Evaluation of methods for reducing the total cost in rural water pumping stations in Iran: a case study

2016 ◽  
Vol 65 (3) ◽  
pp. 277-293 ◽  
Author(s):  
Saeid Mohammadzade Negharchi ◽  
Rouzbeh Shafaghat ◽  
Ahmadreza Najafi ◽  
Delavar Babazade
Keyword(s):  
Total Cost ◽  
Water Pumping ◽  
Pumping Stations ◽  
Rural Water ◽  
Evaluation Of Methods

A Multipurpose Optimization Model for Area-Wide Sewerage Systems

1989 ◽  
Vol 21 (8) ◽  
pp. 1015-1026
Author(s):  
A Koizumi ◽  
T Inakazu
Keyword(s):  
Environmental Impact ◽  
User Satisfaction ◽  
Programming Model ◽  
Objective Functions ◽  
Total Cost ◽  
Good Balance ◽  
Sewerage System ◽  
Pumping Stations ◽  
Goal Programming Model

In this paper the goal programming model is given that deals with the optimal scale and location of an area-wide sewerage system, consisting of trunk sewers, treatment plants, and pumping stations. The uncertainty of future wastewater volume is considered, and the regional objectives are evaluated. Hence, the model is composed of several constraints and of three objective functions (goals). The major constraints are the capacity of the treatment plants and the estimated range of wastewater amount in each municipality. The goals are to minimize total cost and environmental impact, while maximizing user satisfaction with the sewerage system. The case study shows that this model can help to decide the location and scale of facilities for sewerage system, giving results that are a good balance of the three goals. Furthermore, the analysis, by varying the settings of the goals or the values of sewerage propagation ratio, shows that the model can simulate changes in the wastewater capacity and its transport routes. Thus our model makes it easier for decisionmakers to plan area-wide sewerage systems.

scholarly journals The Problem of Carbon Dioxide Emissions from Closed Coal Mine Shafts – The Overview and the Case Study

2016 ◽  
Vol 61 (3) ◽  
pp. 587-600
Author(s):  
Paweł Wrona ◽  
Józef Sułkowski ◽  
Zenon Różański ◽  
Grzegorz Pach
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Carbon Dioxide Emission ◽  
Mining Area ◽  
Emission Point ◽  
Water Pumping ◽  
Gas Hazard ◽  
Flow Through ◽  
Reporting Procedures

Abstract Greenhouse gas emissions are a common problem noticed in every mining area just after mine closures. However, there could be a significant local gas hazard for people with continuous (but variable) emission of these gases into the atmosphere. In the Upper Silesia area, there are 24 shafts left for water pumping purposes and gases can flow through them hydraulically. One of them – Gliwice II shaft – was selected for inspection. Carbon dioxide emission with no methane was detected here. Changes in emission and concentration of carbon dioxide around the shaft was the aim of research carried out. It was stated that a selected shaft can create two kinds of gas problems. The first relates to CO2 emission into the atmosphere. Possible emission of that gas during one minute was estimated at 5,11 kg CO2/min. The second problem refers to the local hazard at the surface. The emission was detected within a radius of 8m from the emission point at the level 1m above the ground. These kinds of matters should be subject to regular gas monitoring and reporting procedures.

Comprehensive Management of Rural Water Pollution in Polder Wetland: a Case Study of the Chenhai Wei Polder Wetland in the Taihu Basin of China

Wetlands ◽  
2021 ◽  
Vol 41 (2) ◽  
Author(s):  
Lubing Yan ◽  
Changkun Xie ◽  
Anze Liang ◽  
Ruiyuan Jiang ◽  
Shengquan Che
Keyword(s):  
Water Pollution ◽  
Comprehensive Management ◽  
Taihu Basin ◽  
Rural Water

scholarly journals Dynamic lot sizing problem under uncertainty of returned products in remanufacturing industry

2018 ◽  
Vol 204 ◽  
pp. 07005
Author(s):  
Iman Setyoaji
Keyword(s):  
Bayesian Inference ◽  
Lot Sizing ◽  
Replacement Ratio ◽  
Total Cost ◽  
Lot Sizing Problem ◽  
Holding Cost ◽  
Dynamic Lot Sizing ◽  
Lot Sizes

Remanufacturing processes face uncertainty in the quality of the items being returned by customers, this significant variability complicates the control of inventories. Demands can be satisfied by procured new items, but also by remanufactured returned items. This paper develops dynamic lot sizing model for remanufacturing industry under uncertainty of returned items and proposes Bayesian Inference to estimate the replacement ratio of returned items that used to determine those lot sizes for new items. The objective of this paper is to minimize the total cost composed of holding cost and set-ups cost. A numerical example is provided based on case study. The result shows that total cost is reduced to be 45%.

scholarly journals Farmers’ participation in Water User Association in western Iran

2017 ◽  
Vol 35 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Saeed Gholamrezai ◽  
Fatemeh Sepahvand
Keyword(s):  
Water Resources ◽  
Water Consumption ◽  
User Association ◽  
Factors Affecting ◽  
Water User ◽  
Water User Association ◽  
Agriculture Sector ◽  
Water Pumping ◽  
Pumping Stations ◽  
Agriculture Water

AbstractOne of the main challenges of water scarcity is the water consumption in the agriculture sector. Therefore, optimizing water consumption and applying an optimal management in the agriculture sector is necessary. The implementation of a participatory management of water resources in the rural areas and the creation of Water User Association (WUA) can be a successful approach towards this management. That requires the continuity of the management, the comprehensive participation of farmers, and the exploitation of water resources; however, this action needs to understand the factors affecting the behavior of consumers. Thus identifying the factors influencing farmers’ intentions towards participation in WUA is essential. The purpose of this study is to identify factors affecting farmers' intentions towards participation in water user association, by theory of planned behavior (TPB). There are 21 agriculture water pumping stations active in Lorestan Province. Farmers at each agriculture water pumping stations make up a Water User Association. The population of this study consisted of all WUAs in western Iran (N = 1990), and through a proportional stratified random sampling technique farmers were selected (N = 133) from the population. Moreover, the validity of the questionnaire was confirmed by a panel of experts. The reliability of the questionnaire was calculated at pre-test stage for different parts of the questionnaire ranging from 0.83 until 0.91. The collected data were analyzed using Statistical Package for the Social Sciences 20 software. The results revealed that there were effective variables including subjective norm, attitude, and extension training courses which contributed to the importance of participation in the water management, and that the educational level of farmer was a controlled variable that could affect farmers' attitudes towards participating in Water User Association; these factors could explain 53% of farmers' participation totally.

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