Ingenieur Vol 80 ingenieur 2019 octoberfinal | Page 78

INGENIEUR The 3-D model of the Jiaohe city ruins. The 30m-high cliff walls on the perimeter of the city, adjacent to the two surrounding rivers, afforded natural protection to the city without having to build external security walls as practiced by most other ancient cities. b) data collection and compilation c) field surveying and mapping d) archaeological excavation and investigation e) construction of protective dike against flood f) improvement of tourist facilities and administration g) conservation of the northern monastery and construction of a restored replica near the South Gate. h) establishment of a weather monitoring system at Jiaohe. The ruins of Jiaohe provide an eye witness account of the vicissitudes of history of the ancient people of different nationalities in Xinjiang. They hold great value for the study of Central Asia, the Silk Road, ancient architecture, religions, and ancient arts. As one of the world’s best heritage sites of an earth castle, it was included in the UNESCO World Heritage List on June 22, 2014. It is worth a visit for engineers or researchers who are interested in understanding the durability of earthen structures that have lasted more than 2,000 years. 6 76 VOL 2019 VOL 80 55 OCTOBER-DECEMBER JUNE 2013 Existing view downstream of one the two rivers enfolding Jiaohe city, which give it its name meaning “two rivers’ meeting point”. The water in this arid region is best suited for the cultivation of grapes.