In this paper, two formulas were chosen among those that estimate the suspended sediment discharge in rivers. These two formulas were Lane and Kalinske and Bagnold. For studying and knowing the correlation between input parameters and calculated suspended sediment discharge (CSSD), the SPSS17 software was used. Input parameters in these two formulas were as: water […]
Floristic studies are fundamental for the applied sciences such as rangeland management and conservation. Unique ecological and climatic conditions in the Northern Khorasan Province (NKP) make it a remarkable habitat for the floristic studies. Plant species were collected from 50 field sites, representing major habitats of winter and rural rangelands. Surveys were conducted during active […]
Vegetation cover over time and space is the result of interactions between vegetation cover and environmental factors. Changes occurred in range covers are caused by matrix dominance, one of the most important environmental factors. Decision support system (DSS) could be used for determining the rate and importance of each factor. Actually, in methods based on […]
Mountainous rangeland ecosystems have a highly delicate position in ecologic area because of severe environmental conditions and having wildlife and livestock. Knowing and realizing the biotic and abiotic components, which have an interaction with each other in this ecosystem, perform the most important role in to desirable management of it. The systematic management is one […]
MPSIAC is currently known as an appropriate method to measure sediment of Watershed basins of the country while there has not been any sensitivity analysis so far for this method. In this study, required data for MPSIAC model were gathered from six basins; Amame-Kamarkhani, Kand-Golandok, Tang Kenesht (from two different references), Nojian (from three different […]
To reach the desirable ecosystem management, determining the animal diet selection, which is one of the components of rangeland ecosystem, is important. Therefore, in order to determine the grazing behavior and diet selection of sheep and goat, the upland rangeland of northern part of Alborz was selected. In this study, the first weeks of July […]
At the beginning of twenty-first century, the water crisis in the priority policy and management is inside and outside of the country as principle thoroughly human, social, economic and political rulers of the country is considered abundant. The World Bank has announced that during 1960 and 2025, water resources in Middle East, from 3430 m3 […]
Desertification is one of the major issues threatening human communities. Many methods have been developed for assessment and mapping of desertification hazards. In this research, multi-criteria evaluation method was used to investigate desertification process in Trouti watershed, Golestan Province, Iran. At the first step, major desertification factors were determined by doing field surveys. They were […]
Converting the native rangelands to simplified agronomic communities causes some changes in soil carbon, nitrogen and phosphorus. Establishing of perennial plant communities on formerly cultivated rangelands is expected to stabilize soil properties and increase the amount of C, N, P stored in rangeland soils, but there is little information on what plant communities are the […]
In this investigation, the effects of enclosure, restal delayed grazing and continued grazing treatments on the production rate and vegetation cover were studied. Study area was SadrAbad pasture. After selecting three bands (1+1+1=3 hectare area) as three treatments in the restricted and non restricted area, they were transected to three transects. Then plots (1×2m2 ) […]
