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Climate change affecting hydropower generation in India: study

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6 years ago

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Climate change affecting hydropower generation in India: study

~By Dinesh C Sharma

A new study has suggested that the government must consider changes occurring due to climate change while planning new hydropower projects.

The generation of hydropower from top seven hydropower projects in India has suffered due to climate variability in the past six decades. Future projected climate change may also hit reservoir operation for power generation from these projects, says the study done by researchers from the Indian Institute of Technology, Gandhinagar.

“Our results provide important insights on the impacts of observed climate variability and projected future climate change on streamflow and hydropower production in India, which can assist planners and policy makers. For future planning, careful consideration of uncertainties in precipitation projections, along with robust and comprehensive adaptation strategies, is required,” researchers have observed in their study published in journal Scientific Reports on Monday.

The study is based on observed climate variability between 1951 and 2007, and model simulations for projected climate change under different scenarios, in relation to top seven large hydropower projects – Nathpa Jhakri, Bhakra Nangal, Srisailam, Nagarjuna Sagar, Hirakud, Sardar Sarovar, and Indira Sagar. These large reservoirs are located in four major Indian sub-continental basins – Indus, Krishna, Mahanadi, and Narmada.

Using past observations from India Meteorological Department (IMD) and model simulations for future climate change, the study has found that seven large hydropower projects have experienced “significant warming” and a decline in rainfall and streamflow during the period 1951–2007. All hydropower projects are projected to experience a warmer and wetter climate in the future.

“There might be a seasonal variability in reservoirs that get streamflow from snow and glacier melt. Due to higher increase in air temperature, flow due to snow and glacier melt is projected to decline in the pre-monsoon season as shown for Bhakhara Nangal and Nathapa Jhakri projects,” explained Vimal Mishra, Associate Professor in Civil Engineering at IIT Gandhinagar who led the research, while speaking to India Science Wire.  Other hydropower projects, he said, might see increase in annual hydropower production under the projected future climate, mainly due to increase in the monsoon season rainfall under the warming climate. It is also likely that the projected increase in rainfall can be due to rise in extreme precipitation events in the future.

Most of the catchments of the large reservoirs are projected to experience substantial warming under the projected future climate. The highest warming is likely for Nathpa Jhakri and Bhakra Nangal where the annual mean temperature is projected to increase by more than 6.25 degrees by period 2070–2099 under the Representative Concentration Pathway (RCP) 8.5 scenario. There will be increase in streamflow for the reservoirs located in the central and south India primarily due to the increase in the monsoon season precipitation under the future climate.

Members of the research team; Saran Aadhar and Harsh Shah!

Members of the research team; Saran Aadhar and Harsh Shah!

Other factors like land use and land cover changes will also be critical in future in response to urbanization and expansion of agriculture that will affect streamflow and so as hydropower production, the study says. The projected increase in precipitation and streamflow may also result in an increased sediment load to the reservoirs, which can affect the storage capacity of reservoirs and hydropower potential in future. Moreover, future irrigation demands can also influence the hydropower potential of the reservoirs.

“This study does not seem to take into account increased disaster potential of the new rainfall patterns. There are other important factors also such as increased upstream water use, both surface and groundwater, reducing inflows for projects like Sardar Sarovar, Srisailam and Nagarjunsagar,” pointed out Himanshu Thakkar of South Asia Network for Dams, Rivers and People.

The research team included Syed Azhar Ali, Saran Aadhar , Harsh Shah and Vimal Mishra from the Department of Civil Engineering, Indian Institute of Technology Gandhinagar. (India Science Wire)

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WhatsApp to introduce Native File Sharing feature similar to Apple’s AirDrop

Users can choose to be visible to others without disclosing their phone numbers to people who are not their contacts.

Published

10 months ago

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January 24, 2024

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A Meta-owned messaging platform, WhatsApp is all set to introduce a new feature that allows Android users to share files with another user nearby. According to reports, the feature will be developed similar to Apple’s AirDrop.

The file sharing feature nearby is not currently available for beta testers. However, according to a report from WhatsApp feature tracker WABetaInfo, it seems that the feature will soon be introduced. The report reveals a screenshot that shows an option within the app stating, to share files with people nearby, along with a list of nearby users.

It is interesting to note that users can choose to be visible to others without disclosing their phone numbers to people who are not their contacts. In order to share files with other users, one needs to wait for nearby users to accept their request. The process involves a unique interaction, where nearby users can shake their device to receive incoming share requests. It is important to note that this feature is designed with end-to-end encryption to ensure user privacy.

In the upcoming update, WhatsApp is expected to introduce a nearby file-sharing feature. However, the current beta version for Android, which is 2.24.2.20, has addressed a camera issue. Some Android beta testers have reported difficulties in launching the camera within the app after the 2.24.2.13 update. Upon launching, users were presented with an error message that said, can’t start camera, please restart your device. This issue persisted even after restarting the device or relaunching the app.

The latest beta update of WhatsApp, located at 2.24.2.20, has fixed the camera bug. This allows users to launch the camera within the app and share photos and videos with their contacts without any interruptions. As WhatsApp continues its efforts to improve its features and address bugs, users can expect a better messaging experience on the platform.

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Meesho mega blockbuster sale: E-commerce platform to offer 80 percent discount on electronics

The e-commerce platform’s first mega blockbuster sale will sell more than 400 brands directly with the help of authorised partners on its digital store called Meesho Mall.

Published

1 year ago

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October 6, 2023

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Meesho online shopping app

Ahead of the festive season, e-commerce platform Meesho’s mega blockbuster sale is starting on Friday, October 6, 2023. The platform will provide a massive discount of up to 80 percent on different categories such as essentials, accessories, electronics, footwear, etc.

The blockbuster sale is scheduled to conclude on October 13, 2023. Notably, the Softbank backed e-commerce platform is starting its festive sale a day before Flipkart or Amazon’s festive sale goes live.  The e-commerce platform’s first mega blockbuster sale will sell more than 400 brands directly with the help of authorised partners on its digital store called Meesho Mall.

Reportedly, the platform also added over 50 lakh new customers during these sales. More than 75 percent of the demand was received from Tier-II cities, including Amravati, Aurangabad, Dehradun, Nellore, Solapur, and Warangal. The platform further claimed that they have added more than 2 lakh sellers in the past two years.

Recently, Meesho affirmed that  they have received over 10 million (approx) from its pre-festive sales during Onam, Raksha Bandhan, and Ganesh Chaturthi. The platform has more than 14 lakh sellers, selling approx 12 crore products in 30 different categories. 

In an effort to increase the seller base, the company announced the onboarding of non-GST sellers on the platform earlier this week. The GST council announced to permit the e-commerce platform to onboard sellers with turnover of up to Rs 40 lakh.

Prior to Meesho’s Mega Blockbuster Sale, the company introduced a loyalty programme during which eligible users will earn Smart Coins, which the user can redeem every time they make the purchase of any products on the platform. 

As per Redseer, over 140 million shoppers are likely to make purchases during the festive season. This will enhance the Gross Merchandise Value (GMV) of the Indian e-commerce sector by 18 to 20 per cent and may touch Rs 90,000 crore as compared to Rs 76,000 crore last year.

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Apple launches iPhone 15 series, India price, features, availability  

The iPhone 15 series will be available in India from September 22 but iPhone lovers can also pre-order, starting from September 15 onwards.

Published

1 year ago

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September 13, 2023

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Apple launched its most anticipated iPhone 15 series, including the iPhone 15, iPhone 15 Plus, iPhone 15 Pro and iPhone 15 Pro Max during the Wonderlust event globally on September 12 night.

The iPhone 15 series will be available in India from September 22 but iPhone lovers can also pre-order, starting from September 15 onwards.

People can buy a new iPhone 15 or upgrade it to the old one. There are five colours available for the people.  

According to reports, Apple has been manufacturing the iPhone 15 series in India and China. Apple has moved 7% of its iPhone production to India. Previously, India was not making the newest models. The Centre’s production-linked incentive (PLI) scheme for smartphones played a part in Apple moving its production to India.

The new iPhone 15 has been launched with the same starting price as its prototype, the iPhone 14. The 128GB variant is priced at Rs 79,900, while the 256GB variant costs Rs 89,900. For people who need more storage, the 512GB variant is available for Rs 1,09,900.

This latest iPhone series puffs a 6.1-inch display and comes in five different colours which are pink, yellow, green, blue, and black. While the design remains the same as the previous models, the iPhone 15 features a dynamic island notch instead of the usual notch, which was highly popular among the iPhone 14 Pro phones.

The camera part of the iPhone series has undergone significant upgrades, the new iPhone 15, with an enhanced 48-megapixel primary sensor replaces the 12-megapixel dual camera system which was available in the previous iPhone 14. This significant improvement promises better low-light photography and portrait shots.

The tech giant announced that the iPhone 15 has an all-day battery life, making it more convenient for users to go about their daily activities without worrying about their phone’s battery.

The iPhone 15 Pro models feature a lighter body and thinner bezels. The new AirPods Pro with USB-C charging case will support Lossless Audio with Apple Vision Pro.

Additionally, the iPhone 15 is powered by Apple’s A16 bionic processor, an upgrade from the A15 bionic chipset used in the previous iPhone 14 and iPhone 14 Plus models. The Pro models had the faster and better A16 chip, but now this feature is available in all iPhone 15 models.

The USB-C port on the standard iPhone 15 and iPhone 15 Plus remain limited to lightning speeds up to 480 Mbps. The iPhone 15 Pro and iPhone 15 Pro Max support USB 3 speeds up to 10 Gbps. People will need to buy a separate 1-meter Thunderbolt 4 Pro cable for Rs 5,724 or Rs 10,701 for the 1.8-meter cable to support faster speeds.

The dynamic island notch feature, which can adjust its size according to notifications, was widely discussed before the launch of the iPhone 15. This unique feature can now be available in all models of the phone.

Another important feature of the iPhone 15 is the shift to the USB Type C charging port. Apple has abandoned the lightning port in favour of the more commonly used USB Type C charging port. This means, there is no longer a need for a special iPhone charging cable to be carried around everywhere you go.

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