YAMUNA FLOOD PLAINS
1. Context
Battered by heavy rains, the Yamuna looks slow, sluggish, and swollen. Last week, the water levels hit a yearhigh, gushing through elite neighborhoods built close to the floodplains. Waters advanced towards the Taj Mahal for the first time in half a century. More than 25,500 people were evacuated and ferried to rescue camps in a brown stream of waste; many of them lived in make-shift lowlying slum dwellings next to the river.
2. About Yamuna River
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- The Yamuna River is one of the most significant and sacred rivers in India. It is the largest tributary of the Ganges River and plays a vital role in the cultural, historical, and ecological landscape of the country.
- The river holds immense importance in Hindu mythology and is revered as a goddess, Yamuna Devi, by millions of people.
- Originating from the Yamunotri Glacier in the Uttarakhand state of northern India, the Yamuna River flows through several states, including Uttar Pradesh, Haryana, and Delhi, before eventually merging with the Ganges at the Triveni Sangam in Allahabad (now Prayagraj). The Yamuna's total length is approximately 1,376 kilometers (855 miles).
- The river has been a witness to numerous historical events and has served as the lifeblood of several ancient Indian civilizations.
- Cities like Delhi, Mathura, and Agra owe their prosperity and cultural heritage to the Yamuna's presence. The river has inspired poets, artists, and spiritual seekers throughout history.
- However, over the years, the Yamuna has faced severe environmental challenges due to pollution, over-extraction of water, and encroachments on its banks.
- Urbanization, industrialization, and agricultural practices have contributed to the degradation of water quality and the decline in the river's flow. Waste discharge, including untreated sewage and industrial effluents, is a major concern and has significantly impacted the river's health.
- The government and various organizations have undertaken initiatives to clean and rejuvenate the Yamuna River, but progress has been slow and challenging due to the scale of the issue and the involvement of multiple stakeholders.
- Despite these challenges, the Yamuna River continues to be a lifeline for millions of people who depend on it for their daily needs, including drinking water, irrigation, and industrial use.
- Additionally, the river remains an essential aspect of religious and cultural practices, with numerous festivals and rituals performed on its banks.
- Yamuna is also home to various aquatic species and supports diverse ecosystems. The river and its floodplains are vital habitats for several bird species, and they play a crucial role in maintaining the ecological balance of the region.
- Efforts to restore and protect the Yamuna are ongoing, and public awareness about the importance of the river's conservation has been increasing steadily.
- Sustainable practices, stricter regulations, and community involvement are essential components of any successful restoration plan.
- The preservation of the Yamuna River is not only crucial for the people of India but also for the entire world as it symbolizes the harmony between nature and culture.
- As we move forward, it is imperative to treat the Yamuna with the respect and care it deserves to ensure its well-being for future generations.
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Image Source: The Hindu
3. What are Flood Plains?
- Floodplains are low-lying areas adjacent to rivers and streams that experience periodic flooding during heavy rains or when water levels rise.
- These natural landscapes play a crucial role in maintaining the ecological balance of river systems and have various ecological, environmental, and social significance.

4. Ecological Functions of Floodplains:
- Flood Regulation: Floodplains serve as a buffer during floods, reducing the peak flow and preventing severe inundation downstream.
- Groundwater Recharge: Floodplains allow rainwater and floodwaters to seep into the ground, replenishing groundwater sources and maintaining river flow during dry periods.
- Habitat Creation: The dynamic nature of floodplains creates a variety of habitats, attracting a wide range of plants and animals. They offer essential breeding and nesting sites for many species.
- Nutrient Cycling: Floodplains facilitate nutrient cycling by trapping organic matter and sediments from the river, which then enriches the soil and supports plant growth.
5. Importance of the Yamuna River:
- The Yamuna River is of immense cultural, historical, and ecological significance in India.
- It has been revered as a goddess, Yamuna Devi, in Hindu mythology.
- The river serves as a lifeline to five Indian states, providing water for irrigation, drinking, and industrial use.
- The floodplains of the Yamuna act as natural reservoirs, slowing down water runoff during floods and replenishing groundwater, which helps in maintaining the city's water supply.
- It played a crucial role in shaping the growth of Delhi, ensuring a constant water supply and preventing the city from facing famine or floods.
6. Challenges Faced by the Yamuna River:
- Rapid urbanization and haphazard construction activities have encroached upon the floodplains, restricting the river's natural flow and flood-carrying capacity.
- Pollution from untreated sewage and industrial effluents has severely degraded the water quality of the Yamuna.
- Lack of proper housing and lax regulations have led to the growth of slums and settlements on the floodplains, contributing to the loss of agricultural land and ecosystem disruption.
- Climate change has intensified rainfall, leading to more frequent and severe floods, which the river's altered condition struggles to manage.
7. Impact on River and Society:
- Encroachments on the floodplains have constricted the river's expansion during floods, leading to devastating flash floods with increased severity and height.
- Loss of floodplains and reduction of storage capacity have disrupted the natural hydrological cycle, impacting sediment transport and the riverine ecosystem.
- People living on the floodplains, including farmers and migrant workers, face eviction due to conflicting policies aiming for ecological rejuvenation.
- The absence of proper floodplain zoning in city planning exacerbates conflicts between development and nature.
8. Addressing the Challenges:
- Authorities need to recognize the importance of floodplains and the river's right to expand during floods.
- Climate-resilient infrastructure, improved drainage systems, and green areas can help mitigate flood impacts and preserve the river's health.
- Policymakers should focus on sustainable development while protecting the river's natural flow and ecological balance.
9. Yamuna Floodplain: A Protected Area Under Threat
- The Yamuna River's floodplain was declared a protected area free from construction in the Delhi Masterplan of 1962. The Central Ground Water Authority also recognized its significance for groundwater management in 2000.
- However, the draft Master Plan for Delhi 2041 divided the city into 18 zones, designating Yamuna's floodplains as 'Zone O,' consisting of a river zone (active floodplain) and a riverfront (where regulated construction is allowed). Unfortunately, lax implementation has led to gross abuse of the floodplains and riverbeds.
- A 2020 report by the South Asia Network on Dams, Rivers, and People (SANDRP) highlighted the construction of numerous bridges, embankments, and guide bunds, fragmenting the floodplain and promoting encroachments.
- An Expert Committee formed in 2012 to examine the Riverfront Development Scheme warned against construction on floodplains. The proposed Yamuna Riverfront Development (YRDF) plan, including biodiversity parks and recreational activities, falls within the active floodplain, posing risks to topography, increasing pollution, and affecting flood-carrying capacity.
- Encroachments on the floodplains hinder the exchange between the river and the groundwater aquifers formed by sediment layers. As a result, the river is unable to transport floodwaters downstream during monsoons, impacting the ecosystem and soil deposition along its banks.
- Preserving the Yamuna's floodplains is essential to maintain ecological balance, groundwater recharge, and flood protection. Ensuring proper implementation of protective measures and limiting construction activities on floodplains can help safeguard this vital natural resource for future generations.
For Prelims: Yamuna Flood plain, Yamuna River, Yamuna Riverfront Development (YRDF) plan, Yamunotri Glacier in the Uttarakhand state, Master Plan for Delhi 2041, and South Asia Network on Dams, Rivers, and People (SANDRP).
For Mains: 1. Analyze the major challenges and threats faced by the Yamuna River, including pollution, encroachments, and over-extraction of water. (250 words).
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Previous year questions1. Consider the following tributaries of River Yamuna and arrange them from West to East : (UPSC 2020)
1. Betwa
2. Ken
3. Sindh
4. Chambal
Select the correct answer from the codes given below.
A. 4, 3, 1 and 2
B. 1, 2, 3 and 4
C. 3, 2, 1 and 4
D. 2, 3, 1 and 4
Answer: A
2. Consider the following pairs: (UPSC 2019)
Glacier River
1. Bandarpunch Yamuna
2. Bara Shigri Chenab
3. Milam Mandakini
4. Siachen Nubra
5. Zemu Manas
Which of the pairs given above are correctly matched?
A. 1, 2 and 4
B. 1, 3 and 4
C. 2 and 5
D. 3 and 5
Answer: A
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Source: The Hindu