This paper not only aims to establish a plan to acquire the water stage data in a constant and proper manner by using
limited manpower and costs, but also establishes the fundamental technology for acquiring the water level observation
data or the stage data. For this, this paper focuses on how to acquire the stage data, in a uniform manner, that can
represent each basin by developing the technology for establishing the optimal observational network. For that, this
paper identifies the current status of the stage gauge stations installed in the ChungJu dam including wetland basin
mainly along the national rivers. Then, thus obtained factors are used to develop the representative unit hydrograph.
After that, the data are converted into the probability density function. Then, the stations are calculated information
transfer amount. As a last step, we establish the optimized stage gauge network by the location of the stage station
and space impact that takes into account for the combinations of the number of the stations. In other words, we
consider the combination of the stage gauge station with information transfer amount and spatial correlation analysis
for estimation.