Environmental Erosion Research
Year:2018 | Volume:8 | Issue:1 (29)|Papers Count:6

1-Introduction: The occurrence of dust storms caused by wind erosion is a process that causes the destruction of land and can also be considered as a desertification indicator (Xu, 2006). Generally, the formation of a dust storm depends on three factors: the presence of strong winds, a sensitive surface to wind erosion and unstable weather conditions (Xia and Yang, 1996). Humans play an important role in the formation of dust storms through changing land use in sensitive areas to sand storms. In the arid and semi-arid areas covered with tiny and unstable materials, land degradation may occur as a result of land use change caused by over-grazing and farming. As a result, wind erosion increases, leading to more sand storms (Xu, 2006)....

1-Introduction: Desertification means land degradation in the arid, semi-arid and dry sub-humid regions because of natural or anthropogenic factors. Desertification is accounted as the third most important global challenge after the crisis of water shortage and drought in the 21st century. Desertification is a problem for many countries, especially the developing countries. Identifying the regions exposed to desertification is so important for combating desertification and leads to better planning. Also the awareness of inappropriate management practices can reduce the intensity of this phenomenon, and prevent its development. There are many models for preparing desertification maps in the world that the most common of which includes UNEP-FAO, ASSOD, GLASSOD, LADA, and MEDALUS. Also in Iran ICD, MICD and recently, IMDPA models have been presented. IMDPA model includes some criteria affecting desertification, and some indicators for the quantitative assessment of the criteria. In this research IMDPA model was used for the assessment of Iranian desertification condition....

1-Introduction: Wind erosion is one the most important factors of land degradation in the arid and semi-arid areas and it is one the most serious environmental problems in the world. In Fars province, 17 cities are prone to wind erosion and are considered as critical zones of wind erosion. One of the most important factors in soil wind erosion is land use/cover change. Therefore, accurate mapping of land use/cover and wind erosion evidences in arid and semiarid regions is the utmost importance. Moreover, for discrimination of land covers resulting from wind erosion such as sand sheets and Nebka, we need accurate remote sensing methods. In this study, capability of the advanced machine learning techniques on Landsat 7 and 8 imageries in mapping land use/cover related to wind erosion is evaluated.....

1-Introduction: Dust storm is a hazardous natural event affecting all creatures. (1). Due to the global warming drought, reduction in precipitation, and mismanagement in the water by humankind, the negative effects of this calamity were more observed (2). With increasing the wind speed, and based on the size of dust particles, land topography, soil humidity, vegetation coverage and some more parameters, the storm is generated (Ataei and Heidari, 2017). Most parts of Iran in South and West are attacked by dust storm coming from some neighboring countries (Liu et al, 2003). About 90% of forests in Ilam, are covered by a valuable tree species, Persian oak (Quercus brantii). The dust storm has become as a big challenge in this area for two last decades (Sayehmiri et al, 2018). The dust reduces the potential water storage (Rasooli et al, 2010), photosynthesis rate, the amount of chlorophyll pigments, carbohydrates reserves and finally leads to tree mortality (Salehi et al, 2018). Therefore, because of the significant effect of dust on the trees and also having no fundamental information on the effects of this event on endemic trees in the national forest, we aimed to evaluate the effects of dust in a controllable condition on the Persian oak....

1-Introduction: Dust storms are a kind of severe natural disaster indust source regions, which have a negative impact on human health, industrial products and activities. Iran is a dry and low water country, the coincidence of this situation and its position in the global rebound belt has brought about very bad conditions. Repeaters in recent years have been affected by the severity and frequency of major events in Iran and, in terms of environmental issues, studying and managing the reduction of its effects is a priority. In recent years, these events have been the main hazards in areas of South-west Iran. Several complex dust storms have recently occurred in the southwestern part of Iran. Detecting the spatial distribution of dust storms in the deposition regions is an essential step for managing this natural and human-induced crisis. Land measurement and remote sensing techniques are currently two of the most important methods for monitoring dust storms. Traditional reference land measurement methods have little spatial and temporal resolutions, so they can not properly monitor and anticipate dust storms. Due to rapid changes in the nature and location of dust storms, there are limitations in monitoring and relating measurements. Meteorological numerical models can not detect dust storms alone. Today, remote sensing technology is known for providing multiple global and regional images with time, spatial and spectral scales as a useful tool for monitoring, measuring and harvesting dust properties. Also, remote sensing can monitor the range and scope of dust storms, their degree of intensity and their route of movement. In this research, by using MODIS images and applying methods of applying the dust algorithm, dust was monitored. This study aimed to investigate the performance of the Normalized Differences Dust Index (NDDI) applied to MODIS data (01/11/2017) for detection of dust storms in the Southwest of Iran....

1-Introduction: Human beings have always sought to assess changes and discover changes. Soil erosion is one of the most important factors in soil degradation and reduction of fertility. Today, erosion of the soil due to non-expert human intervention has been removed from its natural process and has led to irreparable consequences. Considering the importance of studying changes in land use and its role in soil erosion over time, land use changes in Simineh Rood of the Boukan County in West Azarbaijan province and its role in soil erosion (between 2000 and 2017) were studied....