| Atmospheric moisture deposited at the earths surface as rain, hail sleet, snow etc. | | |
| The conversion of water vapour into water droplets due to cooling | | |
| The conversion of water droplets into water vapour due to heating | | |
| The loss of moisture from water surfaces, soil and vegetation | | |
| The horizontal movement of water through soil to reach the river | | |
| The flow of water across the surface into rivers | | |
| Water found under the surface in permeable rocks | | |
| Water held by plants as water falls onto leaves etc. | | |
| The movement of water through rocks | | |
| The process of water entering rocks or soil | | |
| The downward movement of water through rocks or soil | | |
| The upper surface of saturated rocks | | |
| The continuous movement of a constant amount of water between the sea, land and atmosphere | | |
| When the ground is so full, no more water can soak through it | | |