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River2D个人笔记.doc

River

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River2D 是一个可以使用在天然河道中的二维水深平均浅水动力学模型和鱼类栖息地模型。它是基于Petrov-Galerkin 迎风守恒格式和用有限元法离散的数值模拟

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River2D

Two-Dimensional Depth Averaged Model of River

Hydrodynamics and Fish Habitat

River2D Tutorial – The Basics

J. Blackburn and P. M. Steffler

University of Alberta

September, 2002

1.0 Introduction

This tutorial is provided for you to learn the basics of River2D, the

two-dimensional depth averaged model of river hydrodynamics

and fish habitat. This tutorial is one in a series. Once you’ve

completed this tutorial, you may consider trying one or more of the

other tutorials. These tutorial cover the following topics:



Fish Habitat Analyses

River Ice Modelling

Transient Flow Modelling

Boundary Extraction and Mesh Merging

All of these tutorials can be obtained from the River2D website.

The address for the website is

www.river2d.ca

In this particular tutorial, you will learn how to use River2D to

obtain a steady state hydrodynamic solution. This will be

accomplished using topographic data obtained along the

Kananaskis River near Fortress Mountain in Alberta.

Along the way, you will also learn how to perform the following:



Set or change the boundary conditions for the problem at hand

Use River2D to obtain a steady state hydrodynamic solution

Use various available display options for viewing and

presenting model information

Make changes to the computational mesh in order to improve

the hydrodynamic solution

Extract cross sectional data from the 2D topography

The files for this tutorial should be found in the same folder in

which you found this file: “R2D_theBasics”. The complete path to

this folder will vary, depending on where you put this folder after

unzipping R2D_theBasics.zip.

River2D Tutorial – The Basic – September 30, 2002

It is recommended that you make a hardcopy of this tutorial so that

you may maximize the River2D window on your computer screen

as you follow along. However, River2D displays many things in

colour so you may want refer to the electronic version of this

tutorial if your hardcopy is black and white.

If you have comments or questions regarding this tutorial, please

feel free to contact us.

Julia Blackburn

Peter Steffler

Email: jblackburn@civil.ualberta.ca

Email:pmsteffler@civil.ualberta.ca

2.0 The River2D environment

The River2D program is one of a suite of four programs which also

一个大致的建模步骤：生成

一个包含研究数据的地形文

件，文件是以.bed为扩展

名。然后用R2D-BED对数据

进行编辑。在R2D-MESH中编

辑生成的.bed文件，进行计

算离散，也叫做网格划分。

一旦网格生成和研究边界条

件设定好，用于river2D的文

件就可以生成。

includes R2D_Bed, R2D_Mesh and R2D_Ice. The general

modeling procedure is to develop a bed topography file (a text file

with a .bed file name extension) from surveyed field data, and then

edit and refine the data using R2D_Bed. The resulting .bed file is

then used in R2D_Mesh to develop a computational discretization,

also called a mesh. Once the mesh is built and the boundary

conditions for the problem are set (no flow vertical walls, inflow

discharge, and outflow water surface elevation), an input file for

River2D can be created. Input files for River2D have the file

extension .cdg. Use of R2D_Ice is only required when modelling

flow under an ice cover. In this case, an ice topography file (a text

file with a .ice file name extension) would be developed using

R2D_Ice and then loaded into River2D once the .cdg file for the

domain has been opened.

To get started, we will launch River2D and open the .cdg file for

the Fortress site.

River2D Tutorial – The Basic – September 30, 2002

1 Launch River2D.

1、启动River2D

2、选择File > Open

and navigate。

3、选择需要的文

件，载入文件

Choose File > Open and navigate to the R2D_theBasics folder.

Select the .cdg file for this the Fortress site. It is named

fort.cdg. Note: it may take a while for this file to load

depending on the speed of your computer.

At this point, you should see the following in your River2D

window.

Before getting into the details of what is being displayed in the

River2D viewing window, we shall go over the different

components of the River2D screen. The first item is the Menu Bar

River2D Tutorial – The Basic – September 30, 2002

which has many of the standard windows operations and additional

operations that are specific to River2D.

Some of the commands in the menu bar are reproduced in the

Toolbar.

The River2D screen also has a Title Bar which displays the

currently opened file, in this case, fort.cdg.

The last screen item is the status bar, located at the bottom of the

River2D screen.

Once a .cdg file has been loaded, the status bar displays the x and y

coordinates of the position of the mouse pointer. In addition to the

x and y coordinates, one other parameter is given in the status bar.

This parameter is the same as that selected using the

River2D Tutorial – The Basic – September 30, 2002

剩余40页未读，继续阅读

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这个错误是因为你在一个不支持修改操作的列表上调用了 `remove()` 方法，例如使用 `Arrays.asList()` 创建的固定长度...另外，你也可以检查一下 `crossRiver()` 方法的实现，看看是否有其他地方可能会修改这个列表。

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好的，我可以回答这个问题。...river.PrintInf() ``` 输出结果分别为： ``` Line Name: Highway 1 Start Point: (0, 0) End Point: (100, 0) Line Name: Yangtze River Start Point: (0, 0) End Point: (0, 100) ```

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