Panchkula is a planned city in Panchkula District, Haryana, India. It is a satellite city of the Union Territory of Chandigarh. The prestigiousChandimandir CantonmentHeadquarters of the Indian Western Command, is also located in Panchkula city. There are five towns in the district named Panchkula,Barwala Pinjore, Kalka and Raipur Rani. The only Hill station in Haryana called Morni is also in this District. The estimated population of Panchkula city, in 2006, is 2,00,000. Panchkula and Mohali (in Punjab) are two satellite cities of Chandigarh. These three cities are collectively known as Chandigarh Tricity. The origin of the name Panchkula is based on the five irrigation canals (or kuls as they were called, making it Panch Kul of five canals) that take water from the Ghaggar in the uphill section and distribute it from Nada Sahib to Mansa Devi. The Nada canal has now been eroded by the river and most of the kul's pass through the cantonement of Chandimandir towards Mansa Devi. The canals are a beautiful example of community property and are maintained by the villagers along the way, with distribution days decided. The canals were made by a ruler in the past, and follow the contours to take water to levels much higher than the river at the same spot.