Advantages and Disadvantages of Irrigation ... - Riversymposium

Water-Table Spreading
H
H
1e+0
1e-1
1e-2
1e-3
1e-4
1e-5
1e-6
1e-7
1e-8
1e-9
1e-10
10
1
0.1
0.01
0.001
0.0001
• For single patches the area affect by water- table spreading
increases as R increases.
• For an array of patches the impact is increased due to overlap
of the water-tables
• Spacing of patches is important
Single Patch
Array of Patches
ρ
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
τ = 1x10 -8
τ = 1x10 -5
τ = 1x10 -2
0 10 20 30 40 50 60
ρ
τ = 10
τ = 50
τ = 100
a
c
ρ
0 2 4 6 8 10 12
τ = 0.1
τ = 1
τ = 5
0 100 200 300 400 500 600
ρ
τ = 500
τ = 1000
τ = 5000
τ = 10000
CSIRO. Advantages and Disadvantages of Irrigation Mosaics as an Alternative to Traditional forms of Irrigation in Northern Australia
b
d
H(τ,ρ)
H(τ,ρ)
0.12
0.10
0.08
0.06
0.04
0.02
0.00
1e+3
1e+2
1e+1
1e+0
1e-1
1e-2
1e-3
1e-4
1e-5
ρ
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
L = infinity
L = 2
L = 2.2
L = 2.5
L = 5
a
ρ
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
1.0
b
ρ
L = infinity
L = 2
L = 2.5
L = 3
L = 5
0.01 0.1 1 10 100 10000.001 0.01 0.1 1 10 100 1000
ρ
L = infinity
L = 2
L = 2.5
L = 5
L = 10
L = 20
c
L = infinity
L = 2
L = 5
L = 10
L = 20
L = 50
d
0.8
0.6
0.4
0.2
0.0
1e+3
1e+2
1e+1
1e+0
1e-1
1e-2
1e-3
1e-4
H(τ,ρ)
H(τ,ρ)