Dams · Wetlands

Karnataka Wetlands Review 2017: Bellandur Lake Remains On Fire

Wetlands For A Sustainable Urban Future : Text from Face Book post by Vishwanath Srikantaiah on occasion of World Wetlands Day 2018. 

Much grief, energy and monies can be saved if we imagine our ‘tanks’ as wetlands rather than water bodies in the city of Bengaluru.

World wetlands day is celebrated on the 2nd of February every year. For this year 2018 the theme is “Wetlands for a sustainable urban future”.

A simple definition for a wetland is that it is an area that tends to be saturated with water either permanently or seasonally and harbours a distinct type set of plants. Wetlands behave differently from a water body like a lake and need to be managed, if at all, completely differently.

Wetlands harbour bio-diversity much more than only water, have the ability to absorb pollutants and nutrients better, can manage floods, recharge groundwater, moderate temperature and area huge asset for a city.

In the city of Bengaluru itself the Karnataka State Lake Conservation and Development Authority (KLCDA) has sent a proposal to the central government that 176 tanks within the city be declared as wetlands. This would potentially protect these tanks better from encroachment and solid waste dumping as well as the construction of roads within.

The polluted stretches of the Vrishabhavati and the Dakshina Pinakini could also be brought under wetlands protection.

Wetlands, in combination with waste-water treatment plants, are a good way of reviving the tanks in the city. The example of Jakkur and Rachenahalli are possible starting points for an integrated approach to manage water in the city with wetlands playing an important role. Here waste-water treated to secondary standards are then allowed in to the wetlands which remove nitrates and reduce Total Suspended Solids, thus allowing for it to fill the water body. In turn , the lakes allow for fishing and recharge the surrounding aquifers.

Wetlands provide for a range of services including livelihoods for the poorer sections of society. Even now a range of fodder collectors pick up grass and alligator weed ( called Hongonney in Kannada ) for feeding their cattle almost all across the city.

Remedied waste-water from the city can be further treated in the wetlands and used for agricultural purpose. The proposal and project to transfer treated waste-water to the districts of Kolar and Chikballapur can also benefit substantially if wetlands are integrated in to the design at the first receiving tanks. This would also enhance flora and faunal biodiversity in the tanks of these drought prone rural districts at the same time benefiting agriculture there.

Integrating wetlands into the master plan and the urban fabric of cities is the need of the hour and that would be water wisdom.

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Dams · DRP News Bulletin

DRP News Bulletin 12 June 2017 (Rain Bearing Clouds Thinning Out Over India: IMD Study)

A recent IMD study has found that rain-bearing clouds have been thinning out across the country over the last 50 years. The study, published in the IMD journal Mausam, shows that between 1960 and 2010, annual mean low cloud cover (responsible for the bulk of the rainfall) over India has been decreasing by 0.45% per decade on an average.

According to the study, the number of rainy days is also declining during the monsoon season at an average rate of 0.23 days for every decade. This means that the country has lost approximately one rainy day over the last five decades. The study found that while the number of rainy days is decreasing, there is not much change in the total amount of rainfall. This shows a trend towards shorter, heavier bursts of rain.

That is bad news, because heavier raindrops can dislodge wheat and rice grains from their stalks while on the farm. It also means rainwater flows down a slope that much faster instead of percolating underground.

Meanwhile, a new NASA study has warned  the amount of rainfall in the Earth’s tropical regions will significantly increase as the planet continues to warm. As per study rainfall is not related just to the clouds that are available to make rain but also to Earth’s “energy budget” — incoming energy from the Sun compared to outgoing heat energy. High-altitude tropical clouds trap heat in the atmosphere. If there are fewer of these clouds in the future, the tropical atmosphere will cool.

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Dams · Wetlands

Wetlands Review 2016: Legal Interventions

Featured image showing  36 Wetlands in India requiring urgent attention as per a 2014 petition filed in apex court (Image Source: Live Mint

In the third part of Wetlands Review 2016, SANDRP presents an account of major decisions taken by respective Courts for the protection of Wetlands in India. 

In a significant development in April 2016, the National Green Tribunal (NGT) directed all State Governments to submit a complete list of Wetlands[1] under their jurisdiction. The green court was hearing a plea alleging commercial conversion and resultant destruction of several large ecologically important Wetland areas across the country in absence identification and notification by respective State Governments. 

The court also asked the Ministry of Environment, Forest and Climate Change (MoEF&CC) to submit the list of States that had approached it with Wetlands conservation plans.

Continue reading “Wetlands Review 2016: Legal Interventions”