The topology of Tiruchirappalli is almost flat with a few isolated hillocks rising above the surface, the highest of which is the Rockfort. The average elevation is 289 feet (88 m).[4] The city spread over an area of 146.7 square kilometres (56.6 sq mi) is situated on the plains between the Shevaroy Hills to the north and the Palni Hills to the south and south-west.[5] The city is situated at the head of the Cauvery Delta[6] which commences 16 kilometres (9.9 mi) west of Tiruchirappalli[7] where the Cauvery River branches into two streams forming the island of Srirangam.[8]
A belt of cretaceous rock known as the Trichinopoly Group lies to the north of the city. It commences from the banks of the Kaveri River and extends northwards gradually thinning before joining another belt of cretaceous rock known as the Ariyalur Group.[9] Both the northern and southern corners of the Trichinopoly Group rests on a layer of gneiss.[9]
Divisions
The city is divided into three parts: The Cantonment area to the south, the temples to the north and the bazaar in the center of the city.[10] Most of Tiruchirapalli's hotels and government and post offices are situated in the cantonment while most of Tiruchirapalli's temples are located in the north.[10] The Rockfort and its temple are situated in the centre of the city and surrounded by a bazaar.[10]
The earliest political divisions of the city were into the Cantonment and the city. The Cantonment was situated one and a half miles to the south of the city and was bounded by Uraiyur to the north and Tennur, Yeddatharavu and Beemanaickenpalaiyam to the south. As of 1866, the town had a population of 57,177 while the Cantonment had a population of 19,375. Currently, Tiruchirappalli is divided into four administrative zones: Srirangam, Ariyamangalam, Golden Rock and Abhishekapuram, which are further sub-divided into 60 wards.
During the summer months of March to May, Tiruchirappalli is extremely hot and dry during daytime.[12] However, the evenings are rendered cool by cold winds that blow from the south-east.[12] It is quite sultry during September and October but cool and pleasant from November to February.[12] According to a popular saying, the climate of Tiruchirappalli is "eight months hot and four hotter."[12] The city receives an average annual rainfall of 83 centimetres (33 in)
Civic amenities
The city gets its drinking water supply from five headworks on the Cauvery River and 1,470 bore wells linked to 60 service reservoirs in and around the city.[13] There are a total of 286 slums in Tiruchirappalli with a population of about 162,000.[13]
Notes
^Pippa de Bruyn; Keith Bain; David Allardice (2010). Frommer's India. Frommer's. p. 350. ISBN978-0-470-55610-8.