Spatiotemporal variation of sedimentation in an agricultural drainage canal with eco-friendly physical structures: a case study
Spatiotemporal variation of sedimentation in an agricultural drainage canal with eco-friendly physical structures: a case study
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具有生态友好型物理结构的农业排水渠道沉积物时空变化：案例研究
DOI：
10.1007/s10333-020-00831-6
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发表时间：
2021
影响因子：
2.2
通讯作者：
H.
中科院分区：
文献类型：
--
作者：
Maeda;S.;Takagi;S.;Yoshida;K. and Kuroda;H.
在农业运河中引入的生态友好型物理结构中沉积物过多，有时会损害这些结构作为鱼类栖息地的功能。本研究报告的空间和时间的变化，床高程在一个运河段，一组六个鱼巢和一个鱼池安装。现场观测和数值模拟使用的二维水动力模型，Nays 2DH，进行描述的情况下，泥沙淤积和冲刷发生在结构。2016-2019年期间，在该地区的19个横截面上对运河段的河床地形进行了12次调查。对测量的河床高程进行插值，以估计其时空变化、沉积时间和沉积物体积的变化。研究结果表明，沉积和冲刷在鱼巢中以1年为周期发生。整个研究区的沉积物积累量低于预期。这些结果可以为设计鱼池和鱼巢提供见解，这些鱼池和鱼巢需要在受周围稻田土壤运输影响的生态友好型运河中进行较少的维护。
Excessive sediment deposition in eco-friendly physical structures introduced in agricultural canals sometimes damages the function of these structures as fish habitats. This study reports the spatial and temporal changes in bed elevation in a canal section where a set of six fish nests and one fish pool were installed. Field observations and numerical simulation using the two-dimensional hydrodynamic model, Nays2DH, were conducted to describe the circumstances in which sediment deposition and scouring occur in the structures. The bed topography of the canal section was surveyed 12 times during 2016–2019, at 19 transverse cross sections of the area. The measured bed elevation was interpolated to estimate its spatiotemporal variation, sedimentation timing, and change in sediment volume. The results of this work clarified that deposition and scouring occurred in a 1-year cycle in the fish nests. The accumulation of sediment in the whole study area was found to be lower than expected. These results could provide insight for designing fish pools and fish nests that require less maintenance in an eco-friendly canal influenced by soil transport from surrounding paddy fields.
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DOI：
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发表时间：
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期刊：
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DOI：
10.2208/prohe.42.1057
发表时间：
1998
期刊：
Doboku Gakkai Ronbunshuu B
影响因子：
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作者：
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