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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Elevated aeolian sediment transport on the Colorado Plateau, USA: The role of grazing, vehicle disturbance, and increasing aridity
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Elevated aeolian sediment transport on the Colorado Plateau, USA: The role of grazing, vehicle disturbance, and increasing aridity

机译：大科罗拉多高原的升高的Aeolian沉积物运输：放牧，车辆扰动和增加的干旱的作用

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Dryland wind transport of sediment can accelerate soil erosion, degrade air quality, mobilize dunes, decrease water supply, and damage infrastructure. We measured aeolian sediment horizontal mass flux (q) at 100 cm height using passive aspirated sediment traps to better understand q variability on the Colorado Plateau. Measured q hot spots' rival the highest ever recorded including 7,460 g m(-2) day(-1) in an off-highway vehicle (OHV) area, but were more commonly 50-2,000 g m(-2) day(-1). Overall mean q on rangeland sites was 5.14 g m(-2) day(-1), considerably lower than areas with concentrated livestock use (9-19 g m(-2) day(-1)), OHV use (414 g m(-2) day(-1)), and downwind of unpaved roads (13.14 g m(-2) day(-1)), but were higher than areas with minimal soil disturbance (1.60 g m(-2) day(-1)). Rangeland q increased with increasing annual temperature, increased winds, and decreasing precipitation. Spatial modeling suggests that 92-93% of regional q occurs in rangelands versus 7-8% along unpaved roads. Four of the five largest road q values (n=33) measured were along roads used primarily for oil or gas wells. Our findings indicate that predicted future mega-droughts will increase q disproportionately in disturbed rangelands, and potentially further compromise air quality, hydrologic cycles, and other ecosystem services. Published 2018. This article is a U.S. Government work and is in the public domain in the USA.
机译：Dryland风传动沉积物可以加速土壤侵蚀，降低空气质量，动员沙丘，减少供水和损坏基础设施。我们使用被动吸气的沉积物陷阱在100cm高度下测量Aeolian沉积物水平质量磁通（Q），以更好地了解Colorado高原上的Q可变性。测量的Q热点的竞争对手在非公路车辆（OHV）区域中的最高记录，包括7,460克（-2）天（-1），但更常见于50-2,000克（-2）天（-1） 。在牧场地​​点的总体平均Q为5.14克（-2）天（-1），比浓缩牲畜使用的地区相当低（9-19克（-2）天（-1）），OHV使用（414克（ - 2）天（-1）），未铺砌道路的下行（13.14克（-2）天（-1）），但较少土壤干扰的区域（1.60克（-2）天（-1）） 。 Rangeland Q随着年度温度增加，随着风的增加和降水降低而增加。空间建模表明，92-93％的区域Q发生在牧场，沿未铺砌的道路7-8％。测量的五个最大道路Q值中的四个（n = 33）沿着主要用于石油或气体井的道路。我们的调查结果表明，预测未来的巨型干旱将在干扰的牧场中不成比例地增加Q，并且可能进一步损害空气质量，水文周期和其他生态系统服务。 2018年出版。本文是美国政府工作，并在美国的公共领域。

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