On the intervening night of July 18 and 19, Delhi received heavy rainfall spell leaving several areas water logged. In the afternoon of July 19, a video went viral on social media showing collapse of houses along Sen Nursing Nala at ITO, Delhi.
The incident happened due to a breach in right bank of storm water drain at the back of WHO building reportedly damaging about 12 houses of Anna Nagar, a fifty years old slum area located along the left bank of the drain.
Continue reading “But Why Did Sen Nursing Drain Breach?”
Dams and reservoirs make rivers sediment-starved and menacing manifold downstream. While heavy rainfall is also a key factor behind the floods, hungry water had a more pronounced effect, says D. Padmalal, Scientist and Head, Hydrological process group, National Centre for Earth Science Studies.
– “When the sediment transport is interrupted, the potential energy of the hungry water released from dams will scour the river banks downstream, uprooting trees or riparian vegetation and damaging bridges and other engineering structures,” explains Dr. Padmalal. Overloaded with silt and clay from the eroding river banks, the highly turbid and viscous water clogs drainage channels. Subsequent discharge of water from the dam will lead to inundation and waterlogging of large areas.
– Hungry water can also develop in high gradient river channels devoid of adequate quantity of sand and gravel, especially during periods of high rainfall. “Years of uncontrolled sand mining have left most of the rivers in Kerala depleted or exhausted of sand and gravel. This creates a situation similar to the release of hungry water from dams,” notes Dr. Padmalal. When the river channel has adequate supply of sand and gravel, the potential energy of the water is used to transport the mixture. The water does not scour the banks or turn muddy.
Continue reading “DRP News Bulletin 1 October 2018: Hungry Water Effect due to Dams & Unsustainable Sand Mining Worsened Kerala Floods”
The news media is filled with this new kid on the block, trying to wake the nation about the need to save our rivers… amazing to see so many film stars, politicians, governments, and public personalities, many of them rather innocently joining the band wagon… some friends were pleading that see, he is able to take the message of rivers to so many people, including lakhs of children… let us try and see if there is something positive here… may be, may be this is just the entry point, but the guy and his team have bigger vision? May be we need to give him longer rope, be more charitable and not jump to negativity?
We have kept all this in mind while writing this.
We see nothing from the people who are leading the rally, or their websites or messages that they understand the real threats faced by and reasons for the state of our rivers, are ready to even list such causes or protest any further move to destroy our rivers. The website claims it is “a nationwide awareness campaign to revive our rivers”. Can missed call save our rivers?
Continue reading “DRP News Bulletin 11 September 2017 (Why This Rally Won’t Help The Rivers?)”