This study assesses the role of competing ions in the mobilization of arsenic (As) by surface complexation modeling of the temporal variability of As in groundwater. The potential use of two different surface complexation models (SCMs), developed for ferrihydrite and goethite, has been explored to account for the temporal variation of As(III) and As(V) concentration, monitored in shallow ground...

Drought indicators based on model-assimilated Gravity Recovery and Climate Experiment (GRACE) terrestrial water storage observations" (2012). NASA Publications. [1] The Gravity Recovery and Climate Experiment (GRACE) twin satellites observe time variations in Earth's gravity field which yield valuable information about changes in terrestrial water storage (TWS). GRACE is characterized by low sp...

Stochastic groundwater modeling involves the propagation of probabilistic uncertainty from model input parameters to model estimates, usually via a Monte Carlo method. With the increasing reliance upon expert knowledge to define model inputs, and both fuzzy set and possibility theories to characterize this expert knowledge, alternative means of executing model equations are needed. While the fu...

changes in groundwater quality, is caused destruction of other resources, either directly or indirectly, due to bad management of groundwater extractions. considering the importance of groundwater resources, especially in arid and semiarid regions, this research was done to modeling the spatial distribution of some groundwater qualitative factors with emphasis on drinking using geostatistical m...

In Northern and Central Europe, short-rotation coppices (SRC) have become a profitable agricultural production alternative, particularly for marginal fields with suitable groundwater levels. The replacement of fossil fuels by the wood chips produced in SRC contributes to the mitigation of greenhouse gases (GHGs). Due to heterogeneous regional production conditions, the impacts on economy, produ...

Abstract Previous studies in the Gunungsewu Karst Area categorized Pentung Allogenic River catchment that drains to Sawah Ombo Pond as upper part of Bribin Drainage Basin (KDB). However, more detailed results from natural isotope after 2010 have provided reasons postulate groundwater does not flow KDB. Therefore, research aimed trace direction Pentung’s flows Gunungsewu’s karstic hydrogeologica...

Due to numerous droughts in recent years, the amount of surface water arid and semi-arid regions has decreased significantly, so reliance on groundwater meet local regional demands increased. The Kabgian watershed is a karst southwestern Iran that provides significant proportion drinking agriculture supplies area. This study identified areas with potential using combination machine learning sta...