Construction of runoff water collection ponds
This is similar to the farm pond, however, it is
dug for more diversified purposes. In runoff water collection ponds, rainwater is
harvested at the mid or lower slope of a sloppy land or hills for multiple uses
including the supply of water for drinking, crop production and fish farming. On
account of high water percolation and seepage due to higher permeability,
harvested water may be unavailable within 1-2 months after rainfall recedes.
Therefore, low-density polyethylene (LDPE) lining of the pond is advocated in
areas with high soil permeability to extend its use for a larger period,
preferably throughout the dry season.