Hillslope runoff and erosion on duplex soils in grazing lands in semi-arid central Queensland. II. Simple models for suspended and bedload sediment
D. M. SilburnA Agricultural Production Systems Research Unit, Department of Environment and Resource Management, PO Box 318, Toowoomba, Qld 4350, Australia. Email: mark.silburn@derm.qld.gov.au
B eWater Cooperative Research Centre, Innovation Centre, Building 22, University of Canberra, Canberra, ACT 2601, Australia.
Soil Research 49(2) 118-126 https://doi.org/10.1071/SR09069
Submitted: 21 April 2010 Accepted: 7 September 2010 Published: 10 March 2011
Abstract
The use of simple models of soil erosion which represent the main effects of management in grazing lands in northern Australia is limited by a lack of measured parameter values. In particular, parameters are needed for erosion models (sediment concentration v. cover equations) used in daily soil-water balance models. For this research, we specifically avoided equations that use rainfall and runoff rates (e.g. peak flow), as current daily models are limited in their ability to estimate these rates. The resulting models will therefore give poor estimates of soil losses for individual events, but should give good estimates of long-term average erosion and management influences.
Runoff and erosion data were available for 7 years on 12 hillslope plots with cover of 10–80%, with and without grazing, with and without tree canopy cover, on a variety of soils according to various soil classification systems. Soils were grouped into those derived from sandstone (SS), mudstone (MS), and eroded mudstone (MSe). These data were used to determine two parameters, i.e. (i) efficiency of entrainment for bare soil and (ii) a cover factor, for simple models of bedload and suspended sediment concentrations. Methods used to fit parameters affected the results; optimising to obtain the minimum sum of squares of errors in soil losses gave better results than fitting an exponential equation to sediment concentration–cover data.
The use of a linear slope factor in the sediment concentration models was confirmed with data from plots with slopes 4–8%. Parameters for the bedload sediment concentration model were the same for SS, MS, and MSe soils. Parameters for the suspended sediment concentration model were the same for SS and MS soils, but the MSe soil had a greater efficiency of entrainment for bare soil (about double). The sediment concentration–cover relationships and fitted cover factors were different for suspended and bedload sediment. Thus, the resulting modelled proportion of sediment as suspended load changed with cover, from ~0.3 for bare soil to 0.9 at 80% cover, mimicking the measured data. The cover factor was lower than published values for cultivated soils, indicating less reduction in sediment concentration with greater cover. A compilation of parameter values for the sediment concentration model from published and unpublished sources in grazing and cropping lands is provided.
Additional keywords: pasture cover, sediment delivery.
References
Carnahan JA (1990) Vegetation. In ‘Atlas of Australian resources. Third series. Vol. 6’. (Australian Surveying and Land Information Group, Department of Administrative Services: Canberra, ACT)Carroll C (2004) Temporal changes to runoff and erosion processes on disturbed landscapes under natural rainfall. PhD Thesis, University of Queensland, Brisbane, Australia.
Chilcott CR, Owens JS, Silburn DM, McKeon GM (2004) How long will soil resources last in semi-arid grazing systems? In ‘Conserving soil and water for society: Sharing solutions. 13th International Soil Conservation Organisation Conference’. Brisbane, Queensland. Paper 249. (Eds SR Raine, AJW Biggs, NW Menzies, DM Freebairn, PE Tolmie) (ASSSI/IECA: Brisbane, Qld)
Ciesiolka CAA (1987) Catchment management in the Nogoa watershed. Research Project Completion Report, AWRC Project 80/128, Australian Water Resources Council, Department of Resources and Energy, Canberra, ACT.
Ciesiolka CAA, Coughlan KJ, Rose CW, Escalante MC, Mohd. Hashim G, Paningbatan EP, Sombatpanit S (1995) Methodology for a multi-country study of soil erosion management. Soil Technology 8, 179–192.
| Methodology for a multi-country study of soil erosion management.Crossref | GoogleScholarGoogle Scholar |
Comia RA, Paningbatan EP, Hakansson I (1994) Erosion and corn yield response to soil conditions under alley cropping systems in the Philippines. Soil & Tillage Research 31, 249–261.
| Erosion and corn yield response to soil conditions under alley cropping systems in the Philippines.Crossref | GoogleScholarGoogle Scholar |
Dangler EW, El-Swaify SA, Ahuja LR, Barnett AP (1976) Erodibility of selected Hawaii soils by rainfall simulation. USDA ARS and University of Hawaii Agricultural Experimental Station Publication ARS-35.
Dilshad M, Motha JA, Peel LJ (1996) Surface runoff, soil and nutrient losses from farming systems in the Australian semi-arid tropics. Australian Journal of Experimental Agriculture 36, 1003–1012.
| Surface runoff, soil and nutrient losses from farming systems in the Australian semi-arid tropics.Crossref | GoogleScholarGoogle Scholar |
Fentie B (2001) Catchment-scale water erosion and deposition modelling: A physically-based approach. PhD Thesis, University of Queensland, Brisbane, Australia.
Fentie B, Ciesiolka CAA, Silburn DM, Littleboy M, Yu B, Rose CW (2004) Soil erosion and deposition modelling in a semi-arid grazing catchment in north central Queensland. In ‘Conserving soil and water for society: Sharing solutions. 13th International Soil Conservation Organisation Conference’. Brisbane, Queensland. Paper 610. (Eds SR Raine, AJW Biggs, NW Menzies, DM Freebairn, PE Tolmie) (ASSSI/IECA: Brisbane, Qld)
Freebairn DM, Wockner GH (1986) A study of soil erosion on vertisols of the eastern Darling Downs, Queensland. I. The effect of surface conditions on soil movement within contour bay catchments. Australian Journal of Soil Research 24, 135–158.
| A study of soil erosion on vertisols of the eastern Darling Downs, Queensland. I. The effect of surface conditions on soil movement within contour bay catchments.Crossref | GoogleScholarGoogle Scholar |
Freebairn DM, Loch RJ, Silburn DM (1996) Soil erosion and soil conservation for vertisols. Developments in Soil Science 24, 303–362.
| Soil erosion and soil conservation for vertisols.Crossref | GoogleScholarGoogle Scholar |
Grayson RB, Blöschl G (2000) Spatial modelling of catchment dynamics. In ‘Spatial patterns in catchment hydrology: Observations and modelling’. pp. 51–81. (Cambridge University Press: Cambridge, UK)
Greene RSB, Kinnell PIA, Wood JT (1994) Role of plant cover and stock trampling on runoff and soil erosion from semi-arid wooded rangeland. Australian Journal of Soil Research 32, 953–973.
| Role of plant cover and stock trampling on runoff and soil erosion from semi-arid wooded rangeland.Crossref | GoogleScholarGoogle Scholar |
Harms BP, Pointon SM (1999) Land resource assessment of the Brisbane Valley, Queensland. Department of Natural Resources, Brisbane. Land Resources Bulletin DNRQ990065.
Hutchinson ME, McIntyre S, Hobbs RJ, Stein JL, Garnett S, Kinloch J (2005) Integrating a global agro-climate classification with bioregional boundaries in Australia. Global Ecology and Biogeography 14, 197–212.
| Integrating a global agro-climate classification with bioregional boundaries in Australia.Crossref | GoogleScholarGoogle Scholar |
Isbell RF (1996) ‘The Australian Soil Classification.’ Australian Soil and Land Survey Handbook Vol. 4. (CSIRO Publishing: Collingwood, Vic.)
Keating BA, Carberry PS, Hammer GL, Probert ME, Robertson MJ, Holzworth D, Huth NI, Hargreaves JNG, Meinke H, Hochman Z, McLean G, Verburg K, Snow V, Dimes JP, Silburn M, Wang E, Brown S, Bristow KL, Asseng S, Chapman S, McCown RL, Freebairn DM, Smith CJ (2003) An overview of APSIM, a model designed for farming systems simulation. European Journal of Agronomy 18, 267–288.
| An overview of APSIM, a model designed for farming systems simulation.Crossref | GoogleScholarGoogle Scholar |
Littleboy M, Silburn DM, Freebairn DM, Woodruff DR, Hammer GL, Leslie JK (1992) The impact of soil erosion on sustainability of production in cropping systems. I. Development and validation of a simulation model. Australian Journal of Soil Research 30, 757–774.
| The impact of soil erosion on sustainability of production in cropping systems. I. Development and validation of a simulation model.Crossref | GoogleScholarGoogle Scholar |
Loch RJ, Donnollan TE (1983) Field rainfall simulator studies on two clay soils of the Darling Downs, Queensland. I. The effect of plot length and tillage orientation on erosion and runoff and erosion rates. Australian Journal of Soil Research 21, 33–46.
| Field rainfall simulator studies on two clay soils of the Darling Downs, Queensland. I. The effect of plot length and tillage orientation on erosion and runoff and erosion rates.Crossref | GoogleScholarGoogle Scholar |
McIvor JG, Williams J, Gardener CJ (1995) Pasture management influences runoff and soil loss in the semi-arid tropics. Australian Journal of Experimental Agriculture 35, 55–65.
| Pasture management influences runoff and soil loss in the semi-arid tropics.Crossref | GoogleScholarGoogle Scholar |
McKeon GM, Day KA, Howden SM, Mott JJ, Orr DM, Scattini WJ, Weston EJ (1990) Management of pastoral production in Northern Australian savannas. Journal of Biogeography 17, 355–372.
| Management of pastoral production in Northern Australian savannas.Crossref | GoogleScholarGoogle Scholar |
Nelson RA, Dimes JP, Paningbatan EP, Silburn DM (1998) Erosion/productivity modelling of maize farming in the Philippine uplands. Part I: Parameterising the Agricultural Production Systems Simulator. Agricultural Systems 58, 129–146.
| Erosion/productivity modelling of maize farming in the Philippine uplands. Part I: Parameterising the Agricultural Production Systems Simulator.Crossref | GoogleScholarGoogle Scholar |
O’Reagain PJ, Brodie J, Fraser G, Bushell JJ, Holloway CH, Faithful JW, Haynes D (2005) Nutrient loss and water quality under extensive grazing in the upper Burdekin river catchment, North Queensland. Marine Pollution Bulletin 51, 37–50.
| Nutrient loss and water quality under extensive grazing in the upper Burdekin river catchment, North Queensland.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXitF2guro%3D&md5=ae1020cb6769d21d95b21e47cf2fd935CAS | 15757706PubMed |
Owens JS, Silburn DM, McKeon GM, Carroll C, Willcocks J, deVoil R (2003) Cover-runoff equations to improve simulation of runoff in pasture growth models. Australian Journal of Soil Research 41, 1467–1488.
| Cover-runoff equations to improve simulation of runoff in pasture growth models.Crossref | GoogleScholarGoogle Scholar |
Prosser IP, Rustomji P, Young WJ, Moran CJ, Hughes AO (2001) Constructing river basin sediment budgets for the National Land and Water Resources Audit. Technical Report 15/01, CSIRO Land and Water, Canberra, ACT.
Rattray DJ, Freebairn DM, McClymont D, Silburn DM, Owens J, Robinson B (2004) HowLeaky? The journey to demystifying ‘simple’ technology. In ‘Conserving soil and water for society: Sharing solutions. 13th International Soil Conservation Organisation Conference’. Brisbane, Queensland. Paper 422. (Eds SR Raine, AJW Biggs, NW Menzies, DM Freebairn, PE Tolmie) (ASSSI/IECA: Brisbane, Qld)
Rose CW (1985) Developments in soil erosion and deposition models. Advances in Soil Science 2, 1–63.
Rose CW, Williams JR, Sander GC, Barry DA (1983) A mathematical model of soil erosion and deposition processes. II. Application to data from an arid-zone catchment. Soil Science Society of America Journal 47, 996–1000.
| A mathematical model of soil erosion and deposition processes. II. Application to data from an arid-zone catchment.Crossref | GoogleScholarGoogle Scholar |
Roth CH, Prosser IP, Post DA, Gross JE, Webb MJ (2003) Reducing sediment export from the Burdekin catchment. CSIRO Land and Water, NAP3.224.
Scanlan JC, Pressland AJ, Myles DJ (1996) Run-off and soil movement on mid-slopes in north-east Queensland grazed woodlands. The Rangeland Journal 18, 33–46.
| Run-off and soil movement on mid-slopes in north-east Queensland grazed woodlands.Crossref | GoogleScholarGoogle Scholar |
Silburn DM (2011) Hillslope runoff and erosion on duplex soils in grazing lands in semi-arid central Queensland. III. USLE erodibility (K factors) and cover–soil loss relationships. Soil Research 49, 127–134.
Silburn DM, Carroll C, Ciesiolka CAA, deVoil RC, Burger P (2011) Hillslope runoff and erosion on duplex soils in grazing lands in semi-arid central Queensland. I. Influences of cover, slope, and soil. Soil Research 49, 105–117.
Silburn DM, Loch RJ (1992) Present capabilities and constraints in modelling soil erosion. In ‘Proceedings of the 5th Australian Soil Conservation Conference’. Vol. 3. Erosion/productivity and erosion prediction. Perth, 1990. (Eds GJ Hamilton, KM Howes, R Attwater) pp. 187–199. (Department of Agriculture: Perth, W. Aust.)
Silburn DM, Robinson JB, Freebairn DM (2007) Why restore marginal cropland to permanent pasture? Land resource and environmental issues. Tropical Grasslands 41, 139–153.
Smith GDS, Coughlan KJ, Yule DF, Laryea KB, Srivastava KL, Thomas NP, Cogle AL (1992) Soil management options to reduce runoff and erosion on a hardsetting Alfisol in the semi-arid tropics. Soil & Tillage Research 25, 195–215.
| Soil management options to reduce runoff and erosion on a hardsetting Alfisol in the semi-arid tropics.Crossref | GoogleScholarGoogle Scholar |
Stern H, de Hoedt G, Ernst J (2003) Objective classification of Australian climates. Commonwealth Bureau of Meteorology, Melbourne. Available at: www.bom.gov.au/climate/environ/other/koppen_explain.shtml (accessed Oct 2009).
Waters DK (2004) Grazing management implications on runoff and erosion processes in semi-arid Central Queensland. In ‘Conserving soil and water for society: Sharing solutions. 13th International Soil Conservation Organisation Conference’. Brisbane, Queensland. Paper 427. (Eds SR Raine, AJW Biggs, NW Menzies, DM Freebairn, PE Tolmie) (ASSSI/IECA: Brisbane, Qld)
Wischmeier WH, Smith DD (1978) ‘Predicting rainfall-erosion losses – a guide to conservation planning.’ United States Department of Agriculture, Handbook No. 537. (US Government Printing Office: Washington, DC)
