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.
As stated by Costa (1987), the number of flood events greatly reduces as a function of drainage area A and drainage density
These parameters comprise the compression factor, form factor, elongation factor, streams frequency, drainage density
, Bifurcation Ratio, drainage texture, concentration time and basin shape, all of which corresponding to the drainage network of the basin.
The mean pressure in the drainage cavity and drainage density
Lithology, road buffer, terrain units, land cover, and drainage density
were helpful in significantly reducing the AIC.
Topographic maps provided information on the drainage network and watershed limits which were used to compute maps of drainage density
(DD) distribution and a watershed distance.
(D): The ratio of total channel length of all orders to the area of the basin is defined as Drainage Density
(Strahler 1958 Vijay 2003 Bassey and Joel 2010).
They are used to identify the geology, geomorphology, soil, lineament density, drainage density
, rainfall and landuse for maps that indicate the occurrence of groundwater (Preeja et al, 2011).
Their drainage density
varies in the way you would expect from the complex response of precipitation to topography," said Scanlon.
is a measure of the total network lengths of the basin to the total area of this basin (Melton, 1958, 35).
The porosity of the drainage layer (p) is calculated knowing drainage density
and particle density and is expressed as a percentage by volume:
To find out the pattern of drainage density
, drainage frequency and drainage texture of the study area