نتایج جستجو برای: alluvial soil

تعداد نتایج: 183502  

جلالیان, احمد , خادمی, حسین , کریمی, علیرضا ,

Despite the existence of highly silty soils in southern Mashhad, there is no information about the aeolian and /or in situ formation of these soils. The main objective of this study was to determine the source of silt generation in this area. Granitic hilly lands in southern Mashhad have been covered by silty deposits. Based on the soil origin, four profiles including a residual soil covered by...

2006
Yongqiang Zhang Martin Wegehenkel

Water shortage is a serious constraint on crop production on the North China Plain (NCP), where cropland is mainly irrigated by pumping groundwater from alluvial aquifers. To develop a sustainable ground water and irrigation management strategy, we developed a three-layer soil water balance model which is easy to use, robust, but physically based simulation tool. The model successfully simulate...

A. Alinejad Taheri M. Davoodi, R. Jamshidi Chenari,

Seismic waves are filtered as they pass through soil layers, from bedrock to surface. Frequencies and amplitudes of the response wave are affected due to this filtration effect and this will result in different ground motion characteristics. Therefore, it is important to consider the impact of the soil properties on the evaluation of earthquake ground motions for the design of structures. Soil ...

ژورنال: علوم آب و خاک 2008
جلالیان, احمد , خادمی, حسین , کریمی, علیرضا ,

Despite the existence of highly silty soils in southern Mashhad, there is no information about the aeolian and /or in situ formation of these soils. The main objective of this study was to determine the source of silt generation in this area. Granitic hilly lands in southern Mashhad have been covered by silty deposits. Based on the soil origin, four profiles including a residual soil covered by...

Journal: :computational methods in civil engineering 2012
r. jamshidi chenari a. alinejad taheri m. davoodi

seismic waves are filtered as they pass through soil layers, from bedrock to surface. frequencies and amplitudes of the response wave are affected due to this filtration effect and this will result in different ground motion characteristics. therefore, it is important to consider the impact of the soil properties on the evaluation of earthquake ground motions for the design of structures. soil ...

2013
M. Al-Qinna M. Salahat K. Mashal

Gravely calcareous soils cover approximately most of arid lands (in percent); however, the solute transport behavior in these soils remains a current issue. This research aimed at estimating and correlating the solute transport parameters in gravely calcareous soils as being affected by different land uses through the knowledge of the soil morphological, physical, and chemical properties. Four ...

2009
M. Horvat D. Kocman

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Atmospheric Chemistry and Physics Discussions This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract Re...

2006
Rolfe D. Mandel Paul H. Nelson

A geomorphological investigation was conducted in Fox Creek valley within the Tallgrass Prairie National Preserve, Chase County, Kansas. During the first stage of the study, Quaternary landforms were defined and mapped in the valley. This was followed by inspection of cutbank exposures along the creek and deep coring across the valley floor. Subsurface information gleaned from the exposures and...

ژورنال: علوم آب و خاک 2004
احمد جلالیان, , حسین خادمی, , حمیدرضا کریم‌زاده, ,

Clay minerals deserve special attention as they play a crucial role in many soils. The clay mineralogy of five gypsiferous soils from different landforms in eastern Isfahan was investigated using X-ray diffraction (XRD). In addition, soil aggregates and wind-deposited sediments were examined by scanning electron microscope (SEM) and analyzed by energy dispersive X-ray analyzer (EDX). The resul...

2007
M. C. Quigley

Geologic and chronometric studies of alluvial fan sequences in south-central Australia provide insights into the roles of tectonics and climate in continental landscape evolution.The most voluminous alluvial fans in the Flinders Ranges region have developed adjacent to catchments uplifted by Plio-Quaternary reverse faults, implying that young tectonic activity has exerted a ¢rstorder control on...

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