This Presentation provides information about farm tank

1. Farm Tank
Water Harvesting in Rural Areas

2. Image of Farm Tank

3. Construction of farm tank
Steps are as follows
• Digging/Excavating the area which will be
collector for water
• Spreading a Polythene sheet called Agrifilm
over the area
• Location should be such that rain water as
well as water from slop also should be
collected
• It can be also covered to avoid evaporation

4. Construction
Selection of site
• The site should not be too big or too small
• Stony site should be avoided
• The soil should be free from salinity or
alkalinity
• Prefer a area having tree plantation nearby so
that silt deposit will be less in the tank

5. Construction
• The top of the embankment should be
sufficient enough to have road from both ends
• More depth causes more hydrostatic pressure
on bottom hence depth of pond should be
kept between 3 to 5 meters max
• Side slope should be made as per texture of
soil .

6. Agrifilm lining
• Remove weeds and stones from sides of pond
• Make steps in vertical intervals to hold agrifilm
• Dig continuous trench on top for anchoring
LDPE agrifilm and preventing it sliding down
• Spray weedicide on sides to arrest weed
growth
• Avoid excessive straining and tightening of
film

7. Cross section of farm tank

8. Advantages
• Easy to construct
• Cost effective
• Less maintenance required
• Good for small areas
• Sufficient for water needs of a small farm

9. Assignment
Construction of a farm tank
• Area of around 20,000 sq feet
• Materials required
• Selection of site area
• Cost