Geography of Karnataka

Overview

Geography of Karnataka is a consistently tested topic in KAR TET Paper II Social Studies. Questions typically focus on physical features, major rivers, climate patterns, and natural resources specific to the state. Since this is a Karnataka-specific examination, expect direct factual questions on district-wise geography, river basins, agro-climatic zones, and mineral wealth.

Mastery of this topic requires memorising key facts—elevations, river lengths, district locations—while understanding the cause-effect relationships between physiography, climate, and resource distribution. This topic also connects with agriculture, economy, and environmental studies sections, making it high-value for integrated questions.

Key Concepts

• **Four Physiographic Regions**: Karnataka divides into the Coastal Plain (Karavali), Western Ghats (Sahyadri), Southern Plateau (Mysuru Plateau), and Northern Plateau (includes parts of Deccan Trap).

• **Western Ghats as Water Tower**: The Sahyadri range acts as the principal watershed—rivers flowing east originate here; heavy orographic rainfall on the western slopes feeds the coastal region.

• **River Systems**: Karnataka has three major river basins—Krishna (largest), Kaveri (most utilised), and west-flowing rivers (Sharavathi, Netravati, Kali) that are short but powerful.

• **Agro-Climatic Zones**: The state has 10 agro-climatic zones ranging from humid coastal to semi-arid northern plains, directly influencing cropping patterns.

• **Mineral-Rich Bellary-Hospet Belt**: The Dharwar rock system in northern Karnataka contains iron ore, manganese, and gold deposits—Kolar Gold Fields were historically significant.

• **Biodiversity Hotspot**: The Western Ghats portion in Karnataka is a UNESCO World Heritage Site, hosting unique flora and fauna including the lion-tailed macaque and Malabar giant squirrel.

• **Seasonal Rainfall Pattern**: Southwest monsoon (June–September) brings 80% of annual rainfall; coastal and Malnad regions receive over 3000 mm, while northern districts receive less than 600 mm.

Formulas / Key Facts

| Feature | Key Data | |---------|----------| | Total Area | 1,91,791 sq km (6th largest state) | | Coastline | 320 km along Arabian Sea (Uttara Kannada, Udupi, Dakshina Kannada) | | Highest Peak | Mullayanagiri (1,930 m) in Chikkamagaluru | | Longest River | Krishna (1,400 km total; ~480 km in Karnataka) | | Largest Dam | Almatti Dam on Krishna River | | Jog Falls | On Sharavathi River; 253 m drop (second highest plunge waterfall in India) | | Major Mineral | Iron ore (Bellary-Hospet); Manganese (Shimoga, Bellary) | | Forest Cover | Approximately 38,575 sq km (~20% of state area) | | Kaveri Basin Districts | Kodagu, Mysuru, Mandya, Chamarajanagar, Bengaluru Rural | | Driest District | Raichur (annual rainfall ~550 mm) |