学科分类
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2 个结果
  • 简介:Amathematicalmodelforsimulatingmorphologicalchangesinspaceandtimeofthe124kmlongalluvialreachoftheKosiRiverbasedonthedataintheperiod1968-79isdeveloped.Equationsareobtainedtodescribethechangesofstreambedparameterssuchasminimumbedlevel,riverwidthandmaximumriverdepth.Fouriersineseriesareusedtofittherivercross-sectionsoverthestudiedreachfordifferentyears.Thegeneraltrendofastreamcross-sectioncanbemodeledsatisfactorilywiththeFouriersineseries.Temporalvariationsinbedlevelandwidthoftheriverhavetimeperiodsofabout7yearand3.2-4.3years,respectively,andarecontrolledbymeanannualdischargewithatimeperiodof13.9years.

  • 标签: Kosi River ALLUVIAL stream Morphology RIVERBED