NASA satellite can monitor most of world's irrigation canals, study finds

A study found that NASA satellite data can track irrigation canals worldwide, covering most of the global network. The approach could help farmers and water managers allocate water more accurately instead of relying on scattered gauges and local reports.

• NASA satellite covers most of the world's irrigation canals
• Canals span millions of kilometers and feed global agriculture
• Water levels are currently tracked with scattered gauges and inspections