Conjunctive use of surface water and groundwater via the bank infiltration method

Abstract

The bank infiltration (BI) technique may be a viable option if the local climate, hydrological, and geological conditions are conducive. This study was specifically conducted to explore the possibility of using BI to source the polluted surface water in conjunction with groundwater. Three major factors were considered for evaluation: (1) investigation on the contribution of surface water through BI, (2) input of local groundwater, and (3) water quality characteristics of water supply. Initially, the geophysical method was employed to define the subsurface geology and hydrogeology, and isotope techniques were performed to identify the source of groundwater recharge and interaction between surface water and groundwater. The physicochemical and microbiological parameters of the local surface water bodies and groundwater were analyzed before and during water abstraction. Extracted water revealed a 5 %-98 % decrease in turbidity, as well as HCO3 +, SO4 −, NO3 −, Al, As, and Ca concentration reduction compared with those of Langat river water. However, water samples from test wells during pumping show high concentrations of Fe2+ and Mn2+. In addition, amounts of Escherichia coli, total coliform, and Giardia were significantly reduced (99.9 %). Pumping test results indicate that the two wells (DW1 and DW2) were able to sustain yields.

Modelling contaminant transport for pumping wells in riverbank filtration systems

“…A riverbank filtration technique has been applied for the first time in Malaysia in a pilot project conducted in Jenderam Hilir, located in Langat Basin, Selangor, Malaysia (Shamsuddin et al, 2013). The experimental site in Jenderam Hilir is located in the southwest state of Selangor near the Semenyih river water intake and treatment plant and covers approximately 10 km 2 (Shamsuddin et al, 2013).…”

“…The experimental site in Jenderam Hilir is located in the southwest state of Selangor near the Semenyih river water intake and treatment plant and covers approximately 10 km 2 (Shamsuddin et al, 2013). The site is roughly 4 km downstream of (Shamsuddin et al, 2014).…”

“…In the same context, by using daily pumping that equals 3072 m 3 /d, the value reaches approximately 13 mg/L in DW2. Therefore, by using 4072 m 3 /d or 3072 m 3 /d, the water produced will have high pollution of NO À 3 where the drinking water standard of NO À 3 is 10 mg/L (Shamsuddin et al, 2013).…”

“…Doussan et al (1997). Shamsuddin et al (2013) have shown in their project that DW2 has less contamination than DW1. Their results contradicted the results obtained from the present analytical model.…”

“…Then, the model is tested with data collected by Doussan et al (1997) related to a riverbank filtration site in France. After this model verification, it is applied for the first riverbank filtration project in Malaysia (Shamsuddin et al, 2013).…”