Ahmedabad: Sabarmati has suffered quietly but scientists recently found a way to measure Agony it lasted.
One method is to map the water quality index (WQI).
Can the river support life? How good or safe is river water for human use? A 15-year study, from 2005, noted WQI from Sabarmati worsened along all along.
If 0 is the best number and 1 worst in WQI, then the Sabarmati score at his last leg after passing Ahmedabad and before meeting the Arab Sea varied between 0.45 and 0.7.
This study was conducted by the research team from the International Water Association (IWA).
A team consisting of Anant Patel and Karishma Chitnis measured water parameters in Dharoi Dam, Gandhinagar, Ahmedabad, and Racisapur.
“At the location of Rasikapur, which is located downstream the Sabarmati River, the WQI value ranges from 0.45 to 0.7, which shows the effect of industrial effluent discharge on the quality of the river water final,” the papers.
“Even at the upstream point like Dharoi Dam, WQI ranges from 0.3 to 0.5, which is an indication of lack of pollution load on the river compared to downstream.” Sabarmati flowed from the Aravalli hill ranging from Rajasthan and winding at 371km – 48 km in Rajasthan and the remaining 323km in Gujarat.
In the 51km stage, the river combines with the waper bank on the left.
At 67km, he joined Sei Stream on the right edge and with Harnav at 103 km on the left edge.
Wakal, Sei, Harnav, Hathmati, and Wrap was the Sabarmatus River in Gujarat.
But to understand the degradation of the river, the Geographic Information System (GIS) team from three universities examined the Landsat satellite images of US geological surveys to measure the level of sabarmati turbidity, which flowed through the heart of Ahmedabad.
This research was published in October last year.
Turbidity is a way to measure water turbidity.
Experts found that the pollution rate fell 36% during locking.
The map was obtained for a period of five years: 2015 to 2020.
The map clearly shows that stretching rivers in the city usually appear yellow, red, and green: severe signs of pollution.
The river turned blue, reflecting the ra of the resurrection, during the closing of the corona.
The Landsat Maps contains color code reflectance data.
They showed the level of turbidity, which was produced from the disposal of industrial and domestic waste, increased by more than 36% in the April-May period last year.
The level of turbidity has risen as high as 19.39 milligrams per liter (mg / l) in February that year.
In May, they dropped to only 5 mg / l.
Stretch rivers near the Sardar Patel bridge have the highest amount of metal contamination when compared to upstream, suggesting high anthropogenic activities, the research paper said.
‘Anthropogenic’ shows origin in human activities.
This paper is carried in a reputable journal away from remote sensing applications: society and the environment published by Elsevier.
“We noticed that the average particle material (SPM) in Sabarmati River Water has declined significantly around 36.48% compared to the pre-locking period,” said the paper.
“And a drop of 16.79% was observed from the average spm of the previous year.” The author of this paper is Mohammad Adil Safe from the remote sensing department and GIS application at the Muslim University of Aligarh; Mohammed Salman from the Geography Department in Jamia Millia Islamia, Delhi; And Ali Yunus National Institute of Environmental Studies, Tsukuba, Japan.