Cooum (flowing in the northern part) and Adyar (flowing in the southern part), a canal (the Buckingham), and a stream (the Otteri Nullah) slicing the district into several islands. The district falls under Seismic Zone III indicating a moderate risk of earthquake. Geologically the district is divided into three regions, namely, sandy, clayey and hard-rock regions. The soil comprises clay, shale and sandstone. Of the total land area, reserved forests cover 2.71 km2 and is concentrated in and around the Guindy National Park region, one of the few national parks in the world located within a city. The forest cover of the district is as follows: Climate Chennai has Tropical savanna climate (Köppen: Aw) Demographics According to 2011 census, Chennai district had a population of 4,646,732 with a sex-ratio of 989 females for every 1,000 males, much above the national average of 929. Scheduled Castes and Scheduled Tribes accounted for 16.78% and 0.22% of the population respectively. The average literacy of the district was 81.27%, compared to the national average of 72.99%. With the expanded limits Chennai district had a population of 6,748,026. The district had a total of 1,154,982 households. There were a total of 1,817,297 workers, comprising 10,210 cultivators, 10,251 main agricultural labourers, 29,143 in house hold industries, 1,569,950 other workers, 197,743 marginal workers, 4,244 marginal cultivators, 3,423 marginal agricultural labourers, 8,202 marginal workers in household industries and 181,874 other marginal workers. Religion Language Administration and politics In 2013, five taluks on the district were split to create five new ones: Velachery, Purasawalkam, Ayanavaram, Aminjikarai and Guindy. In January 2018, the state government announced that the district will be expanded to match the boundaries of the Greater Chennai Corporation. This will integrate six additional taluks from Tiruvallur and Kanchipuram districts into the Chennai district. The new divisions and taluks of the district will be: Revenue divisions and taluks North Chennai Revenue Division, headquartered at Tondiarpet, contains taluks of Tiruvottiyur, Madhavaram, Perambur, Tondiarpet, and Purasaiwalkam. Central Chennai Revenue Division, headquartered at Ambattur, contains the taluks of Mambalam, Egmore, Aminjikarai, Ayanavaram, Ambattur, and Maduravoyal. South Chennai Revenue Division, headquartered at Guindy, contains the taluks of Mylapore, Guindy, Velachery, Alandur, and Sholinganallur. Members of Parliament Politics |} See also Chennai Metropolitan Area Districts of Tamil Nadu Mumbai City district Kolkata district National Capital Territory of Delhi Notes References External links Chennai District Districts of Tamil Nadu