Effects of Deforestation on Water Flow in the Vadose Zone

Wiekenkamp, Inge; Huisman, Johan Alexander; Bogena, Heye; Vereecken, Harry

doi:10.3390/w12010035

Cited by 22 publications

(27 citation statements)

References 53 publications

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“…In this context, Lange et al (2009) [65] were able to demonstrate positive effects of tree root density on rapid infiltration in stagnic soils. Wiekenkamp et al (2019) [66] compared in the Wüstebach (BRD) catchment the hydrology of a forest site with the neighboring clear-cut site. They concluded that infiltration via preferential flow paths increased after deforestation.…”

Section: Ecohydrologymentioning

confidence: 99%

Viscosity Controls Rapid Infiltration and Drainage, Not the Macropores

Germann

2020

Water

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The paper argues that universal approaches to infiltration and drainage in permeable media pivoting around capillarity and leading to dual porosity, non-equilibrium, or preferential flow need to be replaced by a dual process approach. One process has to account for relatively fast infiltration and drainage based on Newton's viscous shear flow, while the other one draws from capillarity and is responsible for storage and relatively slow redistribution of soil water. Already in the second half of the 19th Century were two separate processes postulated, however, Buckingham's and Richards' apparent universal capillarity-based approaches to the flow and storage of water in soils dominated. The paper introduces the basics of Newton's shear flow in permeable media. It then presents experimental applications, and explores the relationships of Newton's shear flow with Darcy's law, Forchheimer's and Richards' equations, and finally extends to the transport of solutes and particles.

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Section: Ecohydrologymentioning

confidence: 99%

Viscosity Controls Rapid Infiltration and Drainage, Not the Macropores

Germann

2020

Water

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“…Regional simulations could thus benefit from regional soil maps, where available. In addition, land cover changes can affect soil properties (Wiekenkamp et al, 2020), which means that the adjustment of SHPs in response to vegetation changes (such as deforestation) could further improve LSM simulations.…”

Section: Shortcomings and Scope For Further Researchmentioning

confidence: 99%

Simulating the Dry Chaco Hydrology under Deforestation Pressure

Maertens¹,

Lannoy²,

Apers³

et al. 2020

Preprint

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Abstract. Various regions in the world experience land cover and land use changes. One such a region is the Dry Chaco ecoregion in South America, characterized by deforestation and forest degradation since the 1980s. In this study, we simulated the water balance over the Dry Chaco and assessed the impact of land cover changes thereon, using three different state-of-the-art land surface models (LSMs) within the NASA Land Information System (LIS) with updated parameters. The default LIS parameters were revised with (i) improved soil parameters, (ii) satellite-based dynamic vegetation parameters instead of default climatological vegetation parameters, and (iii) yearly land cover information instead of static land cover. A relative comparison in terms of water budget components and ‘efficiency space’ for various baseline and revised experiments showed that large regional and long-term differences relate to different LSM structures, whereas smaller local differences resulted from updated soil, vegetation and land cover parameters. Furthermore, different LSM structures redistributed water differently in response to these parameter updates. A time series comparison of the simulations to independent satellite-based estimates of evapotranspiration and brightness temperature showed that no LSM setup significantly outperformed another for the entire region, and that not all LSM simulations improved with updated parameter values. However, the revised soil parameters generally reduced the simulated surface soil moisture bias relative to pixel-scale in situ observations, and the simulated Tb bias relative to regional Soil Moisture Ocean Salinity (SMOS) observations.

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“…They found that the lower evapotranspiration caused an increase in soil water content in the deforested portion of the catchment in the first 2 years after deforestation, especially during the summer periods, which led to a greater number of high flows. In addition, Wiekenkamp et al (2020) found that the partial clear-cut increased the occurrence of preferential flow in the deforested area.…”

Section: Introductionmentioning

confidence: 98%

“…From August to September 2013, 8.6 ha of the catchment area of the Wüstebach were cleared to allow natural succession to a mixed beech (Fagus sylvatica) forest (Figure 1). This deforestation has impacted the hydrological system of the Wüstebach catchment in many ways (Wiekenkamp et al, 2020;Wiekenkamp et al, 2016a). Evapotranspiration in the clear-cut area was first reduced by approximately 50% and returned towards pre-cut values during the first 2 years (Ney et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Long‐term stable water isotope and runoff data for the investigation of deforestation effects on the hydrological system of the Wüstebach catchment, Germany

Bogena

Stockinger

Lücke

2020

Hydrological Processes

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The Wüstebach catchment belongs to the German TERENO (Terrestrial Environmental Observatories) network and was partially deforested (21%) by the Eifel National Park in 2013. In this data paper, we provide 11-year precipitation and stream water isotope data and the corresponding runoff discharge rates recorded in the Wüstebach catchment (from 2009 to 2019). In addition, we provide an overview of available datasets and access information for environmental data of the Wüstebach catchment that are discoverable with associated metadata at the Web-based TERENO data portal. We anticipate that this comprehensive data set will give new insights in how deforestation influences the hydrological system, for exampole, in terms of transit time distribution, fraction of young water and water flow paths at the catchment scale.

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Effects of Deforestation on Water Flow in the Vadose Zone

Cited by 22 publications

References 53 publications

Viscosity Controls Rapid Infiltration and Drainage, Not the Macropores

Viscosity Controls Rapid Infiltration and Drainage, Not the Macropores

Simulating the Dry Chaco Hydrology under Deforestation Pressure

Long‐term stable water isotope and runoff data for the investigation of deforestation effects on the hydrological system of the Wüstebach catchment, Germany

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