کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6412131 | 1332897 | 2014 | 10 صفحه PDF | دانلود رایگان |
- Data assimilation and post-processing impact hydrologic ensemble forecasts' skill.
- Data assimilation has a strong impact on forecast accuracy.
- Post-processing has a strong impact on forecast reliability.
- The combined benefits of data assimilation and post-processing were demonstrated.
- We recommend the use of both data assimilation and post-processing in forecasting.
SummaryWe investigate how data assimilation and post-processing contribute, either separately or together, to the skill of a hydrological ensemble forecasting system. Based on a large catchment set, we compare four forecasting options: without data assimilation and post-processing, without data assimilation but with post-processing, with data assimilation but without post-processing, and with both data assimilation and post-processing. Our results clearly indicate that both strategies have complementary effects. Data assimilation has mainly a very positive effect on forecast accuracy. Its impact however decreases with increasing lead time. Post-processing, by accounting specifically for hydrological uncertainty, has a very positive and longer lasting effect on forecast reliability. As a consequence, the use of both techniques is recommended in hydrological ensemble forecasting.
Journal: Journal of Hydrology - Volume 519, Part D, 27 November 2014, Pages 2775-2784