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Dive into the research topics where Janet Hussein is active.

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Featured researches published by Janet Hussein.


Soil Research | 2007

A study of the interactions between salinity, soil erosion, and pollutant transport on three Queensland soils

Hossein Ghadiri; Janet Hussein; Calvin Wyatt Rose

The effects of salinity and sodicity on soil erosion, sediment transport, and runoff water quality were studied under the simulated rainfall using 3 soils whose salinity and sodicity were artificially raised. Soil type and salt treatment both affected sediment loss, with a significant interaction between the 2 factors. The salt treatment decreased aggregate stability, reduced aggregate mean weight diameters, and increased sediment loss for all soils, but the soil with the most stable aggregates (Redlands) showed the highest impact. The initial treatment resulted in a sharp rise in the electrical conductivity (EC) and exchangeable sodium percentage (ESP) of all 3 soils but these increases were much higher in the sandy Toohey soil than the 2 clay soils. Electrical conductivities of all 3 treated soils decreased during the rainfall events, but the Toohey soil showed the largest decrease. The ESP of the treated Toohey soil decreased rapidly during the rainfall event due to its coarse texture, rapid renewal of its pore water, and the accessibility of its exchange sites by ions in the solution. The EC of the treated Redlands clay was reduced and its ESP increased during the rainfall events, which resulted in the weakening of its stable aggregates and increased erosion. Sodium adsorption ratio and EC of runoff water from treated soils decreased rapidly with rainfall duration for all 3 soils, but runoff from Toohey showed the largest decrease. The interaction between increased salinity-sodicity and erosion thus appears to be heavily dependent on soil texture, degree of aggregation, and aggregate stability, the 3 determinant factors for soil porosity and pore-size distribution. The results indicate that large sediment and salt losses can occur in runoff from saline-sodic soils, even at low slopes and from apparently stable soils, with major downstream water quality consequences.


Soil Research | 2011

Effect of pasture buffer length and pasture type on runoff water quality following prescribed burning in the Wivenhoe Catchment

Hossein Ghadiri; Janet Hussein; Calvin Wyatt Rose

Burning of pastures is a management practice adopted by graziers worldwide. When rain falls on burnt pastures, it can lead to increased pollutant transport in runoff. However, this transport can be modified by vegetative buffers which intercept the runoff downslope of burnt areas. This study examines the effects of different pasture buffer lengths (0, 2, and 5 m) on sediment and chemical transport from two pasture sites near Wivenhoe Dam, the main water reservoir for Brisbane City. Simulated rainfall (100 mm/h) was applied to 18 plots on pasture sites after they were burnt, and insoluble and soluble components were measured in the runoff. Most eroded sediment/organic debris accumulated against the first row of the grass buffer strips or was deposited in the upslope backwater region. Buffer length had little impact on the runoff concentrations of NO3– and NO2– (NOx), total Kjeldahl nitrogen, and total nitrogen from the 5-m-length upslope plots but was significant for sediment loss rate, filterable reactive phosphate, ammonium, and total and dissolved organic carbon. Pasture type was significant for NOx, ammonium, sediment loss rate, and total organic carbon only. Burning increased enrichment ratios of nutrients and carbon in the runoff compared with unburnt plots, but a 2-m buffer strip subsequently reduced the enrichment ratio values by >30%. Buffers strips of unburnt pasture grass may provide an effective tool for post-fire erosion control following prescribed burning; however, further work including scaling to larger plot sizes and catchment level is required.


Journal of Hydrology | 2007

Prediction of surface flow hydrology and sediment retention upslope of a vetiver buffer strip

Janet Hussein; Bofu Yu; Hossein Ghadiri; Calvin Wyatt Rose


Journal of Hydrology | 2007

Dynamic erosion of soil in steady sheet flow

Calvin Wyatt Rose; Bofu Yu; Hossein Ghadiri; H. Asadi; Jean-Yves Parlange; W. L. Hogarth; Janet Hussein


Soil Science Society of America Journal | 2007

Sediment retention by a stiff grass hedge under subcritical flow conditions

Janet Hussein; Hossein Ghadiri; Bofu Yu; Calvin Wyatt Rose


Journal of Hydrology | 2007

An investigation of flow-driven soil erosion processes at low streampowers

H. Asadi; Hossein Ghadiri; Calvin Wyatt Rose; Bofu Yu; Janet Hussein


Journal of Hydrology | 2014

The links between water profile, net deposition and erosion in the design and performance of stiff grass hedges

Sina Akram; Bofu Yu; Hossein Ghadiri; Calvin Wyatt Rose; Janet Hussein


13th ISCO Conference | 2004

THE EFFECT OF SOIL SALINITY AND SODICITY ON SOIL ERODIBILITY, SEDIMENT TRANSPORT AND DOWNSTREAM WATER QUALITY

Hossein Ghadiri; Janet Hussein; E. Dordipour; Calvin Wyatt Rose


Soil Biology & Biochemistry | 2008

The effect of flow impedance on deposition of Cryptosporidium parvum oocysts with or without a vetiver buffer strip

Janet Hussein; Hossein Ghadiri; Mavourneen Lutton; Andrew Smolders; Peter Schneider


4th International Vetiver Conference: Vetiver and People | 2006

Vetiver buffer strips: modelling their effect on sediment and nutrient reduction from surface flow

Janet Hussein; Paul Truong; Hossein Ghadiri; Bofu Yu; Calvin Wyatt Rose

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Cyril A. A. Ciesiolka

Queensland Department of Natural Resources and Mines

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