The prime objective of this research is to study and examine the groundwater decline and its effect on the quality of groundwater in aquifer of Torbat Jam plain for a period of 19 years. Torbat Jam plain stretching over an area of about 3500 km2, in northeastern part of Iran. The plain is considered as a semi-arid to arid zone. It has gained substantial importance because of agricultural prospe...

Soil degradation induced by gully erosion represents a worldwide problem in the many arid and semi-arid countries, such as Iran. This study assessed: (1) importance of variables that control using Boruta algorithm, (2) relationship among causative gullied locations evidential belief function model (EBF), (3) development algorithms boosted regression tree (BRT) support vector machine (SVM). Base...

Overgrazing affects plant communities, and is a significant disturbance factor in arid and semi-arid regions. The immediate changes of plant communities after overgrazing in the disturbed arid ecosystems of Iran have been poorly studied. We recorded data from 100 random samples before and after overgrazing in the Golbahar plain located in the northeastern Iran to determine the changes in the pl...

Particulate matters have detrimental effects on human health, environment and economic. This pollutant may emit from anthropogenic or natural sources. On global scale, main proportion of natural particulate matter release to the atmosphere because of wind erosion from arid and semi-arid regions. Recently, the amount of dust coming from Arabian countries has dramatically increased, especially du...

hydrological drought analysis using sdi index in halilrud basin of iran abstract nowadays, drought is considered as damaging environmental phenomenon which affects natural resources and social communities. therefore it will be an important issues that magnitude and effects of these phenomena to be considered. to do this we used l-moment method for regional homogeneity testing. the streamflow dr...