<figure><img width="1500" height="1010" src="https://superdesk-pro-c.s3.amazonaws.com/sd-nepalitimes/20221108181148/636a972d9c7e80680e05dcaajpeg.jpg" alt=""/><figcaption>Photo: UN-Habitat, the Center for Integrated Urban Development, and Lalitpur Metropolitan City</figcaption></figure>The <a href="https://www.nepalitimes.com/banner/monsoon-2019-deluge/" target="_blank" rel="noopener">2019 monsoon</a> was an erratic one. Sadly, erratic seems to be the new normal.There were storms in April, causing <a href="https://www.nepalitimes.com/editorial/flood-of-recrimination/" target="_blank" rel="noopener">floods</a>, and it seemed as if a large monsoon was on the way. This was followed by a couple of very dry months and delayed onset of the actual monsoon. From July it was as if the monsoon was playing catch up.Heavy rainfall creates havoc in the Kathmandu Valley, as streets turn into flowing sewage. Across the country, landslides and floods claim more lives and livelihoods. Now, <a href="https://www.nepalitimes.com/here-now/climate-health-emergency/" target="_blank" rel="noopener">dengue outbreaks</a> lengthen the list of monsoon dangers. The unjust and devastating impacts of flooding across the country have brought to the surface the failures of current development practices.One area that is often overlooked is the management of stormwater infrastructure. Poor maintenance, encroachment along riverbanks, improper waste disposal that clogs sewage outlets and rivers, and rampant enclosure of open land leave people vulnerable to threats that go beyond flooding. With its current wastewater infrastructure, even if the existing systems were fully functioning Kathmandu could handle less than 100 million litres per day of wastewater. <img width="300" height="182" src="https://superdesk-pro-c.s3.amazonaws.com/sd-nepalitimes/20221108181148/636a97309c7e80680e05dcabjpeg.jpg" alt="">Treatment plants are inadequate. While development-as-usual tends to focus on building bigger and better pipes, drainage is often overlooked, especially of stormwater after major rainfall events. Conventional practice transports stormwater to wastewater treatment systems. Yet, these systems are often overburdened and difficult to maintain, which causes sewage system overflows.Stormwater that overflows drains and runs down roads, streams and rivers carries with it more and more pollutants the farther it travels. Poorly managed stormwater is thus a major source of water pollution worldwide. Climate change projections are of more erratic and increased intensity storm events placing additional pressures on drainage infrastructure. Many cities are looking to overhaul this practice.Read also:<a href="http://archive.nepalitimes.com/article/nation/dont-wait-for-melamchi-nepal,3765" target="_blank" rel="noopener">Don't wait for Melamchi</a>, Tyle McMahon<a href="http://archive.nepalitimes.com/article/nation/renew-commitment-to-preserve-ancient-water-spouts,2931" target="_blank" rel="noopener">Going with the flow</a>, Liew Yu WeiThey have found that the costs of transforming drainage systems and building green infrastructure has significant benefits. Green infrastructure is a set of practices that utilise and revitalise ecosystems within and between watersheds, urban areas, neighbourhoods and households. Permeable pavement, rain gardens, bioswales, and household-level rainwater harvesting are common examples of green infrastructure solutions for stormwater.As cities elsewhere have found, green infrastructure saves. Financially, green infrastructure reduces the capital investment and operational costs of urban infrastructure. For cities like Philadelphia in the US, the cost of implementation has been four times lower than conventional stormwater drainage and wastewater treatment system upgrades. New York will see significant savings over the lifespan of its project, both in capital and operational costs.A review of over 400 green infrastructure initiatives by the <a href="https://www.asla.org" target="_blank" rel="noopener">American Society of Landscape Architects</a> showed that three-quarters of these investments were as cost-effective, or more so, than alternatives. Moreover, these examples were primarily on-site initiatives and not at the city-scale, which can be more cost-effective.Read also: <a href="https://archive.nepalitimes.com/article/nation/Melamchi-water-not-enough-for-everyone,3899">Not enough for everyone</a>, Sonia Awale<a style="background-color: #ffffff; font-size: 15px; letter-spacing: 0.01em;" href="https://www.nepalitimes.com/banner/nepal-villages-learn-to-cope-with-climate-crisis/" target="_blank" rel="noopener">Nepal villages cope with climate-induced floods</a>, Sonia AwaleIn Kathmandu, 150 billion litres of rain fall on rooftops and paved surfaces in one year. Spread over 365 days this would be 420 million litres daily, but during the monsoon rainfall is much more concentrated. A 50mm storm produces 5.5 billion litres of stormwater, more than 50 times what wastewater treatment systems could handle if they were completely functional. The same storm would produce 5,000l of water on a normal household rooftop, 15 times their daily wastewater production.If much of this water was retained and recharged on-site the cost reductions, additional groundwater supply available, and the reduced pollution of the Bagmati and its tributaries would be enormous.  <figure><img width="500" height="333" src="https://superdesk-pro-c.s3.amazonaws.com/sd-nepalitimes/20221108181148/636a97319c7e80680e05dcacjpeg.jpg" alt=""><figcaption> </figcaption></figure>Green infrastructure already exists in this growing city. Ancient water infrastructure and management systems continue to function in the Valley. Historians, archaeologists, engineers and architects have found that each area of the Valley has a water system that is not only suited to the local environment but that also integrates ecology with Newa social and cultural practices. These social and ecological interconnections between ponds, aquifers, porous brick surfaces, green space, channels and stone spouts still help to move, store and treat stormwater.Read also:<a href="https://www.nepalitimes.com/banner/bhaktapur-inundated/" target="_blank" rel="noopener">Bhaktapur Inundated</a>, Om Astha Rai and Bikram Rai<a href="https://archive.nepalitimes.com/page/resurrecting-bagmati-the-river" target="_blank" rel="noopener">Resurrecting the river,</a> Oskar FrelinSustainable development means moving away from cement solutions to promote and integrate green infrastructure in ways that suit Kathmandu’s social and ecological landscape. This could include protecting the city’s few remaining green spaces or providing meaningful support of local efforts to revitalise ancient water systems. It could also include reimagining rainwater harvesting as more than an alternative water source for households, but a city-wide infrastructure for sustainable stormwater management.It is time for the city and its residents to rethink stormwater management. It is time to look beyond dated development practices of more pipelines and channelised rivers towards those that are not only cost-effective and enhance local social and ecological systems, including restoring the Kathmandu Valley’s traditional water infrastructure.  Olivia Molden, PhD, has studied Kathmandu’s water infrastructure since 2013. Tyler McMahon is Co-Founder of <a href="https://smartpaani.com/" target="_blank" rel="noopener">SmartPaani</a> Pvt Ltd and President of <a href="http://oneplanetsolution.com/" target="_blank" rel="noopener">One Planet Solution LLC</a>.

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In Nepal’s weather, erratic is the new normal

Nepal has notched notable successes in conserving nature: five years of <a href="http://archive.nepalitimes.com/blogs/thebrief/2017/01/29/1000-days-of-the-rhino/" target="_blank">zero poaching of rhinos</a> and tigers in national parks, the <a href="https://www.nepalitimes.com/banner/how-many-tigers-in-nepal/" target="_blank">doubling of the wild tiger population</a> in 10 years and protection of plant species. However, roads, irrigation canals, transmission lines and even railways are now threatening to undermine these achievements. Conservationists say that balancing the need for economic growth with ecological protection will be even more challenging than combating poaching. As the country marks National Wildlife Week from 14-20 April, Nepal’s planners need to find ways to build new infrastructure without irreversibly harming the country's biodiversity. Read also: <a href="https://www.nepalitimes.com/?p=24334&amp;preview=true" target="_blank">Protecting the last home of the Spiny Babbler</a>, Carol Inskipp and Rupendra Karmacharya <div class="embed-block"><img src="https://superdesk-pro-c.s3.amazonaws.com/sd-nepalitimes/20221108111152/636a35359c7e80680e048299jpeg.jpg" alt="" width="1400" height="933"></div> Now that Nepal has domestic poaching under control, it needs to focus on controlling the transit of wildlife smuggling. Nepal is a hub for trafficking of tiger, rhino and <a href="https://www.nepalitimes.com/banner/protecting-pangolins-from-being-eaten-to-extinction/" target="_blank">pangolin parts</a> from India and Africa. Even live chimpanzees and birds have been found at Kathmandu airport. Nepal is now a victim of its own success in conservation. With poaching controlled, protected areas are now getting overcrowded with wildlife, leading to the threat of disease and an increase in <a href="https://archive.nepalitimes.com/article/Nepali-Times-Buzz/more-rhinos-means-more-encounter,4045" target="_blank">human-animal conflict</a>. Read also:&nbsp; <a href="https://archive.nepalitimes.com/article/nation/habitat-destrcution-of-tiger-in-Tarai,3423" target="_blank">Allow tigers to roam more freely</a>, Om Astha Rai <a href="https://www.nepalitimes.com/banner/its-a-jungle-out-there/" target="_blank">It's a jungle out there</a>, Kunda Dixit <a href="https://archive.nepalitimes.com/article/Nepali-Times-Buzz/more-rhinos-means-more-encounter,4045" target="_blank">More rhinos means more encounters</a>, Alex Dudley <div class="embed-block"><img src="https://superdesk-pro-c.s3.amazonaws.com/sd-nepalitimes/20221108111152/636a35389c7e80680e04829ajpeg.jpg" alt="" width="1500" height="1083"></div> <div class="embed-block"><img src="https://superdesk-pro-c.s3.amazonaws.com/sd-nepalitimes/20221108111152/636a35359c7e80680e048299jpeg.jpg" alt="" width="1400" height="933"></div> In addition, climate change is leading to weather extremes that have aggravated the problems of water scarcity, flash floods and prey decline. Even though rhinos are no longer poached, for example, there has been a sharp increase in fatalities, with 41 dead in the last 9 months alone in Chitwan. Besides old age, most have died of disease, fights with other rhinos, or poisoning. Last month, a rhino died in Sauraha after falling into the septic tank of a hotel. There has also been an increase in <a href="https://www.nepalitimes.com/here-now/how-humans-can-live-with-wild-elephants/" target="_blank">wild elephants</a> and tigers entering human settlements in search of food due to habitat encroachment in their migration corridors. Last year, <a href="http://archive.nepalitimes.com/article/editorial/deep-water,3883" target="_blank">flash floods in Chitwan</a> washed away rhinos: 12 of them had to be rescued and brought back from India. However, the biggest threat to Nepal’s wildlife in the post-poaching era is new infrastructure crisscrossing nature reserves. Major transmission lines have been built or are planned through national parks, the new postal highway slices through nature reserves, new irrigation canals such as Babai, Sikta and Ranijamara have bifurcated areas frequented by wildlife, and the new East-West railroad running parallel to the E-W Highway will fragment many national parks. <div class="embed-block"><img src="https://superdesk-pro-c.s3.amazonaws.com/sd-nepalitimes/20221108111152/636a35389c7e80680e04829ajpeg.jpg" alt="" width="1500" height="1083"></div> Nature reserves and national parks make up one-fourth of Nepal’s area. With infrastructure building spree currently underway, experts say the country will soon lose 200,000 hectares of forests. This will result in rampant habitat destruction, and increase in road kills and deaths of animal that fall into irrigation canals, which account for the highest number of wildlife fatalities. New roads have also brought haphazard urbanisation and pollution: a growing number of ungulates and carnivores have been found to have died after ingesting plastic or chemicals. One of the biggest sources of habitat destruction will be the much talked about <a href="https://www.nepalitimes.com/banner/does-nepal-need-a-4th-international-airport/" target="_blank">Nijgad airport near Parsa National Park</a>, which will decimate one of the last remaining hardwood forests in the eastern Tarai, removing a major migratory corridor for wild elephants. “The government has always prioritised infrastructure, which while essential for development, is a major threat to conservation,” says Bishnu Prasad Shrestha of the Department of National Parks and Wildlife Conservation (DNPWC). “Our preoccupation therefore is with mitigation measures on the existing roads and finding out ways to make new infrastructure safer for wildlife. If we do not act now, it will be too late. Our tourism industry and economy depend on our conservation efforts.” <div class="embed-block"><img src="https://superdesk-pro-c.s3.amazonaws.com/sd-nepalitimes/20221108111152/636a353b9c7e80680e04829bjpeg.jpg" alt="" width="800" height="1200">The Sikta Irrigation Canal has several overpasses for wild animals</div> DNPWC and WWF Nepal organised a regional workshop this month in Kathmandu to find ways to promote sustainable green infrastructure. Some of the key recommendations include the study of wildlife movement before mapping the alignment of linear infrastructure, like roads, railways, canals and transmission lines. The good news is that planners at the Department of Roads think the country does not need too many more roads, the existing strategic highways and feeder roads need to be upgraded. There have been initiatives like installing CCTV cameras to monitor vehicles, enforcing time cards on highways that traverse national parks, as well as building over and under-passes so wildlife can cross highways, irrigation canals or train tracks. DNPWC is now planning five canopy bridges for arboreal species in Banke, and contractors have agreed to build new underpasses while widening the Daune-Narayangad section of the East-West Highway. The route for the proposed <a href="http://archive.nepalitimes.com/article/nation/planned-new-east-west-railroad-and-expressway-threaten-the-Chitwan-National-Park,1079" target="_blank">E-W Electric Railway</a> that would have cut through Chitwan National Park has been changed after protests from activists. But these isolated cases will not be sufficient to minimise the nationwide threat to nature reserves from infrastructure in the long run. Experts say wildlife friendly infrastructure based on biodiversity assessment and species movement is a must. Nabin Gopal Baidhya of the non-government Wildlife Conservation Nepal thinks there may be too much emphasis on the impact of roads on national parks. He says: “We have to go beyond the protected areas and study the condition of forests outside parks. How can villages and community forests work with road contractors to protect trees? Ultimately we have to find a way for humans and nature to safely co-exist.”

green-infrastructure

In Nepal’s weather, erratic is the new normal

In conservation, Nepal is not out of the woods yet