يبدو أن عمليات براءات الإختراع وملكية الإكتشافات لا تسجل بسهولة في مصر ولذلك أعلن أستاذ الجيولوجيا بجامعة أسيوط خالد عبدالقادر عودة عن إكتشافة واحات في بحر الرمال وأدلة وصول مياه الخزان النوبي إليها جوفياً، وأعلن ذلك خشية سرقة إكتشافه. هل وصل الأمر إلي هذا الحد في مصر؟! حتي بعد الثورة! وإذا كان هذا حال أستاذ … Continue reading »
Tagged with Hydrogeology …
Specific Storage
Storativity (S) and specific storage (Ss) are other measures, these for amount of water absorbed or expelled as head either increases or decreases, due to mineral skeleton either expanding or contracting. Confined aquifer: S = b x Ss Unconfined aquifer: S = Sy + bSs Since Sy > bSs in Unconfined aquifer, a rule of … Continue reading »
Aquifers Properties: Storativity
Cross-posted on Yes Network here. The volume of water an aquifer releases from or takes into storage per unit surface area of the aquifer per unit change in head. It is equal to the product of specific storage and aquifer thickness. In an unconfined aquifer, the storativity is equivalent to the specific yield. Also called … Continue reading »
Aquifers Properties: Specific Yield and Specific Retention
Cross-posted on Yes Network here. In an aquifer with a water table (unconfined aquifer), the volume of water released from groundwater storage per unit surface area of aquifer per unit decline in the water table is known as the specific yield, Sy. also known as the drainable porosity. Hydrologists divide water in storage in the … Continue reading »
Aquifers Properties: Porosity (n)
Cross-posted on Yes Network here. The porosity of a soil or rock is that fraction of a given volume of material that is occupied by void space, or interstices. Porosity, indicated by the symbol (n), is usually expressed as the ratio of the volume of voids. Most rocks naturally contain a certain percentage of voids that … Continue reading »
Aquifers Properties
In the next days I’ll blog about aquifers properties and it’s importance to evaluated an aquifer. It will be series blogs for the most important aquifers properties as below. Click on each properties to read about it. Aquifers Properties: 1- Porosity 2- Specific Yield and Specific Retention 3- Storativity 4- Specific Storage 5- Hydraulic Conductivity … Continue reading »
