Huaihe River Basin is one of the top seven major river basins and has first established a rather vigorous
plan of water pollution control in China. Huaihe River Basin is a complicated network system including
streams, tributaries, lakes and water projects, as being a semi-artificial stream network which is controlled
by dam and floodgate. Planning, management, maintenance and emergency-response of this stream
network require a series of professional analysis tools, which are closely related to the spatial modality
and spatial distribution. From this prospective, GIS provides necessary technical support for the semiartificial
stream network management