长江流域的省际（县际）水事纠纷一般呈现复杂、敏感、多样和突发的特点。为提前制定好规划并加强监管以期避免水事纠纷，在以长江流域 1∶25万和1∶5万河流矢量数据库的基础上，建立了一个长江流域省际边界河流地理信息系 统。该系统融合了GIS，Web和database技术，并采用三层分布式ArcGIS的体系结构。系统 具有较好的前瞻性和较高的实用性(如能实现数据库的远程访问)，经过一个较长期的试运行 ，运行效果良好。

Water affair disputes of interprovincial rivers in Yangtze River Valley are characterized by complex, sensitivity, multiformity and s udden occurrence. For designing a planning in advance and strengthening supervision to effectively avoid water-affair disputes, a Yangtze River Valley interprovincial rivers GIS has been established on the basis of both the 1∶250 000 and 1∶50 000 river vector database of Yangtze River Valley. This system adopts a three-layer distributed architecture, in which three kinds of technologies——GIS, WEB and database are fused. It possesses better foreseeable capacity and higher practicality, such as a long-distance visit of database. Through trial operations for a longer time, it is in good working order.