Reducing flood hazard by effective polder operation: A case study of the Golina polder

IF 0.8 Q4 WATER RESOURCES
Albert Malinger, Małgorzata Wawrzyniak, Maksymilian Rybacki, T. Dysarz, Ewelina Szałkiewicz
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引用次数: 2

Abstract

The aim of the study was to determine an effective variant of operation of the Golina polder to reduce flood hazard in the Warta River valley. We implemented a trial-and-error method for the development of computational variants. Our approach was based on staged analyses of alternatives, which took into account different locations and parameters of the inlet and outlet-controlling structures. Various control scenarios for flooding and draining the polder were also considered. A hybrid hydrodynamic model consisting of a 1D part for the main river area and a 2D part for the polder area was used for calculations. The model was built based on a digital elevation model (1 m resolution) and channel sections of the Warta River. The calibration was based on data collected during the flood in 2010 from the water gauge Sławsk (located directl y at the Warta River) and water surface elevation measurements carried out in the polder area. Alternatives in subsequent stages were determined based on the results of previous stages, as well as experiences from the 2010 flood and consultations with the Regional Water Management Board in Poznań. The performance of the alternatives was evaluated according to six criteria that described the effectiveness of the polder operation in terms of its practical use and effectiveness in reducing flood hazard. The results showed that our approach made it possible to identify an effective variant of polder operation. Additional calculations were also performed to determine the magnitude of flows for which flooding of the polder should be considered to reduce downstream flooding.
通过有效的圩田作业减少洪水危害:以戈利纳圩田为例
这项研究的目的是确定一种有效的戈利纳圩田作业方式,以减少瓦尔塔河流域的洪水灾害。我们为计算变体的开发实现了一种试错方法。我们的方法是基于对备选方案的分阶段分析,考虑到入口和出口控制结构的不同位置和参数。还考虑了各种控制圩田的洪水和排水方案。采用主河区一维部分和圩区二维部分的混合水动力模型进行计算。该模型是基于1米分辨率的数字高程模型和瓦尔塔河的河道断面建立的。校准基于2010年洪水期间从水位计Sławsk(直接位于瓦尔塔河)收集的数据和在圩区进行的水面高程测量。后续阶段的替代方案是根据前几个阶段的结果,以及2010年洪水的经验和与波兹纳瓦地区水资源管理委员会的磋商确定的。根据六个标准对备选方案的性能进行评估,这些标准描述了圩田作业在实际使用和减少洪水危害方面的有效性。结果表明,我们的方法使识别圩田作业的有效变体成为可能。还进行了额外的计算,以确定流量的大小,其中应考虑圩田的洪水,以减少下游的洪水。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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