典型文献
Exploring spatial relationships between stream channel features,water depths and flow velocities during flash floods using HEC-GeoRAS and Geographic Information Systems
文献摘要：
Water depths and flow velocities decisively influence the damage caused by flash floods.Geographic Information System(GIS)is a powerful and useful tool,allowing the spa-tial analysis of results obtained by hydraulic modelling,namely from the HEC-RAS/HEC-GeoRAS software.The GIS spatial analysis performed in this study seeks to explain and quantify the spatial relationships between the stream channel features and flow components during flash flood events.Despite these relationships are generically known,there are few studies exploring this subject in different geographic contexts.A 1D hydraulic model was ap-plied in a small watershed in Portugal,providing good results in the definition of floodable areas,water depths and longitudinal velocities.No direct relationship was found between water depths and velocities in the floodable areas;however,negative strong correlations were found between the two flow components along the stream centerlines.Bed slope,channel and flood width,and roughness prove to be highly relevant on the longitudinal varia-tions of water depths and velocities and on the location of maximum values.Increasing peak discharges and return periods(RT)can change the relationships between water depths and velocities at the same location.Results can be improved with more accurate elevation data for stream channels and floodplains.
文献关键词：
中图分类号：
作者姓名：
Miguel LEAL;Eusébio REIS;Pedro Pinto SANTOS
作者机构：
Centre of Geographical Studies and Associated Laboratory TERRA,Institute of Geography and Spatial Planning,Universidade de Lisboa .Edificio IGOT,Rua Branca Edmée Marques,1600-276 Lisbon,Portugal;Forest Research Centre and Associated Laboratory TERRA,School of Agriculture,Universidade de Lisboa.Tapada da Ajuda,1349-017 Lisbon,Portugal
文献出处：
引用格式：
[1]Miguel LEAL;Eusébio REIS;Pedro Pinto SANTOS-.Exploring spatial relationships between stream channel features,water depths and flow velocities during flash floods using HEC-GeoRAS and Geographic Information Systems)[J].地理学报（英文版）,2022(04):757-782
A类：
GeoRAS,decisively,floodable
B类：
Exploring,spatial,relationships,between,stream,features,depths,flow,velocities,during,flash,floods,using,HEC,Geographic,Information,Systems,Water,influence,damage,caused,by,powerful,useful,tool,allowing,analysis,results,obtained,hydraulic,modelling,namely,from,software,performed,this,study,seeks,explain,quantify,components,events,Despite,these,generically,known,there,few,studies,exploring,subject,different,geographic,contexts,1D,was,plied,small,watershed,Portugal,providing,good,definition,areas,longitudinal,No,direct,found,however,negative,strong,correlations,were,two,along,centerlines,Bed,slope,width,roughness,highly,relevant,varia,location,maximum,values,Increasing,peak,discharges,return,periods,can,change,same,Results,improved,more,accurate,elevation,data,channels,floodplains
AB值：
0.50386
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