Soilwater dynamics related to waterlogging in a sloping catchment

Atputhanathan, C.S.; Gunawardena, E. R. N.; Rushton, K. R.

doi:10.1016/0022-1694(91)90095-y

Cited by 3 publications

(3 citation statements)

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“…Also the vegetation canopy dissipates the kinetic energy of raindrop impact, reducing surface sealing. Models of the dynamic response of subsurface flow and runoff generation (Philip, 1991) are available for varied environments such as the eastern dry zone of Sri Lanka (Atputhanathan et al , 1991), the forested glacial till slopes of Sweden (Espeby, 1990b) and during snow melt (Espeby, 1990a;Duffy et al, 1991). Three conclusions can be drawn from recent studies.…”

Section: Water Pathwaysmentioning

confidence: 99%

“…First, material properties, such as hydraulic conductivity (Espeby, 1990a), macropores and macrostructures such as old root channels (Espeby, 1990b) have a control on the horizontal and vertical at WAYNE STATE UNIVERSITY on March 23, 2015 ppg.sagepub.com Downloaded from 426 distribution and movement of subsurface water. Secondly, process modelling should be based on space-discrete, time finite difference routines and ideally be dynamic in character (Duffy et al , 1991), due to their complex nature (Atputhanathan et al , 1991). Thirdly, applied geomorphological problems require the predicition of hillslope soil-water conditions from restricted data (Hata and Anderson, 1990), where lumped sequential flow forecasting needs to be used for estimating parameters such as mean soil-water storage.…”

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confidence: 99%

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Slopes and slope processes

Allison

1991

Progress in Physical Geography: Earth and Environment

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Magazine advertisements and television commercials must arouse interest in the first few words, otherwise the audience will turn the page or go to the kitchen for a cold beer. Likewise argues Mumpton (1990), the introduction of a scientific paper must, in a few short sentences, convince the reader that it is worthwhile to read on. Of importance in a progress report on slopes and slope processes is the need to synthesize in a relevant and interesting manner, the results of research from a number of disciplines. Scholz (1990) emphasizes this in the introduction to his recent book. He notes that due to the way in which science is organized, research workers are trained by discipline and not by topic. Consequently interdisciplinary subjects tend to be attacked in a piecemeal fashion, from the perspective of the different specialities that find application in studying it. Disadvantages arise because progress is hampered by lack of communication between disciplines, misunderstandings can abound and different, sometimes conflicting schools of thought flourish in the relative isolation of separate fields. Workers in one discipline may be ignorant of relevant facts established in another, or unaware of important evidence that would strengthen courage in their own convictions. Occasionally barriers to collaboration lie outside, rather than being set up within a subject area. Take the contributions of geomorphology to engineering as an example and landslide mapping surveys in particular (Griffiths and Hearn, 1990). Geomorphology has not yet received universal acceptance by civil engineers, geomorphological mapping is frequently applied only at the beginning of a project, despite being recognized as cost-effective tools other geomorphological techniques are often ignored and many geomorphologists have insufficient knowledge of design criteria to be gainfully employed on civil engineering projects. Here perhaps, is one example of where improved interaction between subject areas would bring benefit to all. I Water pathwaysSpatial and temporal sampling frameworks have implications for the accuracy of many studies (Krajewski et al., 1991). In mountainous regions the spatial distribution of water inputs to hillslopes are influenced by topographic factors such as slope angle, elevation and aspect. A new model developed and applied to Kyushu Island, Japan, suggests that within at WAYNE STATE UNIVERSITY on March 23, 2015 ppg.sagepub.com Downloaded from 424 a region, variation in water supply to hillslopes is often governed by orographic variables (Musiake and Koike, 1991). The effects of precipitation in semi-arid regions also partly depends on the angle of precipitation incidence, which in turn is influenced by slope angle. By quantifying links between variables such as slope angle and rainfall intensity on 11 1 instrumented 1 m x 1.5 m plots, Agassi et al. (1990) turned the slope angle/rainfall intensity/sediment erosion association to their advantage, determining the amount of phytogypsum required to prevent the dispersion of par...

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Section: Water Pathwaysmentioning

confidence: 99%

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confidence: 99%

Slopes and slope processes

Allison

1991

Progress in Physical Geography: Earth and Environment

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“…Therefore, many studies related to soil moisture dynamics have been undertaken and many quantitative simulation models have been developed during the last decade. However, most of the studies were focused on the catchment scale (Atputhanathan et al, 1991;Antonopoulos, 1997;Chulsang et al, 1998;Gusev et al, 1998;D'Haeze et al, 2003). For example, Hupet and Vanclooster (2002) addressed three basic questions related to the spatial (watershed scale) and temporal (intra-seasonal) dynamics of soil moisture and found that: (i) vegetation plays a significant role in temporal dynamics of the observed soil moisture distribution patterns; (ii) the spatial structure of these soil moisture distribution patterns was non-existent or only weakly characterized; (iii) there was a negative correlation between the spatial variability and the mean soil moisture.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal dynamics of soil moisture after rainfall events along a slope in Regosols of southwest China

Liu

Zhang

2006

Hydrological Processes

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Abstract:High frequency seasonal drought in purple soils (Regosols in FAO taxonomy) of the hilly upland areas of Sichuan basin, China, is one of the key restrictive factors for crop production. In order to manage irrigation and fertilizer application in these soils effectively, the soil water content in a sloped plot with 60 cm soil depth was measured by neutron probe devices to investigate the soil moisture regime during the 1998 rainy season after various amounts of rainfall events. The results showed that variation of soil moisture along the slope positions was highest in the top soil layer during the period of sporadic rainfall that did not induce any runoff. The coefficients of variation of soil moisture at various slope positions (upper, middle, and lower) are 17Ð36%, 8Ð95%, 10Ð25%, 8Ð58%, 8Ð05% and 9Ð21% at the 10 cm, 20 cm, 30 cm, 40 cm, 50 cm and 60 cm soil depths respectively. When surface runoff occurred, the soil moisture dynamics at various positions on the plot were then very different. Soil water content decreased more rapidly on the upper slope than on the middle and lower slope positions. When both surface runoff and throughflow occurred, the soil moisture dynamics in the various layers showed a stable period (soil water content is near constant as time elapses) that lasted about 1 week. Also, the pattern of moisture dynamics is 'decreasing-stabilization-decreasing'. Thus, irrigation and fertilization management according to the spatial and temporal features of soil moisture dynamics on sloped land can increase the water and fertilizer utilization efficacy by reducing their losses during the stable period.

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Groundwater aspects: losses are inevitable but re-use is possible?

Rushton¹

1999

Agricultural Water Management

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Soilwater dynamics related to waterlogging in a sloping catchment

Cited by 3 publications

References 5 publications

Slopes and slope processes

Slopes and slope processes

Spatial and temporal dynamics of soil moisture after rainfall events along a slope in Regosols of southwest China

Groundwater aspects: losses are inevitable but re-use is possible?

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