泥石流沟道汇流对堆积危险范围影响的数值模拟研究

doi:10.13249/j.cnki.sgs.2016.10.017

地理科学 ›› 2016, Vol. 36 ›› Issue (10): 1588-1594.doi: 10.13249/j.cnki.sgs.2016.10.017

泥石流沟道汇流对堆积危险范围影响的数值模拟研究

叶健¹(), 陈锦雄², 陈晓清³, 朱军¹, 徐柱¹

1.西南交通大学地球科学与环境工程学院,四川成都 611756
2.乔治梅森大学计算机科学系,美国弗吉尼亚 22030-4444
3.中国科学院成都山地灾害与环境研究所,四川成都 610041

收稿日期:2015-12-25 修回日期:2016-02-22 出版日期:2016-10-20 发布日期:2020-09-07
作者简介:
作者简介：叶健（1980-）,男,安徽六安人,讲师,主要从事山地灾害三维仿真研究方面的工作。E-mail：yejian518@home.swjtu.edu.cn
基金资助:
青年教师百人计划项目（A0920502051411-7）、中央高校基本科研业务费专项资金资助(A0920502051619-91)、四川省应急测绘与防灾减灾工程中心技术研究中心开放基金重点项目(J2014ZC17)、教育部创新团队（IRT13092）项目资助

Numerical Simulation Study on Hazardous Area for the Confluence Deposit of Gully Debris Flow

Ye Jian¹(), Chen Jinxiong², Chen Xiaoqing³, Zhu Jun¹, Xu Zhu¹

1. Faculty of Geoscience and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, Sichuan, China
2. George Mason University, Fairfax 22030-4444, USA
3. Institution of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China

Received:2015-12-25 Revised:2016-02-22 Online:2016-10-20 Published:2020-09-07

摘要/Abstract

摘要：

利用离散元法和图形处理器（GPU）并行计算手段建立泥石流运动堆积模型,以自然界沟道泥石流汇流后运动堆积特征及危险范围作为模拟参照,利用所构建的泥石流流通槽完成沟道泥石流不同交汇角汇流模拟试验和堆积危险范围预测,实现了泥石流沟道汇流的可视化模拟和数值模拟。试验结果表明,可视化模拟能够模拟出自然界中泥石流自流通区运动汇流后产生堆积的运动特征;数值模拟实现了锐角条件下仅考虑单因素即沟道交汇角对泥石流堆积危险范围影响的模拟试验。此外,利用GPU并行计算的优势可用于模拟大规模泥石流汇流现象,模型的可扩展性为泥石流汇流堆积危险范围分析向更为复杂的地理环境模拟奠定基础。

关键词: 泥石流汇流, GPU, 泥石流堆积, 危险范围, 离散元法

Abstract:

Featured with suddenness and rapid expansion, the confluence of gully debris flow in the nature can cause huge economic loss to the residents along the accumulation areas. Therefore, it is necessary and urgent to predict the hazardous range for the confluence of gully debris flow. Through utilizing discrete element method and GPU parallel computing approaches, this paper establishes debris-flow deposit model. By taking the debris-flow deposit characteristics after the confluence of gully debris flow in the nature and simplifying the interaction between debris-flow gully, this article completes numerical simulation of debris-flow confluence with different confluent angles and the prediction of deposit hazardous areas. The experiment results indicate that numerical simulation of debris-flow confluence can not only simulate the characteristics of deposit produced by the confluence from circulation areas of debris flow in the nature, but also simulate the reasonable hazardous range for the debris-flow deposit under the action of pressure component and shear force component of different gully confluence angles. In addition, the advantages of GPU parallel computing can be used to simulate the large-scale debris flow confluence phenomena, and the expandability of this model lays simulation basis for analyzing the hazardous range for the confluence accumulation of debris flow in a more complicated geographical environment.

Key words: debris-flow confluence, GPU, debris-flow deposits, hazard range, DEM

中图分类号:

P694

叶健, 陈锦雄, 陈晓清, 朱军, 徐柱. 泥石流沟道汇流对堆积危险范围影响的数值模拟研究[J]. 地理科学, 2016, 36(10): 1588-1594.

Ye Jian, Chen Jinxiong, Chen Xiaoqing, Zhu Jun, Xu Zhu. Numerical Simulation Study on Hazardous Area for the Confluence Deposit of Gully Debris Flow[J]. SCIENTIA GEOGRAPHICA SINICA, 2016, 36(10): 1588-1594.

图/表 6

图1

图2

图3

图4

表1

泥石流沟道汇流数值模拟试验主要参数与结果"

编号	坡度 $β A$	流量 $Q A$	交汇角α	坡度角 $β B$	流量 $Q B$	最大汇流堆积长度L	最大汇流堆积宽度度B
1	30°	125000	20°	30°	125000	270	450
2	30°	125000	30°	30°	125000	270	445
3	30°	125000	40°	30°	125000	270	440
4	30°	125000	50°	30°	125000	270	433
5	30°	125000	60°	30°	125000	270	425
6	30°	125000	70°	30°	125000	270	420
7	30°	125000	80°	30°	125000	267.5	412.5

表1

图5

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泥石流沟道汇流对堆积危险范围影响的数值模拟研究

Numerical Simulation Study on Hazardous Area for the Confluence Deposit of Gully Debris Flow

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