Effects of land cover on water table, soil moisture, evapotranspiration, and groundwater recharge: A Field observation and analysis

Zhang, Y.-K.; Schilling, Keith E.

doi:10.1016/j.jhydrol.2005.06.044

Cited by 161 publications

(128 citation statements)

References 22 publications

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“…Cropland expansions did not significantly increase ET in the GOM basin as a whole, but it needs to be pointed out that there are wide distributions of the range ( Figure 15). The effects of land management and land conversions on large-scale water cycles need to be further investigated through integrating field observations and finer resolution hydrological models [Andreassian, 2004;Jackson et al, 2005;Zhang and Schilling, 2006;Rotter et al, 2011].…”

mentioning

confidence: 99%

Long‐term trends in evapotranspiration and runoff over the drainage basins of the Gulf of Mexico during 1901–2008

Liu

Tian

Yang

et al. 2013

Water Resources Research

111

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[1] The Gulf of Mexico (GOM) is facing large pressures from environmental changes since the beginning of the last century. However, the magnitude and long-term trend of total water discharge to the GOM and the underlying processes are not well understood. In this study, the dynamic land ecosystem model (DLEM) has been improved and applied to investigate spatial and temporal variations of evapotranspiration (ET) and runoff (R) over drainage basins of the GOM during 1901-2008. Modeled ET and discharge were evaluated against upscaled data sets and gauge observations. Simulated results demonstrated a significant decrease in ET at a rate of 15 mm yr À1 century À1 and an insignificant trend in runoff/precipitation (R/P) and river discharge over the whole region during 1901-2008. However, the trends in estimated water fluxes show substantial spatial and temporal heterogeneities across the study region. Generally, in the west arid area, ET, R, and R/P decreased; while they increased in the eastern part of the study area during the last 108 years. In the recent 30 years, this region experienced a substantial decrease in R. Factorial simulation experiments indicate that climate change, particularly P, was the dominant factor controlling interannual variations of ET and R; while land use change had the same magnitude of effects on long-term trends in water fluxes as climate change did. To eliminate modeling uncertainties, high-resolution historical meteorological data sets and model parameterizations on anthropogenic effects, such as water use and dam constructions, should be developed.

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confidence: 99%

Long‐term trends in evapotranspiration and runoff over the drainage basins of the Gulf of Mexico during 1901–2008

Liu

Tian

Yang

et al. 2013

Water Resources Research

111

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“…Leduc et al 1997;Zhang and Schilling 2006). Despite the variation, data have been -where possible -collected or filtered for the same seasons and are therefore reliable for this study.…”

Section: Discussionmentioning

confidence: 99%

Aquifer vulnerability using recharge, depth to groundwater, soil type and slope to classify the vadose zone (Molototsi and Middle Letaba quaternary catchments, Limpopo Province, South Africa)

Makonto

Dippenaar

2014

Environ Earth Sci

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The aquifer vulnerability of the Molototsi (B81G) and Middle Letaba (B82D) quaternary catchments was assessed to determine the influence of the vadose zone on the groundwater regime. The aquifer vulnerability was assessed by developing a new method, which evaluates the vadose zone as a pathway for pollutants by using the following four parameters: Recharge, Depth to water table, Soil type (saturated vertical hydraulic conductivity) and Slope (RDSS). Recharge was estimated using the Chloride-mass balance method and the depth to the water table was measured in the field using dipmeter. The seepage behaviour (soil type) was determined as hydraulic conductivity from in-situ infiltration and percolation testing (SABS 0252-2:1993 and double ring infiltrometer). The slopes were determined with the digital elevation method using ArcGIS software. The four parameters were overlaid using Weighted Sum, Weighted Overlay and Raster Calculator to produce the vulnerability map. Different weightings were attributed in the methods and the best selected. The results obtained indicated high vulnerability on the lower and upper parts of both catchments. The benefits of the method described are (a) the easy quantification of the parameters through fairly simple methods and (b) the exclusion of arbitrary index values.

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“…It is well recognized that land cover and land use change have significant effects on hydrological processes such as evapotranspiration (ET), soil moisture and groundwater recharge [1,2]. Increasing or decreasing measures of soil and water conservation changes both the land cover and land use, which could alter the hydrologic cycle and affect the quantity of water that is available for runoff, streamflow and ground water flow.…”

Section: Introductionmentioning

confidence: 99%

“…The impacts of land-use changes on the quantity of groundwater have received considerable attention based on field observations. Zhang and Schilling [2] studied the effects of land cover on the water table, soil moisture, evapotranspiration, and groundwater recharge through water level measurements that were collected from two monitoring wells that were situated in the central portion of the Walnut Creek watershed at the Neal Smith National Wildlife Refuge in Jasper County, Iowa. Scanlon et al [6] studied the impact of the conversion of natural rangeland ecosystems to agricultural ecosystems on groundwater recharge and quality through point and areal studies in the southwestern US.…”

Section: Introductionmentioning

confidence: 99%

Effects of Soil and Water Conservation Measures on Groundwater Levels and Recharge

Wang

Gao

et al. 2014

Water

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Abstract:Measures of soil and water conservation (SWC) could affect the hydrological process. The impacts of typical measures on groundwater recharge, levels and flow were analyzed based on simulated rainfall experiments and a groundwater model. The three-dimensional finite-difference groundwater flow model (MODFLOW) was calibrated and verified for bare slope, grassland and straw mulching scenarios based on the experiments. The results of the verification in groundwater balance, levels, runoff and flow field all showed that MODFLOW could be applied to study the impact of SWC measures on groundwater. Meanwhile, the results showed the recharge rate (α) and specific yield of the three soil layers (Sy1, Sy2 and Sy3) were the most sensitive parameters to the change in the underlying surface. Then, the impacts of the SWC measures' construction and destruction on the groundwater regime were studied. The results indicated the measures could strengthen groundwater recharge. The amounts of groundwater recharge, runoff and level were on the order of straw mulching > grassland > bare slope. When the underlying surface was converted from grass and mulching to bare slope, the recharge decreased by 42.2% and OPEN ACCESSWater 2014, 6 3784 39.1%. It was concluded that SWC measure construction would increase groundwater recharge and the measure destruction would decrease recharge.

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Effects of land cover on water table, soil moisture, evapotranspiration, and groundwater recharge: A Field observation and analysis

Cited by 161 publications

References 22 publications

Long‐term trends in evapotranspiration and runoff over the drainage basins of the Gulf of Mexico during 1901–2008

Long‐term trends in evapotranspiration and runoff over the drainage basins of the Gulf of Mexico during 1901–2008

Aquifer vulnerability using recharge, depth to groundwater, soil type and slope to classify the vadose zone (Molototsi and Middle Letaba quaternary catchments, Limpopo Province, South Africa)

Effects of Soil and Water Conservation Measures on Groundwater Levels and Recharge

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