The Effects of Fire on Soil Water Repellency, Catchment Sediment Yields and Streamflow

Scott, D. F.; Wyk, D. B. Van

doi:10.1007/978-3-642-76174-4_12

Cited by 19 publications

(18 citation statements)

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“…Additionally, few studies are able to partition the bedload and suspended load components. The research by Scott and Van Wyk (1992) and Moody and Martin (2001a) are exceptions. Scott (1993) was able to report post-fire ratios, but not pre-fire.…”

Section: Introductionmentioning

confidence: 74%

“…Peak increases in hillslope sediment generation of one to three orders of magnitude are reported from varying environments and levels of fire severity (Johansen et al, 2001;Benavides-Solorio and MacDonald, 2001;Scott, 1993;Shakesby et al, 1993;Moody and Martin, 2001a;Morris and Moses, 1987). However, Prosser and Williams (1998) and Scott and Van Wyk (1992) observed increased runoff and sediment generation at the hillslope plot scale under natural rainfall, but no increase in catchment exports. Scott (1993) reported delivery ratios of 8%, 8%, 12% and 50% and Moody and Martin (2001a) 33%.…”

Section: Introductionmentioning

confidence: 83%

“…Shakesby and Doerr (2006) have identified the lack of pre-fire data sediment yield data as a key problem in placing post-fire erosion rates in a longer term context. Malmer (2004), Scott and Van Wyk (1992), Burgess et al (1981), Helvey (1980) and Brown (1972) were able to compare pre-and post-fire suspended sediment concentrations and loads when fires burnt experimental (Malmer, Burgess et al, Scott and van Wyk, Helvey) and routine (Brown) monitoring catchments. However, the sediment sampling regimes that Helvey (1980) and Brown (1972) were able to implement were not ideal for accurate load estimation, although valuable data on the magnitude of sediment loads was captured.…”

Section: Introductionmentioning

confidence: 95%

See 2 more Smart Citations

Changes in sediment loads and discharge from small mountain catchments following wildfire in south eastern Australia

Lane

Sheridan

Noske

2006

Journal of Hydrology

158

149

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Section: Introductionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

Changes in sediment loads and discharge from small mountain catchments following wildfire in south eastern Australia

Lane

Sheridan

Noske

2006

Journal of Hydrology

158

149

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“…This model estimates the reduction in streamflow (mm) in invaded areas relative to the natural vegetation based on the total above-ground biomass of the invading plants. The model was developed using data from long-term studies which compared the streamflow from natural fynbos shrubland catchments and catchments afforested with pines (Van Wyk, 1987;Scott and Van Wyk, 1992). The relationship is as follows:…”

Section: Calculation Of Water-usementioning

confidence: 99%

“…The risk of severe flooding is also increased by the increased surface runoff and higher peak flood water volumes (Scott et al, 1991). The effects of the changes in soil wettability and water infiltration can persist for many years (Scott and Van Wyk, 1992). The risks of damage to property and the loss of human lives or severe injuries are also greatly increased.…”

Section: Other Benefitsmentioning

confidence: 99%

Invasive alien trees and water resources in South Africa: case studies of the costs and benefits of management

Maitre¹,

Wilgen²,

Gelderblom³

et al. 2002

Forest Ecology and Management

239

136

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Invasive alien plants are consumptive water-users, and may have reduced river flows in South Africa by about 6.7% according to a broad-scale study. An effective programme to bring the invasions under control would cost about US$ 92 million per year for the next 20 years. This paper reports on studies of four representative catchments (the Sonderend, Keurbooms, Upper Wilge and Sabie-Sand) to assess the impacts and costs of invasions at a scale that is more relevant to managers. Several alien plant species have invaded the catchments. Non-riverine invasions are mainly Pinus and Hakea species in Sonderend and Keurbooms, eucalypts in the Upper Wilge, and pines and scramblers (e.g. Lantana camara) in the Sabie-Sand catchment. Riverine invasions are dominated by Acacia mearnsii and, to a lesser extent, A. dealbata, except in the Sabie-Sand and the lower Sonderend River where Eucalyptus species are important. About 44% of the Sonderend, 54% of the Keurbooms, 2% of the Upper Wilge and 23% of the Sabie-Sand catchments has been invaded to some degree. The corresponding reductions in the natural river flows attributed to these invasions are about 7.2, 22.1, 6.0 and 9.4%. If the invasions are not controlled they could potentially spread, and occupy 51, 77, 70%, respectively, of the first three catchments. At an annual expansion rate of 10-15% this would take about 13, 26 and 63 years, respectively. The invadable areas in the Sabie-Sand catchment are already invaded so invasions will only increase in density. It would take about 26-30 years to reach 100% canopy cover. The projected flow reductions for the four catchments would increase to 41.5, 95.5, 25.1 and 22.3%, respectively. The estimated cost of the control programmes to prevent these losses would be about US$ 13.2, 9.9, 4.1 and 6.6 million for the Sonderend, Keurbooms, Upper Wilge and Sabie-Sand catchments, respectively. Should the catchments be allowed to become fully invaded before control operations were started, then the costs would rise to US$ 86.5, 20.5, 278.0 and 11.1 million, respectively. The impacts and costs are significant and are comparable with those calculated independently for other South African catchments. Water is acknowledged to be a key constraint to economic growth in South Africa and there is considerable pressure for efficient and sustainable use of the limited water resources. The projected impacts would justify control programmes aimed at clearing alien invaders for water conservation. #

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Initial hydrologic and geomorphic response following a wildfire in the Colorado Front Range

Moody

Martin

2001

Earth Surf Processes Landf

392

387

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A wildfire in May 1996 burned 4690 hectares in two watersheds forested by ponderosa pine and Douglas fir in a steep, mountainous landscape with a summer, convective thunderstorm precipitation regime. The wildfire lowered the erosion threshold in the watersheds, and consequently amplified the subsequent erosional response to shorter time interval episodic rainfall and created both erosional and depositional features in a complex pattern throughout the watersheds.The initial response during the first four years was an increase in runoff and erosion rates followed by decreases toward pre-fire rates.

show abstract

The Effects of Fire on Soil Water Repellency, Catchment Sediment Yields and Streamflow

Cited by 19 publications

References 0 publications

Changes in sediment loads and discharge from small mountain catchments following wildfire in south eastern Australia

Changes in sediment loads and discharge from small mountain catchments following wildfire in south eastern Australia

Invasive alien trees and water resources in South Africa: case studies of the costs and benefits of management

Initial hydrologic and geomorphic response following a wildfire in the Colorado Front Range

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