• Land-use/land-cover (LULC) change is considered a key human factor influencing groundwater recharge in floodplains. (researchgate.net)
  • Groundwater uptake of forest and agricultural land covers in regions of recharge and discharge. (sisef.it)
  • In this study, results of water table monitoring under forest plantations and adjacent corn plots in discharge and recharge regions were analyzed to gain better understanding of the relation of vegetation cover to groundwater uptake. (sisef.it)
  • In the recharge zone the water table under the black locust plantation showed step-like changes referring to the lack of groundwater supply. (sisef.it)
  • The low ET gw of the young black locust plantation was due to the lack of groundwater supply in recharge area, but also the shallow root system might have played a role. (sisef.it)
  • Our results suggest that considerations should be given to local estimations of ET gw from water table measurements that could assist to better understanding of groundwater use of varying vegetation types in recharge and discharge zones. (sisef.it)
  • Discharge and recharge regions of groundwater can be identified by changes of water table levels with depth, surface water networks and vegetation patterns ( [38] , [39] ). (sisef.it)
  • Recharge areas occur where the net saturated flow of groundwater is directed away from the water table ( [14] ). (sisef.it)
  • Rainfall recharge to the groundwater system is multiplied by this quantity. (bioregionalassessments.gov.au)
  • These abstractions from the lake and groundwater system will reduce recharge to the lake and will impact on lake levels, and could result in changing the hydraulic gradient of groundwater, with the potential for saltwater migration from the sea into the lake (Weitz and Demlie, 2014). (scielo.org.za)
  • Since many parts of Iran are located in arid and semi-arid regions of the world, groundwater recharge is an important component of the water cycle in these areas. (ac.ir)
  • In this paper, groundwater recharge under different irrigation scenarios for thirty logs lied in Neishabour plain was investigated. (ac.ir)
  • Analysis of the recharge rate in the wheat-fallow scenario showed that for different soil textures, groundwater recharge is dependent on the number of irrigation applications. (ac.ir)
  • In the case of a double-cropping scenario, groundwater recharge increased due to irrigation of tomato in summer. (ac.ir)
  • Comparison of groundwater recharge in a sprinkler- and furrow-irrigated field using unsaturated zone modeling. (ac.ir)
  • Ebrahimian, H. and Hassanli, M. (2016) Irrigation and groundwater recharge . (ac.ir)
  • A root zone modelling approach to estimating groundwater recharge from irrigated areas. (ac.ir)
  • Estimation of groundwater recharge in irrigated farms using unsaturated zone modeling, case study: Neyshabour Plain. (ac.ir)
  • Estimating groundwater recharge using deep vadose zone data under typical irrigated cropland in the piedmont region of the North China Plain. (ac.ir)
  • The soluble salts in the groundwater are absorbed by the upward water flow and finally moved into the soils. (iwaponline.com)
  • Soils vary greatly in their ecological properties , depending on parent substrate, grain size, composition, humus contents, relief profiles and depth to groundwater. (berlin.de)
  • Dead ice sinks resulted from blocks of ice remaining from the last ice age which melted away later and which today appear as round, sometimes water-filled depressions featuring groundwater-influenced soils and bog associations. (berlin.de)
  • These include primarily moraine plateaus with sand wedges, moraine hills, glacial meltwater channels with groundwater soils and bogs, river leas with fluvisols, gyttjas and peats, and dunes. (berlin.de)
  • Discharge of both solids and liquids to the soils caused the soil pores to clog, and contaminated water entered surface waters and groundwater. (edcgov.us)
  • Those limit values of contamination in groundwater and soils above which site characterization and risk assessment are required. (eni.com)
  • Wet weather results in shallow groundwater depths and saturated soils, whereas dry weather results in lower groundwater depths. (no-tillfarmer.com)
  • These fluctuations in the moisture and saturation levels of the soils are affected by freeze-thaw, wetting-drying cycles, and groundwater location. (trb.org)
  • While there are various techniques developed to mitigate the slope stability problems caused by these soils in embankments, this study proposes to test and evaluate innovative geosynthetic materials (e.g., wicking geotextile, capillary barrier geocomposites, geonets and others) to drain water out of the slope systems to minimize the swelling and shrinking of clays and heaving and thaw settling of silty soils. (trb.org)
  • Scalable nitrate sensors (sensors which are small and inexpensive) would enable us to better assess non-point source pollution processes in agronomic soils, groundwater and rivers. (escholarship.org)
  • Roots can utilize water in the capillary fringe. (usda.gov)
  • An in situ remediation technique applicable to saturated soil and the capillary fringe that consists of blowing pressurized air into saturated soil to cause the volatilization and desorption (stripping) of volatile and semi-volatile organic compounds. (eni.com)
  • An in situ remediation technique applicable to the saturated zone and the capillary fringe that consists of injecting oxygen or air at a low pressure into the aquifer to stimulate the biodegradation of organic compounds adsorbed into the saturated soil, by the native microorganisms naturally present. (eni.com)
  • Pollutants that penetrate through the capillary fringe, due to this wetting-front movement or to groundwater table fluctuations, are subject to transport in the aquifer. (eni.com)
  • The water table separates the groundwater zone that lies below it from the capillary fringe, or zone of aeration, that lies above it. (newsbasis.com)
  • First, data such as regional hydrogeological parameters and types of contaminants were obtained via hydrogeological drilling, groundwater well monitoring, pumping tests, and laboratory permeability tests, which helped identify the most serious pollution factor: chloroform. (mdpi.com)
  • The generation of steam at a given location during the experiments was significantly affected by the energy intensity (a function of heater power and spacing), soil permeability, depth below the groundwater level, and the cooling effect caused by the groundwater flux. (serdp-estcp.org)
  • stated that various types of salts in groundwater could cause different characteristics and processes of the groundwater flow. (iwaponline.com)
  • Steady Seepage in Trenches and Dams: Effect of Capillary Flow. (wikipedia.org)
  • Lateral groundwater flow can cause a large rise in water table at toeslope and depressional landscape positions. (usda.gov)
  • The rapid toeslope water table rise was likely caused by lateral groundwater flow whereas minor water table rise at the other positions was likely due to preferential flow since the soil had not wet up below 0.6 m. (usda.gov)
  • The hydraulic processes include, for example, the flow of groundwater and the transport of radionuclides dissolved in it. (grs.de)
  • In discharge regions the net saturated flow of groundwater is directed upward. (sisef.it)
  • The high ET of vegetation creates local depression of groundwater, which enhances the subsurface flow and further support the ET. (sisef.it)
  • The groundwater flow is laminar in the bottom of the aquifer around the drainage channel. (thepostzilla.com)
  • Groundwater-filled body of poorly permeable formations, through which still significant volumes of groundwater may move, although at low flow rates. (un-igrac.org)
  • Groundwater-filled bodies of poorly permeable formations, through which no or almost no flow of groundwater passes. (un-igrac.org)
  • For the environment groundwater plays a very important role in keeping the water level and flow into rivers, lakes and wetlands. (newsbasis.com)
  • Groundwater flow returns to the surface again through springs and rivers. (newsbasis.com)
  • Some important topics include the properties of aquifers, the principles of groundwater flow, water chemistry, water quality and contamination, and groundwater development and management. (waveland.com)
  • Water transfer mechanisms in wetlands include surface water exchanges, groundwater exchanges and evapotranspiration losses, and inputs include precipitation and runoff from the surrounding areas in the form of overland flow pathways ( Acreman and Miller 2007 ). (chijournal.org)
  • The subsurface conditions that influence SVE effectiveness include soil lithology and heterogeneity, temperature, soil moisture and natural organic carbon content, and depth to groundwater. (frtr.gov)
  • Tide-induced seawater-groundwater circulation in shallow beach aquifers. (wikipedia.org)
  • Groundwater starts as rain (or other precipitation), and flows under ground for long periods of time through aquifers. (newsbasis.com)
  • Groundwater, which is in aquifers below the surface of the Earth, is one of the Nation's most important natural resources. (newsbasis.com)
  • Modelling Aquifers with Rectangular cells, Transport and Hydrodynamics) groundwater modelling software programme or the EauDyssée hydrogeological platform. (copernicus.org)
  • This reaction generates a non-soluble crystalline formation throughout the pores and capillary tracts of the concrete. (penetron.com)
  • The intermediate layer situated above the water table, between the "saturated" and "unsaturated" zone of an aquifer where ground water infiltration occurs by capillary action to fill pores in the soil. (eni.com)
  • Groundwater is fresh water (from rain or melting ice and snow) that soaks into the soil and is stored in the tiny spaces (pores) between rocks and particles of soil. (newsbasis.com)
  • The groundwater evaporation without salts or fresh groundwater became more popular. (iwaponline.com)
  • Capillary action readily brings dissolved salts near to the surface of the ground, and since most vegetation is intolerant of even slightly saline water (3-6 g/litre), the plant roots die as a result. (abg-geosynthetics.com)
  • Secondary , to the accumulation of hygroscopic salts that are typically contained within groundwater and deposited within the wall as evaporation occurs. (property-care.org)
  • Even when the source of capillary rise has been addressed there may still be a need to address the accumulation of salts. (property-care.org)
  • As previously explained there are two considerations when considering rising damp, the control of capillary rise of water and the removal of any salts that may have accumulated. (property-care.org)
  • However, if we go through a dry cycle shortly after establishing these strips, headlands may still be one of the worst areas of the field as there will not be enough rain or snow melt to push the salts out of the root zone despite lower groundwater depths. (no-tillfarmer.com)
  • The total dissolved solids (TDS) of the groundwater that was dissolved with KCl or NaCl affected the capillary water gravity more than soil pore structure. (iwaponline.com)
  • The TDS of the groundwater that was dissolved with CaCl 2 or MgCl 2 affected both the capillary water gravity and the soil pore structure. (iwaponline.com)
  • Groundwater is usually not found in intact salt deposits since salt is impermeable to water. (grs.de)
  • Nevertheless, only little detailed monitoring of water table fluctuations and groundwater uptake (ET gw ) were reported under varying hydrologic conditions and vegetation cover. (sisef.it)
  • The water table under the poplar plantation displayed a night-time recovery in the discharge region, indicating significant groundwater supply. (sisef.it)
  • In this case an empirical version of the water table fluctuation method was used for calculating the ET gw that included the groundwater supply. (sisef.it)
  • The Hungarian Great Plain is one of the main target regions for afforestation ( [15] ) where the mean annual precipitation is less than 650 mm, thus the water demand of forests is often completed from the groundwater. (sisef.it)
  • The water table is close to the surface, thus the vegetation often rely on the groundwater ( [22] , [27] ). (sisef.it)
  • In this paper, we consider the loss function for root zones in contact with ground water through capillary upflow and including deep root systems. (monash.edu)
  • However, increased evapotranspiration under dry weather results in increased wicking up of soil water (capillary rise) towards the surface, says Naeem Kalwar. (no-tillfarmer.com)
  • When ditches are full of water, the groundwater depths in the ditches and headlands are similar (Figure 2). (no-tillfarmer.com)
  • Natural surface water and groundwater. (un-igrac.org)
  • In Romania the total amount of water transferred from the soil profile to the groundwater (calculated from the difference between cumulated drained water and the cumulated upward flux by capillary rise) was higher in conventional plots than in organic ones. (orgprints.org)
  • Water table, also called groundwater table, upper level of an underground surface in which the soil or rocks are permanently saturated with water. (newsbasis.com)
  • Groundwater accounts for nearly 95 percent of the nation's fresh water resources. (newsbasis.com)
  • Globally, irrigation accounts for more than 70% of total water withdraw (both surface and groundwater). (newsbasis.com)
  • Groundwater is estimated to be used for circa 43% of the total irrigation water use. (newsbasis.com)
  • Groundwater (or ground water) is water located below the ground surface. (newsbasis.com)
  • Groundwater is an important part of the water cycle. (newsbasis.com)
  • Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. (newsbasis.com)
  • Groundwater supplies drinking water for 51% of the total U.S. population and 99% of the rural population. (newsbasis.com)
  • It often takes more work and costs more to access groundwater as opposed to surface water, but where there is little water on the land surface, groundwater can supply the water needs of people. (newsbasis.com)
  • What's the difference between groundwater and the water table? (newsbasis.com)
  • Groundwater is water that exists underground in saturated zones beneath the land surface. (newsbasis.com)
  • Surface water - groundwater fluxes: four parameters that define the boundary conditions for the movement of water from groundwater to the river. (bioregionalassessments.gov.au)
  • The objective of this study was to explore options for incorporating and defining wetlands in PCSWMM, select groundwater interaction parameters, and optimize the process for creating a calibrated catchment-wetland model using known seasonal wetland water levels. (chijournal.org)
  • The discussion will address the value of a model which can both adequately represent the development and the wetland by incorporating infiltration-runoff effects, evapotranspiration changes, LID practices, groundwater regimes, and dynamic feedbacks between the wetland water level and the system. (chijournal.org)
  • In addition, abstraction from groundwater in the lake's catchment and abstractions from the lake for local community water supply are relatively recent developments. (scielo.org.za)
  • AquiFR computes the groundwater level, the groundwater-surface-water exchanges and the river flows. (copernicus.org)
  • It is hypothesized that these innovative geosynthetics will prevent the migration of water from groundwater and/or other sources (e.g., precipitation, snow melting) and keep the embankment slopes under fully unsaturated conditions. (trb.org)
  • Application and Assessment of a Developed Coupled-Groundwater-Surface Water Model in the Neishaboor Watershed. (ac.ir)
  • Inorganic nitrogen (nitrate, NO3-) is a major source of pollution in groundwater, surface water and the air. (escholarship.org)
  • The role of capillary forces in steady‐state and transient seepage flows. (wikipedia.org)
  • Evapotranspiration (ET) by local phreatophytic vegetation is one of the primary processes of natural groundwater discharge. (sisef.it)
  • We develop analytical solutions for the probability density functions for soil saturation and evapotranspiration for simple ecohydrological box models that are based on different vegetation groundwater feedbacks, for which numerical results have been presented earlier. (monash.edu)
  • Groundwater is an important component in many industrial processes. (newsbasis.com)
  • This research aimed to predict and quantify the migration process of contaminants in a microconfined aquifer by conducting a groundwater contamination investigation in an abandoned chemical plant in the Jiangsu Province of China. (mdpi.com)
  • In semi-arid regions, root zone salinization may occur as a result of groundwater quality and ineffective root zone leaching. (monash.edu)
  • The entire concrete matrix is now impermeable, stopping the penetration of groundwater and liquids from any direction, even under high hydrostatic pressures. (penetron.com)
  • Groundwater uptake of vegetation in discharge regions is known to play an important role, e.g. , in the Hungarian Great Plain. (sisef.it)
  • In the case of intermediate groundwater levels and wetter climates, a feedback model that regulates groundwater uptake in response to root zone wetness regulates the transpiration most realistically. (monash.edu)
  • Capillary rise is capable of demonstrating the mechanism involved in groundwater evaporation, where the evaporation from saliferous groundwater could be quantized in accordance with fresh groundwater. (iwaponline.com)
  • The results demonstrated that the capillary action played a dominant role only within a very short period of time at the beginning of evaporation (i.e. within 2 min). (iwaponline.com)
  • 1.0) had the potential to calculate the saliferous-groundwater evaporation in accordance with the fresh-groundwater evaporation. (iwaponline.com)
  • is commonly used to calculate groundwater evaporation. (iwaponline.com)
  • The total dissolved solids (TDS) in groundwater is not commonly considered, which is a significant issue in arid regions. (iwaponline.com)
  • In other words: the piezometric level of groundwater in an artesian aquifer is located above ground level. (un-igrac.org)
  • 1999) and (Geng and M.C. 2015), submarine groundwater discharge (Li et al. (wikipedia.org)
  • Direct discharge of wastewater to surface waters, groundwater, or ground surfaces will result in public health hazards. (edcgov.us)
  • Naturally, the root system of the poplar was able to tap the groundwater in depths of 3.0-3.3 m while the shallower roots of the corn did not reach the groundwater reservoir in depths of 2.7-2.8 m. (sisef.it)
  • The mean ET gw was 0.7 mm day -1 (groundwater depths of 3.0-3.2 m) and similarly no ET gw was detected at the adjacent corn plot with groundwater depths between 3.2 and 3.4 m. (sisef.it)
  • then removing the 'bridge' should hopefully be sufficient to control the capillary rise of moisture in the wall. (property-care.org)
  • The systems detailed so far all look at preventing the capillary rise of moisture in a wall and additional consideration will need to be given for an appropriate plaster system. (property-care.org)
  • Groundwater that is under pressure when tapped by a well and is able to rise above the level at which it is first found. (calandbrokers.com)
  • The Arabian Gulf location means a solution was required to provide a salt barrier / break layer to line the base and sides of the tree pits since the saline groundwater table is relatively close to the surface. (abg-geosynthetics.com)
  • Luo & Sophocleous (2010) measured the groundwater contributions to cropland via lysimeter observation data and a model simulation. (iwaponline.com)
  • Multivariate analysis is used to compensate these interferences from ionic and neutral species and baseline from dissolved organic species in groundwater, and calculate nitrate concentration precisely. (escholarship.org)
  • Finally, a further feedback between upper root zone density and transpiration regulation in the loss function highlights dependence of deep rooted vegetation on groundwater. (monash.edu)
  • The source code TOUGH2 ("Transport Of Unsaturated Groundwater and Heat") was developed at the Lawrence Berkeley National Laboratories in the USA. (grs.de)
  • The two types of experiments included 12 treatments with four solutes (KCl, NaCl, CaCl 2 , and MgCl 2 ) that were dissolved in groundwater at three concentrations (5, 30, and 100 g/L), and one control treatment without the salt solutions. (iwaponline.com)