engineering

Veligonda Project

Veligonda Project is a engineering 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 Veligonda Project rather than just read about it. In short: The Veligonda Project is an irrigation project located in Markapur, Markapuram district in Andhra Pradesh, India. When completed, the project will provide irrigational facilities to 447,000 acres and drinking water to 1.5 million people in 30 Mandals of fluoride and drought affected areas in Markapuram district, Nellore district and Kadapa district by diverting 43.5 TMC of floodwater from the Krishna River from fore…

Key takeaways

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

Reference excerpt

The Veligonda Project is an irrigation project located in Markapur, Markapuram district in Andhra Pradesh, India. When completed, the project will provide irrigational facilities to 447,000 acres and drinking water to 1.5 million people in 30 Mandals of fluoride and drought affected areas in Markapuram district, Nellore district and Kadapa district by diverting 43.5 TMC of floodwater from the Krishna River from foreshore of Srisailam Reservoir near Kollamvagu and proposed to store in Nallamalasagar Reservoir. The water for the project is drawn through two 18.8 km long tunnels across Nallamala hills. The project has been renamed to the "Poola Subbaiah Irrigation Project". It displaces around 20,946 families. The oustees have protested for enhanced compensation over the years and many have not received the compensation promised to them.

Design

The design includes two parallel tunnels of 18.8 km with 7 m (tunnel 1) and 9.2 m (tunnel 2) internal diameter and a 21.6 km flood flow canal for the water transmission system linking Srisailam reservoir to a reservoir called 'Nallamala Sagar'. Nallamala Sagar is planned to have 43.5 Tmcft live storage at 244 m msl full reservoir level and 214.3 m msl minimum draw down level. Full supply level to the tunnels from the Srisailam reservoir is 857 ft msl (261.2 m msl) and the sill level at tunnels water inlet is 840 ft msl (256.03 m msl). Irrigation to 1.19 lakh acres and drinking water to 4 lakh population in Markapuram district is planned as part of the first stage. In the second stage, irrigation to 3.28 lakh acres and drinking water to 11.25 lakh population in 30 mandals of Markapuram, Nellore and Kadapa districts is planned. Velagalapalle lift irrigation scheme, Papinenipalli lift irrigation scheme are also part of the project. About 2.58 TMC water to the mega industrial hub at Donakonda in Prakasam district and another 1.27 TMC water National Investment and Manufacturing Zone (NIMZ) in Pamuru and Pedacherlopalle mandals of Markapuram district are also parts of the expanded scope of the project. Conceived during the tenure of former chief minister N.T. Rama Rao and initiated in 1996, is estimated to cost ₹10,580 crore. With successive governments not giving required funds, the progress hit the roadblock. The contractors who bagged the project were also vexed due to difficulties in making the tunnels in the toughest terrain. The tunnel-1 which was 18.787 km long was completed for a length of 13.6 km by 2018. Although digging of just around 5 km is left to commission the project, the irrigation department could complete only around 2 km between 2019 and 2023. The project is being implemented by a double shielded tunnel boring machine to make the tunnel without disturbing wildlife in the Nagarjunsagar-Srisailam Tiger Reserve. 18.2 km (11.3 mi) of the first tunnel, and 11.02 km (6.85 mi) of the second tunnel digging were completed by January 2025. The first tunnel completed as of 14 January 2021. The remaining length of second tunnel is completed using drilling and blasting method by January 2025 albeit with 5 m diameter instead of 9.2 m paving the way to fill the project reservoir. As of August 2025, nearly Rs 4000 crores works are incomplete to fill the Nallamalla sagar reservoir. As of now in September 2025, the Government of AP is planning to complete the project on high priority by releasing all necessary funds. The expected date of reservoir filling is in August 2026 if all the pending works are completed as expected.

Veligonda Project – Land Acquisition and Rehabilitation Land Acquisition (LA) and Rehabilitation & Resettlement (R&R): The Veligonda Project involves significant land acquisition and resettlement measures. • Stage I: 23,468 acres were acquired out of a planned 24,931 acres, leaving 1,463 acres pending. • Stage II: 6,832 acres were acquired out of 10,101 acres, with 3,269 acres remaining. • A total of 11 villages are expected to be submerged and relocated to 7 designated R&R centres. • Of 7,321 project-displaced families, compensation has been provided to 2,565 families. • Infrastructure development has been completed in 4 of the 7 R&R centres, while work continues in the remaining 3. • The estimated cost for the R&R package and pending infrastructure works is ₹622.60 crore. • The estimated cost for land acquisition related to Canals Phase-I is ₹154.40 crore. Achievements during 2024–26: • Pending work bills amounting to ₹140 crore were cleared, enabling resumption of construction. • Protection works on the feeder canal costing ₹456 crore were sanctioned and completed in critical sections. • Bench excavation works were completed, and 97% of lining works in Tunnel-II were finished. • ₹300 crore was released towards R&R activities.

Project Timeline

References

Worked examples

Example 1 — a first encounter with Veligonda Project

Start with the simplest possible case. Write down what Veligonda Project claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Veligonda Project 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 Veligonda Project 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 Veligonda Project

In research: Veligonda Project appears in engineering 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 Veligonda Project 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: Veligonda Project is common in secondary-school and first-year university syllabi. It links to neighbouring topics Buildings and structures in Markapuram district, Irrigation in Andhra Pradesh, Water supply stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Veligonda Project 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 Veligonda Project in 20 minutes

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

Frequently asked questions

What is Veligonda Project in simple terms?

Why does Veligonda Project matter?

Because it connects several engineering 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 Veligonda Project?

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 Veligonda Project.