One of the important purposes of hydrology is to ensure water supply in accordance with the quality criteria for agricultural, industrial, and drinking water uses. The groundwater is the main source of water supply in arid and semi-arid regions. This study was conducted to evaluate factors regulating groundwater quality in Rafsanjan plain. A total of 1040 groundwater samples randomly were colle...

Climate change has resulted in increased vulnerability of smallholder farmers in marginal areas of Zimbabwe where there is limited capacity to adapt to changing climate. One approach that has been used to adapt to changing climate is in-field water harvesting for improved crop yields in the semi- arid regions of Zimbabwe. This review analyses the history of soil and water conservation in Zimbab...

Nomadism is found mostly in marginal areas which support only relatively sparse populations, particularly in the arid and semi-arid regions of Africa and Asia. It is a traditional form of society that allows the mobility and flexibility necessary for relatively even use of vegetation over large areas of low quality rangeland. It also facilitates more social interaction than would be possible am...

Floods rarely occur in hyper-arid deserts and little is known about the magnitude frequency of sediment delivery from their basins, despite importance to changes landscape, infrastructures engineering activities. Sediment yield Nahal Nehushtan watershed (11.9 km2) located Timna Valley southern Israel was determined by assessing stratigraphic sections its 60-year reservoir deposits. Stratigraphi...

The 2030 Agenda for Sustainable Development aims to reach 17 Goals (SDGs). SDGs 6 deals with water security, which refers mainly ensure availability and sus-tainable management of water. present study enhance reservoir performance under climate change deal scarcity. For this purpose, we proposed a new methodology where precipitation evaporation data provided through temporal downscaling are lev...

heavy rains are one of the features of arid and semi arid climates which result in flood. this kind of rainfall originates from environmental and synoptic conditions. mediterranean cyclones are the major factor in heavy rainfall in iran, but these cyclones do not happen in some parts of iran such as southern and southeastern areas. in this study, it has been tried to pinpoint the synoptic reaso...

COVER False-colored laser confocal fl uorescence photomicrograph of Microcoleus vaginatus PCC9802 (blue) and Microcoleus steenstrupii SON82 (red) (image width: 0.3 millimeters). These two cyanobacterial strains are representative of the most abundant microbes in soil crusts of the arid lands in the western United States. M. vaginatus favors cooler climates, whereas M. steenstrupii prefers warme...

COVER False-colored laser confocal fl uorescence photomicrograph of Microcoleus vaginatus PCC9802 (blue) and Microcoleus steenstrupii SON82 (red) (image width: 0.3 millimeters). These two cyanobacterial strains are representative of the most abundant microbes in soil crusts of the arid lands in the western United States. M. vaginatus favors cooler climates, whereas M. steenstrupii prefers warme...