Providing the safest potable water supplies is a challenging task in the coastal areas of India due to the high groundwater salinity and unreliable surface water supplies. One of the east flowing river basins in Andhra Pradesh State, India, namely Varaha river saline coastal tract has been identified for implementing the River Bank Filtration (RBF) technique for providing potable water to the rural population. This technique is focused on identifying low saline aquifer zone, which is connected to the river bed for establishing RBF well on Varaha river bank. Using Geophysical methods (Electrical Resistivity Tomography, Vertical Electrical Soundings) and hydrochemistry surveys, the river-aquifer interaction zones (low saline) are successfully identified and drilled the RBF well on the Varaha river bank up to the depth of 35 m below ground level. The RBF well yield and aquifer productivity are assessed during pumping test analysis. The comparison of hydrochemistry between river water, groundwater and RBF water further confirm that the RBF water is safe for drinking with minimum treatment like chlorination or ozonation. Hence the RBF technique is an alternative source of drinking water supply scheme in the saline coastal tracts of east flowing rivers of India.

在印度沿海地区，由于地下水盐度高和地表水供应不可靠，提供最安全的饮用水供应是一项艰巨的任务。印度安得拉邦的一个向东流动的流域之一，即瓦拉哈河盐碱沿海地带，已被确定用于实施向农村人口提供饮用水的河岸过滤（RBF）技术。该技术的重点是确定低盐度含水层区，该区与河床相连以在瓦拉哈河岸上建立RBF井。使用地球物理方法（电阻率层析成像，垂直电测深法）和水化学勘测，成功地确定了河流-含水层的相互作用区域（低盐度），并在瓦拉哈河岸上的RBF井钻了到地下35 m的深度。在抽水试验分析过程中评估了RBF井的产量和含水层生产率。将河水，地下水和RBF水之间的水化学性质进行比较，进一步证实RBF水可以安全饮用，并且只需进行最少的氯化或臭氧处理即可。因此，RBF技术是印度东流河沿岸盐碱地带的饮用水供应方案的替代来源。