* Corresponding author. USDA – ARS, SEWRL E-mail addresses: [email protected] (J. Cho), sm 1537-5110/$ – see front matter Published by doi:10.1016/j.biosystemseng.2009.01.007 Accurate simulation of cell-based processes is important for evaluating the impacts of best management practices (BMPs) on surface and ground water. The objective of this study was to evaluate the cell-based component of the Dyn...

[1] Whereas the existence of pronounced orbitally controlled periodicities is a major feature of Earth climate, its impact on landscape dynamics remains poorly understood. We use a Landscape Evolution Model (LEM) to systematically investigate the response of landscapes to a range of periodic oscillations in precipitation. The resulting sediment-flux evolution displays a pronounced sensitivity t...

Shrub encroachment in arid and semiarid rangelands, a worldwide phenomenon, results in a heterogeneous landscape characterized by a mosaic of nutrient-depleted barren soil bordered by nutrient-enriched shrubby areas known as ‘‘fertile islands.’’ Even though shrub encroachment is considered as a major contributor to rangeland degradation, little is known about mechanisms favoring the reversibili...

As a geological process that wears away soil, rock, or dissolved material, erosion may result in the loss of soil layers are rich nutrients for plant growth and reducing ability to absorb store water. High rainfall causes high level erosivity which can lead increase intensity. Therefore, predicting erosion, rain condition needs be considered most, especially tropics. This study was conducted Sa...

Surface topography results from complex couplings and feedbacks between tectonics surface processes. We combine analog numerical modeling, sharing similar geometry boundary conditions, to assess the topographic evolution of an alluvial fan crossed by active thrust fault. This joint approach allows calibration critical parameters constraining river deposition–incision laws, such as settling velo...

“Erodibility” is a characteristic of the soil that represents susceptibility with which its particles from most superficial layer are taken and transported to lower places by erosive agents, causing environmental economic damages. This work estimated erodibility in pastures forest areas municipality Porto Velho-Rondônia. In field, three different types vegetation were selected, one brachiaria, ...

Total phosphorous (TP) and total suspended sediment (TSS) pollution is a problem in the US Midwest and is of particular concern in the Great Lakes region where many water bodies are already eutrophic. Increases in monoculture corn planting to feed ethanol based biofuel production could exacerbate these already stressed water bodies. In this study we expand on the previous studies relating lands...