Elevated nitrate concentrations in ground water can be a problem in agricultural areas, especially where soils are sandy. Tillage operations, such as ridge tillage (RT) and no tillage (NT) can reduce runoff and erosion but leaching of soluble nutrients could adversely impact groundwater. In a 2-year study, Br was used to trace the effects of fertilizer placement on solute movement under corn (Z...

Sediment transport capacity in rills is an important parameter for erosion modeling on hillslopes. It difficult to measure, especially at gentle slopes with limited rill length. In this study, a special flume variable slope gradients upper and lower sections was implemented measure the sediment capacity. The section higher gradient generates faster water flow that could scout more feed rill. re...

The aim of this study was to investigate the relationship between several parameters of saliva and erosive wear in adolescents. (Un-)stimulated saliva was collected from 88 adolescents with erosion and 49 controls (age 16 ± 1 years). Flow rate, pH and buffer capacity were determined immediately. Total protein content, carbonic anhydrase VI, amylase, albumin, calcium, phosphate, urea, sodium, ch...

Abstract Blade leading edge erosion (LEE) is a major cost driver in the wind energy sector. LEE caused by environmental conditions under which blades operate. The impact of airborne particles striking determines speed erosion, thus severity grows towards blade tip and with turbine’s speed. Currently there no established method for assessing aerodynamic LEE, either numerically or experimentally ...

This Aluminium is a valuable metal because of its goodcorrosion resistance, reflectivity,recycling properties,electrical and thermal conductivity. Materials having high strength-to-weight ratios, as well qualities like good corrosion low weight, creep strength, are required in aerospace applications. Cost parameters must also be considered without sacrificing quality. Al, Ti, Mg, Ni, their allo...

The evergreen rain forests of south-east Asia are an ancient and invaluable resource nature's complex answer to relatively poor soils. Their rapid clearance, because of intense international, as well as local, pressures, is depriving the region of substantial long-term income and is seriously disrupting the environment through flooding, soil erosion and climatic change and threatening the welfa...

We used strontium isotopes and analysis of foliar and soil nutrients to test whether erosion can rejuvenate the supply of rock-derived nutrients in the lowland tropical rain forest of La Selva, Costa Rica. We expected that these nutrients would be depleted from soils on stable surfaces, a result of over one million years of weathering in situ. In fact, trees and palms in all landscape positions...

During their operation, wind turbine blades are eroded due to rain and hail, or they are contaminated with insects. Since the relative inflow velocity is higher at the outer than at the inner part of the blades, erosion occurs mostly at the outer blade region. In order to prevent strong erosion, it is possible to install a leading edge protection, which can be applied to the blades after the in...

Modeling of erosion and deposition in complex terrain within a geographic information system (GIS) requires a high resolution digital elevation model (DEM), reliable estimation of topographic parameters, and formulation of erosion models adequate for digital representation of spatially distributed parameters. Regularized spline with tension was integrated within a GIS for computation of DEMs an...