Tracking Yamuna's Toxic Footprint

Summary

October satellite images (October 2–22) were used because November’s smog distorts satellite readings and river conditions after the monsoon remain broadly similar through Chhath. What satellites show Satellite images show the same break at Wazirabad. NDTV Datafy analysed Sentinel-2 images from October to measure how clear the water is and how much algae it holds, in the river next to each ghat. The three upstream ghats have the clearest water and the weakest algae signal. Below Wazirabad, the water turns murkier and the algae signal is about three times stronger. As algae decay, they use up…

Description from NDTV.