WMS:Overview of Basin Data Equations: Difference between revisions

From XMS Wiki
Jump to navigationJump to search
No edit summary
 
No edit summary
Line 1: Line 1:
Dodson (Dodson & Associates, 1992) compiled several equations from hydrologic publications. WMS has implemented many of these equations and allows you to choose from the ones listed below to automatically compute lag times/times of concentration. Because most of the equations were developed for specific watersheds (e.g. size, land cover etc.) you should consider the assumptions made about a given equation, and try to identify one that used watershed conditions similar to the one you are studying. The following is a list of the equations available in WMS. The SCS also found that for many cases the lag time could be related to the concentration time by the following equation:
Dodson (Dodson & Associates, 1992) compiled several equations from hydrologic publications. WMS has implemented many of these equations and allows you to choose from the ones listed below to automatically compute lag times/times of concentration. Because most of the equations were developed for specific watersheds (e.g. size, land cover etc.) you should consider the assumptions made about a given equation, and try to identify one that used watershed conditions similar to the one you are studying. The following is a list of the equations available in WMS. The SCS also found that for many cases the lag time could be related to the concentration time by the following equation:::


[[Image:image090.JPG]]
:<math>T_{LAG} = 0.6 \ast T_c </math>


This relationship is always used by WMS to determine lag time when a method for computing time of concentration is chosen, or to compute time of concentration when a method for lag time is chosen. Methods used for lag time begin with “TLAG =“ whereas methods used to compute time of concentration begin with “tc =“.
This relationship is always used by WMS to determine lag time when a method for computing time of concentration is chosen, or to compute time of concentration when a method for lag time is chosen. Methods used for lag time begin with “<math>T|{LAG} =</math>“ whereas methods used to compute time of concentration begin with “<math>t_c =</math>“.


===Lag Time Based Equations:===
===Lag Time Based Equations:===

Revision as of 19:22, 26 February 2013

Dodson (Dodson & Associates, 1992) compiled several equations from hydrologic publications. WMS has implemented many of these equations and allows you to choose from the ones listed below to automatically compute lag times/times of concentration. Because most of the equations were developed for specific watersheds (e.g. size, land cover etc.) you should consider the assumptions made about a given equation, and try to identify one that used watershed conditions similar to the one you are studying. The following is a list of the equations available in WMS. The SCS also found that for many cases the lag time could be related to the concentration time by the following equation:::

This relationship is always used by WMS to determine lag time when a method for computing time of concentration is chosen, or to compute time of concentration when a method for lag time is chosen. Methods used for lag time begin with ““ whereas methods used to compute time of concentration begin with ““.

Lag Time Based Equations:

Colorado State
Customized
Denver
Eagleson
Espey
Putnam
Riverside County
SCS
Taylor Schwartz
Tulsa District

Time of Concentration Based Equations:

Fort Bend
Kerby
Kirpich
Ramser


Related Topics