Tracking Soil Moisture Dynamics with Vis-NIR Spectroscopy During Laboratory Bare-Soil Evaporation - Research Data

We conducted evaporation experiments on 5 cm tall packed soil columns of two soil types (sand and silt loam). The surface water content of each soil column was assessed by repeatedly recording spectra in the visible, near infrared, and shortwave infrared domain using an ASD Fieldspec® Pro spectrometer (350–2500 nm). To infer soil water content from the spectra, samples with defined water contents were independently analyzed with the ASD and a polynomial was fitted to the data. This dataset comprises all spectral data of the study and the water contents derived from numerical simulations with the Richards equation using the HYDRUS-1D code. All details are given in the corresponding open access publication, which can be accessed via the link provided.

本研究针对砂土（sand）与粉砂壤土（silt loam）两种土壤类型的5 cm高装填土柱开展蒸发实验。本研究使用ASD Fieldspec® Pro光谱仪（ASD Fieldspec® Pro spectrometer，350–2500 nm），通过反复采集可见光（visible）、近红外（near infrared）及短波红外（shortwave infrared）波段的光谱数据，对各装填土柱的表层土壤含水量进行测定。为从光谱数据反演土壤含水量，本研究先对预设含水量的土样使用ASD光谱仪独立开展测试，并基于所得数据拟合得到多项式模型。本数据集包含本研究的全部光谱数据，以及借助HYDRUS-1D代码（HYDRUS-1D code）求解理查兹方程（Richards equation）开展数值模拟得到的土壤含水量数据。本研究的全部细节已在对应的开放获取期刊论文中详述，可通过提供的链接获取该文献。