This study aimed at optimizing horizontal subsurface flow constructed wetlands (CWs) to improve hydraulic performance and pollutant removal efficiency. A groundwater modeling package (MODFLOW) was used to optimize three design parameters (length-to-width ratio, inlet/outlet-to-length ratio, and substrate size configuration). Using the optimized parameters, three pilot-scale CWs were built to tr...

A ground-water flow and transport model simulating contaminant movement to public supply wells in the High Plains aquifer near York, Nebraska was developed as part of the U.S. Geological Survey National Water-Quality Assessment Program. Water-quality samples were collected from wells screened in unconfined and confined units. Samples collected from a public supply well and selected monitoring w...

APEX ( A gricultural P olicy/ E nvironmental e X tender) is an oft-used agroecosystem model but has limited use in groundwater-driven watersheds due to a simplistic representation of groundwater processes. This paper presents the linkage and flow MODFLOW into single modeling code. The mapping recharge, head, groundwater-surface water interactions are handled internally via subroutines. APEX-MOD...

Water is an essential resource for social and economic development. The availability of this constantly threatened by the rapid increase in its demand. This research assesses current (2010–2016), short- (2017–2040), middle- (2041–2070), long-term (2071–2099) levels water security considering socio-economic climate change scenarios using Evaluation Planning System (WEAP) Vilcanota-Urubamba (VUB)...

A coupled regional and local model is required when groundwater flow solute transport are to be simulated in areas of interest with a finer grid while aquifer boundary major stresses should retained coarser grid. The also maintain interactions between the systems. In Beijing Plain (China), assessment managed recharge (MAR), pollution caused by rivers, capture zone well fields, land subsidence a...

Abstract Background The subbasin hydrologic behaviors have been altered by many natural and anthropologic factors such as climate change land development activities. Model-based assessment can be used to simulate both hydrological processes, human-induced effects, management strategies on water resources. For the Ketar subbasin, WEAP (water evaluation planning) model was developed that aimed at...

In systems and control theory dynamical systems described by partial differential equations are known as distributed parameter systems. For modelling and dynamical analysis of distributed parameter systems wide possibilities are offered by virtual software environments as ANSYS, COMSOL Multiphysics, ProCAST, MODFLOW, based on numerical solution of sets of partial differential equations by finit...