bifurcation ratio

bifurcation ratio

[bī·fər′kā·shən ‚rā·shō]
(hydrology)
The ratio of number of stream segments of one order to the number of the next higher order.
References in periodicals archive ?
Eleven geomorphic indices: Basin Length, Basin Area, Basin Perimeter, Basin relative Relief and Relief Ratio, Hypsometric Integral, Asymmetry Factor, Elongation Ratio, Stream Length, Stream Number and Bifurcation Ratio Index, are calculated from DEM data to determine the relative tectonic activity along the JFZ.
The bifurcation ratio ranges from 2 to 8.5 and the average bifurcation ratio of the basin is 3.42 which specifies that this region is homogeneous in lithology and tectonically stable.
Important areal, linear and relief parameters were computed such as perimeter, basin area, basin length, drainage density (Dd), stream frequency (Fs), elongation ratios (Re), bifurcation ratio (Rb), circulatory ratio (Rc) etc.
The relation between stream length ratio and bifurcation ratio confirms geological, geomorphological and hydrogeological nature of the research area.
Selected tributaries of the Kunhar River Sub basin (out of 19) their stream orders and Bifurcation Ratio (Rb) for Different no.
Streams Length: The lengths of various streams were Bifurcation Ratio (Rb): It describes the ratio of the number of streams of a given order to the next higher order.
In order to evaluate the hazard probability of the different basins, some of the morphometric parameters were used these morphometric parameters include drainage density, drainage frequency and bifurcation ratio. Drainage density is a measure of the total network lengths of the basin to the total area of this basin (Melton, 1958, 35).
The overall hazard degree which determined by comparing the hazard degree resulted from bifurcation ratio versus drainage frequency and bifurcation ratio versus drainage density (Table 3) indicate that one basin high possibility for flash floods and Three basins have moderate possibility of flash floods and two basins have low possibility of flash floods.
The bifurcation ratio is the slope of the line formed by a semilog plot of stream number to stream order.
The bifurcation ratio and Equation 10.1 can be used to estimate the number and length of lower-order streams if a site visit indicates stream orders were miscalculated.
Average value of bifurcation ratio shows that development of the basin was independent of structural control.
In addition to this, linear aspects of morphometry such as stream order (Nu), bifurcation ratio (Rb) and stream length (Lu) were calculated following the work of Horton [5], Strahler [6] and Chorley [23].