2.1.2 Irrigation and fountains network
Considering the Persian garden as an image of the
paradise on earth, the water with its scarcity and
limitation have been a sacred and precious element
in the ancient Persia. The presence of water in
Persian gardens has a dual application; a functional
application of irrigation besides an ornamental
and aesthetic purpose (ICHHTO (The Office of
Cultural Heritage of Iranian Cultural Heritage 2010).
Therefore, the pattern of chahar-bagh is usually
defined with the intersected water channels or
streams. The streams usually had a sufficient slope
to enable the irrigation system required for the
garden (Khansari et al. 1998; Pirnia 1994). The water
coming from far distances into the water channels
had a significant impact on the design of gardens; to
the extent of the claim that the structure of gardens
has been shaped according to the irrigation system