FLUCTUATION PROPERTIES OF PRECIPITATION-TOPOGRAPHY RELATIONSHIPS IN MOUNTAINOUS REGIONS

• SUZUKI Yoshiharu

  宇都宮大学工学部建設学科建設工学講座

• KAMATA Masanori

  宇都宮大学大学院工学研究科エネルギー環境科学専攻

• MIYATA Shohei

  (株) 建設技術研究所九州支社河川部

• NAKAKITA Eiichi

  京都大学大学院工学研究科都市環境工学専攻

• HASEBE Masahiko

  宇都宮大学工学部建設学科建設工学講座

• IKEBUCHI Shuichi

  京都大学防災研究所水資源研究センター

Bibliographic Information

Other Title

• 降雨-地形関係の時間・空間変動特性を考慮した山岳域における降雨分布特性の解析

Abstract

The purpose of this study is to clarify precipitation-topography relationships (PTRs) in mountainous regions on various spatiotemporal scales and to determine the physical mechanism of them. By running numerical simulations under realistic conditions using mesoscale model MM5, the PTRs in the Kinki region of Japan were investigated. PTRs on a spatial scale of a mountain slope were found to be described with a Gaussian-type function, which is referred to as GRIM (Gaussian-functional Relationship on an Isolated Mountain). And one of the conditions required for the formation of GRIM was determined: GRIM can be formed when regional average rainfall is more than 10 to 20 mm on a mountain slope. The spatiotemporal fluctuations of GRIM were, then, investigated to clarify how GRIM is connected with large-scale PTRs. As a result, large-scale PTRs were found to be formed by the summation of GRIM's. And it was clarified how large-scale PTRs vary according to the fluctuation properties of GRIM.

Journal

• PROCEEDINGS OF HYDRAULIC ENGINEERING

  PROCEEDINGS OF HYDRAULIC ENGINEERING 49 265-270, 2005

  Japan Society of Civil Engineers

Keywords

• precipitation-topography relationships
• orographic precipitation
• topographic elevation
• mesoscale model
• MM5

Details

• CRID: 1390282680147492736
• NII Article ID: 130003842126
• DOI: 10.2208/prohe.49.265
• ISSN: 18849172
• ISSN: 09167374
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed