نتایج جستجو برای: sand desert metaphor
تعداد نتایج: 54821 فیلتر نتایج به سال:
Abstract Background We investigated the spatio-temporal dynamics of soil carbon dioxide (CO 2 )- and methane (CH 4 )-flux during biological crust (BSCs) deposition in a sand-binding area eastern Chinese Hobq Desert. The trends organic (C) content density were analyzed this process. sampling sites comprised mobile dune (control) those with algal, lichen, moss crust-fixed sands. desert CO - CH -f...
Economical desert sand engineered cementitious composites (DS-ECCs) using a mixture of cement, fly ash, local sand, water, low-cost PVA fibers, and chemical additives were developed, aiming for further enhancement in ductility toughness. The mechanical behavior DS-ECCs two samples (from Mu Us Tengger deserts, China) was determined uniaxial tension/compression tests three-/four-point bending tes...
Introduction: As NASA's exploration plan for Mars advances with additional missions, the type and abundance of data increase. High-resolution images are revealing numerous wind-related features and suggest widespread distribution of aeolian deposits. These deposits reflect the current and past wind regimes on Mars, but they also obscure some of the bedrock geology. A complementary experiment to...
Remote sensing has been considered as an appropriate tool for temporal monitoring of some natural phenomena. Ardestan Region is prone to land degradation and masked by sand sheets, sand dunes, clay flats, desert pavement and different kinds of salt crust due to dry climate. To study the trends of land degradation in last three decades, four satellite data sets of Landsat MSS, Landsat TM, Landsa...
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