Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Egypte → Marginal Waters For Irrigation And Related Soil Erosion And Solute Transport

Suez Canal University (2002)

Marginal Waters For Irrigation And Related Soil Erosion And Solute Transport

Abdel-Mageed, Yasser Ahmed Hamed

Titre : Marginal Waters For Irrigation And Related Soil Erosion And Solute Transport

Auteur : Abdel-Mageed, Yasser Ahmed Hamed.

Etablissement de soutenance : Suez Canal University

Grade : Doctor of Philosophy (PhD) 2002

Résumé
Water scarcity is one of the greatest problems facing countries in arid and semiarid region. This problem force.- ; them to use marginal water of low quality and quantity for irrigation. These kinds of waters have many associated problems. These problems appear during collection, storage and use of these waters. The main problems may be : soil erosion as a result of rainfall action, siltation a ! the bottom of reservoirs constructed to harvest water, infiltration of saline water and pollution bringing the risk to the soil and the groundwater. The present study aimed to investigate these problems. In order to achieve this aim. observation techniques were monitored to measure the different important variables (water content, ;soil salinity and soil water salinity). This investigation was partly done in laboratory experiments. These experiments aimed at comparing devices for measuring salinity (Time Domain Reflectometry TDR and Sigma Probe SP). Soil solution electrical conductivity (o ;..) from time domain reflectometry (TDR) and Sigma Probe (Sp) measurement techniques was compared in the laboratory experiment using seven different soil types over a wide range of water contents (0). We concluded that the differences between the techniques could probably be attributed to the different sampling volume and !he different measuring frequency. Using the SP with a default soil speCific parameter Ko value or 4.1, gave a ow that W\IS +- 20% of the true (Ji” when cr,..>l dS m-1 in all examined soil types. Tire TDR measurements of cr,., using a conventional aw• cr._ O model were more accurate in all soil types.

Présentation étendue (EULC)

Page publiée le 14 janvier 2016, mise à jour le 15 février 2019