Similar forms of hydrological drainage basins (SHDB) are calculated
using several mathematical equations. The most important and famous
ones are the Elongation ratio and Circulation ratio equations. These
equations are not used only to categorize
the water drainage basins
system according to their geomorphological likeness from being
rectangle or circle, but also they are very helpful means for quantification
and providing geomorphological information about the basins when it
comes to provide geomorphological analysis and explanations for these
basins.
However, this research shows that both equations are not capable of
answering all the questions about SHDB when results are cross validated
by the in-situ observations. It appeared that, when performing the
Elongation ratio equation on chosen hydrological drainage basins, it is
useless and does not match the reality in the field as it doesn’t classify the
drainage basins according to it likeness of being rectangle or circle. As
for Circulation ration equation, the results were generally closer to the
geomorphological reality in the field; however, it did not help in ordering
the drainage basins to their circular morphological similarity. Therefore,
two alternative equations were introduced to overcome these problems.
The results yield better accuracy in classifying the drainage basin according to their morphological shape compared to the rectangular or
the circular especially when cross validation is applied.
The known methods (Horton, Sterhler and Shreef) failed in
classifying the stream ordering system and to estimate the actual volume
for the river net according to the stream ordering class. The proposed
method enabled the classification in spite of the difficulty of coding the
stream ordering system classes based on it.
This search include making laboratory tests on sandy soil samples
,wich were taken from Damascus Suburb (Alkastal-Maarona-
Alsallema) and from Hama(Alsalameya), physical and clasificated
tests were made besides oedometer tests, two limited cases w
ere
studied :maximum loose and maximum dense for each soil.
Values of deformation modulus (Eoed) were determined from
oedometric compression curves at various compression levels, and
particle shape parameters (sphericity-roundness-elongation) were
founded for each soil then the experimental equations between
last parameters and deformation modulus were concluded.
