Soil and Water Conservation Works - Afforestation, Reforestation and Forest Restoration in Arid and Semi-arid Tropics - page 97

Crest of Downstream Checkdam is at Toe Level
of the One Upstream

Ground Slope

s

∇

∇

Layout of Checkdams in a Stream

1.5 m

Stone Pitching in Downstream

3 m

3 m

Section of a Checkdam

w w = Length of Checkdam,

is Determined by the
width of Stream

1.50 m

Frontal Section of a Checkdam

a Details of Loose Stone Checkdams

20% slope

Soil F i lled in Terrace

Drystone Masonry Wall
With Coping in LC

Wall Runs on Contour,
Has Section 45 x 60 cm

10 to 20 m

b Details of Contour Dike-cum-Terraces

Properties of Standard Dike Sections

Dyke No. Section Stone Volume/m Soil Required/m

CD-1
CD-2

0.45 x 0.45
0.45 x 0.60

0.20 m 2
0.27 m 2

0.50 m 2
0.90 m 2

Fig. 5.5 Details of loose-stone check dams

the stream. The toe of the structure should be pitched at least for a few metres, with
two courses of masonry.
In a second method of construction of check dams, one can start with the core
wall, and then build up the slope upstream by adding pitching courses. In contrast