What is subsurface storm flow?
Subsurface stormflow is a runoff producing mechanism. operating in most upland terrains. Subsurface stormflow. occurs when water moves laterally down a hillslope through. soil layers or permeable bedrock to contribute to the storm.
What is subsurface flow in the water cycle?
Subsurface flow refers to the flow of water below earth’s surface as part of the hydrologic cycle. Subsurface flow may return to earth’s surface as perched flow, such as from a spring or seep, or subsurface (baseflow) return to streams, creeks, and rivers.
Why is subsurface flow important?
Subsurface flow has been attracting attention as an important topic of research in recent years because of its crucial role in water cycle calculation, flood prediction, slope stability, nutrient recycling, and soil–water–vegetation exchange processes.
What is subsurface runoff?
Subsurface runoff is the water that infiltrates in the vadose zone (unsaturated zone), from rain, snowmelt, or other sources, and moves laterally towards the streams. Vadose zone extends from the top of the ground surface to the water table. It is one of the major components in the water cycle.
What causes subsurface flow?
In the water cycle, when precipitation falls on the earth’s land, some of the water flows on the surface forming streams and rivers. The remaining water, through infiltration, penetrates the soil traveling underground, hydrating the vadose zone soil, recharging aquifers, with the excess flowing in subsurface runoff.
What is the difference between subsurface flow and groundwater flow?
This flow is called subsurface flow (in the past it was called hypodermic flow). The presence of a relatively impermeable shallow layer favours this flow. Subsurface flows in water bearing formations have a drainage capacity slower than superficial flows, but faster than groundwater flows.
What is subsurface water in hydrology?
groundwater, water that occurs below the surface of Earth, where it occupies all or part of the void spaces in soils or geologic strata. It is also called subsurface water to distinguish it from surface water, which is found in large bodies like the oceans or lakes or which flows overland in streams.
How does groundwater flow in the subsurface?
Groundwater flows underground Some of the precipitation that falls onto the land infiltrates into the ground to become groundwater. If the water meets the water table (below which the soil is saturated), it can move both vertically and horizontally.
Where base flow separation is performed?
Straight Line Method: In this method the separation of the base flow is achieved by joining with a straight line the beginning of the surface runoff to a point on the recession limb representing the end of the direct runoff.