﻿ 应用Infoworks RS模拟溃堤洪水 Application of InfoWorks RS to Simulate Dike-Break Floods

Journal of Water Resources Research
Vol.06 No.05(2017), Article ID:21925,9 pages
10.12677/JWRR.2017.65052

Application of InfoWorks RS to Simulate Dike-Break Floods

Yalin Li1, Xiaoxiao Wang2

Jiangxi Provincial Water Conservancy Research Institute, Nanchang Jiangxi

Received: Aug. 12th, 2017; accepted: Aug. 24th, 2017; published: Sep. 5th, 2017

ABSTRACT

The dike-break flood has the characteristics of short duration, fast speed and large flow rate, which will cause great influence on the safety of the people’s property in the protected area. Based on the theory of hydraulics, hydrology and risk analysis, this paper uses the technical methods such as numerical calculation and mathematical statistics to simulate the dike-break flood under design and over-standard flood in the Ganjiang River. InfoWorks RS is employed to simulate the protection area of Fengcheng Dikes in Jiangxi Province. The flood routing and factors, such as inundated depth and area, are analyzed under different simulation cases. The results provide the scientific basis for flood prevention and mitigation, disaster assessment, flood transfer and protection of the people’s property.

Keywords:InforWorks RS, Dike-Break Flood, Simulation, Flood Risk

Copyright © 2017 by authors and Hans Publishers Inc.

1. 引言

2. 模型简介

InfoWorks RS是英国Wallingford公司开发的水力学模型专业应用软件，主要用于河网水动力学模型建模和计算，能够模拟流域降雨径流、明渠、滞洪区、堤坝和复杂的水工结构(水闸、桥、泵、堰等)并提供决策支持和先进的图形分析表现功能 [3] [4] 。

1) 河道一维模型：一维河道(河网)的洪水运动用St.Vennant方程组描述，包括质量方程与动量方程。其上、下游边界的控制条件一般采用水位过程控制、流量过程控制、流量~水位关系控制等形式 [2] 。由基本方程St.Vennant方程、边界条件和初始条件同组成一维洪水运动的定解问题。

(1)

(2)

2) 洪泛区二维模型：如河槽内水流具有一维性，河槽外水流具有二维性，决口处水流则具有三维性质。一般情况下，洪水是在两岸设有堤防的河道内运动，一维St.Vennant方程组可以解决河道过流能力和水位升降的变化，而洪水到达时间、洪水淹没范围、淹没水深、淹没历时等，需要做二维洪水模拟计算，采用守恒型式的浅水波方程作为二维洪水运动的控制方程 [5] 。

(3)

(4)

(5)

3) 耦合模型

3. 洪水模拟分析思路

4. 应用案例

4.1. 研究区域概况

4.2. 模型构建

4.2.1. 洪源分析

4.2.2. 网络

4.2.3. 事件

Figure 1. Frame of flood simulation analysis

4.2.4. 逻辑控制

4.2.5. 参数率定

4.3. 结果分析

Figure 2. Comparison of measured and simulated water levels of Shicha station

Table 1. List of roughness coefficients used in the simulation

Figure 3. Comparison of measured and simulated water levels of Fengcheng station

Figure 4. Flood routing of dike bursts for 50-and 100-year floods

Table 2. Inundated depth and corresponding inundated area in Jiandong Village village under two cases

Figure 5. Inundated area of the dike burst caused by a 50-year flood in Ganjiang

Figure 6. Inundated area of the dike burst caused by a 100-year flood in Ganjiang

Figure 7. Flow process of the burst under case 1

5. 结语

Figure 8. Flow process of the burst under case 2

Application of InfoWorks RS to Simulate Dike-Break Floods[J]. 水资源研究, 2017, 06(05): 443-451. http://dx.doi.org/10.12677/JWRR.2017.65052

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