scholarly journals Observation and simulation of water movement and runoff in a coarse texture water repellent soil

CATENA ◽  
2021 ◽  
Vol 207 ◽  
pp. 105637
Author(s):  
Seyedeh Mehrnoosh Mirbabaei ◽  
Mahmoud Shabanpour ◽  
Jos van Dam ◽  
Coen Ritsema ◽  
Aliasghar Zolfaghari ◽  
...  
1996 ◽  
Vol 184 (3-4) ◽  
pp. 153-173 ◽  
Author(s):  
J.C. van Dam ◽  
J.H.M. Wösten ◽  
A. Nemes

2018 ◽  
Vol 17 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Yichen Wang ◽  
Xiaofang Wang ◽  
Henry Wai Chau ◽  
Bingcheng Si ◽  
Ning Yao ◽  
...  

1996 ◽  
Vol 32 (10) ◽  
pp. 3051-3061 ◽  
Author(s):  
Bangjie Yang ◽  
Paul S. Blackwell ◽  
David F. Nicholson

Soil Research ◽  
2015 ◽  
Vol 53 (2) ◽  
pp. 168 ◽  
Author(s):  
L. L. Walden ◽  
R. J. Harper ◽  
D. S. Mendham ◽  
D. J. Henry ◽  
J. B. Fontaine

There is an increasing interest in eucalypt reforestation for a range of purposes in Australia, including pulp-wood production, carbon mitigation and catchment water management. The impacts of this reforestation on soil water repellency have not been examined despite eucalypts often being associated with water repellency and water repellency having impacts on water movement across and within soils. To investigate the role of eucalypt reforestation on water repellency, and interactions with soil properties, we examined 31 sites across the south-west of Western Australia with paired plots differing only in present land use (pasture v. plantation). The incidence and severity of water repellency increased in the 5–8 years following reforestation with Eucalyptus globulus. Despite this difference in water repellency, there were no differences in soil characteristics, including soil organic carbon content or composition, between pasture and plantation soils, suggesting induction by small amounts of hydrophobic compounds from the trees. The incidence of soil water repellency was generally greater on sandy-surfaced (<10% clay content) soils; however, for these soils 72% of the pasture sites and 31% of the plantation were not water repellent, and this was independent of measured soil properties. Computer modelling revealed marked differences in the layering and packing of waxes on kaolinite and quartz surfaces, indicating the importance of interfacial interactions in the development of soil water repellency. The implications of increased water repellency for the management of eucalyptus plantations are considered.


2018 ◽  
Vol 98 (3) ◽  
pp. 407-420 ◽  
Author(s):  
Xiaofang Wang ◽  
Yi Li ◽  
Yichen Wang ◽  
Chuncheng Liu

Soil water repellency affects soil water movement during infiltration significantly. The HYDRUS software has been popularly applied in soil water dynamics simulation for many years, but its performance in water-repellent (WR) soils has not been assessed thoroughly. Our objectives are to assess the performance of HYDRYUS-1D for cumulative infiltration (CI), wetting front (Zf), and volumetric soil water content (θv) during horizontal imbibition and vertical infiltration in wettable, slightly WR, and strongly WR soils. The key parameters of α and n in water retention curves were inversely estimated by RETension Curve software. The α and n were calibrated inversely until the observed data fitted the simulated values well enough. The α and n were then used for validation using three statistical parameters including relative root-mean-square error, R2, and Nash–Sutcliffe efficiency coefficient. The performances of calibration and validation for wettable, slightly, and strongly WR soils were good enough to be used for further simulations (RRMSE ≤20.2% for calibration and ≤21.1% for validation). Soil water movements for strongly WR soils of variable ponded depth during vertical infiltration were simulated. For Lou soil, as the ponded depth increased from 4 to 10 cm, the CI and Zf increased 2.08 and 5.5 cm, respectively. The simulations for the other three soils also showed gradually increased CI and Zf values. In conclusion, the performances of HYDRUS-1D in four different soil types with changing WR levels were good, which confirmed the application of HYDRUS-1D in WR soils.


Author(s):  
Robert F. Keefer

Inherent properties of a soil determine the extent to which that soil will erode. These properties are soil texture, soil structure, soil permeability, and the amount of soil organic matter. Soil texture consists of a mixture of soil particle sizes of sand, silt, and clay. Soil texture is also related to water movement into the soil [infiltration] and water movement through a soil (permeability). Sand grains are large and difficult to move; however, they are easily detached. Clay particles often stick together and therefore are difficult to detach; however, once detached the clays remain suspended and are easily carried and separated from the original soil mass by water. Silt is intermediate in size between sand and clay, but silt is both easily detached and easily transported. Thus, any soil that has large amounts of silt will erode easily. Infiltration. Water moves into and within a soil through the large macropores and only a very limited amount in the small micropores. Sandy soils have many large pores allowing water to move into the soils by infiltration. Conversely, clay soils have many microspores through which water passes only very slowly. Therefore, during a moderate storm, runoff and erosion would be greater from a soil with more fine textured clays than from a soil where coarse texture dominates. Permeability. Once water enters a soil, it flows within the soil. The extent of internal movement of water in a soil is the permeability of that soil. A soil aggregate is a soil granule or soil crumb consisting of a number of soil grains, that is, silt or clay, held together by a cementing substance. Aggregation is the condition of a soil having many individual aggregates. Soils that have many large stable aggregate are more permeable and are difficult to detach and erode. An aggregate has stability when it is not broken easily by water. Soil aggregates help keep the soil receptive to rapid infiltration of water and keep water from moving over the soil and eroding it.


1983 ◽  
Vol 63 (2) ◽  
pp. 405-407 ◽  
Author(s):  
J. L. RICHARDSON ◽  
N. C. WOLLENHAUPT

Lignitic material located in a reshaped mine spoil at a depth of 35–53 cm was extremely water-repellent and no root growth was observed in or below this layer. The material is black (10YR 2/1) when dry and is easily identifiable. It is postulated that this layer may influence water movement and nutrient uptake because of the water repellency. Key words: Lignite, reclamation, strip mining, water repellency


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