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Johad

Johad is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Johad rather than just read about it. In short: A johad, also known as a pokhar or a percolation pond, is a community-owned traditional harvested rainwater storage wetland principally used for effectively harnessing water resources in the states of Haryana, Rajasthan, Punjab, Delhi and western Uttar Pradesh of North India, that collects and stores water throughout the year, to be used for the purpose of recharging the groundwater in the nearby water wells, washin…

Johad — main illustration
Johad — illustration

Key takeaways

  • Johad belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Johad to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Johad from memory before moving on to harder problems.

Reference excerpt

A johad, also known as a pokhar or a percolation pond, is a community-owned traditional harvested rainwater storage wetland principally used for effectively harnessing water resources in the states of Haryana, Rajasthan, Punjab, Delhi and western Uttar Pradesh of North India, that collects and stores water throughout the year, to be used for the purpose of recharging the groundwater in the nearby water wells, washing, bathing and drinking by humans and cattle. Some johads also have bricked or stones masonry and cemented ghat (series of steps and/or ramp). Rainwater fills the pit. These are connected to other small pits like this. The extra rainwater fills in the smaller pits. They are then used for cleaning, drinking and washing purposes. Johads also cater to resident and seasonal migrant birds as well as wildlife animals from the nearby forest. State fisheries departments also promote the use of these johads for raising fishes on contract basis for commercial fishing. Johads are often seen surrounded by embankment, with water wells and trees around them. In many parts, especially in the dry state of Rajasthan, the annual rainfall is very low (between 450 and 600 mm) and the water can be unpleasant to drink. Rainfall during July and August is stored in johads and used throughout the year. Johad in Haryanvi language and Rajasthani language are also called sarovar, taal and talab in Hindi language, and water pond or lake in English. A similar structure to a johads, called a khadin, consists of a very low and long earthen bund in the Jaisalmer district. Over 4,500 working johads in Alwar district and surrounding districts Rajasthan were revived by the NGO Tarun Bharat Sangh by Rajendra Singh. Haryana formed the Haryana State Waterbody Management Board to rejuvenate and manage 14,000 ponds in the state, including the development of 60 lakes in Delhi NCR falling within the state. Smaller cemented water tanks called taankas in parts of Rajasthan are also sometimes mistakenly referred to as johads. Concretized rain-fed taanka and canal-fed diggi are different from the johads.

Religious significance

Matsya Purana, a Hindu text, has a Sanskrit shloka (hymn), which explains the importance of reverence of ecology in Hinduism. It states, "A pond equals ten wells, a reservoir equals ten ponds, while a son equals ten reservoirs, and a tree equals ten sons." Gramadevata (village deity) temples and Jathera shrines of pitrs for ancestral worship are usually found on the banks of johads, which also have ghats for the sacred rituals, bathing, and other religious, social, and practical human activities.

Johad wetlands

Type of construction Johads can be of several types, such as dug-out in areas to which rainwater can be easily channeled. Alternatively, simple mud-and-rubble-barrier check dams may be built across the contour of a slope with a high embankment on three sides, while the fourth side is left open for the rainwater to enter. These catch and conserve rainwater, leading to improved percolation and groundwater recharge. They are very common in most villages of states of Haryana, Rajasthan, Uttar Pradesh, and the Thar desert of Rajasthan in India.

Rejuvenation

2019 Atal Bhujal Yojana (Atal groundwater scheme), a five-year (2020–25) scheme costing INR 6 billion (US$85 million) for managing demand with village panchayat-level water security plans entailing johad rejuvenation (wetland) and groundwater recharge, was approved for implementation in 8,350 water-stressed villages across 7 states, including Haryana, Rajasthan, Gujarat, Madhya Pradesh, Uttar Pradesh, Karnataka, and Maharashtra.

Haryana Johads rejuvenation

In 2007, Haryana Irrigation Department spent INR435.26 crore (INR4.3 billion or US$7 million) to renovate and restore water bodies in the state for the conservation of water, recharging of ground water, preservation of environment, and enhancement of tourism. A study by the Panjab University found 60 fish species of 19 families, 11 commercial and 6 exotic species, in the water bodies of Haryana. Water bodies remain under risk from encroachment, shrinking of catchment area, and pollution. In 2010, India's first-ever diatom databasing was done in ten different water bodies at ten different stations in Haryana. A 2015 study of 24 water bodies of Haryana found 39 morphologically different types of diatoms. In 2016, the Government of Haryana announced a plan to map the district-wise map of water flow and to create a database of all water bodies within the state. These water bodies have contributed to the economic development through fisheries in the landlocked state of Haryana. Haryana ranks second in India in terms of the average annual fish production per unit area in the country, with 7000 kg per hectare. Fish production has increased from 600 tonnes in 1966-67 at the time of formation of Haryana to 121000 t of fish during the year 2015–16, providing a livelihood to over 30000 families in the fisheries sector. On 1 November 2017, Chief Minister of Haryana Manohar Lal Khattar announced that the Government of Haryana will form the Haryana State Waterbody Management Board to rejuvenate and manage 14,000 ponds in Haryana by digging the silt out every year. This includes the development of 50 to 60 lakes in the National Capital Region falling within the Haryana state. As of 2020, the Government of Haryana is reviving various johads of Gurugram. In June 2020, for the revival of ponds at Gwal Pahari, estimates were being prepared to undertake the erection of a boundary wall, building a walking track around the johad, clearing bushes, planting trees, and to connect the seasonal rivulet to the johad to ensure that it retains water year around. In 2021, Haryana will undertake a survey based on 1957 revenue records and satellite surveys to identify the ponds, remove encroachments, and in the first phase will rejuvenate 1868 ponds by the end of 2022 to use water from the ponds to irrigate 50 acres per pond, for a total of 93400 acres.

Rajasthan Johads rejuvenation

… excerpt ends here. Continue reading the full article.

Illustrations

Johad: Nadi (small johad) in Laporiya village of Rajasthan
Nadi (small johad) in Laporiya village of Rajasthan
Johad: Johad at Rithal village of Rohtak district of Haryana
Johad at Rithal village of Rohtak district of Haryana
Johad: Johad at Rithal village of Rohtak district of Haryana
Johad at Rithal village of Rohtak district of Haryana
Johad: Rajendra Singh, founder of Tarun Bharat Sangh NGO explaining the use of johad to the students of TERI University in Alwar district of Rajasthan
Rajendra Singh, founder of Tarun Bharat Sangh NGO explaining the use of johad to the students of TERI University in Alwar district of Rajasthan
Johad: View of a tanki in Thathawata village in Rajasthan
View of a tanki in Thathawata village in Rajasthan

Worked examples

Example 1 — a first encounter with Johad

Start with the simplest possible case. Write down what Johad claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Johad before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Johad ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Johad

In research
Johad appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Johad in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Johad is common in secondary-school and first-year university syllabi. It links to neighbouring topics Architecture of Rajasthan, Drinking water, Irrigation in India, so understanding it makes those chapters shorter.
In everyday life
Look for Johad outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Johad in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Johad means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Johad out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Johad in simple terms?

A johad, also known as a pokhar or a percolation pond, is a community-owned traditional harvested rainwater storage wetland principally used for effectively harnessing water resources in the states of Haryana, Rajasthan, Punjab, Delhi and western Uttar Pradesh of North India, that collects and stor…

Why does Johad matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Johad?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Johad.

Tags

  • Architecture of Rajasthan
  • Drinking water
  • Irrigation in India
  • Rainwater harvesting
  • Water conservation in India

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