linguistic:paraphrasing, quality:correction
Hydrography

The Western Ghats form one of the major watersheds of India, feeding many perennial rivers. These major river systems drain almost 40% of the land area of the country. The major river systems originating in the Western Ghats are the Godavari, Kaveri, and Krishna. Most rivers flow eastwards towards the Bay of Bengal owing to the steeper gradient moving from east to west, and many smaller streams drain the region, often carrying a large volume of water during the monsoon months. The streams and rivers give rise to numerous waterfalls in the region. The rivers have been dammed for hydroelectric and irrigation purposes, with major reservoirs spread across the region.