نتایج جستجو برای: soil topography
تعداد نتایج: 207222 فیلتر نتایج به سال:
This study seeks to advance the knowledge about effect of a priori parameters on calibration using Sacramento Soil Moisture accounting Model (SAC-SMA). We investigated catchment characteristics where is most affected by limitations in and we studied modeled processes. The SAC-SMA model were determined from soil-derived physical expressions that make use soil’s properties. employed 63 catchments...
Topography and land use are among the most important factors affecting the soil formation. Chemical forms of Fe and magnetic susceptibility (χ) are widely used for the evaluation of soil development. This study was conducted in order to determine the effect of these factors on χ. A toposequence was selected in Madvan Plain, Northern Yasouj. Nine soil profiles (paddy and dryland soils) w...
Concentrations of 239 Pu and 240 in 163 surface soil samples five cores collected from the northeast north China were analyzed using radiochemical separation combined with inductively coupled plasma mass spectrometry measurement. The average Pu/ atomic ratios (0.185 ± 0.018) for all indicated that global fallout is major source plutonium studied region. 239,240 concentrations ranged 0.002 mBq/g...
introduction: gully erosion is an important type of soil erosion in iran and ardebil province (moghimi and salami, 2011; khatibi, 2006). increasing the cross section of gullies is an indicator for gully developing (deng et al, 2015). topography and soil properties are two important factors in gully developing in various regions of worldwide (poesena et al, 2003). despite the importance of soil ...
There are 34 endemic species of Nepeta in Iran, which one of them is Nepeta asterotricha. The present study evaluate different parameters including topography, climate factors, phenology, quantified properties of vegetation variation, physical and chemical properties of the soil at eight natural habitat of the plant in Yazd province. According to the study habitats, the results showed that the ...
The objective of this study was to examine the reflectance of Landsat TM imagery for mapping soil organic Carbon (SOC) content in an Alpine environment. The studied area (ca. 3*104 km2) is the upper reaches of the Heihe River at the northeast edge of the Tibetan plateau, China. A set (105) of topsoil samples were analyzed for SOC. Boosted regression tree (BRT) models using Landsat TM imagery we...
The spatiotemporal pattern of soil moisture is of great significance for the understanding of the water exchange between the land surface and the atmosphere. The two-satellite constellation of the Sentinel-1 mission provides C-band synthetic aperture radar (SAR) observations with high spatial and temporal resolutions, which are suitable for soil moisture monitoring. In this paper, we aim to ass...
Abstract. Prediction of mean annual runoff is great interest but still poses a challenge in ungauged basins. The present work diagnoses the prediction affected by uncertainty estimated distribution soil water storage capacity. Based on function, balance model for estimating developed, which effects climate variability and capacity are explicitly represented. As such, two parameters have explici...
Satellite soil moisture products, such as those from Advanced Microwave Scanning Radiometer (AMSR), require diverse landscapes for validation. Semi-arid landscapes present a particular challenge to satellite remote sensing validation using traditional techniques because of the high spatial variability and potentially rapid rates of temporal change in moisture conditions. In this study, temporal...
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