Regional Geography of India and Andhra Pradesh
What this domain tests
Regional geography of India and Andhra Pradesh tests physiographic divisions, drainage, climate, soils, vegetation, minerals and human patterns at national and state scale. Expect locational questions and comparisons between coastal Andhra, Rayalaseema and the Eastern Ghats.
Core rules
- India's physiography: Himalayas, Indo-Gangetic Plain, Peninsular Plateau, coastal plains and islands. The Peninsular Plateau is old, stable and mineral-rich.
- Andhra Pradesh has three broad regions: Coastal Andhra (delta plains and coast), Rayalaseema (plateau and drought-prone uplands) and the Eastern Ghats (hills such as Nallamala and Tirumala). The state has 26 districts since 2022.
- Rivers: Godavari and Krishna build the central deltas; Pennar, Tungabhadra, Vamsadhara and Nagavali drain other parts. Polavaram is on the Godavari; Nagarjuna Sagar and Prakasam Barrage are on the Krishna.
- Rainfall decreases inland: coastal areas receive about 1,000 mm, Rayalaseema about 600–700 mm. Mango, chilli, tobacco, cotton, rice and aquaculture are important.
- Minerals: barytes at Mangampeta (Kadapa district) is a world-class deposit; limestone, mica and graphite also occur.
Worked example
A district has 600 mm rainfall, red sandy soils, tank irrigation and groundnut–millet cropping. Reasoning: low rainfall, red soils and tank dependence indicate the Rayalaseema uplands, not the rice-growing delta, which has over 1,000 mm rainfall and canal irrigation.
Traps
Placing Hyderabad in Andhra Pradesh after 2014; confusing the Godavari and Krishna deltas; treating all of Andhra Pradesh as wet; forgetting that the Eastern Ghats are discontinuous.