نتایج جستجو برای: نمونه‌گیر BSNE
تعداد نتایج: 19 فیلتر نتایج به سال:
The characterisation of mineral dust at emission sources is essential for quantifying the wider-scale environmental impacts has, as well improving its incorporation in modelling. Methods sampling sediments these source areas purposes are varied and can produce different representations emitted dust. This study systematically compared characterisations from three established approaches estimatin...
The objective of this study was to assess the efficiency of three mathematical models (power, exponential and logarithmic functions) for the calculation of the horizontal mass transport (HMT), as compared to the linear spline interpolation for the Cyclone Dust Sampler (CDS) and one with a Cone (CDSC), modified Wilson and Cooke trap (MWAC) and big spring number eight (BSNE). For the purposes of t...
For the study of field wind erosion and the design and evaluation of wind erosion control techniques, detailed observations of soil particle transport and vertical destribution of eroded soil particles are needed. The objectives of this study were: 1) To describe one device for soil transport particle measurement, i. e. the BSNE sediment catcher and 2) To assess vertical distribution of wind–er...
For the study of field wind erosion and the design and evaluation of wind erosion control techniques, detailed observations of soil particle transport and vertical destribution of eroded soil particles are needed. The objectives of this study were: 1) To describe one device for soil transport particle measurement, i. e. the BSNE sediment catcher and 2) To assess vertical distribution of wind–er...
wind erosion is a significant problem on 20 million ha of iran, especially in central plains and coastal areas. winderosion samplers, meteorological equipments and measurement procedure have been developed over the last twocenturies to measure the particles moving across the field in modes of creep, saltation and suspension. in recentresearch as the first technical measurement in iran, wind ero...
اندازه گیری کمی ریزگرد ها کمک شایانی در منشاء یابی و کنترل فرسایش بادی می نماید. هدف از انجام این پژوهش ارزیابی کارایی تله اصلاح شده ویلسون و کوک (mwac)، تله رسوب گیر دورانی با مخروط (cdsc)، تله رسوب گیر دورانی بدون مخروط (cds) و تله رسوب گیر تیله ای (mdco) در مقایسه با نمونه گیر bsne در سرعت های گوناگون با اندازه ذرات متفاوت بود. بدین منظور نمونه گیر های mwac،bsne وmdco شبیه سازی و دو تله رسوب...
Quantitative measurement of aeolian dust may help properly monitor and control the wind erosion. The aim of this study was to evaluate the efficiencies of four aeolian dust samplers including the modified Wilson and Cooke sampler (MWAC), cyclone dust sampler with cone (CDSC), cyclone dust sampler (CDS), and marble dust collector (MDCO) in comparison with the big spring number eight sampler (BSN...
به منظور بررسی فرسایش بادی در صحرا و طرح و ارزیابی فناوری های کنترل فرسایش بادی، مشاهدات جزئی از حمل ذره خاک و توزیع عمودی ذرات خاک فرسایش یافته مورد نیاز است. اهداف این پژوهش عبارت بود از: 1. توصیف یک ابزار برای اندازه گیری حمل ذرات خاک،bsne به عنوان یک گیرنده رسوب 2. تعیین توزیع عمودی رسوب فرسایش یافته بادی با ارتفاع در منطقه شرق اصفهان. گیرنده رسوب bsne یک نمونه بردار فرسایش بادی است، که موا...
Field data need to be collected to test wind erosion models under a broad range of climate, soil, and management conditions. The objective of this study was to test the USDAARS Wind Erosion Prediction System (WEPS) for a field with winter wheat plants in a modest amount of flat residue. A 600 m by 415 m field was selected near Burlington, CO, USA. Big Spring Number Eight (BSNE) samplers were us...
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