| Title: |
The WIND-O-V field experiment: WIND erOsion in presence of sparse Vegetation |
| Authors: |
Rajot, Jean Louis; Bergametti, G.; Labiadh, Mohamed, Taieb; Alfaro, S., C; Bonnefond, J. -M.; Bouet, Christel; Chevaillier, Servanne; Fernandes, Royston; Feron, Anais; Garrigou, Didier; Guillet, Anne-Charlotte; Hease, Patrick; Henri Des Tureaux, Thierry; Khalfallah, B.; Lafon, Sandra; Lamaud, Eric; Laurent, Benoit; Ltifi, Mohsen; Marticorena, Beatrice; Pierre, Caroline; Sekrafi, Saâd; Zapf, Pascal; Dupont, Sylvain |
| Contributors: |
Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)); Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS); Institut des Régions Arides (IRA) |
| Source: |
INTERNATIONAL CONFERENCE ON AEOLIAN RESEARCH 2018 ; https://hal.science/hal-02330058 ; INTERNATIONAL CONFERENCE ON AEOLIAN RESEARCH 2018, Jun 2018, Bordeaux, France |
| Publisher Information: |
CCSD |
| Publication Year: |
2018 |
| Subject Terms: |
Saltation; Dust emission; Size-resolved fluxes; Gradient method; Eddy covariance method; Chemical composition; [SDE]Environmental Sciences; [SDE.MCG]Environmental Sciences/Global Changes; [SDU]Sciences of the Universe [physics]; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere |
| Subject Geographic: |
Bordeaux; France |
| Description: |
International audience ; Wind erosion in semiarid areas is a major threat for the soil productivity as it impoverishes soil in organic matters and nutrients. Compared to desert regions, these regions are characterized by sparse seasonal vegetation that impacts the erosion process. Semiarid areas face two major evolutions that may modify their wind soil erosion in the future: (1) climate change, with a modification of the amplitude and frequency of precipitations, affecting the surface vegetation cover, and (2) population growth, generating a considerable human pressure on the land use. Characterizing wind erosion in such complex regions is, therefore, crucial and challenging. In order to better predict the amount and composition of emitted dust from semiarid areas, a novel field experiment named WIND-O-V (wind erosion in presence of sparse vegetation) has been performed in 2017 and 2018 in South Tunisia. The originality of this experiment is (1) to cover successively a plot without and with sparse vegetation, and (2) to combine detailed measurements of wind dynamics (including turbulence), size-resolved saltation and dust fluxes, and erosion-flux compositional fractionation along the soil-saltation-suspension continuum. The experiment took place from March to May in the experimental range of the Institut des Régions Arides (IRA) of Médenine (Dar Dhaoui, 25 km east of Médenine). The site approximates a flat half-circle plot of 150 m radius where measurements were performed at the center of the circle in order to ensure a fetch of at least 150 m. In 2017, the surface has been tilled with a disc plough and levelled with a wood board in order to meet the conditions of an ideal flat bare soil without soil crust or ridges. In 2018, sparse vegetation consisting of barley tufts have been grown on the plot with a 3.3 m wide regular arrangement. Three types of measures were carried out. Meteorology: on a 9 m high mast erected at the center of the plot, turbulent velocity components and air temperature fluctuations were ... |
| Document Type: |
conference object; still image |
| Language: |
English |
| Availability: |
https://hal.science/hal-02330058 |
| Accession Number: |
edsbas.540230E1 |
| Database: |
BASE |