| Abstract | This study aims to evaluate the suitability of the Soil and Water Assessment Tool model in
simulating runoff and sediment loss in the Carapelle (SE Italy), a typical Mediterranean watershed,
where continuous measurements of streamflow and sediment concentration were collected over
a 5-year period, on a half-hour timescale, processed on a daily timescale. After sensitivity analysis,
the model was calibrated and validated for runoff and sediment. Statistics show generally satisfactory
efficiency. To further improve sediment simulation performance, we used a seasonal calibration
scheme, in which data recorded in the dry and wet seasons were used to calibrate
sediments separately, on a seasonal basis. We also tested the model's capability in identifying
the major sediment source zones and river segments where there is sediment deposition. On
the basin scale, the average water yield (186 mm) corresponds to 27% of the total rainfall
(686 mm), and average annual sediment load was estimated to be 6.8 t ha-1 year-1. On the
subbasin scale, a gradient of sediment yield was found that is characterised by a large difference
among the upper (7 to 13 t ha-1 year-1), central, and lower parts (<1 t ha-1 year-1) of the study
area. Conversely, deposition in channel flow has its highest values in the central part of the watershed,
where there is an alluvial plain. Winter wheat and olive land use are the major source areas,
in terms of sediment. This study confirms that the Mediterranean watershed is a fragile ecosystem,
and measures are needed to mitigate soil depletion.[object Object] |
| Text | 389700 2018 10.1002/ldr.2889 Scopus 2 s2.0 85041907144 ISI Web of Science WOS WOS 000430126700034 Mediterranean watershed sediment calibration sediment source areas sediment yield SWAT model Identifying sediment source areas in a Mediterranean watershed using the SWAT model Ricci G.F.; De Girolamo A.M.; Abdelwahab O.M.M.; Gentile F. Department of Agricultural and Environmental Sciences, University of Bari Aldo Moro, Bari, , Italy; Water Research Institute, National Research Council, Bari, , , Italy; Water Research Institute, National Research Council, Bari, , , Italy; Department of Agricultural Engineering, Faculty of Agriculture, Cairo University, Giza, , , Egypt; Department of Agricultural Engineering, Faculty of Agriculture, Cairo University, Giza, , , Egypt This study aims to evaluate the suitability of the Soil and Water Assessment Tool model in simulating runoff and sediment loss in the Carapelle SE Italy , a typical Mediterranean watershed, where continuous measurements of streamflow and sediment concentration were collected over a 5 year period, on a half hour timescale, processed on a daily timescale. After sensitivity analysis, the model was calibrated and validated for runoff and sediment. Statistics show generally satisfactory efficiency. To further improve sediment simulation performance, we used a seasonal calibration scheme, in which data recorded in the dry and wet seasons were used to calibrate sediments separately, on a seasonal basis. We also tested the model s capability in identifying the major sediment source zones and river segments where there is sediment deposition. On the basin scale, the average water yield 186 mm corresponds to 27% of the total rainfall 686 mm , and average annual sediment load was estimated to be 6.8 t ha 1 year 1. On the subbasin scale, a gradient of sediment yield was found that is characterised by a large difference among the upper 7 to 13 t ha 1 year 1 , central, and lower parts <1 t ha 1 year 1 of the study area. Conversely, deposition in channel flow has its highest values in the central part of the watershed, where there is an alluvial plain. Winter wheat and olive land use are the major source areas, in terms of sediment. This study confirms that the Mediterranean watershed is a fragile ecosystem, and measures are needed to mitigate soil depletion. object Object 29 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85041907144 origin=inward Identifying sediment source areas in a Mediterranean watershed using the SWAT model This study aims to evaluate the suitability of the Soil and Water Assessment Tool model in simulating runoff and sediment loss in the Carapelle SE Italy , a typical Mediterranean watershed, Ricci_et_al 2018 Land_Degradation_Development.pdf Articolo in rivista Wiley, 1085 3278 Land degradation development Print Land degradation development Print Land degrad. dev. Print Land degradation development. Print Land degradation and development Print annamaria.degirolamo DE GIROLAMO ANNA MARIA |
