نتایج جستجو برای: biological and environment concepts for soil erosion
تعداد نتایج: 19137784 فیلتر نتایج به سال:
Soil erosion involves detachment and transport of soil particles from top soil layers, degrading soil quality and reducing the productivity of affected lands. Soil eroded from the upland catchment causes depletion of fertile agricultural land and the resulting sediment deposited at the river networks creates river morphological change and reservoir sedimentation problems. However, land managers...
Soil erosion is one of the biggest global environmental problems. Finding new innovative systems to measure soil erosion more accurately is a priority. An effort is being carried out in this study to use automated electronics in order to systematically and accurately measure soil erosion. In addition, the frequent measurements taken will help collect a large amount of data on soil erosion. The ...
this paper presents a mapping procedure for risk mapping of water and wind erosion, whichhelps to identify protective measures needed in the planning and management of natural parks. the map of water erosion risk was developed by combining the original and revised universal soil loss equation methodologies (usle-rusle), and the map of wind erosion risk was developed using quirantes’ method. usi...
Wind erosion is important in areas with less than 150 mm of rainfall Measuring the extent and severity of wind erosion in many countries, including Iran, there is no station to measure wind erosion sediments and so the deposition estimation methods rely on empirical models so that in many cases there are measurement errors. With estimates wind and water erosion and deposition potential compared...
One of the problems of some cities in the country, especially those in the vicinity of mountainous watersheds, is the containment and control of runoff, erosion and sedimentation that results in many damages to downstream facilities and infrastructure each year. Watershed operations have been proposed for years to reduce and mitigate destructive effects, and some measures have been taken ...
Archaeological sites in desert areas are at risk for destroying and reburied with sand dunes by sand storms. One of the most important issues for archaeologist and conservators in these regions are maintenance of archaeological remains, during the excavation process and after it, There are several sand dune stabilization methods such as mechanical dune stabilization, mulch or protective screen,...
Analyzing variability of measured runoff and soil loss data under different condition of measurement system, are critical for advancing erosion science, evaluating hydrologic models, and designing erosion experiments. For this purpose, the current study aimed to evaluate how runoff and soil loss are influenced by hillslope direction and length in Sangane arid rangeland, Razavi Khorasan Provi...
Soil erosion has been a problem in agriculture since ancient times. The main impact of erosion on the soil is a loss of soil productivity because of decreased capacities in soil biological, chemical, and physical properties. Various researchers have reported reduced crop yields in eroded soils (Frye et al., 1982; Olson and Carmer, 1990; Chengere and Lal, 1995; Shaffer et al., 1995). This loss i...
To optimize the use of the available land and water resources of a watershed for sustainable agricultural production, soil erosion assessment and conservation are essential. The Universal Soil Loss Equation (USLE) is a widely accepted model (Wishmeier and Smith, 1965. Predicting Rainfall Erosion Losses from Cropland (Agricultural Handbook No. 282). USDA. Washington, D.C.) for assessing soil ero...
The effects of water erosion (including long-term historical erosion and single erosion event) on soil properties and productivity in different farming systems were investigated. A typical sloping cropland with homogeneous soil properties was designed in 2009 and then protected from other external disturbances except natural water erosion. In 2012, this cropland was divided in three equally siz...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید