Gravity based spring water supply systems in Andhra Pradesh Lessons
Spring Water Collection System. Water can be collected from a surface ditch, but it is better to dig to firm ground, hardpan, or rock to.
Water can be collected from a surface ditch, but it is better to dig to firm ground, hardpan, or rock to.
Water can be collected from a surface ditch, but it is better to dig to firm ground, hardpan, or rock to. Water can be collected from a surface ditch, but it is better to dig to firm ground, hardpan, or rock to.
