Case studies

% vegetated

% infiltration

% runoff

Evapo-transpiration

Natural condition

natural

50

10

10

Modified

modified

6

50

Northwest England

66

1

32

1

20

4

74

2

California, Thompson creek

natural

50 (25 shallow + 25 deep)

10

40

80 - 90

42 (21 + 21)

20

38

50 - 65

35 (20 + 15)

30

35

0 - 50

15 (10 + 5)

55

30

Harzliya, Israel

30 - 40 (residential

45

60 - 75 (industrial)

90

Vegetated cover in low density areas

66

32

Very less vegetated town centre’s

20

74