SIMULATION DU COMPORTEMENT DES ECOULEMENTS D'EAU EN UTILISANT LE RESEAU HYDROLOGIQUE D'UN BASSIN VERSANT : CAS DE L ´OUED BENIMESSOUS, ALGÉRIE

International audienceAlgeria, vast country, known for its mountain chains is confronted with problems related to runoff, strong rivers flow and flooding in depressions zones. One of the most important aspects for the management of water resources is the good knowledge about the hydrographic network. In this context, the work presented is a contribution for a methodological approach using satellite image data for the generation of Digital Terrain Models (DTM) and the extraction of hydrological networks parameters. We have applied this methodology in a study of the Oued Benimessous drainage area located to the west of Algiers(the capital).In the first step, we have developed an Interferometric processor for the generation of a DTM from a radar image couple of ERS1 / 2 tandem data set and we calculated geomorphometry parameters. For the description of the water runoff we determined, in the second step, flow map directions using the D8 model, local and global drainage and the hydrological network. Also, we have proposed, a simulation of different weather situations by changing precipitation water quantities.L'Algérie, pays vaste, connu pour ses chaînes montagneuses est confronté aux problèmes des écoulements et des ruissellements des cours d'eau et d'accumulation des eaux dans les zones à fortes dépressions. Un des aspects les plus importants dans la gestion des ressources en eau est le réseau hydrographique des différentes régions. Dans ce contexte, le travail que nous présentons est une contribution dans une démarche méthodologique de traitement des images satellitaires et d'extraction de réseaux hydrologiques des bassins versants à partir de Modèles Numériques de Terrain (MNT). Nous l'avons appliquée sur une région située à l'Ouest d'Alger (la capitale) et nous nous sommes intéressés, à l'aspect applicatif de cette méthodologie pour l'étude du bassin versant de Oued Benimessous situé dans cette région. Dans la première étape, nous avons développé un processus interférométrique de génération de MNT à partir d'un couple d'images radar ERS1/2 en tandem puis nous avons calculé les paramètres de géomorphométrie. Pour la description du comportement des écoulements d'eau, nous avons déterminé, dans la deuxième étape, la carte des directions d'écoulement selon le modèle D8, la carte de drainage local et global ainsi que le réseau hydrologique. Nous avons proposé ensuite, une procédure de simulation avec différentes situations en modifiant la quantité d'eau des précipitations

First record of the leafhopper Platymetopius notatus Fieber (Hemiptera, Cicadellidae, Deltocephalinae) from northwest Algeria with description of the species

A continuous monitoring of leafhoppers in a pear orchard of Santa maria variety located in Khemis Miliana in the northwest Algeria for a period of 7 months from February to August 2019 revealed a species, Platymetopius notatus Fieber, earlier reported from Europe (Spain, Portugal). The species is reported in two African countries (Morocco and Tunisia).The species is recorded for the first time from Algeria. The species is described and illustrated including both male and female genitalia

First record of the leafhopper Platymetopius notatus Fieber (Hemiptera, Cicadellidae, Deltocephalinae) from northwest Algeria with description of the species

A continuous monitoring of leafhoppers in a pear orchard of Santa maria variety located in Khemis Miliana in the northwest Algeria for a period of 7 months from February to August 2019 revealed a species, Platymetopius notatus Fieber, earlier reported from Europe (Spain, Portugal). The species is reported in two African countries (Morocco and Tunisia).The species is recorded for the first time from Algeria. The species is described and illustrated including both male and female genitalia

Chemical Composition and Antimicrobial Activity of Essential Oils from the Aerial Parts of Asteriscus graveolens (Forssk.) Less. and Pulicaria incisa (Lam.) DC.: Two Asteraceae Herbs Growing Wild in the Hoggar

In recent years, antimicrobial activities of essential oils have been intensively explored, mainly in researching and developing new antimicrobial agents to overcome microbial resistance. The present study investigates the chemical composition and antimicrobial activities of essential oils obtained from two Asteraceae: Asteriscus graveolens (Forssk.) Less. and Pulicaria incisa (Lam.) DC. Chemical analysis was performed using a combination of capillary GC-FID and GC/MS analytical techniques. The major component of Asteriscus graveolens were cis-chrysanthenyl acetate (31.1%), myrtenyl acetate (15.1%) and kessane (11.5%), while for Pulicaria incisa the main components were chrysanthenone (45.3%) and 2,6-dimethylphenol (12.6%). The oils obtained from the aerial parts were tested against sixteen microbial strains by agar well diffusion technique and dilution methods and showed minimum inhibitory concentrations (MIC) in the range of 19-1250 μg/mL. A good antibacterial activity against a common nosocomial pathogen, Acinetobacter baumannii ATCC 19606 was observed, especially from Pulicaria incisa essential oil, with a MIC value up to 19 μg/mL. These results give significant information about the pharmacological activity of these essential oils, which suggest their benefits to human health, having the potential to be used for medical purposes. This article is protected by copyright. All rights reserved

Contextual Filtering Methods based on the Subbands and Subspaces Decomposition of Complex SAR Interferograms

International audienc

Abstracts of 1st International Conference on Computational & Applied Physics

This book contains the abstracts of the papers presented at the International Conference on Computational & Applied Physics (ICCAP’2021) Organized by the Surfaces, Interfaces and Thin Films Laboratory (LASICOM), Department of Physics, Faculty of Science, University Saad Dahleb Blida 1, Algeria, held on 26–28 September 2021. The Conference had a variety of Plenary Lectures, Oral sessions, and E-Poster Presentations. Conference Title: 1st International Conference on Computational & Applied PhysicsConference Acronym: ICCAP’2021Conference Date: 26–28 September 2021Conference Location: Online (Virtual Conference)Conference Organizer: Surfaces, Interfaces, and Thin Films Laboratory (LASICOM), Department of Physics, Faculty of Science, University Saad Dahleb Blida 1, Algeria