نتایج جستجو برای: sediment source fingerprinting
تعداد نتایج: 460757 فیلتر نتایج به سال:
Recognition of origin of sand dunes is very important in wind erosion control projects. Because of many problems associated with traditional procedures for identifying sediment sources, fingerprinting techniques, based on physical, chemical and organic properties of sediment and source materials, are increasingly being used as a valuable and effective alternative approach to assembling such inf...
sediment fingerprinting is a method for identifying sediment sources and determining the rate of contribution of each source. in this method, the natural tracer technology is used, that combined from samples collection, laboratory analyzing and statistical modeling. the natural tracers are measured in both the sources and suspended sediment to determine the rate of contribution each sources. th...
Suspended sediments in fluvial systems originate from a myriad of diffuse and point sources, with the relative contribution from each source varying over time and space. The process of sediment fingerprinting focuses on developing methods that enable discrete sediment sources to be identified from a composite sample of suspended material. This review identifies existing methodological steps for...
Abstract Purpose Evaluating sediment fingerprinting source apportionments with artificial mixtures is crucial for supporting decision-making and advancing modeling approaches. However, are rarely incorporated into research guidelines model testing currently lacking. Here, we demonstrate how to test using laboratory virtual by comparing the results from Bayesian bootstrapped Materials methods La...
Extended abstract 1. Introduction Soil erosion is a major environmental threat worldwide. This three-stage process including detachment, transportation and sedimentation of soil particle by runoff affects natural and agricultural areas of Iran. Soil erosion has many off-site and on-site effects such as sediment deposition in the lake of dam and channels, transportation of nutrients and contam...
Introduction Many catchment erosion studies focus on formation and land use as the primary source of sediment. It is important to improve information on sediment sources, especially in large catchments and sediment source information which can support catchment management decisions. Erosion control projects need to be understood as the relative contributions of different sediment sources f...
Composite fingerprinting represents an effective method of reconstructing sediment-source changes in remote areas where long-term hydrological and sediment accretion records do not exist. A ca. 50-year record of sediment deposition was determined for a small catchment at Shudu, situated in northwest Yunnan Province, China. Woodland, pasture, shrubland and channel bank material are identified as...
Determining the relative contribution of sediment sources is the first step in planning for soil conservation programs. Due to many problems of traditional methods for determining the contribution of sediment sources, fingerprinting technique have attracted the researchers as an appropriate alternative. The main purpose of this study was to determine the relative contribution and importance of ...
sediment yield data, collected for most regions in iran has been insufficient and not so reliable and there is still not any sufficiently reliable methodology available for sediment yield assessment in the country as a whole. on the other hand, an attainment of reliable sediment yield data is a must and key requirement for the design of effective sediment management as well as control strategie...
sediment-related environmental problems pose a serious threat to sustainable land management in many developing countries, including iran. information regarding sediment sources represents a key requirement from the management perspective since identification of sediment sources is a precursor to the design of effective sediment management and control strategies. the fingerprinting approach has...
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