A Prediction Method of River Base Flow
A prediction method and technology of base flow, applied in instrumentation, design optimization/simulation, calculation, etc., can solve problems such as affecting the prediction accuracy of base flow, large differences in underground water storage, and inability to reasonably simulate the dynamic characteristics of base flow in dry years. , to achieve good application prospects, improve accuracy, and expand the scope of applications
Active Publication Date: 2019-12-27
NANJING HYDRAULIC RES INST
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Problems solved by technology
However, for a given watershed, the groundwater storage in different wet and dry years varies greatly. This method has obvious defects in simulating the base flow in different wet and dry years, especially the base flow in dry years cannot be reasonably simulated. flow characteristics
Another disadvantage is that this method cannot reproduce the hysteresis that generally exists in the process of increasing and decreasing underground water storage in the basin, that is, the difference in the process of base flow rising and falling, which also affects the accuracy of base flow prediction
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[0029] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The implementations are only some of the implementations of the present application, not all of them. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.
[0030] The implementation mode of this application provides a method for predicting the base flow of a river, please refer to figure 1 , the method includes the following steps.
[0031] Step S1: Obtain a preset amount of runoff data during the receding process from the measured runoff data at the outlet ...
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The invention relates to a prediction method for basic flow of a river. The method comprises the steps of obtaining a preset quantity of pieces of recession process runoff data from runoff actual measurement data at the outlet section of a basin; extracting minimum runoff volume in each piece of recession process runoff data, and establishing a relational function of the minimum runoff volume and recession early-stage runoff volume; standardizing each piece of recession process runoff data based on the minimum runoff volume; determining a standardized relational function of underground water storage capacity and basic flow according to the standardized runoff data; and predicting the basic flow of the river through the standardized relational function of the underground water storage capacity and the basic flow. According to the prediction method for the basic flow of the river, the precision of predicting the basic flow can be improved.
Description
technical field [0001] The present application relates to the technical field of river runoff forecasting, in particular to a method for predicting river base flow. Background technique [0002] River runoff consists of two parts: surface runoff and underground runoff. Among them, underground runoff mainly comes from the discharge of underground water storage in the watershed, which constitutes the base flow of the river. Whether in the dry season when precipitation is lacking or in the rainy season when the watershed continues to recede after the precipitation stops, base flow is the main component of river runoff. The base flow is the core element to maintain the health and stability of the river water ecosystem. The simulation and forecast of the river base flow is of great significance to ensure the ecological flow, maintain the self-purification function of the river, and promote the improvement of water quality. The existing baseflow forecasting techniques are mainly...
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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 李伟龙玉桥林锦吴春勇崔婷婷王锐盖永伟崔江涛
Owner NANJING HYDRAULIC RES INST