The Central hills of Sri Lanka cover more than one fifth (1/5) of the land mass of the total land mass of 65610km2 of the country. According to Massenerhebung or mass elevation effect theory, uplifted mountains arranged in ¿anchor¿ shaped and it consist with all the topographical features to make high landscape diversity in Sri Lanka. This arrangement helps to give high rainfall from the monsoon winds and radial distributionwater throughout the country. Northern outlier of the central highlands in Sri Lanka ¿head of the anchor¿ represent the Knuckles mountain range and its lay north-western south-eastern direction and The south-western and southern sides of the is separated from the main central highlands by the valley of the Mahaweli river.