Wide and slow river form modeling method and system based on spline function

Abstract

The invention discloses a wide and slow river form modeling method and system based on a spline function. The method includes the following steps: generating a plurality of river central line nodes and connecting the plurality of river central line nodes to form a river central line; determining a river profile form of each river central line node; taking the river central line nodes as referencepoints to establish a coordinate system, and determining coordinates of two ends of the upper side of each river profile and coordinates of two ends of the lower side of each river profile on the basis of the depth of a river, the width of the top of the river and the width of the bottom of the river; obtaining curve equations of the river profiles through a spline interpolation method; and makingthe river profiles of the plurality of river central line nodes accumulate in a three-dimensional coordinate system in the main direction of the river to form a three-dimensional river model. The beneficial effects are as follows: the established river profile forms tend to be wide and slow U-shaped forms, which are suitable for modeling of a braided wide and slow river; and with the wide and slow river forms, multiple channel bar deposits and falling layers can be conveniently placed and relations among channel bars can be conveniently described.

Description

technical field [0001] The invention relates to the technical field of reservoir description, in particular to a method and system for modeling the shape of gentle and gentle channels based on spline functions. Background technique [0002] Traditional target-based channel modeling methods (such as Fluvsim) are often used to simulate meandering rivers with flat tops, flat bottoms, and concave channels. The profile of the channel decreases from the deepest to both sides. The river channel has a large width-to-thickness ratio, and there is a wide flat area at the bottom, and there are other types of sedimentary bodies such as channel banks and cascading layers inside the channel. At this time, methods such as Fluvsim cannot describe these phenomena. However, there is no specific modeling method for this kind of channel shape at present, so it is urgent to study a new channel modeling method to solve the problem of insufficient channel shape description when the current target-...

AI Technical Summary

Problems solved by technology

[0002] Traditional target-based channel modeling methods (such as Fluvsim) are often used to simulate meandering rivers with flat tops, flat bottoms, and concave channels. The profile of the channel decreases from the deepest to both sides. The width-thickness ratio of the river channel is large, there is a wide gentle area at the bottom, and there are other types of sedimentary bodies such as channel banks and falling layers inside the channel. At this time, methods such as Fluvsim cannot describe these phenomena

However, there is no specific modeling method for this kind of channel shape at present, so it is urgent to study a new channel modeling method to solve the problem of insufficient channel shape description when the current target-based channel modeling method is applied to braided river modeling

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