PERFORMANCE OF GRAPEVINES UNDER IRRIGATION SYSTEMS - Management, Performance, and Applications of Micro Irrigation Systems - page 268

TABLE 6 (Continued)

Cost of irrigation system

Life
span

L-H
bubbler

Gated
pipes

Items Drip

Year LE per feddan

Gated pipes 10 — — 550

PE tubes (bubblers) 8 mm 5 — 40 —

Fertigation unit 10 100 100 100

Valves and controllers 10 200 120 30

Total capital costs LE/feddan — 2050 1660 1330

Fed is abbreviation for feddan.
One feddan (non-SI Units of area in Egypt) = 1.038 acres = 0.42 hectare (ha) = 4200 m 2 . 2.47 acres =
1 ha.
One LE (Egyptian currency) = 0.1437 $US or one $US = 6.94 LE.
**EXAMPLE 1. Convert 800 LE per feddan to US$/acre and US$/ha.
800 (LE/feddan) = 800 (LE)(0.1437 US$/LE)(1/feddan)(1 feddan/1.038 acre)
= 110.8 US$ per acre.
= 110.8 US$ (1/acre)(2.47 acres/1 ha) = 273.6 US$ per ha.

The annual cost for each irrigation system consisted of fi xed cost and the operating
cost [83]. The annual fi xed costs were calculated using Eq. (13). Depreciation cost dif-
fers from one system to another, according to the life span of the different components
of each system. Depreciation was calculated with Eq. (14). Taxes and overhead ratios
were assumed as 1.5-2.0% of the initial cost. Operating costs were calculated with
Eq. (15).

F.C = D + I + T1 (13)

D = (I.C. - Sv)/ E (14)

O.C. = L.C + E.C + (R&M) (15)

where: F.C.= annual fixed cost, LE/year; D = depreciation rate, LE/year; I = interest,
LE/year = [(I.C. + Sv) × (I.R.)] ÷ [2]; T1 = taxes and overhead ratio, LE/year; I.C. =
initial cost of irrigation system, LE; Sv = salvage value after depreciation, LE; E =
expectancy life, year; I.R. = interest rate per year,%; O.C. = annual operating costs,
LE/year; L.C = labor costs, LE/year; E.C = energy costs, LE/year; and R&M = repair
and maintenance costs, LE/year.
Repair and maintenance cost was assumed as 2, 3, and 0.5% of the initial cost