Interaction of Aquifer and River‐Canal Network near Well Field

Abstract

The article presents semi-analytical mathematical models to asses (1) enhancements of seepage from a canal and (2) induced flow from a partially penetrating river in an unconfined aquifer consequent to groundwater withdrawal in a well field in the vicinity of the river and canal. The nonlinear exponential relation between seepage from a canal reach and hydraulic head in the aquifer beneath the canal reach is used for quantifying seepage from the canal reach. Hantush's (1967) basic solution for water table rise due to recharge from a rectangular spreading basin in absence of pumping well is used for generating unit pulse response function coefficients for water table rise in the aquifer. Duhamel's convolution theory and method of superposition are applied to obtain water table position due to pumping and recharge from different canal reaches. Hunt's (1999) basic solution for river depletion due to constant pumping from a well in the vicinity of a partially penetrating river is used to generate unit pulse response function coefficients. Applying convolution technique and superposition, treating the recharge from canal reaches as recharge through conceptual injection wells, river depletion consequent to variable pumping and recharge is quantified. The integrated model is applied to a case study in Haridwar (India). The well field consists of 22 pumping wells located in the vicinity of a perennial river and a canal network. The river bank filtrate portion consequent to pumping is quantified.

Water Quality Monitoring in Northern India for an Evaluation of the Efficiency of Bank Filtration Sites

“…Consequently, and in light of the imminent risk from OMPs, the selection of source water has to be done very carefully, especially if surface water is directly abstracted for drinking water production. In case of polluted river water, RBF provides a pre-treatment for the removal of, among others, OMPs [10,22]. The removal rate depends on compound-specific properties (biodegradability and adsorption behavior) as well as on water quality, geochemical composition of aquifer material and hydraulic boundary conditions [23].The aim of the presented study is to expand the knowledge of organic and inorganic water quality at RBF sites over four years in the upper part of the Ganges and Yamuna Rivers.…”

A Tale of Two Roads: Groundwater Depletion in the North China Plain

“…Note that the water table gets deeper farther from the river, which is to be expected. The effect of seepage may be non-linear with respect to distance (Ghosh et al, 2014), so we include a quadratic polynomial in our specification. Controlling for village fixed effects allows us to eliminate differences between villages in the form of topography, geographic location, and other village-level, time-invariant characteristics.…”

Modelling The Effect of Hydraulic Conductivity on One Dimensional Contaminant Transport in RBF System

“…Also, some authors developed numerical solutions to investigate the effect of pumping process on contaminant transport especially by using MODFLOW software [18][19][20][21][22]. Some mathematical modelling studies were focused on groundwater flow, the drawdown of water due to pumping process and stream depletion rate [23][24][25][26]. Some models produced solutions to determine the drawdown of water in pumping wells located near river and to determine the change of hydraulic conductivity [27,28] .…”