Zeitschrift für Bau- und Umweltingenieurwesen

This thesis focused on performance evaluation of water supply distribution system: case study Gudo Bahir, Bahir Dar, Ethiopia. The main objective of this study is to check the hydraulic performance of Gudo Bahir water distribution system by assessing losses of water, hydraulic performance of water distribution modeling and water supply and demand gap. Hydraulic network of the study area is simulated using Bentley Water GEMS V8i by using the data on the water distribution network of the area and master plan map of the town. The hydraulic simulation in the existing network system to satisfy the reliability of hydraulic parameters such as the pressure at a junction, head loss at each pipe material and flow of water were modeled. The water demand and supply of Gudo Bahir were not balanced. The daily water consumption of the area was 41 l/c/day used daily for different domestic activities with the billed water amount 1,619,591 m³/year was produced and 1, 087,704 m³/year was consumed and around 32.67% water was considered to be non-revenue (NRW). The level of connection in the study area was found 72.7%. The other observed big problem in Gudo Bahir area were intermittent water supply, pipe leakage, and one borehole creates a problem with the water distribution system line because it is directly joins the water distribution line without any disinfectants.

The 2.82 MW Pakpattan Hydropower Project (PHP) lies on Pakpattan Canal, achieved commercial operation on December 2016. Construction of the power plant began in May 28, 2012 and was completed at a cost of US $10.64 million in December 30, 2016. It is capable of generating enough electricity to power approximately 35,000 homes in Punjab Province and will offset more than 2500t of greenhouse gases annually. The hydroelectric facility successfully completed the 72-hour testing period required to achieve the Commercial Operation Date (COD). This paper highlights details of testing required to achieve commercial operation of the project.

Maintenance has evolved and now plays a vital part in all types of industrial businesses, with an endless number of functions. Numerous sorts of multi-criteria challenges exist in industries or machines, which require a multi-criteria decision-making procedure to be addressed. Each form of maintenance method has its advantages, disadvantages, and benefits. The performance of a machine will be affected by the maintenance tactics utilized to keep it running. These machines needed to be well maintained because a malfunction could result in production losses. Due to issues such as safety, cost, productivity, and customer satisfaction, the maintenance approach utilized on each machine may differ from one to the next. AHP approach is used in this paper to model maintenance strategy and pick possible priorities of maintenance plan utilizing expert decision-making. After safety (38.2%), value added (20%), implementation cost (13.2%), performance measurement (5%), implementation capability (8.2%), support system integration (11.5%) and stock and material management (3.9%) are the next greatest priority considerations on implementation. AALRT system corrective maintenance is the least of our concerns as a result of this. For AALRT's introduction, Total Productive Maintenance (TPM) is advocated. AHP is a multi-criteria decision-making approach for selecting a maintenance plan, which is superior to the traditional experience-based method.