Subsurface Flow

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subsurface flow

[¦səb′sər·fəs ′flō]
Interflow plus groundwater flow.

Subsurface Flow


the movement of subterranean water under the influence of piezometric head and the force of gravity. An integral part of the water cycle, subsurface flow characterizes the natural resources of subterranean water, which is under the draining influence of rivers, lakes, seas, or waterless negative landforms. Subsurface flow is expressed as a modulus (liters per sec per sq km) or as a layer of water (mm per year), as well as in cu m per day and cu km per year. In hydrogeological studies, the moduli and coefficients of subsurface flow are determined, indicating (often in percent) what part of the precipitation goes to feed the subterranean water.

In the USSR, the modulus of subsurface flow varies from 0.1–0.5l per sec per sq km on the plains of Middle Asia to 10 l per sec per sq km in the Western Pamirs and 20 l per sec per sq km in the Greater Caucasus.


Karta podzemnogo stoka SSSR (zona intensivnogo vodoobmena): Masshtab 1:5,000,000. Moscow, 1965.
Karta podzemnogo stoka SSSR v protsentakh ot obshchego rechnogo stoka i koeffitsientov podzemnogo stoka v protsentakh ot osadkov: Masshtab 1:5,000,000. Moscow, 1965.
Podzemnyi stok na territorii SSSR. Moscow, 1966.


References in periodicals archive ?
The proposed reservoir would recharge the subsurface flow of karez, shallow wells and tube-wells, protect the agriculture land and human settlements from devastation of floods during flood seasons and develop grazing zones for livestock.
This can be well-studied in the field of soil physics; some of very accurate models including Hydrous [1] and consol Metaphysics Subsurface Flow Module [2] which is used for solving PDEs for pressures that exist between soil and water particles in the porous media.
Physical processes responsible for water movement, driven by climate variables, include evaporation, condensation, precipitation, infiltration, run-off, and subsurface flow.
Horizontal subsurface flow constructed wetland systems (HSF-CWs), used in the treatment of wastewater, have advantages such as reduced cost and simplicity of operation, low mechanization demand, low maintenance requirement and good rates of efficiency (Fia, Matos, Fia, Borges, & Teixeira, 2012; Prata, Matos, Cecon, Lo Monaco, & Pimenta, 2013; Zhang et al.
Included is a sound examination of subsurface flow processes and the variable source area model of streamflow generation in the headwater catchment--vital concepts for students in this field, as well as the managers of the resource, that are often overlooked.
Scientists say it's likely a shallow subsurface flow, with enough water wicking to the surface to explain the darkening.
The darker color on Mars indicates that it's probably a shallow subsurface flow, NASA said.
Scientists say it s likely a shallow subsurface flow, with enough water wicking to the surface to explain the darkening.
The Mobility or movement of the pesticides is happened by leaching, surface drainage, subsurface flow, sorption by plants and / or microorganisms and adsorption on soil particles.
Subsurface flow: Subsurface flow refers to the type of flow that occurs below the soil.
The authors discuss nitrogen removal in lagoons, on-site wastewater systems, sludge freezing, pond effluent upgrading, soil aquifer treatment systems, subsurface flow constructed wetlands, and vertical flow wetlands.