Gully Erosion in Southeastern Nigeria: Role of Soil Properties and Environmental Factors

Igwe, C. A.

doi:10.5772/51020

Cited by 46 publications

(49 citation statements)

References 15 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can be linked to recurrent flood problem experienced in the study area (Nwabineli, 2013). The excessive runoff generated during rainstorms has led to severe erosion problem in the area as it rapidly accelerates the development of gullies from incipient interrill and rill channels (Igwe 2012). Efforts to curtail gully erosion by controlling the amount of HOF getting to the channels through roofwater harvesting has been adopted in the past with considerably success when properly managed (Hudec et al 2005).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

GIS-Based Sub-Basin Scale Identification of Dominant Runoff Processes for Soil and Water Management in Anambra Area of Nigeria

Fagbohun¹,

Olabode²,

Adebola³

et al. 2017

Contemporary Trends in Geoscience

View full text Add to dashboard Cite

Identifying landscapes having comparable hydrological characteristics is valuable for the determination of dominant runoff process (DRP) and prediction of flood. Several approaches used for DRP-mapping vary in relation to data and time requirement. Manual approaches which are based on field investigation and expert knowledge are time demanding and difficult to implement at regional scale. Automatic GIS-based approach on the other hand require simplification of data but is easier to implement and it is applicable on a regional scale.In this study, GIS-based automated approach was used to identify the DRPs in Anambra area. The result showed that Hortonian overland flow (HOF) has the highest coverage of 1508.3 km 2 (33.5%) followed by deep percolation (DP) with coverage of 1455.3 km 2 (32.3%). Subsurface flow (SSF) is the third dominant runoff process covering 920.6 km 2 (20.4%) while saturated overland flow (SOF) covers the least area of 618.4 km 2 (13.7%) of the study area. The result reveal that considerable amount of precipitated water would be infiltrated into the subsurface through deep percolation process contributing to groundwater recharge in the study area. However, it is envisaged that HOF and SOF will continue to increase due to the continuous expansion of builtup area. With the expected increase in HOF and SOF, and the change in rainfall pattern associated with perpetual problem of climate change, it is paramount that groundwater conservation practices should be considered to ensure continued sustainable utilization of groundwater in the study area.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The geology of the area has significant influence on topography and development of runoff and erosion. Highlands underlain by considerably stable lithology which resist development of gullies support the development of powerful runoff which rapidly moves downward to destroy low-lying areas (Ofomata 1981;Igwe 2012).…”

Section: Study Areamentioning

confidence: 99%

GIS-Based Sub-Basin Scale Identification of Dominant Runoff Processes for Soil and Water Management in Anambra Area of Nigeria

Fagbohun¹,

Olabode²,

Adebola³

et al. 2017

Contemporary Trends in Geoscience

View full text Add to dashboard Cite

show abstract

“…The government and other donor agencies have been trying to implement these recommendations from their meager resources (Nwajide and Hoque 1979;Okagbue and Uma 1987;Egboka et al 1990;Igbokwe et al 2008). Until now, no realistic solution has been found to the problem (Igbokwe et al 2008;Ezezika and Adetona 2011;Okoro et al 2011;Igwe 2012). Studies so far conducted on the causes and impacts of the gully erosion in the area have basically been revolving around geological and geotechnical investigation techniques (Nwajide and Hoque 1979;Egboka and Okpoko 1984;Okagbue and Uma 1987;Egboka et al 1990; Igbokwe et al 2008;Igwe 2012).…”

Section: Introductionmentioning

confidence: 94%

An Assessment of the Influences of Surface and Subsurface Water Level Dynamics in the Development of Gullies in Anambra State, Southeastern Nigeria

et al. 2014

View full text Add to dashboard Cite

Gully erosion-induced problems have been challenging the people and government of Anambra State in southeastern Nigeria for a long time. In spite of the numerous geoscientific and engineering studies so far conducted in the area, the underlying causes of these problems still remain poorly understood. In an attempt to contribute to the understanding of the underlying processes responsible for the persistent gully erosion problems in Anambra State, an integrated study utilizing hydrological, geomorphological, and geophysical data was undertaken. Results of the analyses show that bulk density, pH, and organic matter content of the soil range from 1610 to 1740 kg m 23 , 5.10 to 5.30, and 0.32% to 0.46%, respectively. Particle size analyses results show that the soils are dominated by coarse sand materials (50%-68%). Variations in the Atterberg limit parameters (liquid limit, plastic limit, and plasticity index) also point to the dominance of coarse materials in the shallow subsurface. Vertical electrical sounding results capture the shallow surface as being dominated by resistive sandy materials that are underlain by lowly resistive clayey materials. Thus, the area is dominated by porous, friable, and poorly cemented coarse materials that are located on a long and steeply sloping terrain of the tectonically elevated Awka-Orlu cuesta. Both overland and subsurface flow processes are responsible for the gully erosion problems confronting the area. Human activities (e.g., deforestation, uncontrolled urbanization, and absence of requisite legislation to protect the environment) and the high elevation of the Awka-Orlu cuesta have aggravated the severity of the problems. An aggressive reforestation program particularly with native trees, promulgation of necessary legislation to protect the environment, and setting up and empowering an enforcement agency should be vigorously pursued. Also, necessary enlightenment campaigns on best agricultural practices that can reduce surface runoff in soil and water conservation may also be helpful in changing the mindset of people.

show abstract

“…The geology of the area has an influence on runoff and erosion process with the highlands with considerable stable lithology resisting development of gullies but provide aggressive runoff which move download to devastate lowland areas. (Ofomata, 1981;Igwe, 2012).…”

Section: Study Areamentioning

confidence: 99%

Identifying Dominant Runoff Processes at a Regional Scale – A GIS - Based Approach

Joseph¹,

Franklin²,

Olufemi³

2017

Present Environment and Sustainable Development

View full text Add to dashboard Cite

Abstract:Identifying landscapes with similar hydrological characteristics is useful for the determination of dominant runoff process (DRP) and flood prediction. Several approaches used for DRP-mapping differ in respect to time and data requirement. Manual approaches based on field investigation and expert knowledge are time consuming and difficult to implement at regional scale. Automatic GIS-based approach on the other hand require simplification of data but are easier to implement and it is applicable on regional scale.

show abstract

Gully Erosion in Southeastern Nigeria: Role of Soil Properties and Environmental Factors

Cited by 46 publications

References 15 publications

GIS-Based Sub-Basin Scale Identification of Dominant Runoff Processes for Soil and Water Management in Anambra Area of Nigeria

GIS-Based Sub-Basin Scale Identification of Dominant Runoff Processes for Soil and Water Management in Anambra Area of Nigeria

An Assessment of the Influences of Surface and Subsurface Water Level Dynamics in the Development of Gullies in Anambra State, Southeastern Nigeria

Identifying Dominant Runoff Processes at a Regional Scale – A GIS - Based Approach

Contact Info

Product

Resources

About