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Abstract
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| This study evaluates the implicit safety level in hydrologic infrastructure design, performed in common practice with the calculation of the peak-flow frequency curve for high return periods (100 < return period < 10,000 years) through use of single-peak hyetographs in a semidistributed hydro-meteorological event-based model. Through consideration of two basins located in mainland Spain, the paper studies the effect on the peak-flow frequency curve of (1) the shape of the design hyetograph defined by the alternating blocks (AB) method or through applying a Monte Carlo (MC) procedure; (2) the catchment area (ranging from 140 to 1,800 km2); and (3) the extent of disaggregation in the hydro-meteorological model (varying from 14 to 66 subbasins). The effect on hydrologic safety was measured through using the ratio R ¿ QmaxAB=QmaxMC, with QmaxAB, the peak flows obtained with the AB method and QmaxMC, the application of MC. The paper finds the following: (1) that the degree of safety decreases as the basin area increases, regardless of the extent of disaggregation in the model used; (2) a greater disaggregation in semidistributed hydrologic models leads to greater water safety, mainly for smaller basins (in this study, 150 km2); and (3) at the level of subbasin, the degree of safety decreases as the time of concentration and area increase | |
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International
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Si |
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JCR
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Si |
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Title
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Journal of Hydrologic Engineering |
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ISBN
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1084-0699 |
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Impact factor JCR
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1,624 |
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Impact info
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Volume
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19 |
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10.1061/(ASCE)HE.1943-5584.0000981 |
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Journal number
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12 |
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From page
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04014028 |
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To page
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04014028 |
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Month
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SIN MES |
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Ranking
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Q1 |