Ex-post evaluation of erosion control measures in southern Mali

Bodnar, F.; Spaan, W.P.; Hulshof, J.

doi:10.1016/j.still.2006.10.007

Cited by 10 publications

(7 citation statements)

References 10 publications

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“…Agricultural land use is one of the most important factors th at have shaped h istor ic landscapes in Europe (Bakker et al, 2005;Bickik et al, 2001;Jordan et al, 2005;Sun et al, 2003;Szilassi et al, 2006). Bodnar et al (2006) in a study entitled ex-post evaluation of erosion control in southern Mali, compared the erosion situation in a rural area. Fanetti and Vezzoli (2007) were calculated sediment input using different magnitude equations for the Alpine watershed and the erosion potential method (EPM) in geographical information system (GIS) environment.…”

Section: Introductionmentioning

confidence: 99%

Investigation of land use changes on soil erosion process using geographical information system

Solaimani

Modallaldoust

Lotfi

2009

Int. J. Environ. Sci. Technol.

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Land use change quantified for the last 50 years within and near a fast growing agricultural land in Neka River Basin, using geographic information systems. Land cover and land use change was projected for the next decade using topography, geology, land use maps and remote sensing data of the study area. The study explored the relationships between agricultural land growth and landscape changes. The land use changes assessed among the different land cover classes. It is important to mention that conducting of the present study a very severe land cover changes taken place as the result of agricultural land development. These changes in land cover led to the forest degradation of the study area. Relationship between land-use changes and agricultural growth offered a more robust prediction of soil erosion in Neka watershed. This study aims to find the relationships between land use pattern, erosion and the sediment yield in the study area. The land use coefficient has applied in the model of erosion potential method to forecast the effect of the land type to reduce the erosion. The results of this study indicated that the total sediment yield of the study area has notably decreased to 89.24 % after an appropriate land use/cover alteration. The estimated special erosion for the southern Neka Basin is about 144465.1 m 3 /km 2 where after management policy is predicted 15542.9 m 3 /km 2 /y. Therefore, the total difference for the study area has estimated about 128922.2 m 3 /km 2 /y.

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Section: Introductionmentioning

confidence: 99%

Investigation of land use changes on soil erosion process using geographical information system

Solaimani

Modallaldoust

Lotfi

2009

Int. J. Environ. Sci. Technol.

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“…Bodnár et al (2007) showed a spectacular 87% decrease of gully volume in cultivated fields in Mali (Africa). Comparing a baseline situation in 1988 to the situation in 2003, the estimated annual soil loss decreased 77% after the adoption of erosion control measures.…”

Section: Sediment Traps Sediment Controlmentioning

confidence: 99%

“…Soil conservation practices are routinely used in crop areas in order to reduce erosion intensity and they have been adapted to construction sites. Bodnár et al (2007) showed a spectacular 87 per cent decrease of gully volume in cultivated fields in Mali (Africa). Comparing a baseline situation in 1988 to the situation in 2003, the estimated annual soil loss decreased 77 per cent after the adoption of erosion control measures.…”

Section: Identifying Mitigation Measuresmentioning

confidence: 99%

Improving effectiveness of mitigation measures in EIA follow-up

Gallardo

Cavalhieri

Campos

et al. 2015

Management of Environmental Quality: An International Journal

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Purpose – The purpose of this paper is to investigate the effectiveness of mitigation measures adopted in a scheme of EIA follow-up by examining their performance in reducing geo-environmental impacts in earthwork activities during the Rodoanel southern section construction in São Paulo, Brazil. This environment is fragile in terms of affected watersheds because the highway crosses two important reservoirs that supply most of the metropolitan water demand. Therefore, this research also aims at promoting water quality control. Design/methodology/approach – This study combines complementary sources as evidences in the literature and field checks, tests and monitoring. The methodology was supported by criteria for evaluating the effectiveness of mitigation measures in the case study approach. Findings – The EIA follow-up activities contributed to the maintenance of environmental conditions in the majority of the control points at the end of the construction phase. Water quality parameters were not statistically different before and during the construction of the highway. The choice and arrangement of mitigation measures were successful in ensuring water quality control by avoiding siltation. Practical implications – A robust scheme for designing and evaluating mitigation measures contributes to the improvement of their effectiveness and is pivotal to the success of the EIA follow-up. Originality/value – This case study serves as an example for extending EIA follow-up practice in special to the improvement of the design and evaluation of mitigation measures in similar contexts.

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“…Winds transported the eroded soils (dust) and deposited them elsewhere forming new layers of topsoil up to a decimetre thick. Substantial water run-off and soil erosion usually occur on these soils when surface run-off is high [11], and this erosion is often observed in areas with compacted soils having low water infiltration capacity. Thus, run-off and wind contribute to soil degradation through erosion of the upper layers which ultimately reduce water availability for crops and trees of the parkland [12].…”

mentioning

confidence: 99%

“…The commonly applied field level technologies include live fencing and grass strips [11], compost with mineral fertilizers [19,20], zaï or pit planting with organic amendments [21,22], stone and contour bunding [23,24], halfmoon techniques [21,25] and gully interventions [11]. However, these methods were piecemeal efforts that did not evolve into precise and efficient soil degradation control measures as they are labour-intensive and, with the increasing annual levels of degradation, only translated into marginal yield increase that is not sustainable [26].…”

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confidence: 99%

Shallow wells, the untapped resource with a potential to improve agriculture and food security in southern Mali

Zemadim

Tabo

2016

Agric & Food Secur

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Background: Excessive rainwater during the rainy season and lack of water in the dry season have been challenging the agricultural productivity and food security for rural communities in southern Mali. Various soil and water conservation practices were implemented in the past to improve crop yields and income, and reverse the effect of land degradation. However, none of these efforts looked into the potential use of shallow wells at a spatial scale to improve the agricultural productivity and hence the food security in the region. Results:In total 484 shallow wells were geo-referenced, mapped and studied in two districts, Bougouni and Koutiala, in southern Mali to understand the dynamics of groundwater recharge and relationship with rainfall in different seasons. The study found out that shallow wells were mainly utilized for household and livestock water consumption and not for agricultural water use. Well construction history followed the trend of the severe drought that hit the Sahel in the years of the 1970s and 1980s. Majority of wells (87 % in Bougouni and 84 % in Koutiala) were constructed after the drought period with significant variation of construction in the two districts (p value 0.032). Well depths ranged from 1 to 150 m, with the majority of wells (64 %) within the depth range of 6.5-14.5 m (p value 0.043). During the dry season water was available in the majority of wells (73 %) at a depth range from 5.5 to 15.5 m (p value 0.996). In the rainy season on average 84 % of wells in Bougouni and 94 % of wells in Koutiala experience water level rise within the range of 0.5-10.5 m (p value 0.423/Bougouni and 0.991/Koutiala). In few of the studied villages shallow wells were found to be fast recharging, thus enabling farmers to buffer the negative effects of drought conditions. Conclusion:Shallow wells are important sources of water in rural Mali. The wells have adequate recharging capacity during the rainy season and insignificant water level variation during the dry season. Though accessing water from shallow wells was labour-intensive and mostly done by women and the youth, water is available within an average depth ranging from 5.5 to 15.5 m from most studied wells. The issue of water scarcity in different seasons was thus attributed to accessibility due to the lack of appropriate water lifting mechanisms. Groundwater was an untapped resource in Mali, and we suggest groundwater management needs to be given consideration along with other management practices in the changing climate condition to improve the agricultural productivity and food security.

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Ex-post evaluation of erosion control measures in southern Mali

Cited by 10 publications

References 10 publications

Investigation of land use changes on soil erosion process using geographical information system

Investigation of land use changes on soil erosion process using geographical information system

Improving effectiveness of mitigation measures in EIA follow-up

Shallow wells, the untapped resource with a potential to improve agriculture and food security in southern Mali

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