SGER:Portable In-situ Wind ERosion Lab (PI-SWERL): Testing and validation

便携式原位风蚀实验室（PI-SWERL）是一个相对较新的仪器，用于研究自然和人工土壤表面的风沙排放。 与PI-SWERL的初步实验表明，传统的模型，即灰尘排放量单调增加施加到表面的剪切应力是过于简单化，忽略了沉积物供应，结壳和分层的问题。 在实地研究过程中收集的数据表明，许多土壤表面的行为偏离其理想化的代表性粉尘排放模型。本项目将对一系列人工土壤试验区进行一系列初步测量和相关数据分析。第一个目标是将PI-SWERL收集的数据与土壤表面的具体物理方面联系起来。第二个目标是表征在这些受控条件下的新型跃移传感器的响应。在世界许多地区，特别是在半干旱或季节性干旱气候地区，风蚀和风蚀是一个主要问题。风对土壤的影响对农业土地的适当管理具有非常重要的意义。从PI-SWERL数据中提取土壤表面物理方面的信息的这种方法将使一种新的技术，用于机械地理解风尘排放，由此产生的信息可以显着提高干旱地区土壤风蚀模型表示的保真度。

The Portable In-situ Wind ERosion Lab (PI-SWERL) is a relatively recent instrument that is used to study windblown dust emissions from natural and artificial soil surfaces. Initial experiments with the PI-SWERL indicate that the traditional models whereby dust emissions increase monotonically with shear stress applied to the surface are overly simplistic and ignore issues of sediment supply, crusts, and layering. Data collected during field studies indicate that the behaviors of many soil surfaces stray from their idealized representations in dust emissions models. This project will undertake a set of preliminary measurements and related data analysis on a series of constructed soil test plots. The first goal is to relate data collected with the PI-SWERL to specific physical aspects of the soil surface. A second goal is to characterize the response of a new type of saltation sensor under these controlled conditions. Wind erosion and transport is a major problem in many parts of the world, especially those with semi-arid or seasonally arid climate. The effects of wind on soil has very significant implications for the proper management of agricultural land. This approach for extracting information on the physical aspects of a soil surface from PI-SWERL data would enable a new technique for mechanistically understanding eolian dust emissions, and the resultant information could significantly improve the fidelity of model representation of wind erosion of soils in arid regions.