Investigation on the performance of geobag revetments in rivers

土工织物填砂袋（简称土工袋）常用于江河海岸工程的防冲防洪。它们具有价格竞争力，环境友好，并且与一些传统材料相比，长期稳定性更高。以前的研究主要集中在他们的应用在海岸 ** 工程，而在河流的背景下，有一个知识缺口。拟议的项目是阿尔伯塔大学和西北水利咨询有限公司（NHC）之间的研究合作的第一阶段，旨在提高我们对地质袋和水流如何相互作用的理解。NHC是水资源工程领域领先的咨询公司之一。近二十年来，该公司一直致力于孟加拉国大型土工袋河流护岸的设计和施工。人们注意到 **，使用现有的公式，地质袋的尺寸过大。这项合作研究将制定一个更好的公式，考虑到袋表面水流施加的水力负荷，确定土工袋的尺寸。采用这种解决方案将大大降低建设成本和洪水破坏的风险。这项合作的 ** 成果将大大增加使用地质袋作为保护 ** 侵蚀河岸的主要方式的可能性，从而在加拿大各地实现更可持续的侵蚀控制。研究项目的第一阶段将利用数值模型结合实验室实验 ** 来开发改进的施胶配方。该公司将进行实验，并提供数据 ** 用于校准和验证数值模型。然后，将使用经验证的模型来分析施加在土工袋表面上的 ** 水力载荷，并制定尺寸公式。在研究的第二阶段，将进行数值模拟和平行的实地观察，以评估 ** 实验室实验在实地情况下的有效性。实地观察将由伙伴公司牵头，在孟加拉国布拉马普特拉河上选定的 ** 地点进行。这项研究的结果将提高我们对土工袋护岸在河流中的性能的理解。

Geotextile sand filled bags (geobags) are often used for erosion protection and flood control in river and coastal**engineering. They are price competitive, environment-friendly, and can be more stable in the long term as**compared to some conventional materials. Previous research mostly focused on their application in coastal**engineering whereas there is a knowledge gap in the river context. The proposed project is the first phase of a**research collaboration between the University of Alberta and Northwest Hydraulic Consultants Ltd. (NHC) that**aims to enhance our understanding of how geobags and the water flows interact. NHC is one of the leading**consulting companies in water resources engineering. The company has been working on the design and**construction of large-scale geobag river revetments in Bangladesh for almost two decades. It has been noticed**that the geobags are being oversized using the existing formulas. This collaborative research will develop a**better formula for sizing the geobags taking into account the hydraulic loads exerted by water flows at the bag**surface. Adopting this solution will significantly reduce the construction cost and risk of flood damage. The**outputs from this collaboration will greatly increase the possibility of using geobags as a primary way to protect**eroding riverbanks, leading to more sustainable erosion control across Canada.**The first phase of the research project will utilize numerical model in conjunction with laboratory experiments**to develop an improved sizing formula. The company will be conducting the experiments and providing data**for calibrating and validating the numerical model. The validated model will then be used to analyze the**hydraulic loads exerted on the geobag surface and develop the sizing formula. In the second phase of the**research, numerical modelling and parallel field observations will be conducted to assess the effectiveness of**laboratory experiments in field situations. Field observations will be led by the partner company at selected**sites on the Brahmaputra River, Bangladesh. Findings from this research will enhance our understanding of the**performance of geobag revetments in rivers.