The analysis of rainfall-induced slope failures at Iva Valley area of Enugu State, Nigeria

Igwe, Ogbonnaya; Mode, Wilfred A.; Nnebedum, Okechukwu Donald; Okonkwo, Ikenna Anthony; Oha, I. A.

doi:10.1007/s12665-013-2647-x

Cited by 73 publications

(31 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Igwe et al, 2014;Che et al 2012;Che et al, 2011;Claessens et al, 2007;Kitutu et al, 2009;Knapen et al, 2006;Davies, 1996;Davies et al, 2013;Ayonghe et al 1999;Ayonghe et al, 2004;Zogning et al, 2007;Mugagga et al, 2012b;Ngecu et al, 2004;Broothaerts et al, 2012;Van Den Eeckhaut et al, 2009) and our field experience suggest that LS are responsible for acute problems in Equatorial Africa. This is a region characterized by steep slopes, intense rainfalls, deep soil profiles and populations highly vulnerable to geohazards.…”

mentioning

confidence: 53%

“…These case study areas are representative of other regions of Equatorial Africa being affected by LS, such as the Western (DR.Congo, Rwanda, Burundi; Moeyersons et al, 2004;Moeyersons et al, 2010) and Eastern branches of the East African Rift system (Ethiopia, Broothaerts et al, 2012;Van Den Eeckhaut et al, 2009, Kenya, Tanzania;Ngecu et al, 2004;Davies, 1996;Temple and Rapp 1972) or Nigeria (Igwe et al, 2014). …”

Section: Study Areasmentioning

confidence: 99%

See 1 more Smart Citation

Landslide resilience in Equatorial Africa: Moving beyond problem identification!

Kervyn¹,

Jacobs²,

Maes³

et al. 2015

belgeo

View full text Add to dashboard Cite

mentioning

confidence: 53%

Section: Study Areasmentioning

confidence: 99%

Landslide resilience in Equatorial Africa: Moving beyond problem identification!

Kervyn¹,

Jacobs²,

Maes³

et al. 2015

belgeo

View full text Add to dashboard Cite

“…Fines, which are mostly composed of clays, have higher water retention capacity than sands and gravels (Bell, 2007). The permeability coefficients revealed that the soils are permeable (Igwe et al, 2013). Nevertheless, the order of permeability of the soils is: Oraukwu > Okija-Ozubulu > Nanka > Uli.…”

Section: Geotechnical Properties Of the Soilsmentioning

confidence: 94%

“…Previous researches from different regions of the world have shown that the mechanical interactions of surface and groundwater with landscapes could play significant roles in the development and expansion of gullies (Mahmood, Kim, Ashraf, & Ziaurrehman, 2016;Moges & Holden, 2008;Ownegh & Nohtani, 2004;Poesen, 2011;Rockwell, 2002;Scheidegger, 1973;Shellberg, Brooks, Sencer, & Ward, 2013;Sophocleous, 2002;Tebebu et al, 2010). Similarly, several researchers have reported the influences of geomorphology and hydrology on soil erodibility in different parts of the southeastern Nigeria (Egboka & Nwankwor, 1985;Egboka, Nwankwor, & Orajaka, 1990;Igwe, 2017;Igwe, Mode, Nnebedum, Okonkwo, & Oha, 2013;Nwajide, 1979Nwajide, , 1992Obi, Okogbue, & Nwajide, 2001;Ofomata, 1965Ofomata, , 1988Ogbukagu, 1979;Okoyeh et al, 2014). In some parts of Anambra State, Okoyeh et al (2014) assessed the influence of surface and subsurface water level dynamics in the development of gullies.…”

Section: Introductionmentioning

confidence: 98%

The impact of hydrogeomorphological characteristics on gullying processes in erosion-prone geological units in parts of southeast Nigeria

Egbueri

Igwe

2020

Geology, Ecology, and Landscapes

Self Cite

View full text Add to dashboard Cite

Hydrogeomorphic factors were suspected to contribute to the persistent gully erosion taking place in Nanka, Ogwashi and Benin formations underlying the southern Anambra State, Nigeria. Therefore, this study investigated the impact of hydrology and geomorphology on gully development and expansion in this area using integrated field survey, hydrological, geotechnical and geomorphological approaches. Field survey and hydrological results revealed that the study area is characterized by numerous surface water bodies and shallow groundwater systems. Both the surface waters and groundwater have a westward flow direction, from areas of high elevations on the Nanka Formation to areas of low elevations on the Ogwashi and Benin formations. Geotechnical results revealed that the soils are permeable, weak, easily dispersible and collapsible. Geomorphological analysis showed that the area is characterized by uneven badland topography, high gully slope gradients, concave slopes, poor land-use practices, and low vegetation cover. Generally, the results of this study indicated that hydrogeomorphology and soil engineering properties substantially influence the gullying processes in the area. However, areas underlain by the Nanka Formation have higher gullying intensity than in areas underlain by the Ogwashi and Benin formations due to variations in their hydrogeomorphological characteristics.

show abstract

“…Annual rainfall (based on 2012 precipitation amount) ranges between 1500 mm to 2100 mm (Igwe et al 2013). The areas lie between the tropical rainforests which dominate nearly half of southern Nigeria and is characterized by luxuriant vegetation and abundant plant species.…”

Section: Climatic Featuresmentioning

confidence: 99%

The geotechnical characteristics of landslides on the sedimentary and metamorphic terrains of South-East Nigeria, West Africa

Igwe

2015

GEOENVIRON DISASTERS

Self Cite

View full text Add to dashboard Cite

Background: Landslides in Nigeria occur in various forms and vary in mode, scale and frequency. The variations appear to be significantly controlled by geologic setting, hence the need to study in detail the distinctive features that differentiate landslides in sedimentary environments from those on metamorphic localities. The aim is to understand the actual features impacted on the landslides by geology, from which future predictions of occurrence and identification of instability could be based. The recognition of features that are characteristic of certain geologic setting may be a major step in early warning development in Nigeria. To achieve the objectives detailed mapping of the study area was carried out using topographic maps, aerial photographs and multiple field surveys.

show abstract

The analysis of rainfall-induced slope failures at Iva Valley area of Enugu State, Nigeria

Cited by 73 publications

References 48 publications

Landslide resilience in Equatorial Africa: Moving beyond problem identification!

Landslide resilience in Equatorial Africa: Moving beyond problem identification!

The impact of hydrogeomorphological characteristics on gullying processes in erosion-prone geological units in parts of southeast Nigeria

The geotechnical characteristics of landslides on the sedimentary and metamorphic terrains of South-East Nigeria, West Africa

Contact Info

Product

Resources

About