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From: Dan Richter (1:317/3)
To: All
Date: Tue, 22.09.20 13:00
MODIS Pic of the Day 22 September 2020
September 22, 2020 - Flooding in Pakistan


Flooding in Pakistan

Torrential monsoonal rains brought devastating flooding to Pakistan in
August and September 2020. According to media reports, by August 9
three days of monsoonal rains had killed almost 50 people across the
country and had damaged over 100 homes. On August 29, Reliefweb
reported that the city of Karachi received the heaviest rain in a
single day ever recorded in its history when 231 mm (9 inches) of rain
fell in just 12 hours. That city received 484 mm (19 in) of rain during
August 2020—the highest monthly rainfall on record for the last 90
years. Pulses of severe rain have continued through late September,
resulting in widespread, devastating flooding.

Pakistan’s National Disaster Management Authority has published a
monsoon damage report covering June 15 – September 21. Preliminary
assessments tally damage to 13 roads, 10 bridges, 20 shops, 3 hotels, 5
masjid (mosques), and 217,848 houses this season. 400 deaths and 392
injuries have been counted. As of September 21, 196 relief camps were
operation in the province of Sindh and were housing more than 23,600
people. More than 11,000 people have been evacuated, along with 299
people rescued by 10 boats in District Dadu by Armed Forces and
District Administration. Fortunately, dry weather is forecast for the
next several days.

On September 20, 2020, the Moderate Resolution Imaging
Spectroradiometer (MODIS) on board NASA’s Aqua satellite acquired a
false-color image of flooding in Pakistan. This type of false-color
image uses infrared and visible light (MODIS bands 7,2,1) to help
differentiate water from vegetation or soil. Vegetation appears bright
green, open soil appears tan, and water appears blue or inky-black.
Clouds often appear tinged with electric blue. In this image, the
twisted Indus River appears quite wide and water can be seen over the
entire green flood plains. In some areas, especially at the edges of
the flood plains, copious deep, dark water is easily visible.

While a single image captures the flooding on a given date, when
assessing the extent of damage and/or change it is often helpful to be
able to compare two different dates. Thanks to the NASA Worldview app,
a roll-over comparison of two images of the same scene, one captured on
August 3 (before the record-setting rains fell) and this one, captured
on September 20, can be seen here.

The NASA Worldview app provides a satellite's perspective of the planet
as it looks today and as it has in the past through daily satellite
images. Worldview is part of NASA’s Earth Observing System Data and
Information System. EOSDIS makes the agency's large repository of data
accessible and freely available to the public.

Image Facts
Satellite: Aqua
Date Acquired: 9/20/2020
Resolutions: 1km (55.5 KB), 500m (201.4 KB), 250m (627.4
Bands Used: 7,2,1
Image Credit: MODIS Land Rapid Response Team, NASA GSFC

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