Organization and Process

Kirkby, M. J.

doi:10.1002/0470848944.hsa003

Cited by 14 publications

(13 citation statements)

References 14 publications

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“…The channel precipitation, which can be treated as direct runoff, can provide an important component of rapid response to storms (Kirkby, 2005). The proportion of streamflow supplied by the channel precipitation can vary with the intensity and the duration of rainfall.…”

Section: Direct Channel Precipitationmentioning

confidence: 99%

A priori parameter estimates for a distributed, grid-based Xinanjiang model using geographically based information

Yao

et al. 2012

Journal of Hydrology

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Section: Direct Channel Precipitationmentioning

confidence: 99%

A priori parameter estimates for a distributed, grid-based Xinanjiang model using geographically based information

Yao

et al. 2012

Journal of Hydrology

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“…However, process-based studies at both hillslope and catchment scales have demonstrated that in these environments runoff may be also produced as the result of infiltration excess overland flow, especially in areas regarded as impervious or of low permeability because of human activities (Jordan 1994). The hydrological systems are complex and show significant seasonality, such that the dominant processes may experience changes throughout the year (Kirkby 2005).…”

Section: Introductionmentioning

confidence: 99%

Rainfall–runoff response and event-based runoff coefficients in a humid area (northwest Spain)

Rodríguez‐Blanco

Taboada-Castro

2012

Hydrological Sciences Journal

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The hydrological response of a small agroforestry catchment in northwest Spain (Corbeira catchment, 16 km 2 ) is analysed, with particular focus on rainfall events. Fifty-four rainfall-runoff events, from December 2004 to September 2007, were used to analyse the principal hydrological patterns and show which factors best explain the hydrological response. The nonlinearity between rainfall and runoff showed that the variability in the hydrological response of the catchment was linked to the seasonal dynamics of the rainfall and, to a lesser extent, to evapotranspiration. The runoff coefficient, estimated as the ratio between direct runoff and rainfall volume, on an event basis, was analysed as a function of rainfall characteristics (amount and intensity) and the initial catchment state conditions prior to an event, such as pre-event baseflow and antecedent rainfall index. The results revealed that the hydrological response depends both on the soil humidity conditions at the start of the event and on rainfall amount, whereas rainfall intensity presented only a significant correlation with discharge increment. The antecedent conditions seem to be a key point in runoff production, and they explain much of the response. The hydrographs are characterized by a steep rising limb, a relatively narrow peak discharge and slow recession limb. These data and the observations suggest that the subsurface flow is the dominant runoff process.Key words rainfall-runoff events; temporal variability; runoff coefficient; subsurface flow; agroforestry catchment; northwest Spain Réponse pluie-débit et coefficients de ruissellement événementiels dans une région humide (nordouest de l'Espagne) Résumé La réponse hydrologique d'un petit bassin versant agroforestier du nord-ouest de l'Espagne (bassin versant de Corbeira, 16 km 2 ) est analysée, avec un accent particulier sur les événements pluvieux. Cinquante-quatre événements pluie-débit, de décembre 2004 à septembre 2007, ont été utilisés pour analyser les traits hydrologiques principaux et montrer quels facteurs expliquent le mieux la réponse hydrologique. La non-linéarité entre les pluies et le ruissellement montre que la variabilité de la réponse hydrologique du bassin versant est liée à la dynamique saisonnière de la pluie et, dans une moindre mesure, à l'évapotranspiration. Le coefficient de ruissellement, estimé comme le rapport entre le volume de ruissellement direct et celui des pluies, sur une base événementielle, a été analysé en fonction des caractéristiques des pluies (quantité et intensité) et les conditions initiales des états du bassin avant événement, telles que l'écoulement de base pré-événement et l'indice des pluies antérieures. Les résultats ont révélé que la réponse hydrologique dépend à la fois des conditions d'humidité du sol au début de l'événement (indirectement déduites de l'écoulement de base au début de chaque épisode de pluie) et de la quantité de pluie, tandis que l'intensité des précipitations n'a présenté une corrélation significative qu'avec les in...

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“…This seasonality significantly changes the dominant processes through the year (Kirkby, 2005) and makes these rivers particularly vulnerable to anthropogenic pressure. Temporary rivers have been exploited by mankind for millennia because they represent an important source of water in semiarid areas.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a benthic microbial community in a riverine environment subject to hydrological fluctuations (Mulargia River, Italy)

et al. 2010

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Temporary rivers are characterized by recurrent dry phases, and global warming will stress their hydrology by amplifying extreme events. Microbial degradation and transformation of organic matter (OM) in riverbed sediment are key processes with regard to carbon and nutrient fluxes. In this study, we describe structural and functional changes of benthic microbial communities in a riverine environment subject to hydrological fluctuation. Sampling was carried out in the outlet section of the Mulargia River (Sardinia, Italy) under various water regimes, including one flood event. Overall, sediments were characterized by low bacterial cell abundance (range 0.6-1.8 9 10 9 cell g -1 ) as a consequence of their low nutrient and OM concentrations. No major differences were found in the community composition. Alpha-Proteobacteria dominated during the whole year (range 21-30%) followed by Beta-Proteobacteria, Gamma-Proteobacteria, and Cytophaga-Flavobacteria which always contributed \18%. Planctomycetes and Firmicutes were found in smaller amounts (\7%). In spring, when the highest total organic carbon content was also detected (0.42% w/w), both bacterial abundance and C production (BCP, 170 nmol C h -1 g -1 ) reached relatively high values. During the flood event, an increase in BCP and the highest values of community respiration (CR, 74 nmol C h -1 g -1 ) were observed. Moreover, most of the extracellular enzyme activities (EEA) changed significantly during the flood. The variation of the water flow itself can explain part of these changes and other factors also come into play. The presence of different patterns of functional parameters could suggest that the quality of the OM could be the major driving force in nutrient flux.

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Organization and Process

Cited by 14 publications

References 14 publications

A priori parameter estimates for a distributed, grid-based Xinanjiang model using geographically based information

A priori parameter estimates for a distributed, grid-based Xinanjiang model using geographically based information

Rainfall–runoff response and event-based runoff coefficients in a humid area (northwest Spain)

Dynamics of a benthic microbial community in a riverine environment subject to hydrological fluctuations (Mulargia River, Italy)

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