Engineering geological characterization for evaluation of seepage and geomechanical properties of Chalchal Dam Site, Bale Zone, Southeastern Ethiopia

2021 ◽  
Vol 14 (23) ◽  
Author(s):  
Tola Garo ◽  
Matebie Meten
Keyword(s):  
Geomechanical Properties ◽  
Dam Site ◽  
Bale Zone

scholarly journals Torrential Flood Water Management: Rainwater Harvesting through Relation Based Dam Suitability Analysis and Quantification of Erosion Potential

2021 ◽  
Vol 10 (1) ◽  
pp. 27
Author(s):  
Bilal Ahmad Munir ◽  
Sajid Rashid Ahmad ◽  
Raja Rehan
Keyword(s):  
Sediment Yield ◽  
Soil Loss ◽  
Rainwater Harvesting ◽  
Suitability Analysis ◽  
Valley Bottom ◽  
The North ◽  
Roughness Index ◽  
Dam Site ◽  
Very High

In this study, a relation-based dam suitability analysis (RDSA) technique is developed to identify the most suitable sites for dams. The methodology focused on a group of the most important parameters/indicators (stream order, terrain roughness index, slope, multiresolution valley bottom flatness index, closed depression, valley depth, and downslope gradient difference) and their relation to the dam wall and reservoir suitability. Quantitative assessment results in an elevation-area-capacity (EAC) curve substantiating the capacity determination of selected sites. The methodology also incorporates the estimation of soil erosion (SE) using the Revised Universal Soil Loss Equation (RUSLE) model and sediment yield at the selected dam sites. The RDSA technique identifies two suitable dam sites (A and B) with a maximum collective capacity of approximately 1202 million m3. The RDSA technique was validated with the existing dam, Gomal-Zam, in the north of Sanghar catchment, where RDSA classified the Gomal-Zam Dam in a very high suitability class. The SE estimates show an average of 75 t-ha−1y−1 of soil loss occurs in the study area. The result shows approximately 298,073 and 318,000 tons of annual average sediment yield (SY) will feed the dam A and B respectively. The SE-based sediment yield substantiates the approximate life of Dam-A and Dam-B to be 87 and 90 years, respectively. The approach is dynamic and can be applied for any other location globally for dam site selection and SE estimation.

scholarly journals Knowledge, attitude, and utilization of drugs toward COVID-19 pandemic among Bale Zone residents, Southeast Ethiopia

2021 ◽  
Vol 9 ◽  
pp. 205031212110343
Author(s):  
Ayele Mamo ◽  
Mesud M Hassen ◽  
Ahmednur Adem ◽  
Zinash Teferu ◽  
Musa Kumbi ◽  
...  
Keyword(s):  
Drug Use ◽  
Severe Acute Respiratory Syndrome ◽  
Good Practice ◽  
Binary Logistic Regression ◽  
Sampling Technique ◽  
Cross Sectional Study ◽  
Health Problems ◽  
P Value ◽  
Cross Sectional ◽  
Bale Zone

Background: Coronavirus disease is a highly transmittable and pathogenic viral infection caused by severe acute respiratory syndrome coronavirus 2, which poses therapeutic dilemmas. Some suggestions for drug treatment seem problematic. Beliefs about the causes of health problems are determinants of treatment seeking decisions. Hence, one of the alternatives for the solution of health problems is employing traditional medicine to prevent coronavirus disease 19. Objective: To assess the knowledge, attitude, and utilization of drugs toward the coronavirus disease 19 pandemic among Bale zone residents. Methods: Community-based cross-sectional study was conducted among the Bale Zone population from May 30 to June 30, 2020. Eight hundred fifty-four participants were selected using a single population formula, and a multistage sampling technique was employed. Data were analyzed using SPSS version 25.0. Descriptive and binary logistic regression was used to analyze the outcomes. A p value ⩽ 0.05 was considered statistically significant. Results: Out of the total 854 respondents, about 534 (62.5%) got information about coronavirus disease 19 from TV/radio. More than two-thirds (71.9%) of the respondents have known that severe acute respiratory syndrome coronavirus 2 has no curative drugs, and 65.4% had a more appropriate attitude toward overall drug use in coronavirus disease 19. Level of education and, attitude towards drug use were singnificantly associated with knowledge of drugs, source of information about coronavirus disease 19 and having good practice were significantly associated with atittude toward drug utilization. Conclusion: One out of two study participants have good knowledge regarding drugs to the coronavirus disease 19 pandemic. Illiterate people in the community were identified to have poor knowledge about drugs, hence community educuation program is important to improve the knowledge about drugs towards the coronavirus disease 19 pandemic.

scholarly journals Sub-Level Stoping in an Underground Limestone Quarry: An Analysis of the State of Stress in an Evolutionary Scenario

2016 ◽  
Vol 61 (1) ◽  
pp. 199-216 ◽  
Author(s):  
Marilena Cardu ◽  
Sergio Dipietromaria ◽  
Pierpaolo Oreste
Keyword(s):  
Numerical Models ◽  
The State ◽  
In Situ Tests ◽  
Future Scenario ◽  
Limestone Quarry ◽  
Geomechanical Properties ◽  
State Of Stress ◽  
Upper Level ◽  
Pillar Structure

Abstract The aim of this study was to evaluate the state of stress of a „voids-pillar“ structure excavated by means of the sub-level stoping method in an underground limestone quarry near Bergamo (Italy). Both the current structure of the quarry (i.e. the rooms exploited till now) and a possible future scenario were analysed using the (FDM) FLAC 2D code. The quarry has been in operation since 1927; at present, exploitation is carried out underground via the sub-level stoping method. Exploitation involves two levels, with 5 rooms on the upper level and 9 rooms on the lower level. After analysing data obtained from laboratory and in situ tests carried out on rock samples and natural discontinuities, the geomechanical properties of the medium, knowledge of which is essential in order to establish the parameters that must be included in the numerical model, were evaluated. The implementation of three numerical models made it possible to study both the present conditions of quarry exploitation and the evolution of the exploited rooms, as well as a possible expansion involving a third level of rooms. Using the results obtained regarding the stress-strain present in the pillars, a potential change in room geometry was proposed aimed at reducing the stress state inside the pillars, decreasing plasticity and increasing overall quarry safety.

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