Stepwell with tunnel system helps transform Rivona farm | Goa News
Panaji: Dug decades ago on a hillside in Rivona, septuagenarian farmer Pandurang Patil’s stepwell is hand-carved with tunnel systems known as surangam, built using an ancient engineering technique once practised in parts of South India.“In plains, underground aquifers spread water evenly in broad underground water tables. One person digs a well at 8m, and nearby…