Karnataka occupies a large section of the southwestern Deccan Peninsula. Its geography is usually understood in three broad natural zones: the **Karavali** or coastal belt along the Arabian Sea, the **Malnad** or hilly western region associated with the Western Ghats, and the **Bayaluseeme** or inland plains of the Deccan plateau. This west-to-east transition strongly influences settlement, agriculture, transport, and climate.
The coastal region is relatively narrow but economically and ecologically significant, with estuaries, beaches, river mouths, ports, lateritic soils, and fishing settlements. Immediately inland, the Western Ghats rise sharply and form one of India’s most important biodiversity hotspots. These mountains support dense forests, heavy rainfall, waterfalls, and plantation crops such as coffee, arecanut, and spices.
East of the Ghats, much of Karnataka opens into the **Deccan Plateau**, with rolling uplands, granite formations, broad valleys, and dry plains. This interior includes both productive irrigated belts and drought-prone areas. Major rivers include the **Krishna**, **Cauvery (Kaveri)**, **Tungabhadra**, **Sharavathi**, **Kali**, **Bhima**, **Kabini**, and **Hemavati**. These rivers support hydropower, drinking water systems, agriculture, and important reservoirs.
Karnataka’s natural resources include iron ore, manganese, limestone, granite, bauxite in some areas, forest products, and significant hydropower potential. The state’s geology includes ancient crystalline rocks of the Peninsular Gneiss and Dharwar craton, making it important for both mineral extraction and geological study. Forest landscapes range from evergreen and semi-evergreen tracts in the west to drier deciduous forests inland, with wildlife protected in national parks and tiger reserves.
Climatically, Karnataka spans humid tropical coast, cool and wet mountain climates, and semi-arid interior conditions. This internal diversity is one of the state’s defining physical characteristics.