鄱阳湖流域1:25万水系/湖泊/水库关系数据（2002年）

该数据集将鄱阳湖流域2002年1:25万的水系、湖泊、水库三种空间要素在空间上建立了关联关系，通过该数据可反映出每个湖泊所有的出入湖水系，每个水库关联的河流，以及每条河流关联的湖泊、水库。
该数据在1：25万湖泊、水库、河流的基础上，在湖泊、水库、河流国家标准编码的基础上进行了扩充，特别是对河流进行了分段，河段编码可提现出河段的空间位置，通过arcgis工具建立湖泊、水库、河流之间的关系，对关联点进行编码，湖泊、水库、河流之间通过关联点的编码识别，建立起空间关联关系。实现湖泊关联的水系查询，以及根据水系查询其关联的湖泊或水库。

This dataset establishes spatial associations among three spatial feature types—water systems, lakes, and reservoirs—within the Poyang Lake Basin using 2002 1:250,000-scale geospatial data. With this dataset, one can obtain all inflow and outflow water systems connected to each lake, the rivers linked to each reservoir, as well as the lakes and reservoirs associated with each river.

Built upon the 1:250,000-scale lake, reservoir, and river datasets, this dataset expands the existing national standard codes for lakes, reservoirs, and rivers. Notably, rivers are segmented into reaches, and the reach code can reflect the spatial location of each river segment. Spatial associations between lakes, reservoirs, and rivers are established using ArcGIS tools, where association points are coded, and the interconnections among these three feature types are identified via the codes of these association points. This enables two core query functions: querying the water systems associated with a specific lake, and retrieving the linked lakes or reservoirs based on a given water system.