KR-20260066466-A - APPARATUS FOR HYDRAULIC HYDROLOGY ANALYSIS BASED ON UNSHAPED GRID AND METHOD THEREFOR

KR20260066466AKR 20260066466 AKR20260066466 AKR 20260066466AKR-20260066466-A

Abstract

The present invention relates to a hydrological analysis device and method using an irregular grid-based distributed hydrological model, wherein the method may include: a step of dividing a target basin, which is a target to which the grid-based distributed hydrological model is applied and which has topographic information, into a plurality of grids of a predetermined size; a step of setting the plurality of grids into a plurality of initial grids, which are a set of initial river grids and a set of initial river adjacent grids, and, according to a predetermined grid analysis policy, labeling a first grid among the plurality of initial grids as one of grid labels having a river grid and a river adjacent grid; and a step of distributing at least a portion of the first non-river area of a first initial river grid, which is a river grid among the plurality of initial grids and has a first river width and length, to a first initial river adjacent grid among the plurality of initial grids adjacent to the first initial river grid according to a predetermined area distribution policy.

Inventors

김대식

Assignees

충남대학교산학협력단

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (12)

A step of dividing a target basin, which is a target to which a grid-based distributed hydrological model is applied and which possesses topographic information, into multiple grids of a predetermined size; A step of setting the plurality of grids as a plurality of initial grids, which are a set of initial river grids and a set of initial river adjacent grids, and, according to a preset grid interpretation policy, labeling a first grid among the plurality of initial grids as one of grid labels having a river grid that is interpreted as a grid having a river width and a river length, and a river adjacent grid that is interpreted as a grid without a river and whose adjacent grid is said to be the river grid; and A step comprising: distributing at least a portion of the first non-river area of a first initial river grid, which is a river grid among the plurality of initial grids and has a first river width and length, to a first initial river adjacent grid among the plurality of initial grids adjacent to the first initial river grid according to a preset area distribution policy; Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Article 1, The method further includes the step of transforming the above plurality of initial grids into a plurality of irregular grids; and The above plurality of irregular grids are, A first modified river grid in which the first initial river grid is modified into a grid composed of an area according to the first river width and length, and The first initial river adjacent grid comprises a first modified river adjacent grid that reflects an area allocated from a first river grid group that is closely adjacent to the first initial river adjacent grid among the initial river grid sets and includes at least the first initial river grid. Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Article 1, Among the first deformation grid width and length of the first deformation river adjacent grid mentioned above, The width of the first deformation grid is the same as the width of the first initial river adjacent grid, and The first deformation grid length is proportional to the length of the first initial river adjacent grid corresponding to the allocated area, Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Paragraph 3, The above area allocation policy is An equal distribution policy for distributing the above-mentioned first non-river area into a first equal division area divided by the number of grids in a first river adjacent grid group closely connected to the first initial river grid among the above-mentioned initial river adjacent grid sets; and One of the weighted distribution policy that distributes an area obtained by multiplying the first equal division area by a first weight to the first initial river adjacent grid. Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Article 1, In the case where the above-mentioned first initial river grid is applied as a river grid by the above-mentioned grid analysis policy, A first grid analysis policy in which the area according to the first river width and length based on the above topographic information is greater than or equal to the pre-set river recognition area (A1); A second grid analysis policy in which the catchment area in the corresponding grid is greater than or equal to the pre-set catchment area (A2) for river judgment; and In the case where any one of the third grid analysis policies to which both of the above first and second grid analysis policies are applied is applied, Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Article 1, A step of modifying the grid-based distributed hydrological model into an irregular grid-based distributed hydrological model by replacing the plurality of initial grids with the plurality of irregular grids; and The method further comprises the step of executing a hydrological simulation based on the aforementioned irregular grid-based distributed hydrological model, using the simulated rainfall data among the measured corresponding simulated rainfall and runoff data. Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Article 6, The method further includes the step of deriving optimal parameters by correcting some of the multiple parameters of the irregular grid-based distributed hydrological model based on the above simulation runoff data. Some of the parameters being corrected above are Roughness coefficient factor for adjusting the preset roughness coefficient of a river; A stream length factor that adjusts the pre-set stream length; A soil layer thickness factor that adjusts the average effective soil depth value obtained from a preset soil map; and A soil infiltration rate factor for adjusting the soil infiltration rate; having at least one of the following, Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Article 7, The method further comprises the step of predicting hydrological runoff at the second grid among the plurality of grids based on current rainfall data, using an optimal distributed hydrological model based on an irregular grid that has been corrected by applying the optimal parameters to the distributed hydrological model based on the irregular grid and using the corrected optimal distributed hydrological model based on an irregular grid. Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Article 6, The method further comprises the step of predicting hydrological runoff at a second grid among the plurality of grids based on current rainfall data using the above-mentioned irregular grid-based distributed hydrological model. Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Article 8 or Article 9, The method further comprises the step of calculating the water level in the second grid based on the predicted hydrological outflow amount and the second river width of the second grid. Hydrological analysis method using a distributed hydrological model based on an irregular grid.
In Article 10, The above labeling step comprises the step of labeling the first grid as a reservoir grid when the first grid has a reservoir capacity greater than or equal to a preset reservoir judgment reservoir capacity (A3). The above second grid is a reservoir grid, and The above hydrological outflow prediction step comprises a step of simulating a flood control effect based on the inflow and outflow from the reservoir grid. Hydrological analysis method using a distributed hydrological model based on an irregular grid.
A model preprocessing unit (110) that divides a target basin, which is a target applied to a grid-based distributed hydrological model and has topographic information, into multiple grids of a preset size; The above plurality of grids are set as a plurality of initial grids, which are a set of initial river grids and a set of initial river adjacency grids, and according to a preset grid analysis policy, the first grid among the plurality of initial grids, A river grid that is interpreted as a grid containing a river, equipped with river width and river length, A river adjacent grid interpreted as a grid without rivers, wherein the adjacent grid is the aforementioned river grid, and, A river setting unit (115) that labels the river grid and any one of the non-deformed grids that do not correspond to the above river grid and river adjacent grid; At least a portion of the first non-river area of the first initial river grid, which is a river grid among the plurality of initial grids and has a first river width and length, is distributed to the first initial river adjacent grid among the plurality of initial grids adjacent to the first initial river grid according to a preset area distribution policy, The above plurality of initial grids are transformed into a plurality of irregular grids, and A grid setting unit (120) that modifies the grid-based distributed hydrological model into an irregular grid-based distributed hydrological model by replacing the plurality of initial grids with the plurality of irregular grids; The above plurality of irregular grids are, A first modified river grid in which the first initial river grid is modified into a grid composed of an area according to the first river width and length, and The first initial river adjacent grid comprises a first modified river adjacent grid that reflects an area allocated from a first river grid group that is closely adjacent to the first initial river adjacent grid among the initial river grid sets and includes at least the first initial river grid. Hydrological analysis device using a distributed hydrological model based on an irregular grid.

Description

Apparatus for Hydrological Analysis Based on Unshaped Grid and Method Therefor The present invention relates to a hydrological analysis device and a method using a distributed hydrological model based on an irregular grid. Hydrological models, which are tools for analyzing the water cycle of a basin, can be classified into lumped, semi-distributed, and distributed models. Lumped models interpret a single basin as a single hydrological unit, semi-distributed models interpret small basins as a single hydrological unit, and grid-based distributed models interpret individual grids as a single hydrological unit. While centralized and semi-distributed models have limitations in that they ignore circulation processes within their respective areas, grid-based distributed models can reflect the influences of diverse land use, geology, and topography within a watershed. Therefore, distributed hydrological models capable of physically identifying various hydrological cycle processes within a watershed are suitable for integrated water management. Due to climate change, the frequency and scale of damage from floods, including super typhoons, localized torrential rains, and torrential downpours, are on the rise; therefore, an accurate and rapid hydrological forecasting system is required for flood warnings and alerts to mitigate flood damage. Compared to the currently operating regional flood forecasting systems (Han River, Nakdong River, Geum River, and Yeongsan River), the development and operation of systems for predicting rainfall-runoff and flood volume in agricultural reservoir basins are currently inadequate. Although the Korea Rural Community Corporation has attempted to develop a system by introducing various models, it is facing difficulties in actual use. In particular, there is a need for a temporal and spatial flood prediction and evaluation system for agricultural reservoir basins that integrates real-time weather forecast data—considering the frequent occurrence of localized heavy rainfall—with real-time reservoir water level measurement data using IT. A distributed rainfall-runoff model (flood prediction model) possessing both reliability and ease of use for practical application is required. Figure 1 is a block diagram showing the internal configuration of a hydrological analysis device using an irregular grid-based distributed hydrological model. Figure 2 is an internal block diagram of the control unit of Figure 1. Figure 3 illustrates the structure of a distributed hydrological model based on an irregular grid. Figure 4 illustrates a conceptual diagram of hydraulic/hydrological water flow analysis of a distributed hydrological model based on an irregular grid. Figure 5 illustrates various grid resolutions. Figure 6 illustrates a river grid with river width applied and a quad tree grid applied. Figure 7 is a flowchart of the analysis method of a hydrological analysis device using an irregular grid-based distributed hydrological model of the present invention. Figures 8 and 9 illustrate the initial lattice being transformed into an irregular lattice. Figure 10 illustrates the process in which the initial grid of the target basin of Waryong Reservoir is transformed into an irregular grid. Figure 11 illustrates the physical characteristic values of hydrological factors. Figure 12 illustrates the relationship between the correction parameter and the hydrograph. The present invention will be described in more detail below with reference to the drawings. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and/or" includes a combination of multiple related described items or any of the multiple related described items. "Or" may be interpreted as a logical exclusive combination in the context, but generally, unless there is a direct description such as "otherwise" or "logical exclusive combination," it is interpreted as having the same meaning as "and/or," that is, a logical disjunction. When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. Conversely, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Furthermore, the fact that a first component and a second component on a network are connected or connected implies that data can be exchanged between the first component and the second component via wired or wireless means. Fur