एक ऐसी भूवैज्ञानिक संरचना (geological formation) को क्या कहा जाता है जिसमें न तो पानी होता है और न ही वह पानी को प्रवाहित करती है?

Gully formation due to rainfall erosion on an earthen dam primarily occurs on the:

In water supply engineering, a reservoir is mainly used to:

In water supply engineering, a reservoir is mainly used to: