IWMP-1 - Commissionerate of Rural Development Gujarat State

2. Contour trench
These trenches act as trap for the water and minimise soil erosion. The trenches do not need to be very large to be effective.
3. Gully plug
A small gully bund like this one Prevents a new Gully being formed in the middle of the farm, thus preventing erosion from the
beginning itself. Such bunds would make two parts of one field, thus making it difficult to plough, but some farmers are ready to do it.
4. Stone bunding:
After filling the Staggered Trenches, the excess water flows out in the form of little streams. To stop these streams, the obstruction walls
of the length equal to the width of the streams are made with the help of stones. Such walls are created at an interval of 200 to 300 meters along
the channels of the streams. These walls are known as Stone bunding.
5. Percolation tank
Percolation Tank is the arrangement in which the retaining walls of clay are made and a dam (waste weir) is constructed using cement
concrete. This tank is preferred at the site where two to three rain water streams meet. The outlet is also planned so that excess water overflows
out of it. The Storage Tank is a good basin for water storage.
West Forest Division- Rajpipla Page 63