典型文献
Hydrologic Time Scale:A Fundamental Stream Characteristic
文献摘要：
A new, fundamental catchment attribute called the hydrologic time scale τ governs the rate of delivery of runoff to a particular site, and is equal to ∫ Qdt/∫|dQ|, where Q is discharge and t is time. The value of τ for any gauged site is readily calculated from tabulated discharge data by replacing the integrals with sums. This quantity, coupled with the square root of catchment area, A, form a coordinate pair that embodies the characteristic time and length scales for any catchment, which govern its flow dynamics. The fitting constants used in several unit hydrograph models are simple multiples of τ, so knowledge of τ allows rapid calibration of these models for the particular site, facilitating flow prediction from rainfall data. Values of τ reflect many different landscape attributes, but for multiple sub-basins in watersheds with homogeneous land use and lithologic conditions, they correlate linearly with A. The ratio A /τ provides a characteristic velocity that is high for channelized, floodprone rivers, for flashy urban streams with high impervious cover, and for sites downstream of hydropower dams. Sites with low velocities are resistant to flooding, as their landscapes have a greater ability to delay the delivery of runoff by retention, detention, and infiltration into the groundwater system.
文献关键词：
中图分类号：
作者姓名：
Robert E.Criss
作者机构：
Department of Earth and Planetary Sciences,Washington University in St.Louis,St.Louis MO63130,USA
文献出处：
引用格式：
[1]Robert E.Criss-.Hydrologic Time Scale:A Fundamental Stream Characteristic)[J].地球科学学刊（英文版）,2022(05):1291-1297
A类：
Qdt,channelized,floodprone,flashy,detention
B类：
Hydrologic,Time,Scale,Fundamental,Stream,Characteristic,new,fundamental,catchment,called,hydrologic,governs,rate,delivery,runoff,particular,equal,dQ,where,discharge,value,gauged,readily,calculated,from,tabulated,data,by,replacing,integrals,sums,This,quantity,coupled,square,root,area,form,coordinate,pair,that,embodies,characteristic,length,scales,which,its,flow,dynamics,fitting,constants,used,several,unit,hydrograph,models,simple,multiples,so,knowledge,allows,rapid,calibration,these,facilitating,prediction,rainfall,Values,reflect,many,different,attributes,sub,basins,watersheds,homogeneous,lithologic,conditions,they,correlate,linearly,provides,velocity,high,rivers,urban,streams,impervious,cover,sites,downstream,hydropower,dams,Sites,velocities,resistant,flooding,their,landscapes,have,greater,ability,delay,retention,infiltration,into,groundwater,system
AB值：
0.64591
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机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
