Status Quo and Perspectives of Flood Runoff Analysis for Urban Watersheds

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  • KAWAMURA Akira
    Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University

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  • 都市流域における洪水流出解析の現状と将来展望
  • トシ リュウイキ ニ オケル コウミズリュウシュツ カイセキ ノ ゲンジョウ ト ショウライ テンボウ
  • Current status and prospects of flood runoff analysis in urban watersheds

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<p> This paper outlines the current status of flood runoff analysis for urban watersheds and presents its future prospects. First, I will describe the urban flood disaster, then briefly review the history of the runoff models before explaining the current state of application of flood runoff models for urban watersheds. Next, storage function models as the lumped conceptual model are outlined, and the urban storage function (USF) model is explained. Then, the necessity of a detailed distributed physical model in urban watershed is described by explaining the difference between mesh data and the urban landscape GIS delineation. I introduce TSR model which is a precise distributed physical model utilizing the urban landscape GIS delineation. Finally, I overlook the future issues to be solved for lumped conceptual and distributed physical models as well as making some recommendations for reduction of urban flood disaster.</p>

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