towards the Chilika Lake. This shift also resulted in the creation of two lagoons, known as Sar and Samang, on the eastern and northern parts of Puri respectively. Sar lagoon has a length of in an east–west direction and a width of in north–south direction. The estuary of the Bhargavi River has a shallow depth of just and the process of siltation continues. According to a 15th-century Odia writer Saraladasa, the bed of the unnamed stream that flowed at the base of the Blue Mountain or Neelachal was filled up. Katakarajavamsa, a 16th-century chronicle (c.1600), attributes filling up of the bed of the river which flowed through the present Grand Road, as done during the reign of King Narasimha II (1278–1308) of Eastern Ganga dynasty. Climate According to the Köppen–Geiger climate classification system the climate of Puri is classified as Aw (Tropical savanna climate). The city has moderate and tropical climate. Humidity is fairly high throughout the year. The temperature during summer touches a maximum of and during winter it is . The average annual rainfall is and the average annual temperature is . The weather data is given in the following table. Demographics According to the 2011 Census of India, Puri is an urban agglomeration governed by the Municipal Corporation in Odisha state, with a population of 200,564, comprising 104,086 males, 96,478 females, and 18,471 children (under six years of age). The sex ratio is 927. The average literacy rate in the city is 88.03 percent (91.38 percent for males and 84.43 percent for females). Administration The Puri Municipality, Puri Konark Development Authority, Public Health Engineering Organisation and Orissa Water Supply Sewerage Board are some of the principal organisations that are devolved with the responsibility of providing for civic amenities such as water supply, sewerage, waste management, street lighting and infrastructure of roads. The major activity, which puts maximum pressure on these organisations, is the annual event of the Ratha Yatra held during June- July. According to the Puri Municipality more than a million people attend this event. Hence, development activities such as infrastructure and amenities to the pilgrims, apart from security, gets priority attention. The civic administration of Puri is the responsibility of the Puri Municipality. The municipality came into existence in 1864 in the name of the Puri Improvement Trust, which was converted into Puri Municipality in 1881. After India's independence in 1947, the Orissa Municipal Act