کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4577347 | 1630007 | 2011 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A downward structural sensitivity analysis of hydrological models to improve low-flow simulation A downward structural sensitivity analysis of hydrological models to improve low-flow simulation](/preview/png/4577347.png)
SummaryBetter simulation and earlier prediction of river low flows are needed for improved water management. Here, a top–down structural analysis to improve a hydrological model in a low-flow simulation perspective is presented. Starting from a simple but efficient rainfall–runoff model (GR5J), we analyse the sensitivity of low-flow simulations to progressive modifications of the model’s structure. These modifications correspond to the introduction of more complex routing schemes and/or the addition of simple representations of groundwater–surface water exchanges. In these tests, we wished to improve low-flow simulation while avoiding performance losses in high-flow conditions, i.e. keeping a general model.In a typical downward modelling perspective, over 60 versions of the model were tested on a large set of French catchments corresponding to various low-flow conditions, and performance was evaluated using criteria emphasising errors in low-flow conditions. The results indicate that several best performing structures yielded quite similar levels of efficiency. The addition of a new flow component to the routing part of the model yielded the most significant improvement. In spite of the close performance of several model structures, we conclude by proposing a modified model version of GR5J with a single additional parameter.
► We detail a downward approach for improving a model for low-flow simulation.
► We compare several model structures on a large set of catchments and propose an improved model version.
► We compare the model with existing ones, with satisfactory results.
Journal: Journal of Hydrology - Volume 411, Issues 1–2, 6 December 2011, Pages 66–76