Question 2: The sub-surface dyke has demonstrated that it is a feasible method for conserving and exploiting the groundwater resources of the Kerala state of ________.
Question 3: [citation needed] So-called "________" methods, such as solar water disinfection, provide low-cost disinfection options for treatment of stored rainwater for drinking.
Question 5: A subsurface dyke is built in an ________ to obstruct the natural flow of groundwater, thereby raising the groundwater level and increasing the amount of water stored in the aquifer.
Question 9: In ________, many houses away from the larger towns and cities routinely rely on rainwater collected from roofs as the only source of water for all household activities.