Floods risk eroding the Lines

This aerial photograph shows examples of the Nasca lines. The drainage channels right of centre are indicative of erosion caused by run-off water from the Andes.

Recent evidence suggests that some of the lines and figures are now at risk from increased water erosion and deposits left by from flash floods and run-off from the adjacent Andean foothills, a consequence, it is thought, of the El Niño phenomenon in the Pacific Ocean.