Management of soils to reduce the amount of PM10 emitted during agricultural tillage operations is important for attainment of air quality standards in California's San Joaquin Valley (SJV). The purpose of this study was to improve and expand upon earlier work of predicting tillage-generated dust emissions based on soil properties. We focus on gravimetric soil water content (GWC) and soil textu...

Thus the systems studied by CCGS do seem to be examSandslide or avalanche models were introduced in the work of Bak, Tang, and Wiesenfeld [1]. They looked at the process of adding grains of sand arbitrarily slowly to a model sandpile, and studied the spectrum of avalanches produced by the individual addition events. They suggested that the pile would adjust its slope to a critical value in whic...

Generally, typical crescentic dunes in the ideal state are symmetrical, but it is difficult to form with two perfectly symmetrical horns under actual conditions. Among many environmental factors, bidirectional winds, size of sand particles, topography, epiphyte vegetation, and dune collision important reasons for asymmetric evolution dunes. Few existing studies have revealed mechanism morpholog...

To improve the stability of sloping farmland, optimum ratio for parameter composite soils was determined. Plain and mixed were prepared with three improved materials glutinous rice glue, wood fibres coarse sand laboratory to tests experiments. For different moisture soil contents, shear strength, cohesion internal friction angle analysed proportions adjusted based on suitability plant growth. S...

Abstract Pile foundations are adopted if a soil of low bearing capacity extends to considerable depth or the structure is heavy settlement due large. It transfers load strong, stable stratum soil. The behaviour in slope and piles embedded it an elaborated soil-structure interaction problem. This paper presents results experimental investigations on single pile subjected lateral by varying relat...

The InSight lander rests on a regolith-covered, Hesperian to Early Amazonian lava plain in Elysium Planitia within ∼27-m-diameter, degraded impact crater called Homestead hollow. km cm-scale stratigraphy beneath the is relevant mission's geophysical investigations. Geologic mapping and statistics indicate that ∼170 m of mostly basaltic lavas are underlain by Noachian (∼3.6 Ga) materials possibl...

i Numerical modelling of the growth of offshore sand waves Preface This thesis is my final work carried out for the double degree Master of Science programme in Hydraulic Engineering and Water Resources Management at the Delft University of Technology and the National University of Singapore. The study was carried out at Deltares and covers various modelling aspects of the growth of offshore sa...

abstract gully erosion is a kind of water erosion that has high priority in fars province due to sediment production and enormous damages to land, roads and infrastructures. in this study, 15 gullies were selected and their morphometric characteristics, such as catchment area, soil, cover vegetation and climate were measured. in order to determine influential factors on the sediment production ...