Pune River Front Development Project

The city of Pune receives medium rainfall. However, it is located at the foothills of the Sahyadri mountains that form the source of major Indian Peninsular rivers. The mountains received over 6000 mm of rains in the monsoon. The Sahyadri divides this precipitation into two regions, one half being diverted to the Arabian sea and the other draining in to the Bay of Bengal. Most of the rainfall to the East of the Sahyadri is dammed. However, there is enormous land in the free catchment which still reaches the rivers.

Pune city has five rivers, Mula, Mutha, Ramnadi, Devnadi and Pavana that join up to form the Mula-Mutha. In short, water flows into Pune from 5 different catchments and there is only one outlet to that, the Mula-Mutha river. Pune’s topography is saucer shaped, which leads to water gushing down from different directions from the catchments when it rains heavily. This water must normally reach the rivers, but the urban sprawl has now changed the natural contours and flows due to which the water does not reach the river. This is a major reason for the frequent flooding in the city.

And the frequency of flooding is on the rise in Pune over the last few years as urbanisation is leading to more changes in the land use, destruction of natural habitats and landscapes, and the obliteration of first and second order streams. At the same time, rainfall patterns are also changing due to climate change, leading to more rainfall in shorter time spans. This too has added to increased incidences of flooding in the city.

The rivers in Pune are monsoon fed so they are not full of water all the year round, they do have small flows due to the streams and springs that feed them. However, we have turned them into perennial rivers that overflow with untreated sewage from the city.  This has given the rivers in Pune the distinction of being the amongst the most polluted in the country, and exposed the population in the vicinity of rivers to health hazards. Similarly, this has had a detrimental impact on the river ecology and the biological diversity around the rivers.

The River Front Development (RFD) project has been proposed by the Pune Municipal Corporation (PMC) on the 44 kilometre stretch of the Mula Mutha river to deal with the poor state of the rivers and to prevent flooding in the city. The Detailed Project Report (DPR) of the RFD says that the project aims at preventing floods, reviving and rejuvenating rivers and developing a link between the river and its citizens. But the reality is very different. The RFD does not look at the river as a living ecosystem, it looks at it just as an economic resource and carrier of water.

The RFD project is more about artificial beautification of the river and not rejuvenation. It involves channelising and converting the river into canals by constructing walls (embankments) on the riverbed using cement, tar, paver blocks, rock pitching and other material. This will involve straightening of the river banks, which is an ecologically disastrous idea. Making the banks permanent with any such material, including concrete, is disastrous for the river.  

A river is a living system. It has different water velocity at different points; such as high velocity at the source, medium in the plains and very slow at the end of its journey. The river takes different paths, picking up sand, pebbles, silt and organic matter as it snakes through different landscapes.

The river bank is never a straight line and never permanent, but is flexible and depends on the river flow and forms a gradual gradient where water touches and mixes with the soil on its banks and supports different kinds of plants and animals depending on the habitat created.  

One of the main consequences of river straightening is that it can become shorter and steeper. We have already channelised the river - narrowing it further will result in faster flow and higher water levels when it rains heavily leading to floods. This can also lead to more erosion of the river banks and increase in siltation and turbidity affecting all animals living in and near the waters. This could lead to irreversible damage of the river ecosystem. River straightening can also reduce the river’s self-purification capacity because of shortened contact of the water, lesser oxygen mixing, which affects life in the river bed.

The RFD embankments will be constructed inside the floodlines, which will narrow the cross section of the river. The Water Resources Department has defined the floodlines for the river and warned the PMC not to reduce the cross section of the river. Apart from the embankments, four barrages are planned to be constructed as part of the project. These will stagnate the already polluted river leading to drop in oxygen levels. This will further deteriorate the biodiversity and allow invasive species like hyacinth to cover the water. We have seen this phenomenon in the Sabarmati RFD project.

The RFD project report mentions that the Central Water and Power Research Station (CWPRS) has given approval to this project after in depth hydrological study of the rivers. However, the CWPRS has categorically stated that they have not studied the RFD nor are they the approving authority. Both these letters are available with the PMC.

Environment clearance obtained for the RFD has been taken from the State Environment Impact Assessment Authority (SEIAA) but there are several questions arising in the approval.  

The DPR of the RFD has no mention of climate change in any of its sections, nor any consideration of the changing rainfall. Everyone knows how the rainfall is affecting rivers and floods.

Also, in the entire project, there is no mention of purifying or cleaning the rivers. How can there be rejuvenation without clean water, one wonders? This is not about river rejuvenation at all as there is no consideration for the river ecology anywhere in the report.

As citizen, we must take the blame for polluting our rivers, since we are responsible for the sewage. The PMC does not have the capacity to treat all the sewage generate by the city. As a result, our rivers are no longer living entities. For us, they are just bridges to be crossed. The RFD does not address the critical need to change human-river relations. The project will bring along huge earth moving equipment that will change the river bed, the banks and the course. Cement, tar, paver blocks and lawns will change her banks. In all this activity, there is no room for community participation. Is that what we want for our river? We really need to think hard.

The project consultant has the experience of the Sabarmati river model. However, comparing Pune River Front Project with the Sabarmati model is not at all appropriate as the hydrology and the topography of both the cities is totally different. For example, the Sabarmati river originates in the Aravalli mountains, where the rainfall is less than about 1000 mm. The Sabarmati flows through Ahmedabad and then goes to the Gulf of Khambat, so the RFD project is not at the source region, but near the mouth of the river, where it is slow and wide. This is not the case with the Mula-Mutha that originates from the Sahyadris where the rainfall can be more that 7000 mm. Pune city is near the source region of the rivers where the rivers are very fast. Moreover, we have huge dams a few kilometers upstream of the planned RFD project. The two situations cannot be comparable.

If we want to improve the state of rivers in Pune, we do not need a beautification project, we need to focus on improving the health of the rivers first. The rivers have been polluted for many years now and it is the primary responsibility of the Pune Municipal Corporation to keep them clean. The people of Solapur to support this demand as they are the ones who suffer when the polluted Mula Mutha water goes into the Ujani dam which feeds the city.

Even today, a large portion of Pune city is not supplied with drinking water. The sewage treatment capacity is woefully inadequate. When these critical functions in city administration are dysfunctional, how can the PMC spend 4400 crores on ‘beautification’? Why can’t they spend this money on making the city tanker-free and its water safe and secure?

Even if all other problems are taken care of, thinking of the river as a living entity and thinking of its ecology is the critical part here. Restoration should first involve cleaning the river and letting it be on its own, nature has a tremendous capacity to revive itself. We must prevent filth from entering into the river.

As citizens, we must connect and involve every Punekar in the care for the river. It is important to spread the knowledge of river ecology, its life-giving functions, and how it can be truly rejuvenated. Ecological restoration should be understood by citizens – they are the beneficiaries who are not involved in any decision making regarding the river. We are still following the colonial model here. Before the British took over, the Indians managed their own water.

The restoration and revival should look at the river as a living entity. Pune citizens would like to see a living river, with undisturbed banks not cemented ones and clean, free flowing waters that harbour rich flora and fauna. The River Front Development project does not meet any of these requirements in its present form.

 - Dr Gurudas Nulkar

gurudasn@gmail.com