Study on effective spatial resolution for generating precipitation based on observation data

The relations among the distribution of hydrological & meteorological gauges and the spatial resolution of precipitation were studied. Based on the observed data, a formula for calculating the effective spatial resolution was established, which means that the most accurate spatial resolution can be concluded from the information abstracted from the observed data and the indexes on the demand for the accuracy of the data. It provides the scientific evidences for gaining precipitation with effective spatial resolution from limited observation data.