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Andhra Pradesh Physiography

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SwaPrep presents · A chapter in Geography

Andhra Pradesh Physiography

From a broken wall of hills to the widest deltas in India — this is the journey across the land whose shape decides where Andhra Pradesh farms, mines, and lives.

7 acts · 14 scenes · scroll to play↓

I

The Shape of a State

The bifurcation2014 CE

A state redrawn, a geography retained

On June 2, 2014, Andhra Pradesh was bifurcated under the AP Reorganisation Act, losing Hyderabad to Telangana. The residual state kept 13 districts — reorganized into 26 in 2022 — and, more importantly, kept its geographic wealth: an extensive coastline, the great river deltas, and a mineral-rich interior. What remained is a land of extremes, stretching from the tribal hills of Uttarandhra to the drought-prone Rayalaseema plateau and the fertile coastal deltas between them.

Marks-winning facts

  • Bifurcated June 2, 2014, under the AP Reorganisation Act — Hyderabad went to Telangana
  • 13 districts at bifurcation → reorganized to 26 districts in 2022
  • AP is India's 8th largest state: 1,62,975 sq km
  • Coastline: 974 km — the 2nd longest in India
The three terrains

One state, three different worlds

All of Andhra Pradesh resolves into three physiographic regions. The Coastal Plains are low-lying alluvial flats covering roughly 35 per cent of the state, rarely rising above 100 metres. The Eastern Ghats run through the middle as discontinuous hill ranges — about 25 per cent of the area, climbing from 300 to 1,500 metres. And the Deccan Plateau of Rayalaseema, an undulating semi-arid tableland at 300 to 600 metres, takes the largest share at around 40 per cent.

Marks-winning facts

  • Coastal Plains — ~35% of area, 0–100 m, low alluvial plains
  • Eastern Ghats — ~25% of area, 300–1,500 m, discontinuous hill ranges
  • Deccan Plateau (Rayalaseema) — ~40% of area, 300–600 m, semi-arid
  • Physiography drives AP's agriculture, economy, and settlement patterns

II

The Wall of Hills

The Eastern Ghats

A wall the rivers broke three times

The Eastern Ghats run some 1,750 kilometres along peninsular India, and Andhra Pradesh holds about 40 per cent of their total area — the largest share of any state. Yet in AP this wall is not continuous: the Godavari, the Krishna and the Pennar have each cut clean through it, leaving a chain of broken ranges instead of an unbroken ridge. The hills average 600 to 900 metres and wear a cover of dry deciduous forest.

Marks-winning facts

  • Eastern Ghats total length: ~1,750 km; AP holds ~40% of their area
  • Discontinuous in AP — broken by the Godavari, Krishna, and Pennar valleys
  • Average elevation 600–900 m; predominantly dry deciduous forest
The ranges

Six ranges, six personalities

Each broken segment of the wall has its own name and character. The Nallamala Hills of Kurnool, Nandyal and Prakasam hold the Srisailam temple and India's largest Tiger Reserve. The Seshachalam Hills of Tirupati and Annamayya carry Tirumala, a UNESCO Biosphere Reserve, and the precious Red Sanders. Further north, the Ananthagiri Hills around Araku in Visakhapatnam grow coffee and hide the Borra Caves, while the Palakonda range watches over the tribal country of Srikakulam and Vizianagaram. The Velikonda range walls the eastern flank of the Cuddapah basin, and Horseley Hills in Chittoor rises to about 1,265 metres as a hill station.

Marks-winning facts

  • Nallamala (Kurnool, Nandyal, Prakasam) — Srisailam temple; India's largest Tiger Reserve
  • Seshachalam (Tirupati, Annamayya) — Tirumala; UNESCO Biosphere Reserve; Red Sanders
  • Ananthagiri (Visakhapatnam/Araku) — coffee plantations; Borra Caves
  • Velikonda (Kadapa, Nellore) — eastern flank of the Cuddapah basin
  • Palakonda (Srikakulam, Vizianagaram) — northern AP, tribal area; Horseley Hills (Chittoor) ~1,265 m
The summit

Jindhagada — the roof of Andhra Pradesh

The state's highest ground gathers in its tribal northeast. Jindhagada Peak in ASR district stands at about 1,690 metres — the highest point in Andhra Pradesh — with Arma Konda just behind it at roughly 1,680 metres in the same district. Galikonda in Visakhapatnam reaches about 1,643 metres, while far to the south Horseley Hills tops out near 1,265 metres and the Seshachalam range near 1,000.

Marks-winning facts

  • Highest point in AP: Jindhagada Peak, ~1,690 m, ASR district — frequently asked
  • Arma Konda ~1,680 m (ASR); Galikonda ~1,643 m (Visakhapatnam)
  • Horseley Hills ~1,265 m (Chittoor); Seshachalam ~1,000 m (Tirupati)

III

The Fertile Shore

The coastal plain

The widest coastal plain in India

Between the hills and the sea runs the Andhra Plain — the Circars — stretching from Srikakulam in the north to Nellore in the south. At the deltas it spreads 100 to 130 kilometres inland, making it the widest coastal plain in India. Built grain by grain from the alluvium of the Godavari, the Krishna and the Pennar, it is extremely fertile and forms the state's main rice-growing belt.

Marks-winning facts

  • Width 100–130 km — the widest coastal plain in India, at the deltas
  • Runs Srikakulam → Nellore; known as the Andhra Plain / Circars
  • Formed by alluvial deposits of the Godavari, Krishna, and Pennar
  • Extremely fertile — AP's main rice-growing belt
The Godavari delta

Where the Godavari splits in two

The Godavari builds one of India's largest deltas across East Godavari and Konaseema districts, splitting into the Gautami Godavari in the north and the Vasishta Godavari in the south. At its seaward edge stands the Coringa mangrove forest, the second largest in India. This is the state's primary rice and coconut country.

Marks-winning facts

  • One of India's largest deltas — East Godavari and Konaseema districts
  • Splits into Gautami Godavari (north) and Vasishta Godavari (south)
  • Coringa mangrove forest — 2nd largest in India
  • Primary rice and coconut area
Krishna and Pennar

A historic port, a lake between two deltas

The Krishna delta spreads across Krishna and NTR districts with parts of Guntur and West Godavari — fertile rice and sugarcane land anchored by Machilipatnam, the historic port. Between the Krishna and Godavari deltas lies Kolleru Lake, a Ramsar site. Far to the south, the smaller Pennar delta in SPSR Nellore ends at Pulicat Lake, the second largest brackish lagoon in India, where aquaculture is a significant livelihood.

Marks-winning facts

  • Krishna delta: Krishna, NTR, parts of Guntur and West Godavari — rice and sugarcane
  • Machilipatnam — the delta's historic port
  • Kolleru Lake sits between the Krishna and Godavari deltas (Ramsar site)
  • Pennar delta (SPSR Nellore): Pulicat Lake — 2nd largest brackish lagoon in India; aquaculture

IV

The Dry Heart

Rayalaseema

The plateau that waits for rain

Inland from the hills, the journey climbs onto the Deccan Plateau of Rayalaseema — the interior districts of Kurnool, Nandyal, Anantapur, Sri Sathya Sai, YSR Kadapa, Annamayya and Chittoor. At 300 to 600 metres, this is semi-arid country receiving only 550 to 750 millimetres of rain a year. Anantapur, at about 550 millimetres, is the driest district in Andhra Pradesh.

Marks-winning facts

  • Rayalaseema plateau: 300–600 m elevation, semi-arid, 550–750 mm rainfall
  • Districts: Kurnool, Nandyal, Anantapur, Sri Sathya Sai, YSR Kadapa, Annamayya, Chittoor
  • Anantapur — the driest district in AP (~550 mm)
The ancient basin

A crescent of rock 1.9 billion years old

Beneath Rayalaseema lies the Cuddapah Basin, a crescent-shaped formation about 1.9 billion years old — one of the oldest geological structures in India — rich in limestone, barytes and uranium. The plateau's soils tell the same two-tone story: black cotton soil along the Guntur–Kurnool belt, and red soil across most of the rest of Rayalaseema.

Marks-winning facts

  • Cuddapah Basin: ~1.9 billion years old, crescent-shaped — among India's oldest formations
  • Minerals: limestone, barytes, uranium
  • Black cotton soil in the Guntur–Kurnool belt; red soil over most of Rayalaseema

V

Waters and Earth

The lakes

Four waters, four stories

Four water bodies define the state's map. Kolleru, between West Godavari and Krishna, is the largest freshwater lake in AP and a Ramsar site. Pulicat, shared between Nellore and Tamil Nadu, is India's second largest brackish lagoon. And on the Krishna river stand the two great man-made waters: the Srisailam Reservoir between Nandyal and Kurnool with its massive hydroelectric capacity, and Nagarjuna Sagar between Guntur and Palnadu, one of the largest man-made lakes anywhere.

Marks-winning facts

  • Kolleru — largest freshwater lake in AP; Ramsar site (West Godavari–Krishna)
  • Pulicat — brackish lagoon, 2nd largest in India (Nellore/Tamil Nadu)
  • Srisailam Reservoir (Nandyal–Kurnool) — Krishna river, massive hydroelectric
  • Nagarjuna Sagar (Guntur–Palnadu) — one of the largest man-made lakes
The soils

Five soils that decide five harvests

The land's character changes with its soil. Alluvial soil in the coastal deltas grows rice, sugarcane and coconut, while the black regur of the Krishna–Guntur belt and Kurnool carries cotton, chillies and tobacco. Red soil — covering most of the Rayalaseema interior — supports millets, groundnut and pulses. Laterite in the Visakhapatnam hills allows limited coffee and pepper, and the sandy coastal strip yields coconut and cashew.

Marks-winning facts

  • Alluvial (coastal deltas) — rice, sugarcane, coconut
  • Black/Regur (Krishna–Guntur belt, Kurnool) — cotton, chillies, tobacco
  • Red (most of Rayalaseema) — millets, groundnut, pulses
  • Laterite (Visakhapatnam hills) — coffee, pepper; Sandy (coastline) — coconut, cashew

VI

Three Worlds, One State

The regions

Uttarandhra, Coastal Andhra, Rayalaseema

Geography hardens into identity in AP's three cultural regions. Uttarandhra — Srikakulam, Vizianagaram, Parvathipuram Manyam, ASR, Visakhapatnam and Anakapalli — is the hilly, tribal northeast living on rice and fishing. Coastal Andhra, the belt from Kakinada to Nellore, holds the fertile deltas: the rice bowl and the most urbanized stretch of the state. Rayalaseema, the eight districts from Kurnool to Chittoor, is the semi-arid, drought-prone plateau whose wealth lies in its minerals.

Marks-winning facts

  • Uttarandhra — 6 districts, hilly NE, tribal; rice and fishing
  • Coastal Andhra — Kakinada-to-Nellore belt; fertile deltas, rice bowl, most urban
  • Rayalaseema — 8 districts, Kurnool to Chittoor; semi-arid, drought-prone, mineral-rich

VII

The Exam Map

Exam tactics

Match the hill to the district, the delta to its lake

APPSC tests this chapter through matchings, so memorize the pairs. Hill ranges to districts: Nallamala with Kurnool and Nandyal, Seshachalam with Tirupati, Ananthagiri with Visakhapatnam's Araku. Deltas to their signatures: Godavari with the Coringa mangroves, Krishna with Kolleru Lake, Pennar with Pulicat Lake. Jindhagada Peak at about 1,690 metres in ASR district is the most frequently asked single fact, and the Cuddapah Basin — 1.9 billion years old, holding limestone, barytes and uranium — anchors the geology questions. For comparatives, keep the three-region contrast sharp: Rayalaseema dry and mineral-rich, Coastal Andhra fertile and urban, Uttarandhra hilly and tribal.

Marks-winning facts

  • Hill–district matching: Nallamala=Kurnool/Nandyal · Seshachalam=Tirupati · Ananthagiri=Vizag/Araku
  • Delta–feature matching: Godavari=Coringa mangroves · Krishna=Kolleru · Pennar=Pulicat
  • Highest peak: Jindhagada (~1,690 m), ASR district — frequently asked
  • Cuddapah Basin: 1.9 billion years; limestone, barytes, uranium
  • Comparative frame: Rayalaseema (dry/minerals) vs Coastal Andhra (fertile/urban) vs Uttarandhra (hilly/tribal)

End of chapter

Now make it yours

Hill ranges, peaks, deltas, lakes, and district links — the matching tables in the full notes are where the marks live. Open them, then test yourself.

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