地球信息科学学报 ›› 2015, Vol. 17 ›› Issue (5): 506-514.doi: 10.3724/SP.J.1047.2015.00506

• 本期要文(可全文下载) • 上一篇    下一篇

论地理规律对流域过程模拟并行计算的指导作用

刘军志1,2, 朱阿兴1,2,3, 秦承志4, 江净超4,5, 朱良君4,5, 沈琳1,2   

  1. 1. 南京师范大学虚拟地理环境教育部重点实验室, 南京210023;
    2. 江苏省地理信息资源开发与利用协同创新中心, 南京210023;
    3. Department of Geography, University of Wisconsin-Madison, Madison, WI 53706, USA;
    4. 中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室, 北京100101;
    5. 中国科学院大学, 北京100049
  • 收稿日期:2014-12-26 修回日期:2015-02-02 出版日期:2015-05-10 发布日期:2015-05-10
  • 通讯作者: 朱阿兴(1962-),男,浙江长兴人,博士,教授,研究方向为GIS/RS及流域系统科学。E-mail:axing@njnu.edu.cn E-mail:axing@njnu.edu.cn
  • 作者简介:刘军志(1984-),男,山东海阳人,博士,讲师,研究方向为流域过程模拟及其并行计算。E-mail:liujunzhi@njnu.edu.cn
  • 基金资助:

    水体污染控制与治理科技重大专项(2013ZX07103006-005);国家科技支撑计划项目(2013BAC08B03-4);江苏省高校自然科学研究项目(14KJB170009、13KJB170008);江苏高校优势学科建设工程项目。

Parallel Computing of Watershed Process Simulation Guided by Geographical Laws

LIU Junzhi1,2, ZHU Axing1,2,3, QIN Chengzhi4, JIANG Jingchao4,5, ZHU Liangjun4,5, SHEN Lin1,2   

  1. 1. Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Nanjing 210023, China;
    2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China;
    3. Department of Geography, University of Wisconsin-Madison, Madison WI 53706, USA;
    4. State Key Lab of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    5. University of Chinese Academy of Sciences, CAS, Beijing 100049, China
  • Received:2014-12-26 Revised:2015-02-02 Online:2015-05-10 Published:2015-05-10

摘要:

流域过程模拟是地理学研究和流域科学管理的有效工具。在应用需求的推动下,长时段、高空间分辨率的多过程综合模拟逐渐兴起,流域过程模拟所需的计算量越来越大,亟需借助并行计算技术来提高效率。流域过程模拟并行计算的现有研究,大多为针对特定模型的个例研究,缺乏对指导各类流域过程模型并行计算的共性思路和原则进行讨论和梳理。首先,对可指导流域过程模拟并行计算的地理规律进行了分析,从空间、子过程和时间3 个角度,探讨了空间等级层次结构、空间相互作用、子过程间依赖关系、时空动态变化等地理规律,对流域过程模拟并行计算的指导作用;然后,根据地理规律在并行计算中所发挥作用和适用范围的不同对其分类;最后,结合2 个实例,对地理规律的流域过程模拟并行计算进行了分析和验证,旨在对流域过程模拟并行计算理论和方法的发展与应用提供借鉴。

关键词: 指导作用, 流域过程模拟, 并行计算, 地理规律

Abstract:

Watershed process simulation has become an important tool for geographical researches and decision making of watershed management. For watershed process simulation with long period, high spatial resolution and multi-process integrated modeling, the amount of required computation is so huge that the parallel computing is urgently needed to handle these simulations. Currently, the rapid development of hardware and software in parallel computing provides a good opportunity for solving the computation bottleneck of multi- process and high-resolution watershed process simulation over large regions. In order to take full advantage of the capabilities of new parallel-computing hardware, it is necessary to use geographical laws, which illustrate the characteristics of watershed processes, to guide the design and implementation of parallel computing algorithms. This paper presents that geographical laws can be used to guide the design and implementation of parallel computing algorithms for watershed process simulation from different aspects (i.e. spatial, sub-process, and temporal aspects). The laws that can be used include the spatial hierarchy structure, the interactions among spatial units, the dependences among geographical process, and the spatial-temporal dynamic of geographical processes, etc. At the end of this paper, two parallel computing cases of watershed process simulations guided by geographical laws are illustrated to show how these geographical laws can be used in real-world applications. This paper intends to provide a theoretical and methodology guidance for parallel computing of watershed process simulation and other similar types of geo-computation.

Key words: watershed process simulation, parallel computing, geographical laws, guidance