نتایج جستجو برای: alluvial soils
تعداد نتایج: 51765 فیلتر نتایج به سال:
The Central Fergana region is one of the overpopulated regions Asia, which includes parts Uzbekistan, Kyrgyzstan, and Tajikistan. Here, in dry subtropical climate are most ancient, irrigated oases used for agriculture. valley key to food security as a whole. article provides information on diversity chemical composition newly developed, new old-irrigated Calcisols soils formed alluvial alluvial...
There is a need to automate terrain feature mapping so that to make the process more objective and less time consuming by using proper feature extraction techniques. The objective of this study was the use of object-oriented image analysis methods for the automatic extraction of alluvial fan terrain units. The study area was located in the Death Valley, Nevada, USA. The data used included an AS...
Alluvial aquifers in mountainous regions cover typically a limited area. Their contribution to catchment storage and outflow is rarely isolated; alluvial groundwater discharge under gauging stations is generally assumed negligible; and hydrological models tend to lump alluvial storage with other units. The role of alluvial aquifers remains therefore unclear: can they contribute significantly to...
In the Mediterranean area, several alluvial coastal plains, developed after Holocene transgression, are affected by subsidence. The Volturno alluvial-coastal plain, along eastern Tyrrhenian Sea (southern Italy) is characterized subsidence rates determined through InSAR data analysis and ranging between 0 <?20 mm/year in an area of about 750 kmq across River. Inside this pattern shows sites w...
Terrestrial sedimentation buries large amounts of organic carbon (OC) annually, contributing to the terrestrial carbon sink. The temporal significance of this sink will strongly depend on the attributes of the depositional environment, but also on the characteristics of the OC reaching these sites and its stability upon deposition. The goal of this study was to characterise the OC during transp...
Alluvial slopes are piedmonts characterized by parallel steam channels rather than alluvial fans. They are common landforms in extensional basins of the south-western United States but have received little attention from geomorphologists or sedimentologists. Persistence of channellized flow across piedmonts, as opposed to sheetflooding due to loss of flow confinement on alluvialfan surfaces, di...
A study was performed to determine groundwater fluoride concentration of Posht-e-Kooh-eDashtestan area located in southern Iran. Groundwater samples were collected from 26 wells, 4 springs, during dry and wet seasons. Fluoride concentration was determined in the water samples using SPADNS method. The results showed that fluoride concentrations are above the World Health Organization (WHO) maxim...
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