scholarly journals The Reuse of Sediments Dredged from Artificial Reservoirs for Beach Nourishment: Technical and Economic Feasibility

2020 ◽  
Vol 12 (17) ◽  
pp. 6820 ◽  
Author(s):  
Massimo Bagarani ◽  
Annamaria De Vincenzo ◽  
Corrado Ievoli ◽  
Bruno Molino
Keyword(s):  
Beach Nourishment ◽  
Economic Feasibility ◽  
Environmental Cost ◽  
Economies Of Scope ◽  
Economic Sustainability ◽  
Artificial Reservoir ◽  
Intermediate Products ◽  
Evaluation Approach ◽  
Joint Product ◽  
Artificial Reservoirs

Sedimentation has significant impacts on the useful capacity of an artificial reservoir, a resource to preserve. Interventions of dredging are therefore often unavoidable, even because decommissioning of dams is often impossible in many contexts and entails high costs. Dredging generates an undesired accumulation of materials that represent an environmental cost, but that could be used as intermediate products in other processes, such as beach nourishment. The study develops a method for the evaluation of the feasibility of an investment aimed at coastal nourishment with sediments dredged from artificial reservoirs. The method considers the set of technical conditions that make such use possible. The presence of economies of scope, with environmental diseconomies utilized as joint product, modifies the evaluation approach. The results of the approach show a possible environmental and economic sustainability of the proposed investment even in the presence of highly unfavorable scenarios. The study applies the feasibility appraisal to the case of the Guardialfiera reservoir in Molise, Italy.

scholarly journals Solar Integrated Anaerobic Digester: Energy Savings and Economics

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4292
Author(s):  
Lidia Lombardi ◽  
Barbara Mendecka ◽  
Simone Fabrizi
Keyword(s):  
Anaerobic Digestion ◽  
Natural Gas ◽  
Economic Analysis ◽  
Thermal Energy ◽  
Economic Feasibility ◽  
Solar Thermal ◽  
Base Case ◽  
Economic Sustainability ◽  
Solar Thermal Energy ◽  
Solar Integration

Industrial anaerobic digestion requires low temperature thermal energy to heat the feedstock and maintain temperature conditions inside the reactor. In some cases, the thermal requirements are satisfied by burning part of the produced biogas in devoted boilers. However, part of the biogas can be saved by integrating thermal solar energy into the anaerobic digestion plant. We study the possibility of integrating solar thermal energy in biowaste mesophilic/thermophilic anaerobic digestion, with the aim of reducing the amount of biogas burnt for internal heating and increasing the amount of biogas, further upgraded to biomethane and injected into the natural gas grid. With respect to previously available studies that evaluated the possibility of integrating solar thermal energy in anaerobic digestion, we introduce the topic of economic sustainability by performing a preliminary and simplified economic analysis of the solar system, based only on the additional costs/revenues. The case of Italian economic incentives for biomethane injection into the natural gas grid—that are particularly favourable—is considered as reference case. The amount of saved biogas/biomethane, on an annual basis, is about 4–55% of the heat required by the gas boiler in the base case, without solar integration, depending on the different considered variables (mesophilic/thermophilic, solar field area, storage time, latitude, type of collector). Results of the economic analysis show that the economic sustainability can be reached only for some of the analysed conditions, using the less expensive collector, even if its efficiency allows lower biomethane savings. Future reduction of solar collector costs might improve the economic feasibility. However, when the payback time is calculated, excluding the Italian incentives and considering selling the biomethane at the natural gas price, its value is always higher than 10 years. Therefore, incentives mechanism is of great importance to support the economic sustainability of solar integration in biowaste anaerobic digestion producing biomethane.

scholarly journals Multi-objective optimization model for planning metro-based underground logistics system network: Nanjing case study

2021 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
Xiliang Sun ◽  
Wanjie Hu ◽  
Xiaolong Xue ◽  
Jianjun Dong
Keyword(s):  
Programming Model ◽  
Freight Transport ◽  
Optimization Techniques ◽  
Economic Feasibility ◽  
Environmental Cost ◽  
Mixed Integer ◽  
Logistics System ◽  
Transit System ◽  
Multi Objective ◽  
Good Ability

<p style='text-indent:20px;'>Utilizing rail transit system for collaborative passenger-and-freight transport is a sustainable option to conquer urban congestion. This study proposes effective modeling and optimization techniques for planning a city-wide metro-based underground logistics system (M-ULS) network. Firstly, a novel metro prototype integrating retrofitted underground stations and newly-built capsule pipelines is designed to support automated inbound delivery from urban logistics gateways to in-city destinations. Based on four indicators (i.e. unity of freight flows, regional accessibility, environmental cost-saving, and order priority), an entropy-based fuzzy TOPSIS evaluation model is proposed to select appropriate origin-destination flows for underground freight transport. Then, a mixed integer programming model, with a well-matched solution framework combining multi-objective PSO algorithm and A* algorithm, are developed to optimize the location-allocation-routing (LAR) decisions of M-ULS network. Finally, real-world simulation based on Nanjing metro case is conducted for validation. The best facility configurations and flow assignments of the three-tier M-ULS network are reported in details. Results confirm that the proposed algorithm has good ability in providing high-quality Pareto-optimal LAR decisions. Moreover, the Nanjing M-ULS project shows strong economic feasibility while bringing millions of Yuan of annual external benefit to the society and environment.</p>

scholarly journals USE OF INFORMATION MANAGEMENT AND TELECOMMUNICATION TECHNOLOGIES FOR IMPROVING ECONOMIC SUSTAINABILITY OF PRODUCTION ENTERPRISE OF ENERGY SECTOR

2018 ◽  
pp. 122-126
Author(s):  
M. V. Galitsyn ◽  
S. V. Tureev
Keyword(s):  
Information Management ◽  
Communication Systems ◽  
Continuous Process ◽  
Energy Sector ◽  
Economic Feasibility ◽  
Economic Sustainability ◽  
Manufacturing Enterprise ◽  
Effective Efficiency ◽  
The Subject ◽  
And Control

The paper considers the improving economic sustainability of a manufacturing enterprise in the energy sector using modern information management and telecommunications systems. The subject of the study are certain types of economic sustainability of an enterprise in the energy sector. The purpose of the work is to consider the efficiency and economic feasibility of using information and control systems in the context of a continuous process of their development and renewal. The study of increasing the economic sustainability of a manufacturing enterprise in the energy sector through the use of information management and communication systems is carried out by induction and generalization. It shows the challenges faced by the energy sector enterprise in the application of information management and telecommunication technologies and systems, as well as the rationality of their application through the acquisition of effective efficiency in achieving the goal of increasing the economic sustainability of the energy sector enterprise. Consideration of certain types of economic sustainability of the industrial enterprise of the energy sector allows to conclude that the use of information management and communication systems in conjunction with organizational measures and management mechanisms that take into account the specifics of the enterprise is economically feasible.

scholarly journals SOME ASPECTS OF CADASTRAL WORKS METHODOLOGY IN RELATION TO LAND FLOODED QUARRIES

2019 ◽  
Vol 6 (2) ◽  
pp. 169-174
Author(s):  
Yulia Shumskaya ◽  
Lyudmila Trubina
Keyword(s):  
Remote Sensing ◽  
Initial Data ◽  
Unmanned Aerial Vehicles ◽  
Ecological Situation ◽  
Artificial Reservoir ◽  
Aerial Vehicles ◽  
Economic Use ◽  
Artificial Reservoirs

The article considers the issue of cadastral account of water-filled quarries. The concept of an artificial reservoir is characterized. The role of artificial reservoirs in the formation of the ecological situation of the territory is noted. The main directions of economic use of dry and water-filled quarries after recultivation are characterized.The necessity of cadastral account of water-filled quarries is stated. The methodology of collecting and processing initial data for registering water-filled quarries is presented and illustrated. The role of materials of remote sensing and unmanned aerial vehicles in cadastral accountof water-filled quarries is noted.

scholarly journals Analysis of Water Reservoirs and Ponds Resources in the Lviv Region

2019 ◽  
Keyword(s):  
Water Resources ◽  
Water Content ◽  
River Basin ◽  
Water Surface ◽  
Economic Importance ◽  
Water Reservoirs ◽  
Artificial Reservoir ◽  
Proper Functioning ◽  
Great Economic Importance ◽  
Artificial Reservoirs

Purpose. The validity of geographic studies of reservoirs and ponds which there are a subsystem of water resources in the region, is substantiated. Methods. Methodology and methods of natural geographical and hydro-geographical researches are used. Results. There is no clear difference between the reservoir and the pond. It is conditionally assumed that an artificial reservoir with a volume of up to 1 million m3 is a pond, and with larger volume is a reservoir. In the Lviv region there are 20 reservoirs (in Ukraine there are 968 reservoirs). Within the river basin of the Dniester there is 55%, the Western Bug - 25% and Xian 20% of all reservoirs in Lviv region. In the low ground administrative districts, the largest reservoirs are located in Horodok and Yavorivsky Region - five. According to the number of ponds, Lviv region takes the fourth place in Ukraine. The region has in general 3085 ponds. The largest amount of ponds is located in the Dniester basin - 54%, 23% and 16%, respectively, in the basins of the Western Bug and Xian. The smallest amount (7%) of the ponds is located in the Styr's basin. According to the low ground administrative districts, the highest number of ponds is in Yavoriv - 353 and Horodok and Drohobych region, 217 and 216 respectively. In general, an average of 0.56 hectares (in neighboring regions of 0.12-0.20 hectares) of the water surface of artificial reservoirs is in km2 of Lviv Oblast. As we see, Lviv region is two to three times the neighboring regions over this indicator. Of the total volume of reservoirs and ponds per person in the oblast, there are 71.8 m3 of water per year. Conclusions. These reservoirs - reservoirs and ponds, are of great economic importance, and also are important for water content of the territory. In order to maintain the proper functioning of reservoirs and ponds, their comprehensive, in particular, geographic research is extremely necessary.

The Measurement of Performance in Probabilistic Diagnosis IV. Utility Considerations in Therapeutics and Prognostics

1981 ◽  
Vol 20 (02) ◽  
pp. 80-96 ◽  
Author(s):  
J. D. F. Habbema ◽  
J. Hilden
Keyword(s):  
Decision Theory ◽  
Figure Of Merit ◽  
Acute Abdominal Pain ◽  
Theory Approach ◽  
Expected Loss ◽  
Patient Benefit ◽  
Evaluation Approach ◽  
Average Loss ◽  
Actual Decision ◽  
Probabilistic Diagnosis

It is argued that it is preferable to evaluate probabilistic diagnosis systems in terms of utility (patient benefit) or loss (negative benefit). We have adopted the provisional strategy of scoring performance as if the system were the actual decision-maker (not just an aid to him) and argue that a rational figure of merit is given by the average loss which patients would incur by having the system decide on treatment, the treatment being selected according to the minimum expected loss principle of decision theory.A similar approach is taken to the problem of evaluating probabilistic prognoses, but the fundamental differences between treatment selection skill and prognostic skill and their implications for the assessment of such skills are stressed. The necessary elements of decision theory are explained by means of simple examples mainly taken from the acute abdomen, and the proposed evaluation tools are applied to Acute Abdominal Pain data analysed in our previous papers by other (not decision-theoretic) means. The main difficulty of the decision theory approach, viz. that of obtaining good medical utility values upon which the analysis can be based, receives due attention, and the evaluation approach is extended to cover more realistic situations in which utility or loss values vary from patient to patient.

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