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Here's a compilation of some timelapse animations that show different stories from across India over the 3 decades (1989 - 2018) . Created with @googleearth @EarthOutreach #newyear2020

1: Restless #Brahmaputra n tributaries meandering,changing course in #Assam
2. Growth of Brick Kiln industry in the banks of #Hooghly, #Rupnarayan rivers near #Kolkata (brown polygons close to the rivers' banks) #WestBengal
3. Embankment failure in #Kosi River (2008) caused flooding. It also left a sediment footprint that was visible from satellites. #Bihar
4. #Delhi #Urbanization
5. Invasive species/plantation trees growth in #Kodaikanal #Palani hills which has destroyed native shola grassland/forest mosaic
6. Marching Islands of #Odisha #Ocean Dynamics
7. Growth of #Salt industry in the tidal flats of the gulf #Gujarat #Kutch #Kandla
8. Shrinking of #Thane Creek; #Mangroves (expanding and dying in different places); Growth of #NaviMumbai
#Mumbai #Maharashtra
9. Construction of port, shipyard in #Ennore #Kattupalli cause beach formations and destruction in rhythmic fashion #Chennai #TamilNadu
10. #Glacier induced debris movement in #Gangotri. #Gaumukh section (top most section) indicates receding of #glacier #Uttarakhand
11. Meandering #Ganges forming oxbow lakes close to Kosi river meeting in #Bihar
12. Mining in #Gevra #Korba #Chattisgarh
13. #Prawn farming growth in #AndhraPradesh; Conversion of paddy fields into brackish water aquaculture ponds #godavari
14. Surface mining in #Aravalli hills #Rajasthan
15. Growth of #Singrauli coal mines #Uttarpradesh #Madhyapradesh
16. #Neyveli lignite mines expansion in #TamilNadu
17. #deforestation in #Assam
18. #UrbanExpansion in #Bengaluru over flood plains and valleys #Bellandur #Varthur #Karnataka
19. Beautiful #Mahanadi river meandering in #Odisha
20. #Conversion of #Deserts into #farmlands in #Rajasthan near Phalodi, Jodhpur
I would post more animations this week in this thread! Please read and RT
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#newyear2020 #Brahmaputra #Assam #Hooghly #Rupnarayan #Kolkata #WestBengal #Kosi #Bihar #Delhi #Urbanization #Kodaikanal #Palani #Odisha #Ocean #Salt #Gujarat #Kutch #Kandla #Thane #Mangroves #NaviMumbai #Mumbai #Maharashtra #Ennore #Kattupalli #Chennai #TamilNadu #glacier #Gangotri #Gaumukh #Uttarakhand #Ganges #Gevra #Korba #Chattisgarh #Prawn #AndhraPradesh #godavari #Aravalli #Rajasthan #Singrauli #Uttarpradesh #Madhyapradesh #Neyveli #deforestation #UrbanExpansion #Bengaluru #Bellandur #Varthur #Karnataka #Mahanadi #Conversion #Deserts #farmlands

More from @rajbhagatt see all

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Raj Bhagat Palanichamy
@rajbhagatt
Thread:

@nytimes has carried an article how cities would be under water which shows #Mumbai being wiped out

We need to exercise caution before using this data n inferences in Indian context!

nytimes.com/interactive/20…

FYI
@PrinSciAdvGoI @dishashetty20 @rapiduplift @RyanMaue
Currently elevation data like SRTM have a vertical error i.e height data created by satellites don't represent ground height very accurately due to buildings, trees etc. So while doing analysis there's a possibility of understimating areas affected by floods, storm surge etc

2/n
Inorder to overcome this issue, the authors of the paper had tried to create an AI model that can correct the elevation bias in the data. The AI model is built with ~23 parameters like population density, vegetation etc to explain the variation in the satellite data.

3/n
Read 15 tweets
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Raj Bhagat Palanichamy
@rajbhagatt
@rapiduplift @JamwalNidhi SRTM does have vertical bias however the correction methodology is not sound enough to overcome that in a more accurate manner.

The problem I see is with ML algorithm which uses LIDAR data and ~23 parameters from developed countries as training and testing datasets
@rapiduplift @JamwalNidhi These parameters come in coarse resolution datasets (some of them as coarse as a km). Also, The relationship between those parameters and Elevation bias would vary between developed and developing countries. However the training data doesn't account this.
@rapiduplift @JamwalNidhi For eg, population density is related to Building heights to some extent. But it cannot be assumed as the same for US and India. So it is likely to exaggerate bias in India

Params like Vegetation r also problematic as they report difficulty in estimating for places like Florida
Read 5 tweets
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Raj Bhagat Palanichamy
@rajbhagatt
Thread - India's flood plain issue:

There r so many flood incidents this year. One big problem s that we haven't mapped flood plains yet. Many crucial infra (road, railway) are built in flood plains with less care

Kabini Flood simulation shown here

FYI @PrinSciAdvGoI
1/n
In this case study, We would look at Nanjangud, a small town in the banks of #Kabini river in #Karnataka

Like #MahalaxmiExpress case, Kabini takes a sharp bend n a highway is present in flood plains

Map shows Kabini river's path near Nanjangud (flood sim. was done for this)
2/n
In August this year, Kabini flooded. This satellite image shows the area that was flooded. Black indicates water

Most of the flooded areas were farms

But two sections of the flooded areas have highways n builtup area in them (marked in red)

Data @CopernicusEU @sentinel_hub
3/n
Read 8 tweets

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Dr Nigel Clarke
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#Thread Sharing some data on the significance of Jamaica’s current 19 consecutive quarters of year-on-year quarterly economic growth.
Jamaica has now experienced 19 consecutive quarters of economic growth. This is after the modest growth in the 3rd qtr of 2019 over the 3rd qtr of 2018, despite the significant external economic shock, from US/China trade tensions, that led to the closure of JISCO/Alpart plant.
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Thread: It's clear that #Pakistan plans a massive insurgency campaign against #India that would be backed by the army. India's response should be to retaliate with much greater force & take the fight to Pakistan's territory including POK. newsx.com/amp/national/j…
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#Pakistan is actually playing into #India's game. Pak's insurgency & supportive military actions will show Pak as the aggressor and India's retake of Pak occupied Kashmir in retaliation for such actions will be totally accepted. India already gamed the whole scenario.
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#Thread

It has been suggested that Private Equity firm KKR is responsible for #CafeCoffeDay founder #VGSiddhartha's suicide.

The firm has come under scanner in our research in many aspects of National Security as well.

Here is a thread on the various operations of KKR in India
As per the report MO of foreign PE firms like KKR is to borrow money from Indian Banks at 8-9% and then lend it to Indian businesses at a whopping 20-25% - the high rates of interest makes it difficult for native business to survive or remain profitable to repay the lenders.
KKR is the second largest foreign PE investor in #CCD with 6.07% (1.28 crore shares) after selling approx 4.25% in Feb 2018, making at the time 10.3%. Foreign investors together hold 22.35% stake in #CafeCoffeeDay valued at Rs 724 crore.
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Dr. Waitman Wade Beorn
@waitmanb
[THREAD] More on the @HolocaustMuseum statement and the letter of concern from the scholarly community.

There are some misunderstandings going on that need to be addressed.

Let's talk about this. Warning: long #thread
Here is the official USHMM statement.

ushmm.org/information/pr…
Here is the Letter of concern by concerned scholars written and coordinated by @DrO_aorzoff and @Anika_Walke. As of now, over 375 have signed.

nybooks.com/daily/2019/07/…
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The Weather Channel India
@weatherindia
#Thread | Here's how climate-induced changes in plant behavior are hurting local economies across India.
wxch.nl/30SWTOW

#ClimateChangeIsReal
📸 Pixabay Man Picking Yellow Cocoa Fruit
1⃣ In #Uttarakhand, increasingly warmer winters are making #Rhododendrons bloom earlier than usual; during February-March instead of its usual schedule of March-May.

📸 Ssteaj - Own work, CC BY-SA 4.0
The season is not the best time for #Rhododendrons, because late winter rains in February-March wash away the blooms, affecting local population dependent on making juice, jams and jellies from the flowers.
#ClimateChange
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Tejasvi Surya
@Tejasvi_Surya
Swatantra #VeerSavarkar - one of the greatest patriots of India, father of revolutionary movement, classical libertarian, Hindu hriday samrat, champion of oppressed, warrior of social justice - my pranams 🙏

#NewIndia will undo injustice that history has done to you!

#Thread
Here are a few facts that Congress sponsored Historians will conveniently forget but young India must reverentially remember about #VeerSavarkar

He was the first political leader to daringly set Absolute Political Independence as India's goal (1900)
#VeerSavarkar was the first Indian political leader to daringly perform a bonfire of foreign (English) clothes (1905).

He was the first Indian to organize a revolutionary movement for India's Independence on an international level (1906).
Read 13 tweets

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