The environmental pollution of lake systems due to anthropogenic factors is of growing concern worldwide. Manzala Lake is the largest northern coastal-deltaic lakes of Egypt and has socioeconomic impacts. In this study, the concentrations and origins of seven heavy metals (HMs) and the organic content in the Manzala Lake sediments were explored during the winter and summer. The concentration of ... Read more

The adverse environmental effects of mine tailings disposal on the surrounding ecosystems are worldwide environmental problems. Due to environmental issues related to tailings discharged on land surface, detailed tailings characterization is a prerequisite for a long-term management solution. The tailings from four gold mines in Egypt, namely Fatira, El Sid, Barramiya, and Atud were investigated for their geochemical-mineralogical features and ... Read more

This research aims to determine the effects of wastewater irrigation on the groundwater quality west of Girga, Sohag, Egypt. Twenty-six groundwater and one sewage-treated effluent samples were analyzed using standard methods for a range of physio-chemical and microbiological parameters. Surrounding the wastewater plant, about 46% of collected samples were impacted by wastewater contamination, as indicated by positive detections of fecal ... Read more

Although Egypt has limited rainfall events, flashfloods are responsible for huge losses of lives and infrastructure. In this study, the geomorphometric parameters of the hydrographic basins in the area west of Sohag city, Upper Egypt was carried out. Stream orders, lengths and numbers, bifurcation ratio, drainage frequency and density, circularity and elongation ratios for 16 drainage basins in the study ... Read more

Alteration of abandoned mine sites and wastes generates variable secondary mineral phases that incorporate different toxic trace elements with a prospective threat to the neighboring ecosystems. The main focus of this study was to investigate the mineralogical and geochemical changes at neutral pH where dry condition prevails around oxidation-primary contacts interface and the surface in Um Gheig Pb/Zn mine, Eastern ... Read more

_Calculate the CIA index_ Read more

_STONE GENERALLY USED FOR ROADSTONE AGGREGATE: _ a) Sandstone. b) Limestone. c) Basalt. d) Schist. _EXCESSIVE WATER CAN BE INSTRUMENTAL IN REDUCING SHEAR STRENGTH AND PROMOTE MOVEMENT OF ROCK AND SEDIMENT DOWNSLOPE UNDER THE PULL OF GRAVITY BY:_ a) Reducing the natural cohesiveness between grains. b) Reducing friction at the base through increased fluid pressure. c) Decreasing gravitational attraction of ... Read more

الرسم التوضيحي يمثل قطاع عرضي لجزء من القشرة الأرضية والمطلوب : * ذكر المخاطر الجيولوجية التي يمكن أن تتواجد بالمنطقة. * تحديد أي الأماكن تُفَضل، ولماذا؟ أ- لبناء منطقة سكنية. ب- للتخلص من النفايات الصلبة. Read more

في ضوء العلاقة ما بين الأكسجين الذائب في الماء والأكسجين البيوكيميائي، أرسم العلاقة بينهما مع توضيح النطاقات المختلفه كما هو موضح في الرسم التالي: Read more

A point source discharges organic waste into a stream. Which of the following graphs best depicts the expected pattern for dissolved oxygen (DO) in this stream as a function of distance from the discharge point? Read more