Rainfall, runoff and sediment transport in a Mediterranean mountainous catchment

Tuset, Jordi; Vericat, Damià; Batalla, Ramón J.

doi:10.1016/j.scitotenv.2015.07.075

Cited by 82 publications

(59 citation statements)

References 77 publications

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“…This method was based on the hypothesis that, as the catchment of the Tenryu River is a hilly area, the response time of rainfall would be very quick compared to the time scale of the flow model. This hypothesis is also supported by some other studies [17, 18], which describe that an antecedent rainfall in the watershed is one of most relevant factors controlling the hydrological response of a river. Based on this hypothesis a simple relationship (Eq 1) was developed between precipitation and runoff to convert annually averaged flows to monthly averaged flows: …”

Section: Construction Of the Numerical Model With Hec-rassupporting

confidence: 81%

Qualitative simulation of bathymetric changes due to reservoir sedimentation: A Japanese case study

Bilal

Dai²,

Larson

et al. 2017

PLoS ONE

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Sediment-dynamics modeling is a useful tool for estimating a dam’s lifespan and its cost–benefit analysis. Collecting real data for sediment-dynamics analysis from conventional field survey methods is both tedious and expensive. Therefore, for most rivers, the historical record of data is either missing or not very detailed. Available data and existing tools have much potential and may be used for qualitative prediction of future bathymetric change trend. This study shows that proxy approaches may be used to increase the spatiotemporal resolution of flow data, and hypothesize the river cross-sections and sediment data. Sediment-dynamics analysis of the reach of the Tenryu River upstream of Sakuma Dam in Japan was performed to predict its future bathymetric changes using a 1D numerical model (HEC-RAS). In this case study, only annually-averaged flow data and the river’s longitudinal bed profile at 5-year intervals were available. Therefore, the other required data, including river cross-section and geometry and sediment inflow grain sizes, had to be hypothesized or assimilated indirectly. The model yielded a good qualitative agreement, with an R2 (coefficient of determination) of 0.8 for the observed and simulated bed profiles. A predictive simulation demonstrated that the useful life of the dam would end after the year 2035 (±5 years), which is in conformity with initial detailed estimates. The study indicates that a sediment-dynamic analysis can be performed even with a limited amount of data. However, such studies may only assess the qualitative trends of sediment dynamics.

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Section: Construction Of the Numerical Model With Hec-rassupporting

confidence: 81%

Qualitative simulation of bathymetric changes due to reservoir sedimentation: A Japanese case study

Bilal

Dai²,

Larson

et al. 2017

PLoS ONE

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“…For instance, in the Magdalena drainage, Colombia, the observed sediment yield was mainly influenced by mean annual runoff and runoff explained 51% of the variance in sediment yield [8]. In a Mediterranean mountainous catchment in the NE Iberian Peninsula, suspended sediment concentrations and sediment load were largely correlated with flood magnitude and the amount of direct runoff, respectively [11]. However, similar research in different parts of the world could also give rise to different findings.…”

Section: Relationships Of Sediment Load Between Runoff Mwl Pf and Lfmentioning

confidence: 97%

“…[5,6]. Considerable research has been conducted on how factors control sediment yield in a basin (e.g., land use change [7], land slopes [8], weather types [9], and precipitation or other climatic variables change [10][11][12][13][14]), the spatial-temporal change of sediment concentration and Runoff-Sediment Relationship (RSR) [15,16], and the scale effect of RSR [17][18][19]. These studies provided important trend data and are useful for understanding sediment rich water energy resources [22,27].…”

Section: Introductionmentioning

confidence: 99%

Response of Sediment Load to Hydrological Change in the Upstream Part of the Lancang-Mekong River over the Past 50 Years

Gui

et al. 2018

Water

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Sediment load and its response to the variations of the hydrological elements are important for the healthy utilization of a river. In this study, the response of sediment load to hydrological change was explored in the upstream part of the Lancang-Mekong River, a major transboundary river originating from the Tibetan Plateau and running through China, over the past 50 years. A sediment rating curve for the Jiuzhou Station was developed based on the available SSC-Q (suspended sediment concentration (SSC) and flow) data and trends in annual precipitation, runoff, peak flow (PF), low flow (LF), maximum water level (MWL), and sediment load were analyzed from 1957 to 2006. The correlation analysis method and Random Forest (RF) were adopted to qualitatively and quantitatively quantify the contribution of each hydrological element to the sediment load change. Results indicated that both the runoff and sediment load showed a significantly upward trend, especially after 1979, at the 95% confidence level. The sediment load had significantly positive correlations with runoff, PF, and MWL at the 99% confidence level, respectively. In particular, the sediment load had the largest significant positive correlation with runoff since 1980. Runoff had the largest variable importance to the sediment load change, followed by PF, MWL, precipitation, and LF. The increasing trend in the sediment load was mainly attributed to the increase of runoff in the upstream part of the Lancang-Mekong River since the mid-1980s.

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“…Therefore, flash floods usually impact basins less than 1000 km 2 (Marchi et al, 2010). In mediumscale Mediterranean catchments, the control exerted by the amount of rainfall and its intensity and variability on the generation of runoff and the erosional processes operating at different scales is of major importance (Navratil et al, 2012;Marra et al, 2014;Tuset et al, 2016). Assisting stakeholders in implementing efficient soil conservation and river management measures implies understanding the processes and the factors that control surface runoff, developing modelling approaches able to provide reliable flow separations, localizing sediment sources and sinks, and predicting the space-time dynamics of sediment and associated contaminant within the catchment.…”

Section: Introductionmentioning

confidence: 99%

A high space–time resolution dataset linking meteorological forcing and hydro-sedimentary response in a mesoscale Mediterranean catchment (Auzon) of the Ardèche region, France

Nord

Boudevillain

Berne

et al. 2017

Earth Syst. Sci. Data

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Abstract.A comprehensive hydrometeorological dataset is presented spanning the period 1 January 2011-31 December 2014 to improve the understanding of the hydrological processes leading to flash floods and the relation between rainfall, runoff, erosion and sediment transport in a mesoscale catchment (Auzon, 116 km 2 ) of the Mediterranean region. Badlands are present in the Auzon catchment and well connected to high-gradient channels of bedrock rivers which promotes the transfer of suspended solids downstream. The number of observed variables, the various sensors involved (both in situ and remote) and the space-time resolution (∼ km 2 , ∼ min) of this comprehensive dataset make it a unique contribution to research communities focused on hydrometeorology, surface hydrology and erosion. Given that rainfall is highly variable in space and time in this region, the observation system enables assessment of the hydrological response to rainfall fields. Indeed, (i) rainfall data are provided by rain gauges (both a research network of 21 rain gauges with a 5 min time step and an operational network of 10 rain gauges with a 5 min or 1 h time step), S-band Doppler dual-polarization radars (1 km 2 , 5 min resolution), disdrometers (16 sensors working at 30 s or 1 min time step) and Micro Rain Radars (5 sensors, 100 m height resolution). Additionally, during the special observation period (SOP-1) of the HyMeX (Hydrological Cycle in the Mediterranean Experiment) project, two X-band radars provided precipitation measurements atPublished by Copernicus Publications. 222G. Nord et al.: High-resolution hydrometeorological data in a mesoscale Mediterranean catchment very fine spatial and temporal scales (1 ha, 5 min). (ii) Other meteorological data are taken from the operational surface weather observation stations of Météo-France (including 2 m air temperature, atmospheric pressure, 2 m relative humidity, 10 m wind speed and direction, global radiation) at the hourly time resolution (six stations in the region of interest). (iii) The monitoring of surface hydrology and suspended sediment is multi-scale and based on nested catchments. Three hydrometric stations estimate water discharge at a 2-10 min time resolution. Two of these stations also measure additional physico-chemical variables (turbidity, temperature, conductivity) and water samples are collected automatically during floods, allowing further geochemical characterization of water and suspended solids. Two experimental plots monitor overland flow and erosion at 1 min time resolution on a hillslope with vineyard. A network of 11 sensors installed in the intermittent hydrographic network continuously measures water level and water temperature in headwater subcatchments (from 0.17 to 116 km 2 ) at a time resolution of 2-5 min. A network of soil moisture sensors enables the continuous measurement of soil volumetric water content at 20 min time resolution at 9 sites. Additionally, concomitant observations (soil moisture measurements and stream gauging) were performed during floo...

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Rainfall, runoff and sediment transport in a Mediterranean mountainous catchment

Cited by 82 publications

References 77 publications

Qualitative simulation of bathymetric changes due to reservoir sedimentation: A Japanese case study

Qualitative simulation of bathymetric changes due to reservoir sedimentation: A Japanese case study

Response of Sediment Load to Hydrological Change in the Upstream Part of the Lancang-Mekong River over the Past 50 Years

A high space–time resolution dataset linking meteorological forcing and hydro-sedimentary response in a mesoscale Mediterranean catchment (Auzon) of the Ardèche region, France

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