摘要: The National Weather Service (NWS) has provided river forecasts for navigationand flood warning since the mid 1800s (National Oceanic and Atmospheric Administration (NOAA), 1994) The NWS mission includes the protection of life and... 展开 The National Weather Service (NWS) has provided river forecasts for navigationand flood warning since the mid 1800s (National Oceanic and Atmospheric Administration (NOAA), 1994) The NWS mission includes the protection of life and property and enhancement of the national economy. In so doing, the NWS strives to deliver quality forecasts with increasing accuracy. One method established to improve forecasts is completing a post-analysis or verification of the forecast data compared to observed data. The typical method used for determining the accuracy of a river forecast has been to pair observed and forecast values in order to calculate statistics such as root mean-squared error (RMSE) and mean absolute error. Such calculations are certainly useful in comparing magnitudes of error from one event to another at one forecast point, but they cannot easily be compared from one location to another. 收起