南阳古城空间演变与城市水系的营建研究

南阳古城在其城市发展过程中经历了汉代宛城、唐宋小城、明代唐王府城和清末"梅花城"的不同城市空间形态,它们勾勒出了古城历史发展的前后传承脉络。其中,城市水系作为一个重要的自然要素,在古城的选址、城市对外交通、城池的军事防御体系、城市内部的功能分区、防洪涝减灾等方面发挥了主要作用,反映出水系与城市之间的内在有机联系,成为深入探研和把握古城历史发展规律与特色内涵的不可或缺的线索与路径。

Study on the Spatial Evolution and the Canal Systems Construction of the Ancient City of Nanyang

Throughout the history of the ancient city of Nanyang, there are the Wan city in Han Dynasty, the Small city in Tang and Song Dynasties, the Tang-king city in Ming Dynasty and the Meihua city in Qing Dynasty in different historical period. They give us a brief outline of the ancient city of Nanyang. As an important natural element, urban canal systems plays an important role in many aspects, including cities site selection, urban external transport, the military def- ense system of the city, urban function partition, urban flood control and disaster reduction and so on. All reflect the intrinsic relationships between the urban canal system and the city. The urban canal system is the indispensable clue to the research on the rule of historical development and the characteristics of the ancient city.