Jharkhand has water scarcity in most season, so this structure is constructed to save water. By contribution of villagers and their labour to construct this structure is called "sharmdaan" in local language. The construction of this structure generally begins by the end of December and is ensured to be completed before monsoon. It's size varies as per the catchment area. The size of this structure may be 30ft to 100ft in length and 30ft to 100ft in width and its depth is kept 10ft. The water helps in ground water recharge, irrigation and fish farming providing a source of livelihood to poor farmers.