Benchmark tests for separating n time components of runoff with one stable isotope tracer
- Water Research Agency, D-69257 Wiesenbach, Germany
Abstract. A validation of the recently introduced iterative extension of the standard two-component hydrograph separation method is presented. The data for testing this method are retrieved from a random rainfall generator and a rainfall-runoff model composed of linear reservoirs. The results show that it is possible to reconstruct the simulated event water response of a given random model input by applying the iterative separation model and using a single stable isotope tracer. The benchmark model also covers the partially delayed response of event water so that a situation can be simulated in which pre-event water is rapidly mobilized. It is demonstrated how mathematical constraints, such as an ill-conditioned linear equation system, may influence the separation of the event water response. In addition, it is discussed how the volume weighted separated event water response can serve as an estimator for a time-varying backward travel time distribution.
Status: open (until 05 Jul 2021)
- AC1: 'Comment on hess-2021-213 - Additional graphics to better visualize the discussion in section 4.3', Simon Hoeg, 18 May 2021 reply
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