Rainfall Erosivity over Rhodesia

Stocking, Michael; Elwell, H.A.

doi:10.2307/621986

Cited by 66 publications

(33 citation statements)

References 5 publications

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“…Developing cropping systems that ensure continuous vegetal cover is an important management principle (Wilkinson, 1975b;Elwell & Stocking, 1976;Aina et al, 1977;Moore et al, 1979;Norén & Nordén, 1983). It is generally agreed that biological methods of erosion control are more effective and economic than engineering techniques of land forming (Roose & Lelong, 1976;Collinet & Valentin, 1979).…”

Section: Cultural Practices and Cropping Systemsmentioning

confidence: 99%

Soil erosion and sediment transport research in tropical Africa

Lal

1985

Hydrological Sciences Journal

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This paper reviews the magnitude of soil erosion in tropical Africa and relates it to erodibility, erosivity and landform in different ecological regions There are few direct measurements of erosivity and erodibility in tropical Africa and the relevance of using the Universal Soil Loss Equation in estimating these parameters is reviewed. Soil erodibility is not a fixed parameter and changes with time. Although localized rates of soil erosion can be high, the erosion rates derived from sediment loads in rivers are often low. Most of the available data on sediment loads of African rivers are 10-20 years old, and little research information is available on the delivery ratios associated with different catchments. Rapidly changing land use is one of the major factors responsible for accelerated soil erosion, and the effects of deforestation, grazing, fire, and of cultural practices are discussed. The economics of soil erosion is reviewed in terms of loss in productivity and siltation of reservoirs. Research and development needs are listed.

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Section: Cultural Practices and Cropping Systemsmentioning

confidence: 99%

Soil erosion and sediment transport research in tropical Africa

Lal

1985

Hydrological Sciences Journal

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“…From the adapted definition of Stocking and Elwell (1976), the data series from the six automatic rainfall gauges over the five year period contained 444 erosive rainfall events. To investigate the intra-storm distribution of the most extreme rainfall, the highest twenty kinetic energy events were identified at each station (n=120) and analysed further following the approach used by Nel (2007).…”

Section: Resultsmentioning

confidence: 99%

“…Wischmeier and Smith (1958) indicate that for significant amounts of soil erosion to occur rainfall intensities larger than 25 mm/h are needed. Stocking and Elwell (1976) classify a distinct erosive rainfall event as a storm when total rainfall exceeds 12.5 mm, maximum 5-minute intensity exceeds 25 mm/h and the event is isolated by at least a two-hour period of no rain. This definition has been used in previous studies (Nel, 2007;Nel and Sumner, 2007;Nel et al, 2012) to determine an erosive event.…”

Section: Study Sites and Methodsmentioning

confidence: 99%

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Intra-event characteristics of extreme erosive rainfall on Mauritius

et al. 2016

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Mauritius is a typical tropical volcanic island with a raised interior where extreme rainfall events generate the bulk of the erosivity. Intra-event characteristics of the 120 highest erosive events at six selected locations between 2004 and 2008 were analysed to provide the first detailed intra-storm data for a tropical island environment. On Mauritius, spatial variation is evident in the characteristics of the extreme erosive rainfall recorded at the stations, with a noticeable increase in rainfall depth, duration, kinetic energy and erosivity of extreme events with altitude. Extreme events in the raised interior (central plateau) show a high variability in peak intensity over time as well as a higher percentage of events with the greatest intensities in the latter part of the event. Intra-event distribution of rainfall in the interior of the island shows that rainfall has a higher potential to exceed infiltration rates as well as the ability to generate high peak runoff rates and substantial soil loss. The study suggests that even though the within-event rainfall characteristics is complex it has implications for soil erosion risk, and that in tropical island environments the within-storm distribution of rainfall must be incorporated in soil loss modelling.

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“…Various papers have been published on the topic of erosion risk applying different methodologies, based on several parameters, such as morphometric variables (Jozefaciuk and Jozefaciuk, 1993;Gournelos et al, 2004), rainfall erosion indexes (Stocking and Elwell, 1976;Chávez, 2006) or mathematically based erosion risk self-organising maps (Bartkowiak et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

<i>Brief communication</i> "Does climatic change in precipitation drive erosion in Naxos Island, Greece?"

Nastos

Evelpidou

Vassilopoulos

2010

Nat. Hazards Earth Syst. Sci.

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Abstract. In this paper we examined whether the recorded precipitation changes cause erosion in Naxos Island, Greece using precipitation indices derived from daily precipitation totals, during the period 1955-2007, in order to develop an erosion risk model. Although the mean annual precipitation appear to be low (∼360.0 mm), the erosion processes of the area are very intense, because of the intensive character of precipitation, the high slope relief, the differential lithology and the absence of important land cover The results of the analysis showed that the climatic changes in precipitation and the changes in land cover and land use are the main drivers for the erosion. This is why the 2nd (1971-1985) and 3rd (1986-2007) studied sub-periods may be called of high erosion risk, and especially the second one mainly because of the increased frequency of extreme precipitation events.

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Rainfall Erosivity over Rhodesia

Cited by 66 publications

References 5 publications

Soil erosion and sediment transport research in tropical Africa

Soil erosion and sediment transport research in tropical Africa

Intra-event characteristics of extreme erosive rainfall on Mauritius

<i>Brief communication</i> "Does climatic change in precipitation drive erosion in Naxos Island, Greece?"

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Rainfall Erosivity over Rhodesia

Cited by 66 publications

References 5 publications

Soil erosion and sediment transport research in tropical Africa

Soil erosion and sediment transport research in tropical Africa

Intra-event characteristics of extreme erosive rainfall on Mauritius

&lt;i&gt;Brief communication&lt;/i&gt; &quot;Does climatic change in precipitation drive erosion in Naxos Island, Greece?&quot;

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<i>Brief communication</i> "Does climatic change in precipitation drive erosion in Naxos Island, Greece?"