Watershed Scale Evaluation of Flood Mitigation Function of Paddy Fields Installed with Runoff Control Devices

• YOSHIKAWA Natsuki

  Research Center for Natural Hazards and Disaster Recovery, Niigata University

• NAGAO Naoki

  Toyama Prefectural Federation of Land Improvement Association

• MISAWA Shin-ichi

  Faculty of Agriculture, Niigata University

Bibliographic Information

Other Title

• 田んぼダム実施流域における洪水緩和機能の評価
• タンボダム ジッシ リュウイキ ニ オケル コウズイ カンワ キノウ ノ ヒョウカ

Abstract

Since 2002, Kamihayashi district in Niigata prefecture has been undertaking flood mitigation measures using paddy fields by installing runoff control devices in drainage pits. The purpose of this study is to evaluate the flood mitigation performance of a paddy field with runoff control devices by using combined hydrologic analyses and flood routing. The model constructed for runoff analysis is composed of the following three modules; mountain-urban module where the overland flow was estimated by the Kinematic Wave method, paddy field module where runoff from paddy fields was calculated by water balance analysis, and river/canal module where flood routing was performed by the one-dimensional unsteady flow model. The output of the first two modules represents the input of the third module. The result of the simulation shows that the main river and canal discharge would be decreased by 25% to 29% and water level would be lowered by 0.17 to 0.23m in the case of all the paddy fields being installed with runoff control devices. From these outcomes, it is confirmed that the runoff control measure in the study area is functioning effectively.

Journal

• Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering

  Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 77 (3), 273-280, 2009

  The Japanese Society of Irrigation, Drainage and Rural Engineering

Keywords

• Paddy field with runoff control devices
• Flood mitigation function
• Unsteady flow model
• Kinematic Wave model
• Water balance analysis of paddy fields

Details

• CRID: 1390282680264433024
• NII Article ID: 10025641349
• NII Article ID: 20001245249
• NII Book ID: AA12240517
• DOI: 10.11408/jsidre.77.273
• ISSN: 18847242
• ISSN: 18822789
• NDL BIB ID: 10366451
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10366451
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
  • Crossref
• Abstract License Flag: Disallowed