Dynamic forecast control method and system for urban river flood control and drainage

Abstract

The invention discloses an urban river surge flood control and drainage dynamic forecasting control method. The method comprises the following steps that firstly, real-time rainfall data in a drainage basin is collected; secondly, the real-time rainfall data is transmitted and received through GPRS communication; thirdly, an underlying surface type is determined according to a satellite image, and CN values of all areas are obtained through checking according to the underlying surface type and a CN experience value table; fourthly, the volume of a flood is calculated based on a drainage basin rainfall-runoff model; fifthly, a water surface profile and the drainage volume of a pump station are calculated and forecast based on a river surge one-dimensional water flow mathematic model for coupling water gate overflowing and drainage of the pump station; sixthly, the volume of river surge flood propagation and drainage hydrological parameters are forecast in real time. By means of the urban river surge flood control and drainage dynamic forecasting control method and system, the river surge flood control and drainage situation can be effectively, accurately and dynamically forecast in real time, and urban river surge management and design can be easier.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, and in particular relates to a dynamic forecast control method and system for flood control and drainage, in particular to a dynamic forecast control method and system for urban river flood control and drainage. Background technique [0002] For a long time, the real-time forecasting of river flood control and drainage water surface line and outlet flow has been a key and difficult issue in the design and management of river regulation. However, the existing traditional forecast calculation methods often have the following problems: First, the traditional design flood calculation generally uses the reasoning formula method and the comprehensive unit line method. These two methods are conventional methods for calculating design floods and are widely used. For natural rivers, and for urban rivers, due to the large difference between the underlying surface of urbanization and the natural...

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Problems solved by technology

However, the existing traditional forecast calculation methods often have the following problems: First, the traditional design flood calculation generally uses the reasoning formula method and the comprehensive unit line method. These two methods are conventional methods for calculating design floods and are widely used. For natural rivers, and for urban rivers, due to the large difference between the underlying surface of urbanization and the natural landform, the process of rainstorm production and confluence is complicated, and traditional methods are often inaccurate in forecasting; secondly, traditional design flood calculations often separate flood control and drainage calculations In the calculation of waterlogging, only the surge capacity of the river is considered, and the change of the inflow flood level of the inland river and the dynamic combination of the waterlogging process are ignored.

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