[1] We report on laboratory experiments designed to investigate the influence of pore pressure oscillations on the effective permeability of fractured rock. Berea sandstone samples were fractured in situ under triaxial stresses of tens of megapascals, and deionized water was forced through the incipient fracture under conditions of steady and oscillating pore pressure. We find that short‐term p...

12 We report on laboratory experiments designed to investigate the effect of 13 dynamic stressing on permeability of fractured rock. Berea sandstone samples 14 were fractured in-situ under triaxial stresses of 10's of MPa, and deionized 15 water was forced through the incipient fracture under conditions of steady and 16 oscillating pore pressure. We find that dynamic stresses produced by pore 1...

When monitoring deforestation, frequent images with an optimal spatial resolution are required. But in reality either images with low spatial resolution and a high revisit frequency or high spatial resolution images with a low revisit time are available. Combining different spatial and temporal resolutions could solve this problem. The study site in the Colombian Amazon contains small fields wi...

In mathematical models of ow through porous media, the coe cients typically exhibit severe variations in two or more signi cantly di erent length scales. Consequently, the numerical treatment of these problems relies on a homogenization or upscaling procedure to de ne an approximate coarse-scale problem that adequately captures the in uence of the ne-scale structure. Inherent in such a procedur...

Global, spatially and temporally explicit estimates of carbon and water fluxes derived from empirical up-scaling eddy covariance measurements would constitute a new and possibly powerful data stream to study the variability of the global terrestrial carbon and water cycle. This paper introduces and validates a machine learning approach dedicated to the upscaling of observations from the current...

The information on transpiration is vital for sustaining fragile ecosystem in arid/semiarid environment, including the Horqin Sandy Land (HSL) located in northeast China. However, such information is scarce in existing literature. The objectives of this study were to: (1) measure sap flow of selected individual stems of two sand-fixing plants, namely Salix gordejevii and Caragana microphylla, i...

Transport and retention of multi-sized suspended granules are common phenomena in fracture media oil, gas geothermal reservoirs. It can lead to severe permeability damage productivity decline, which has a significant impact on the efficient development underground resources. However, granule transport behaviors remain not well understood quantified. The novel stochastic model is proposed for na...

Many super-resolution algorithms have been proposed for upscaling static images, yet upscaling video footages in real-time with descent quality remains a challenging problem. In this work, we started out developing a super-resolution video player based on upscaling from local self-examples[Freedman and Fattal 2010], for the approach is essentially suitable for applications where maintaining tem...

The upscaled models of reservoirs result in coarse representation of flow for simulation gridblocks. This representation discards subgrid heterogeneities and flow complexities which can lead to an inaccurate performance prediction for reservoir processes. To tackle the problem, reconstruction techniques such as multiscale or upscaling–downscaling methods have been developed to recapture the sub...