Runoff generation, sediment movement and soil water behaviour on calcareous (limestone) slopes of some Mediterranean environments in southeast Spain

Calvo-Cases, Adolfo; Boix‐Fayos, Carolina; Imeson, A.C.

doi:10.1016/s0169-555x(02)00218-0

Cited by 221 publications

(158 citation statements)

References 35 publications

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“…In this area, larger macropores are particularly concentrated under the dominant grasses Lázaro, 2013, 2014), and their emptying would allow them to enhance their role as runoff sinks, making the events separated by 1-hour MIT relatively independent. The importance of the filling and emptying of the macropores was also highlighted by Calvo et al (2003). Nevertheless, for the 30-minute MIT, the effect of the antecedent conditions can be dominant.…”

Section: Discussionmentioning

confidence: 94%

“…This makes hydrological studies difficult in these areas (Heydarpour, 1989). Runoff is a fundamental process because it leads to water redistribution, and it modulates soil water availability and plant functioning (Huxman et al, 2004;Lázaro, 2004;Sánchez and Puigdefábre-gas, 1994), especially in semiarid environments (Aguiar and Sala, 1999;Calvo-Cases et al, 2003;Porporato et al, 2002;Puigdefábregas, 2005); and is highly dependent on rainfall.…”

Section: Introductionmentioning

confidence: 99%

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Rainfall timing and runoff: The influence of the criterion for rain event separation

Molina-Sanchis

Lázaro

Arnau-Rosalén

et al. 2016

Journal of Hydrology and Hydromechanics

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Rain is not uniform in time and space in semiarid areas and its distribution is very important for the runoff process. Hydrological studies usually divide rainfall into events. However, defining rain events is complicated, and rain characteristics vary depending on how the events are delimited. Choosing a minimum inter-event time (MIT) is a commonly used criterion. Our hypothesis is that there will be an optimal MIT that explains the maximum part of the variance of the runoff, with time to runoff used as a surrogate. The objective is to establish a procedure in order to decide upon this optimal MIT. We developed regressions between time to runoff (T 0 ) and three descriptive variables of rain. Our results show that the optimum MIT is 1 hour, which seems to be the minimum period of time required for water in larger macropores to drain and sufficiently modify the effect of antecedent soil moisture on the runoff generation process. Rain events are classified into three significantly different groups: (1) large and intense rains, (2) light rains on wet soil, and (3) light rains on dry soil. Intense rains produce most of the runoff, but there were significant differences between small events in the runoff generated. Of rain events, 63.75% are single-tip events, and many could be dew.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Rainfall timing and runoff: The influence of the criterion for rain event separation

Molina-Sanchis

Lázaro

Arnau-Rosalén

et al. 2016

Journal of Hydrology and Hydromechanics

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“…The sensitivity analysis indicates that PR estimates using approaches 2a and 2b suffer from high uncertainty due to the spatial variation of y. The high variability in surface cover, which is a mosaic of shrub, rock fragments and grass (Li et al, 2008) -characteristic of the study site -configures a complex matrix of structures acting as sources (bare patches) and sinks (vegetated patches) of soil water (Calvo-Cases et al, 2003), which also affect y heterogeneity and PR. In general, vegetation type also significantly impacts recharge rate (Lerner et al, 1990;Keese et al, 2005).…”

Section: Approachmentioning

confidence: 99%

Temporal dynamics of soil water balance components in a karst range in southeastern Spain: estimation of potential recharge

Cantón

Villagarcı́a

Moro

et al. 2010

Hydrological Sciences Journal

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This paper analyses the temporal dynamics of soil water balance components in a representative recharge area of the Sierra de Gádor (Almeria, southeastern Spain) in two hydrological years. Two approaches are used to estimate daily potential recharge (PR): Approach 1 based on deriving PR from the water balance as the difference between measurements of rainfall (P) and actual evapotranspiration (E) obtained by eddy covariance; and Approach 2 with PR obtained from the dynamic pattern of the soil moisture (y) recorded at two depths in the site's thin soil (average 0.35 m thickess). For the hydrological year 2003/04, which was slightly drier than the 30-year average, E accounted for 64% of rainfall and occurred mainly in late spring and early summer. The PR estimated by Approach 1 was 181 AE 18 mm year -1 (36% of rainfall), suggesting an effective groundwater recharge in the study area. In the unusually dry hydrological year 2004/05, E was about 215 mm year -1 , close to the annual rainfall input, and allowing very little (8 AE 12 mm year -1 ) PR according to Approach 1. Estimation of PR based on Approach 2 resulted in PR rates lower than those found by Approach 1, because Approach 2 does not take into account the recharge that occurs through preferential flow pathways (cracks, joints and fissures) which were not monitored with the y probes. Moreover, using Approach 2, the PR estimates differed widely depending on the time scale considered: with daily mean y data, PR estimation was lower, especially in late spring, while y data at 30 min resolution yielded a more reliable prediction of the fraction of total PR resulting from the downward movement of soil water by gravity.Key words potential recharge; evapotranspiration; soil moisture; soil water balance; Mediterranean; Sierra de Gádor Dynamique temporelle des composantes du bilan hydrique du sol dans une chaine karstique du sud-est de l'Espagne: estimation de la recharge potentielle Résumé Ce travail analyse la dynamique temporelle des composantes du bilan hydrique du sol dans une zone de recharge représentative de la Sierra de Gador (Almeria, SE de l'Espagne) pendant deux années hydrologiques. Deux approches ont été utilisées pour estimer la recharge potentielle journalière (RP): dans l'approche 1, RP est calculée à partir de la différence entre les mesures de pluie (P) et d'évapotranspiration réelle (E) obtenues par la méthode de la covariance turbulente; dans l'approche 2, RP est obtenue à partir de l'humidité du sol (y) mesurée à deux profondeurs dans les sols peu profonds du site (épaisseur moyenne de 0.35 m). Pendant l'année hydrologique

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“…We used also regional estimates of ε and p , given by Fiorentino and Iacobellis (2001) and Claps et al (2000), and reported in Table 2.…”

Section: Estimation Of Rainfall Parametersmentioning

confidence: 99%

Runoff thresholds in derived flood frequency distributions

Gioia

Iacobellis

Manfreda

et al. 2008

Hydrol. Earth Syst. Sci.

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Abstract.In general, different mechanisms may be identified as responsible of runoff generation during ordinary events or extraordinary events at the basin scale. In a simplified scheme these mechanisms may be represented by different runoff thresholds. In this context, the derived flood frequency model, based on the effect of partial contributing areas on peak flow, proposed by Iacobellis and Fiorentino (2000), was generalized by providing a new formulation of the derived distribution where two runoff components are explicitly considered. The model was tested on a group of basins in Southern Italy characterized by annual maximum flood distributions highly skewed. The application of the proposed model provided good results in terms of descriptive ability. Model parameters were also found to be well correlated with geomorphological basin descriptors. Two different threshold mechanisms, associated respectively to ordinary and extraordinary events, were identified. In fact, we found that ordinary floods are mostly due to rainfall events exceeding a threshold infiltration rate in a small source area, while the so-called outlier events, responsible of the high skewness of flood distributions, are triggered when severe rainfalls exceed a threshold storage in a large portion of the basin.

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Runoff generation, sediment movement and soil water behaviour on calcareous (limestone) slopes of some Mediterranean environments in southeast Spain

Cited by 221 publications

References 35 publications

Rainfall timing and runoff: The influence of the criterion for rain event separation

Rainfall timing and runoff: The influence of the criterion for rain event separation

Temporal dynamics of soil water balance components in a karst range in southeastern Spain: estimation of potential recharge

Runoff thresholds in derived flood frequency distributions

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