Implications of groundwater quality to corrosion problem and urban planning in Mekelle area, Northern Ethiopia

Berhane, Gebremedhin; Abera, Tesfahunegn; Gebre-Selassie, Solomon

doi:10.4314/mejs.v5i1.85331

Cited by 2 publications

(4 citation statements)

References 12 publications

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“…For Mekelle area different researchers [42, 54,55] have studied the engineering properties of soils and rocks with more focus to civil engineering applications. As part of our study, the engineering properties of soils and rocks in Mekelle area were characterized using in-situ and laboratory investigation methods with due attention to their applications for surface and subsurface fluid flow, design of sanitation and drainage systems, and waste management.…”

Section: Engineering Properties Of Soils and Rocksmentioning

confidence: 99%

“…Over abstraction and water quality deteriorations are common in many urban areas [73]. Except for limited analysis of groundwater quality [35][36][37]41,45,54,74], there is paucity of data for other water sources in Mekelle. In this study, a total of 51 samples were collected from a variety of sources, namely open hand-dug wells (10), boreholes (10), springs (8), seepage/runoff (6), stream/river channels (12), and faecal sludge (5).…”

Section: Analysis and Assessment Of Water Quality And Faecal Sludge C...mentioning

confidence: 99%

“…The major rocks and soils in Mekelle and its surrounding areas include [41,42,45,54,55,74,[86][87][88][89]: Adigrat sandstone, Antalo limestone, Agulae shale, dolerites and unconsolidated deposits…”

Section: Hydrogeology Of the Study Areamentioning

confidence: 99%

“…The alluvial soils on the other hand have moderate permeability values. The data from previous studies [41,54,55] are…”

Section: Soil Property Rsh (N=13) Rls (N= 11) Rdo (N= 6) Al (N= 6)mentioning

confidence: 99%

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Barriers to, and opportunities for off-grid sanitation provision in the rapidly urbanizing city of Mekelle, Ethiopia: Reimagining human waste as “brown gold” for environmental management and livelihood improvement

Woldearegay¹,

Ebdon²,

Silva³

et al. 2023

Preprint

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Inappropriate or poorly constructed sanitation is becoming one of the major challenges confronting rapidly urbanizing cities in the global south such as Ethiopia. This study was carried out to understand the sanitation and solid waste management challenges present in the city of Mekelle, in order to identify opportunities for sustainable faecal and solid waste management. This involved conducting: (a) a review of previous studies, (b) field and laboratory investigations (water and faecal sludge quality), (c) assessments of the status of existing sanitation services, (d) analysis of hydrogeological connectivity between septic tanks and surface & ground waters, (e) participatory assessments of solid waste management issues, and (f) identification of good practice in terms of sustainable waste management. Our findings revealed that the water supply coverage in 2021 only reached 67.3% of the population with water mainly from treated groundwater wells and surface water (dam); with some communities using untreated water from other sources. Though 65.8% of the households were found to have access to toilet facilities, sanitation remains a major challenge due to multiple inter-related factors: (i) open defecation, (ii) dumping of liquid and solid waste into surface waters, and (iii) lack of maintenance of the municipal faecal sludge treatment facilities. Our study highlighted contamination pathways likely to be impacting shallow wells, streams/rivers and springs in the city. In order to reduce water consumption and promote sustainable circular waste management the following emerging practices should be supported and up-scaled: urban agriculture, green space development, waste separation at source, organic waste reuse, and support for small businesses involved in waste management. If the full benefits of sustainable waste management are to be recognized in Mekelle, then appropriate policies, strategies, and regulatory frameworks need to be developed and implemented, along with governmental support for capacity building and local innovation.

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Section: Engineering Properties Of Soils and Rocksmentioning

confidence: 99%

Section: Analysis and Assessment Of Water Quality And Faecal Sludge C...mentioning

confidence: 99%

Section: Hydrogeology Of the Study Areamentioning

confidence: 99%

“…The alluvial soils on the other hand have moderate permeability values. The data from previous studies [41,54,55] are…”

Section: Soil Property Rsh (N=13) Rls (N= 11) Rdo (N= 6) Al (N= 6)mentioning

confidence: 99%

See 2 more Smart Citations

Barriers to, and opportunities for off-grid sanitation provision in the rapidly urbanizing city of Mekelle, Ethiopia: Reimagining human waste as “brown gold” for environmental management and livelihood improvement

Woldearegay¹,

Ebdon²,

Silva³

et al. 2023

Preprint

View full text Add to dashboard Cite

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Geoelectrical and Geotechnical Investigations of Subsurface Corrosivity in Ondo State Industrial Layout, Akure, Southwestern Nigeria

Adeyemo

Olumilola

Ibitomi³

2018

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Fifty two vertical electrical sounding (VES) data and six subsurface soil samples were collected at Ondo State Industrial Layout, Akure, south-western Nigeria in order to determine the subsurface corrosivity. The VES results delineated 3 to 5 geoelectric layers across the area, which correspond to topsoil, weathered layer, weathered basement, weathered/fractured basement and the presumed fresh bedrock. The layer resistivity values range from 22 to 602 ohm-m, 7 to 2468 ohm-m, 17 to 436 ohm-m, 25 to 39 ohm-m and 203 to 10023 ohm-m in the topsoil, weathered layer, weathered basement, weathered/fractured basement and the presumed fresh bedrock respectively. The iso-resistivity maps at depth slices of 1 and 2 m show that the northeastern, southeastern and the upper central part of the area are non-corrosive (above 350 ohm-m) to slightly corrosive (250 - 350 ohm-m), while the lower central, northwestern and southwestern parts of the area are moderately (150 - 250 ohm-m) to strongly corrosive (60 - 150 ohm-m). Soil sample analysis shows liquid limit results that vary from 37.6 to 59.7, while the plasticity limit results vary from 29.3 to 42.5 and all the plasticity index plots were below the A line indicating presence of non-plastic clay. The natural moisture content values vary from 21.4 to 35.5 %. The 2 m depth slice isoresistivity map and clay plasticity factor were synthesized using additive model to generate subsurface CR-index corrosivity model map which indicates that the northwestern, north-eastern and southern parts of the area are moderately (0.4 - 0.6) to strongly corrosive (0.6 - 0.8), while the upper central area and the flanks are slightly corrosive. The moderately and strongly corrosive zones correspond to the low elevation and water logged zones of the study area. The corrosivity model map was validated by the pH and corrosivity data. Keywords: Geotechnical, Liquid Limit, Plastic Limit, Plasticity Index, Clay Plasticity

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Implications of groundwater quality to corrosion problem and urban planning in Mekelle area, Northern Ethiopia

Cited by 2 publications

References 12 publications

Barriers to, and opportunities for off-grid sanitation provision in the rapidly urbanizing city of Mekelle, Ethiopia: Reimagining human waste as “brown gold” for environmental management and livelihood improvement

Barriers to, and opportunities for off-grid sanitation provision in the rapidly urbanizing city of Mekelle, Ethiopia: Reimagining human waste as “brown gold” for environmental management and livelihood improvement

Geoelectrical and Geotechnical Investigations of Subsurface Corrosivity in Ondo State Industrial Layout, Akure, Southwestern Nigeria

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