scholarly journals Numerical Canal Seepage Loss Evaluation for Different Lining and Crack Techniques in Arid and Semi-Arid Regions: A Case Study of the River Nile, Egypt

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3135
Author(s):  
Elsayed Elkamhawy ◽  
Martina Zelenakova ◽  
Ismail Abd-Elaty
Keyword(s):  
Water Resource Management ◽  
Concrete Lining ◽  
River Nile ◽  
Seepage Rate ◽  
Liner Material ◽  
Canal Seepage ◽  
Considerable Impact ◽  
Geomembrane Liners ◽  
Negative Impacts

Owing to the potential negative impacts of climatic changes and the grand Ethiopian renaissance dam, water scarcity has become an urgent issue. Therefore, the Egyptian Ministry of Water Resources and Irrigation has started a national project of the lining and rehabilitation of canals, to reduce seepage losses and for efficient water resource management. This study presents a new approach for assessing three different lining and crack techniques for the Ismailia canal, the largest end of the river Nile, Egypt. A 2-D steady state seep/w numerical model was developed for the Ismailia canal section, in the stretch at 28.00–49.00 km. The amount of seepage was significantly dependent on the hydraulic characteristics of the liner material. The extraction from aquifers via wells also had a considerable impact on the seepage rate from the unlined canals; however, a lesser effect was present in the case of lined canals. The concrete liner revealed the highest efficiency, followed by the geomembrane liner, and then the bentonite liner; with almost 99%, 96%, and 54%, respectively, without extraction, and decreasing by 4% for bentonite and geomembrane liners during extraction; however, the concrete lining efficiency did not change considerably. Nevertheless, the efficiency dramatically decreased to 25%, regardless of the lining technique, in the case of deterioration of the liner material. The double effect of both deterioration of the liner material and extraction from the aquifer showed a 16% efficiency, irrespective of the utilized lining technique.

scholarly journals System Dynamics-Multiple Objective Optimization Model for Water Resource Management: A Case Study in Jiaxing City, China

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 671
Author(s):  
Xiaoying Zhou ◽  
Feier Wang ◽  
Kuan Huang ◽  
Huichun Zhang ◽  
Jie Yu ◽  
...  
Keyword(s):  
Resource Management ◽  
System Dynamics ◽  
Water Resource ◽  
Water Allocation ◽  
Water Resource Management ◽  
Water Shortage ◽  
Multiple Objective ◽  
Multiple Objective Optimization ◽  
Model Framework

Predicting and allocating water resources have become important tasks in water resource management. System dynamics and optimal planning models are widely applied to solve individual problems, but are seldom combined in studies. In this work, we developed a framework involving a system dynamics-multiple objective optimization (SD-MOO) model, which integrated the functions of simulation, policy control, and water allocation, and applied it to a case study of water management in Jiaxing, China to demonstrate the modeling. The predicted results of the case study showed that water shortage would not occur at a high-inflow level during 2018–2035 but would appear at mid- and low-inflow levels in 2025 and 2022, respectively. After we made dynamic adjustments to water use efficiency, economic growth, population growth, and water resource utilization, the predicted water shortage rates decreased by approximately 69–70% at the mid- and low-inflow levels in 2025 and 2035 compared to the scenarios without any adjustment strategies. Water allocation schemes obtained from the “prediction + dynamic regulation + optimization” framework were competitive in terms of social, economic and environmental benefits and flexibly satisfied the water demands. The case study demonstrated that the SD-MOO model framework could be an effective tool in achieving sustainable water resource management.

Construction and operation of batching plants in difficult geological conditions of Upper Kama potash mines

2021 ◽  
pp. 51-56
Author(s):  
V. N. Aptukov ◽  
V. V. Tarasov ◽  
V. S. Pestrikova ◽  
O. V. Ivanov
Keyword(s):  
Crack Opening ◽  
Concrete Lining ◽  
Salt Deposit ◽  
Mine Shaft ◽  
Deformation And Fracture ◽  
Geological Conditions ◽  
Negative Impacts ◽  
Long Term Experience ◽  
Term Maintenance

Scenarios of the component arrangement of batching plants in the system of a vertical mine shaft are discussed. The features of operation of batching plants in vertical shafts of potash mines are identified. The actual recorded damages generated in the lining of batching plants in the course of their longterm operation in potash mines are described. The geomechanical researches aimed to determine vertical convergence in batching rooms of mine shafts, as well as for monitoring of crack opening and displacements in sidewalls in the batching chambers are presented. The major results of the full-scale geomechanical observations are reported, and the main causes of fractures in concrete and reinforced concrete lining at junctures of shafts and batching rooms and shaft bins are identified. The set of the engineering solutions implemented for the protection of lining in batching facilities during construction of mine shafts is described, and its efficiency is evaluated. The mathematical modeling is carried out to estimate various negative impacts on deformation and fracture of concrete lining in shafts with regard to the time factor. From the modeling results, the dominant cause of concrete lining damage in batching chambers and in mine shaft is found. Based on the accomplished research results and actual long-term experience of operation of mine shafts, the most favorable factors are determined for the best design choices in construction and long-term maintenance-free operation of batching plants in potash mines of the Upper Kama Potash–Magnesium Salt Deposit.

The Risk of Water Erosion on the Foothills of the Middle High Atlas (Morocco): Tagueleft Basin Case Study : خطر التعرية المائية على السفوح بالأطلس الكبير الأوسط (المغرب): دراسة حالة حوض تاكلفت

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Rizki Mohamed
Keyword(s):  
Land Degradation ◽  
Local Development ◽  
Remote Sensing Data ◽  
Potential Method ◽  
Water Erosion ◽  
High Atlas ◽  
Negative Impacts ◽  
The Impact

The Tagueleft basin is geographically located in the northern edges of the Middle High Atlas, which is a geomorphological fragile area. The impact of human activity has accelerated water erosion in this mountains area. This is reflected in dynamic and unstable foothills, a decrease in forests density and degradation in the production of the land. On the other hand, land degradation due to human overexploitation of natural resources has increased land degradation in the area. The interest in the risk of erosion on the foothills in the area under study comes in the context of our contribution to clarify the role of geomatical and geomorphological approaches in explaining and identifying the mechanisms responsible for current foothills dynamism through water erosion and its negative impacts on the environment and local development. The aim of the study was to use the EPM (Erosion Potential Méthod) which is formulated by Slobodan Gavrilovic for erosion in mountainous areas and to test the reliability of its results based on fieldwork and remote sensing data. The results of the erosion assessment and its quantification by applying the coefficient (W) for the theoretical model in the area under study have shown that erosion is very important and it touches on wide areas as it appears through the domain classification of the distribution erosion in Tagueleft basin.

scholarly journals Regulatory Challenges for the Use of Reclaimed Water in Mexico: A Case Study in Baja California

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1432 ◽  
Author(s):  
Christian Gilabert-Alarcón ◽  
Saúl Salgado-Méndez ◽  
Luis Daesslé ◽  
Leopoldo Mendoza-Espinosa ◽  
Mariana Villada-Canela
Keyword(s):  
Public Health ◽  
Water Resource Management ◽  
Baja California ◽  
Stakeholder Participation ◽  
Wastewater Reuse ◽  
Reclaimed Water ◽  
Integrated Approach ◽  
Management Regime ◽  
Study Results

In Mexico, water planning is based on the National Water Law, the core of which is Integrated Water Resources Management (IWRM). The municipality provides wastewater treatment and reuse, and an integrated approach is mandatory for these processes. However, a traditional (non-integrated) management regime has prevailed in water legislation, resulting in pollution and the inefficient use of water. The objectives of this research were to analyze the Mexican legal framework and international guidelines in the use of reclaimed water for agricultural irrigation and environmental discharges, and to evaluate challenges facing reclaimed water in the Maneadero Valley, Baja California, as a case study. Results show that wastewater reuse was implemented in the absence of integrative planning and assessment of the potential impacts on the environment and public health. In addition, gaps between decisions linked to the legal attributes of the relevant institutions were identified. Defined roles across the three levels of authority, transparent and congruent funding, coherent water-quality requirements and the strengthening of stakeholder participation are needed to adopt integrated water resource management for reclaimed water use. The alignment of common goals on public health, environmental protection and agricultural development between authorities and the different sectors is crucial to bridge these challenges.

Residents’ perceptions of film-induced tourism: A Portuguese case study

2016 ◽  
Vol 17 (4) ◽  
pp. 424-433 ◽  
Author(s):  
Raquel Mendes ◽  
Laurentina Vareiro ◽  
André Rafael Ferreira
Keyword(s):  
Tourism Development ◽  
Local Communities ◽  
Internet Survey ◽  
Soap Operas ◽  
Tourism Planning ◽  
Cultural Economic ◽  
Perceived Impacts ◽  
Negative Impacts ◽  
Popular Television

Film-induced tourism has various socio-cultural, economic and environmental impacts on local destinations. Considering that destination managers and tourism development authorities aim to plan for optimal tourism development, and at the same time wish to minimize the negative impacts of this development on the local communities, monitoring residents’ opinions of perceived impacts is a good way of incorporating their reaction into tourism planning and development. This study’s main objective is to explore residents’ perceptions of film-induced tourism and the impacts of filmmaking on the development of a destination. Specifically, the research examines residents’ perceptions of filmmaking impacts on two Portuguese municipalities (Arcos de Valdevez and Estremoz) given their features in two popular television soap operas. Data is collected by means of an Internet survey, in which residents’ perceptions of these impacts are solicited. Residents generally agree that the recording and exhibition of the television soap operas are important to the municipality, and contribute to the increased number of tourists. Given that residents consider that the positive impacts are more significant than the negative impacts, they would support the recording of other television series in their municipalities. Although perceptions of residents from Arcos de Valdevez and Estremoz were similar, some significant differences were found.

Local Stakeholders’ Perception as a Contribution to the Identification of Negative Impacts on Protected Areas: A Case Study of Torres del Paine National Park

2020 ◽  
pp. 215-242
Author(s):  
Macarena Fernández Génova ◽  
Germaynee Vela-Ruiz Figueroa ◽  
Fiorella Repetto-Giavelli ◽  
Juliana Torres Mendoza ◽  
Nicolás Recabarren Traub ◽  
...  
Keyword(s):  
Protected Areas ◽  
National Park ◽  
Local Stakeholders ◽  
Negative Impacts ◽  
Torres Del Paine

scholarly journals DETERMINATION OF ADOLESCENT WORLDVIEW: COMBATING NEGATIVE INFLUENCE OF SOCIAL MEDIA

2017 ◽  
Vol 2 (1) ◽  
pp. 6
Author(s):  
Rose Emmaria Tarigan
Keyword(s):  
Social Media ◽  
Positive Impact ◽  
Case Study Research ◽  
Negative Influence ◽  
Number Of Factors ◽  
Depth Interview ◽  
Negative Impacts ◽  
Use Of Social Media

Use of social media creates positive or negative impacts on adolescents. There are a number of factors enabling adolescents to make use of social media positively. One of the factors studied in this research is the adolescent worldview. The adolescent worldview greatly determines the way she behaves and her attitude towards social media. The result of this research shows that adolescent worldview may release and enables her to reject negative impacts of social media, particularly from modern cultural -isms as relativism, individualism, emotionalism, presentism (present-time ism), materialism, autonomy, victimism, and turn it into a positive impact on herself. Worldviews may be differentiated based on three categories namely religion, spirituality and secularity. This research is conducted by explorative-qualitative approach, using case study research method. Data collection was conducted by in-depth interview with late adolescents.

scholarly journals Environmental health indicator for the evaluation of neighborhoods in urban areas: a case study in Caruaru (PE), Brazil

2020 ◽  
Vol 56 (1) ◽  
pp. 166-179
Author(s):  
Armando Dias Duarte ◽  
Saulo de Tarso Marques Bezerra ◽  
Elizabeth Amaral Pastich Gonçalves
Keyword(s):  
Environmental Management ◽  
Environmental Health ◽  
Urban Areas ◽  
Public Policies ◽  
Environmental Indicators ◽  
Economic Policies ◽  
Health Indicator ◽  
Public Managers ◽  
Negative Impacts

The environment, over the years, has been subjected to strong negative impacts caused by economic policies that have promoted an uncontrolled growth of urbanization in the cities and abusive exploration of the natural resources. In this context, developing socio-environmental indicators to subsidize the formulation of municipal public policies which consider, specifically, the environmental (in)salubrity of each neighborhood or locality of municipalities is imperative. The present paper presents the construction and application of an environmental health indicator for residential neighborhoods in two localities of Caruaru City, Pernambuco State. The data adopted in research were obtained from databases of City Hall institutions, from interviews with the population of the localities and water quality analyses. The results indicated that the neighborhoods analyzed presented characteristics of medium health; water supply, the disposal of solid waste, and socioeconomic aspects require attention and priority of public policies. In conclusion, the proposed indicator can be an instrument to assist in urban planning and environmental management of Brazilian municipalities, because it can guide the performance of public managers and the civil society to identify priority actions for improving the infrastructure of the most unhealthy neighborhoods. Keywords: healthiness; environmental health; environmental sanitation; environmental management; environmental health indicator.

Sign in / Sign up

Export Citation Format

Share Document