Biologically

Biology is a natural science that is concerned with the study of life, its various forms and its function, how these organisms interact with each other and with the surrounding environment. The word biology in Greek is made up of two words: bio (βίος) meaning life. And loggia (-λογία) means science or study. Biology: the similarity of vegetation and animal cover on the edges of the African and American states, and the existence of the same fossil.

Branches of biology
Biology is an ancient science thousands of years old and modern biology began in the nineteenth century. This science has multiple branches. Among them are:

Anatomy
Botany
Biochemia
Biogeography
Biofisia
Cytology or cell science
Ecology or environmental science

نبذه عن الكتاب:

This is not an ordinary book on rainfall and runoff. All the general and working formulas
in this book are theoretically derived. The formulas are therefore globally and eternally
applicable, as long as the situations under consideration are within the assumptions and
limitations of the theory. This epitomizes the powerful nature of the physically-based
approach in hydrology. This book covers formulas for flow depth; flow velocity; average
flow velocity; wave celerity; average wave celerity; time of concentration; rising, equilibrium
and falling phases of a hydrograph; forward characteristic; rising, equilibrium and falling
phases of water surface profiles; duration of partial equilibrium discharge; and equilibrium
detention storage for flow on an overland plane, and flow in nine different channel shapes,
which are (i) circular, (ii) parabolic, (iii) rectangular (deep), (iv) rectangular (square), (v)
rectangular (wide), (vi) trapezoidal with equal side slopes, (vii) trapezoidal with one side
vertical, (viii) triangular, and (ix) vertical curb. 

Biology
Human biology
Who is the founder of biology?
The importance of biology
Areas of work in the field of biology
Theories of biology
Research on biology for the first grade of secondary school
Human biology