{"title":"Application of an Analytical Model to Obtain Daily Flow Duration Curves for Different Hydrological Regimes in Switzerland","authors":"Ana Clara Santos, Maria Manuela Portela, Bettina Schaefli","volume":143,"journal":"International Journal of Environmental and Ecological Engineering","pagesStart":694,"pagesEnd":701,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10009791","abstract":"This work assesses the performance of an analytical
\r\nmodel framework to generate daily flow duration curves, FDCs,
\r\nbased on climatic characteristics of the catchments and on their
\r\nstreamflow recession coefficients. According to the analytical model
\r\nframework, precipitation is considered to be a stochastic process,
\r\nmodeled as a marked Poisson process, and recession is considered
\r\nto be deterministic, with parameters that can be computed based
\r\non different models. The analytical model framework was tested
\r\nfor three case studies with different hydrological regimes located in
\r\nSwitzerland: pluvial, snow-dominated and glacier. For that purpose,
\r\nfive time intervals were analyzed (the four meteorological seasons
\r\nand the civil year) and two developments of the model were tested:
\r\none considering a linear recession model and the other adopting
\r\na nonlinear recession model. Those developments were combined
\r\nwith recession coefficients obtained from two different approaches:
\r\nforward and inverse estimation. The performance of the analytical
\r\nframework when considering forward parameter estimation is poor in
\r\ncomparison with the inverse estimation for both, linear and nonlinear
\r\nmodels. For the pluvial catchment, the inverse estimation shows
\r\nexceptional good results, especially for the nonlinear model, clearing
\r\nsuggesting that the model has the ability to describe FDCs. For
\r\nthe snow-dominated and glacier catchments the seasonal results are
\r\nbetter than the annual ones suggesting that the model can describe
\r\nstreamflows in those conditions and that future efforts should focus
\r\non improving and combining seasonal curves instead of considering
\r\nsingle annual ones.","references":"[1] R. M. Vogel and N. M. Fennessey, \u201cFlow-duration curves i: New\r\ninterpretation and confidence intervals,\u201d Journal of Water Resources\r\nPlanning and Management, vol. 120, no. 4, pp. 485\u2013504, jul 1994.\r\n[2] A. Castellarin, G. Botter, D. A. Hughes, S. Liu, T. B. M. J. Ouarda,\r\nJ. Parajka, D. A. Post, M. Sivapalan, C. Spence, A. Viglione et al.,\r\n\u201cPrediction of flow duration curves in ungauged basins,\u201d Runoff\r\nprediction in ungauged basins: Synthesis across processes, places and\r\nscales, pp. 135\u2013162, 2013.\r\n[3] G. Botter, A. Porporato, I. Rodriguez-Iturbe, and A. 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