三峡库区万县市城市道路网络发展变化的研究

根据１９５６，１９８３和１９９１年万县市城市道路网络拓扑图，运用连接度、环通度等指标研究该市城市道路网络的发展变化及存在的问题。结果表明：它的发展受到经济条件和地形因素的制约，现在已形成几个重要的交通集散中心；这３年中，１９５６年网络结构最复杂，１９８３年最简单，但都存在物流和客流运动不畅的问题，并且影响生态环境。三峡工程将对该市城市道路网络的发展起良好作用。

A STUDY ON THE DEVELOPMENT OF CITY ROAD NERWORK AT WANXIAN CITY IN THE THREE* GORGE DISTRICT

Depending on the road network topological graphs of Wanxian city in 1956,1983 and 1991 andwith the use of the indices of network conectivity and circurity,the author studied the developmentsand problems of the city road netword.The results show that the major obetacles restricting the develop-ment of the city road nework appear to lie in the fact that its econornic condition and topographic fac-tors are cumtbersome. Now a few inportant traffic distributing centres are formed. The network con-structure of the city was most complicated in 1956 and simplest in 1983.But all of them are with someproblems for the subetance flow and traveller flow and with also the ecological influences on enviro-ment.The Sanxia(three gorges)engineering will be benifical for the development of the city road net-work there.