Maximum Lengths and Spacings for Corrugations for Different Slopes, for Deep and Shallow Soils

Posted on

This method of irrigation (corrugations irrigation systems) is very similar to graded furrows, except that the furrows are much smaller in size. The corrugations or rills are evenly spaced in the field. The spacing and size of the corrugations vary with different soil textures. The method is generally more applicable on fine-textured soils that intake water slowly. The more porous the soil, the closer spaced the corrugation should be because of the lateral movement of water. This method is also used on soils that seal over and crust when other types of flood irrigation are used.

Table 1. gives suggested maximum lengths and spacings for corrugations for different slopes, and for deep and shallow soils.

TABLE 1 Length and Spacing of Corrugations

CLAYS

LOAMS

SANDS

Slope

Length

Spacing

Length

Spacing

Length

Spacing

%

m

m

m

m

m

m

Deep

2

180

0.75

130

0.75

70

0.60

soils

4

120

0.65

90

0.75

45

0.55

6

90

0.55

75

0.65

40

0.50

8

85

0.55

60

0.55

30

0.45

10

75

0.50

50

0.50

Shallow

2

120

0.60

90

0.60

45

0.45

Soils

4

85

0.55

60

0.55

30

0.45

6

70

0.55

50

0.50

8

60

0.50

45

0.45

10

55

0.45

40

0.45