Introduction The Islamic Republic of Iran (Figure 1) has an area of 1,648,000 km 2 and a population of 65 million people (1995 estimate). The country has arid and semiarid climates and the occurrence of rainfall is unreliable, with a coefficient of variation as high as 70%. The average annual precipitation over the country is around 250 mm. Two mountain ridges, the Alborz and Zagros (Figure 1),...

With regard to the importance of instantaneous peak discharge estimation for watershed management study, and due to the lack of and unqualified climatic and hydrologic data for estimation and measurement in countries such as Iran, researchers were obliged to establish a link between constant parameters (geomorphologic) and variables (hydrologic) to present models with minimum dependence on clim...

Although hypersaline environments pose challenges to life because of the low water content (water activity), many such habitats appear to support eukaryotic microbes. This contribution presents brief reviews of our current knowledge on eukaryotes of water-column haloclines and brines from Deep Hypersaline Anoxic Basins (DHABs) of the Eastern Mediterranean, as well as shallow-water hypersaline m...

For the first time in more than 100 years, a new western Palaearctic species of Heloridae is described. Specimens of Helorus alborzicus Izadizadeh, van Achterberg & Talebi sp. nov. and Helorus ruficornis Förster were collected from the Alborz province of Iran. An illustrated identification key for Western Palaearctic Heloridae is provided.

introduction identification of active tectonic areas, especially in convergent zone are very important because of their potential risks. nowadays, there are several algorithms that are used for tectonic analysis; one of them is tecdem that is used in this research. in this study, using remote sensing techniques, geomorphometric analysis and fieldwork were conducted to analyze morphometric and g...

introduction landslide is a geologic process that occurs over a wide variety of spatial and temporal scales in many mountainous landscapes. landslides have a correspondingly wide range of effects that depends strongly on their spatial pattern of occurrence and frequency and magnitude of movement. mass movements can be the dominant source of erosion responsible for the long-term geomorphic evolu...

We describe a new species of mite from Iran--Reticulolaelaps hallidayi Joharchi, Nemati & Babaeian sp. nov. (Acari: Laelapidae). The new species was collected in a nest of Tapinoma sp. (Hymnoptera: Formicidae) in Taleghan city, Alborz Province and in soil in Khuzestan province in southwestern Iran. Reticulolaelapsfaini is reported for the first time from Iran. The genus Reticulolaelaps is redes...

The Alborz mountain range in northern Iran is part of the active and seismic Alpide belt, where assessing hazards crucial due to region’s history large instrumental earthquakes destructive background. Moment rate estimation, which quantifies tectonic activity, offers a novel approach understanding energy potential regions. In this study, regional perspective employed investigate maximum horizon...