Regional flow duration curves for ungauged sites in Sicily

Viola, Francesco; Noto, Leonardo; Cannarozzo, Marcella; Loggia, Goffredo La

doi:10.5194/hess-15-323-2011

Cited by 37 publications

(12 citation statements)

References 26 publications

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“…Models used in ephemeral catchments are often conceptual, with a limited number of parameters [e.g., Ye et al ., ; Viola et al ., ], with physically based and spatially distributed models only recently applied to ephemeral catchments [ Camporese et al ., ; Niedda and Pirastru , ; Jiang et al ., ]. Models of flow duration curves designed for ephemeral streams are also available in the literature [ Viola et al ., ; Pumo et al ., ].…”

Section: Introductionmentioning

confidence: 99%

Water balance complexities in ephemeral catchments with different land uses: Insights from monitoring and distributed hydrologic modeling

Dean

Camporese

Webb

et al. 2016

Water Resources Research

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Although ephemeral catchments are widespread in arid and semiarid climates, the relationship of their water balance with climate, geology, topography, and land cover is poorly known. Here we use 4 years (2011–2014) of rainfall, streamflow, and groundwater level measurements to estimate the water balance components in two adjacent ephemeral catchments in south‐eastern Australia, with one catchment planted with young eucalypts and the other dedicated to grazing pasture. To corroborate the interpretation of the observations, the physically based hydrological model CATHY was calibrated and validated against the data in the two catchments. The estimated water balances showed that despite a significant decline in groundwater level and greater evapotranspiration in the eucalypt catchment (104–119% of rainfall) compared with the pasture catchment (95–104% of rainfall), streamflow consistently accounted for 1–4% of rainfall in both catchments for the entire study period. Streamflow in the two catchments was mostly driven by the rainfall regime, particularly rainfall frequency (i.e., the number of rain days per year), while the downslope orientation of the plantation furrows also promoted runoff. With minimum calibration, the model was able to adequately reproduce the periods of flow in both catchments in all years. Although streamflow and groundwater levels were better reproduced in the pasture than in the plantation, model‐computed water balance terms confirmed the estimates from the observations in both catchments. Overall, the interplay of climate, topography, and geology seems to overshadow the effect of land use in the study catchments, indicating that the management of ephemeral catchments remains highly challenging.

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Section: Introductionmentioning

confidence: 99%

Water balance complexities in ephemeral catchments with different land uses: Insights from monitoring and distributed hydrologic modeling

Dean

Camporese

Webb

et al. 2016

Water Resources Research

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“…This condition identifies the basin behaviour as ephemeral and makes the task of any R–R model harder than for a perennial basin (Ye et al ., ). In such a basin, also the overall evaluation of the average available water resources using FDCs fails because of the presence of dry periods with a strong interannual variability (Croker et al ., ; Viola et al ., ; Pumo et al ., ).…”

Section: Case Studymentioning

confidence: 97%

EHSM: a conceptual ecohydrological model for daily streamflow simulation

Viola

Pumo

Noto

2013

Hydrological Processes

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A parsimonious conceptual lumped model is here presented with the aim of simulating daily streamflow in semi-arid areas. The model, processing daily rainfall and reference evapotranspiration at basin scale, reproduces surface and subsurface runoff, soil moisture dynamics, and actual evapotranspiration fluxes. The key elements of this numerical model are the soil bucket, where rainfall, evapotranspiration, and leakage drive soil moisture dynamics, and two linear reservoirs working in parallel with different characteristic response times. The surface reservoir, able to simulate the fast response of the basin, is fed by rain falling on impervious area and by runoff generated with excess of saturation mechanism, whereas the deep reservoir, which simulates the slow response, is fed by instantaneous leakage pulses coming from the soil bucket. Seven model parameters, which summarize soil, vegetation, and hydrological catchment properties, are assessed on a Sicilian basin, first using simple basic ecohydrological knowledge and then Monte Carlo simulations as well.\ud The proposed model provides reliable estimate of daily runoff, accurate reproduction of flow duration curve, and physically consistent traces of soil moisture and evapotranspiration fluxes. Model performances are comparable in the two cases of calibrated and ecohydrologically driven parameters, emphasizing how basic descriptors are able to provide runoff estimatio

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“…These were sorted and presented as a plot of log(monthly discharge) against probability of exceedance, plotted on a probability scale or z-score, so that a log-normal distribution of discharges appears as a straight line. Since, we wish to analyse the frequency of low flow conditions, we have preferred to use the complete synthetic record, rather that partition it from the ouset on the basis of dry periods, as has been proposed by Viola et al (2011). Examples are shown in Fig.…”

Section: Exceedance Curves and Other Indicator Toolsmentioning

confidence: 99%

Characterizing temporary hydrological regimes at a European scale

Kirkby

Gallart²,

Kjeldsen³

et al. 2011

Preprint

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Monthly duration curves have been constructed from climate data across Europe to help address the relative frequency of ecologically critical low flow stages in temporary rivers, when flow persists only in disconnected pools in the river bed. The hydrological model is based on a partitioning of precipitation to estimate water available for evapotranspiration and plant growth and for residual runoff. The duration curve for monthly flows has then been analysed to give an estimate of bankfull flow based on recurrence interval. The corresponding frequency for pools is then based on the ratio of bank full discharge to pool flow, arguing from observed ratios of cross-sectional areas at flood and low flows to estimate pool flow as 0.1% of bankfull flow, and so estimate the frequency of the pool conditions that constrain survival of river-dwelling arthropods and fish. The methodology has been applied across Europe at 15 km resolution, and can equally be applied under future climatic scenarios

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Regional flow duration curves for ungauged sites in Sicily

Cited by 37 publications

References 26 publications

Water balance complexities in ephemeral catchments with different land uses: Insights from monitoring and distributed hydrologic modeling

Water balance complexities in ephemeral catchments with different land uses: Insights from monitoring and distributed hydrologic modeling

EHSM: a conceptual ecohydrological model for daily streamflow simulation

Characterizing temporary hydrological regimes at a European scale

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