Sensitivity analysis of the rainfall–runoff modeling parameters in data-scarce urban catchment
Por:
Ballinas-González H.A., Simuta-Champo R., Alcocer-Yamanaka V.H., Canto-Rios J.J.
Publicada:
1 ene 2020
Resumen:
Rainfall–runoff phenomena are among the main processes within the hydrological cycle. In urban zones, the increases in imperviousness cause increased runoff, originating floods. It is fundamental to know the sensitivity of parameters in the modeling of an urban basin, which makes the calibration process more efficient by allowing one to focus only on the parameters for which the modeling results are sensitive. This research presents a formal sensitivity analysis of hydrological and hydraulic parameters—absolute–relative, relative–absolute, relative–relative sensitivity and R2—applied to an urban basin. The urban basin of Tuxtla Gutiérrez, Chiapas, in Mexico is an area prone to flooding caused by extreme precipitation events. The basin has little information in which the records (with the same time resolution) of precipitation and hydrometry match. The basin model representing an area of 355.07 km2 was characterized in the Stormwater Management Model (SWMM). The sensitivity analysis was performed for eight hydrological parameters and one hydraulic for two precipitation events and their impact on the depths of the Sabinal River. Based on the analysis, the parameters derived from the analysis that stand out as sensitive are the Manning coefficient of impervious surface and the minimum infiltration speed with R2 > 0.60. The results obtained demonstrate the importance of knowing the sensitivity of the parameters and their selection to perform an adequate calibration. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Filiaciones:
Ballinas-González H.A.:
Mexican Institute of Water Technology, Paseo Cuauhnáhuac 8532, Progreso, Jiutepec, Morelos 62550, Mexico
Simuta-Champo R.:
Mexican Institute of Water Technology, Paseo Cuauhnáhuac 8532, Progreso, Jiutepec, Morelos 62550, Mexico
Alcocer-Yamanaka V.H.:
National Water Commission, Insurgentes Sur 2416, Copilco El Bajo, Coyoacan, CDMX, 04340, Mexico
Canto-Rios J.J.:
Autonomous University of Yucatán, Industrias no contaminantes S/N, Mérida, Yucatán 150, Mexico
All Open Access; Gold
|