In this study both data of land use and cover were compared for selected period time it is obvious that urban area significantly increased in Saline River watershed, Arkansas, USA. For hydrologic studies analysis WMS 8.1 program was used to delineate the watershed other processes. further analysis, HEC-HMS analyze results hydrographs peak flows. Results show there impact processes due urbanizat...

Phosphorus (P) losses from agricultural landscapes arise from the interaction of hydrologic, edaphic, and management factors, complicated by their spatial and temporal variability. We monitored sites along two agricultural hillslopes to assess the effects of field management and hydrology on P transfers in surface runoff at different landscape positions. Surface runoff varied by landscape posit...

BACKGROUND: The Barataria Basin, a bar-built estuarine system located directly west of the Mississippi Delta, has been experiencing a significant land loss, especially since the leveeing of the Mississippi River for flood control purposes in early 20

The mechanisms that drive species coexistence and community dynamics have long puzzled ecologists. Here, we explain species coexistence, size structure and diversity patterns in a phytoplankton community using a combination of four fundamental factors: organism traits, size-based constraints, hydrology and species competition. Using a 'microscopic' Lotka-Volterra competition (MLVC) model (i.e. ...

Soil hydrology is highly nonlinear. As surface soil becomes To characterize the subgrid variability in surface hydrology at saturated with water, excess water runs off in streams. If the the SGP site, we drive a land surface model (the parameters that influence surface soil water vary widely within Biosphere-Atmosphere Transfer Scheme [BATS]; Dickinson a general circulation model (GCM) grid cel...

Guo-Yue Niu,* Claudio Paniconi, Peter A. Troch, Russell L. Scott, Matej Durcik, Xubin Zeng, Travis Huxman and David C. Goodrich 1 Biosphere 2 Earth Science, University of Arizona, USA 2 Centre Eau, Terre et Environnement, Institut National de la Recherche Scientifique, Université du Québec, Quebec City, Canada 3 Department of Hydrology and Water Resources, University of Arizona, USA 4 Southwest...