙量，合理评价了阿布库马河向仙台湾沿岸的输沙量。研究了仙台湾沿岸和福岛沿岸的形态变化、泥沙特征和波浪，定量评价了仙台湾沿岸的泥沙平衡。结合上述结果，对Abukuma河沿岸和仙台湾沿岸的总泥沙运动进行了评价。指出仙台湾海岸由动力平衡状态向不平衡状态转变的主要原因是泥沙供给不足和沿岸沙流的阻碍。针对仙台湾沿岸泥沙的不平衡状态，提出了相应的工程措施。

项目成果

Tsuyoshi Kotoura: "Quasi-three dimensional flood runoff model on surface and subsurface flows"Annual Journal of Hydraulic Engineering. 121-126 (2001)

Tsuyoshi Kotoura：“地表和地下流的准三维洪水径流模型”水利工程学年刊。

Totok Sprijo: "A dynamic model on the river mouth change"IAHR Symp. River, Coastal & Esturine Morphodynamics. Vol. 2. 433-442 (2001)

Totok Sprijo：“河口变化的动态模型”IAHR Symp。

Totok Suprijo: "A dynamic Model on the river mouth change"IAHR Symp.River, Coastal & Esturine Morphodynamics. 2. 433-442 (2001)

Totok Suprijo：“河口变化的动态模型”IAHR Symp.River，沿海

Akira Mano: "The August 1998 flood disaster in the Abukuma River basin"Journal of Natural Disaster Science. 22. 1-11 (2000)

马野彰：《1998年8月阿武隈河流域洪涝灾害》自然灾害科学杂志。

Masaki Sawamoto and Akira Mano: "Lecture Notes of the 37th Summer Seminar on Hydraulic Engineering, 2001 Course B"Coastal Engineering Committee &. Committee on Hydraulics. 130 (2001)

泽本正树、真野彰：《第37届水利工程夏季研讨会讲义，2001年B课》海岸工程委员会