Haraz-Ghareh Su is one of the seven sub-basins of the Caspian basin, located on the southern shores of the Caspian Sea, and as such, is in danger of water crisis due to absence of proper systematic policy and strategy. In this study, the pressure factors on the Haraz-Ghareh Su water resources were identified using DPSIR model. Then, the pressure parameters on the freshwater resources in the Cas...

An invasive species is one that arrives (oftenwith human assistance) in a habitat it had not previously occupied, then establishes a population and spreads autonomously. Species invasions are one of the main conservation threats today and have caused many species extinctions. The great majority of such invasions are by species introduced from elsewhere, although some native species have become ...

Field research into the climatic history and shifting of the East Saharan desert has furnished evidence that during Quaternary time the present extremely arid western part of Upper Nubia (northern Sudan)was temporarily linked to the Nile by way of a hitherto unknown 400 kilometer long tributary. From about 9500 to 4500 years ago, lower Wadi Howar flowed through an environment characterized by n...

freshwater resources represent around 3% of all water on earth, and less than 1% of that is available. consideringcurrent conditions, as well as future predictions of need, freshwater resources cannot meet human needs. thus,sweetening of the brackish water can be performed to provide freshwater for human use. solar energy, because ofiran's climatic conditions, may be used for sweetening the bra...

Haraz-Ghareh Su is one of the seven sub-basins of the Caspian basin, located on the southern shores of the Caspian Sea, and as such, is in danger of water crisis due to absence of proper systematic policy and strategy. In this study, the pressure factors on the Haraz-Ghareh Su water resources were identified using DPSIR model. Then, the pressure parameters on the freshwater resources in the Cas...

The United Arab Emirates is a predominantly arid land containing habitats and communities adapted to survive both small amounts of infrequent precipitation, and extremes of heat with consequent high evaporative losses. It is an exacting environment. Nonetheless, mankind has exploited the land now known as the UAE since the Late Stone Age, 7500 years Before Present (BP), although then the climat...

In the current economic climate, business schools face crucial decisions. As resources become scarcer, schools must either streamline operations or limit them. An efficiency analysis of U.S. business schools is presented that computes, for each business school, an overall efficiency score and provides separate factor efficiency scores, indicating the extent to which the school can reduce each r...

Climate change and impoundment increase river temperatures, shifting the bioclimatic envelope in which freshwater biota have evolved increasing salmonid egg mortality. To mitigate this, conservation flows from reservoirs are often implemented to maintain favourable water temperatures downstream impoundments throughout embryo development. However, as becomes scarcer, there is a need understand r...