| Abstract | Study region: Mediterranean catchment in Algeria Study focus: A procedure to characterise the flow regimes of non-perennial rivers in regions with limited data availability was defined. The specific aims were to adapt the Soil and Water Assessment Tool (SWAT) for simulating time series of daily streamflow in a basin with a temporary river network and to characterise flow regime in a number of the river reaches. An inexpensive streamflow monitoring program was implemented to collect a basic dataset to calibrate the hydrological model. Regional databases, surveys, and images from Google Earth were used to integrate the available data to set up the model. Flow regime was characterised by using a number of metrics describing the aquatic phases (AS) (flow, pool, and dry permanence). New hydrological insights for the region: This study provides a contribution to the unsolved question of the management of temporary rivers under the Mediterranean climate. The Nil Wadi is characterised by perennial and temporary flow regimes. The analysed reaches were classified as "intermittent-pool" and "intermittent-dry", they showed "alternate-fluent" (AF) aquatic phase upstream and in the middle course, and a gradient from AF to "fluent-stagnant" phases downstream. The AS "oligorheic" (low flow or pools connected) and "arheic" (pools disconnected) mainly occurred from May to October. "Dry" condition that includes the ASs "hyporheic" and "edaphic" mainly occurred in summer. |
| Text | 471323 2022 10.1016/j.ejrh.2022.101062 Scopus 2 s2.0 85127139754 Temporary river flow regime; data scarcity; SWAT model River classification Mediterranean Region Characterising flow regimes in a semi arid region with limited data availability The Nil Wadi case study Algeria De Girolamo A.M.; Drouiche A.; Ricci G.F.; Parete G.; Gentile F.; Debieche T. H. Water Research Institute, National Research Council, Bari, Water Research Institute, National Research Council, Bari, Italy, , , Italy; Water Research Institute, National Research Council, Bari, Water Research Institute, National Research Council, Bari, Italy, , , Italy; Geological Engineering Laboratory LGG , University of Mohamed Seddik Benyahia, Jijel, Geological Engineering Laboratory LGG , University of Mohamed Seddik Benyahia Jijel, Algeria, , Algeria; Department of Agricultural and Environmental Sciences, University of Bari Aldo Moro, Bari, Department of Agricultural and Environmental Sciences, University of Bari Aldo Moro, Bari, Italy, , Italy Study region Mediterranean catchment in Algeria Study focus A procedure to characterise the flow regimes of non perennial rivers in regions with limited data availability was defined. The specific aims were to adapt the Soil and Water Assessment Tool SWAT for simulating time series of daily streamflow in a basin with a temporary river network and to characterise flow regime in a number of the river reaches. An inexpensive streamflow monitoring program was implemented to collect a basic dataset to calibrate the hydrological model. Regional databases, surveys, and images from Google Earth were used to integrate the available data to set up the model. Flow regime was characterised by using a number of metrics describing the aquatic phases AS flow, pool, and dry permanence . New hydrological insights for the region This study provides a contribution to the unsolved question of the management of temporary rivers under the Mediterranean climate. The Nil Wadi is characterised by perennial and temporary flow regimes. The analysed reaches were classified as intermittent pool and intermittent dry , they showed alternate fluent AF aquatic phase upstream and in the middle course, and a gradient from AF to fluent stagnant phases downstream. The AS oligorheic low flow or pools connected and arheic pools disconnected mainly occurred from May to October. Dry condition that includes the ASs hyporheic and edaphic mainly occurred in summer. 41 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85127139754 origin=inward Articolo in rivista Elsevier 2214 5818 Journal of Hydrology Regional Studies Journal of Hydrology Regional Studies annamaria.degirolamo DE GIROLAMO ANNA MARIA |
