The economic effect of green roofs on non-point pollutant sources management using the replacement cost approach

2016 ◽  
Vol 20 (7) ◽  
pp. 3031-3044 ◽  
Author(s):  
Younghun Jung ◽  
Kyudong Yeo ◽  
Jeseung Oh ◽  
SeungOh Lee ◽  
Jeryang Park ◽  
...  
Author(s):  
Poovadol Sirirangsi ◽  
Adjo Amekudzi ◽  
Pannapa Herabat

The replacement-cost approach and the book-value method as decision support tools for selecting maintenance alternatives under budget constraints and for capturing the effects of maintenance practices on highway asset value are investigated. By using a case study based on the Thailand Pavement Management System, the replacement-cost approach and the book-value method are applied to analyze maintenance alternatives for selected highways. The versatility of these asset-valuation methods is explored for capturing trade-offs in the type and timing of maintenance and for incorporating the added value of effective maintenance practices and the impact of deferred maintenance in the overall asset value. The study demonstrated that the replacement-cost approach is a more versatile tool for considering the maintenance-related value of highways in maintenance decision making, whereas the book value may be a simpler financial accounting tool. The two approaches may be used together to clarify how maintenance expenditures are being translated into facility replacement value or how the overall value of the infrastructure is being preserved. The study results are potentially useful to agencies interested in capturing the added value of effective maintenance practices in the overall value of their asset base.


Author(s):  
Т. Сувалова ◽  
Tatyana Suvalova

The aim of the study is to analyze the effectiveness of the implementation of internal social programs of organizations. The planning of social events is aimed at increasing the loyalty of employees to the organization, the growth of labor productivity, social activity, creativity, and rationalization of activities. The article discusses the goals, scope, focus and results of social programs, examines approaches to methods for assessing their effectiveness, offers an assessment of their economic efficiency using a set of quantitative and qualitative indicators. An assessment is made of the economic indicators of the effectiveness of social programs in terms of investments in the past (historical cost), present (replacement cost) and future periods (economic value). Analyzed indicators for assessing the effectiveness of the organization’s social programs in key areas. The main positive factors that directly affect the cumulative economic effect are formulated. The factors of socio-psychological well-being and activating factors of employees’ work are investigated.


2006 ◽  
Vol 53 (2) ◽  
pp. 147-153 ◽  
Author(s):  
Y.W. Feng ◽  
E. Shiratani ◽  
I. Yoshinaga ◽  
T. Hitomi

We estimated the reduction in nitrogen outflow load from a paddy field that had a recycling irrigation facility and, by using a replacement cost method, evaluated the economic effect of nitrogen removal by the paddy field during the irrigation period in the Yoshinuma region of Tsukuba City, Japan. The recycling ratio of outflow water (proportion of outflow reused) was 13.5%. The nitrogen (N) outflow load was reduced by about 45 kg ha−1 by the N removal function of the paddy field and by about 39 kg ha−1 by the recycling irrigation facility. The paddy field equipped with a recycling irrigation facility as an N removal facility was valued at 32.6 million Japanese yen (JPY) ha−1 and 0.72 million JPY ha−1 per year, which compare it with the construction and maintenance costs, respectively, of a water quality improvement facility. The recycling irrigation facility was costed at 17.3 million JPY ha−1 for construction and 0.21 million JPY ha−1 for maintenance per year. The cost for constructing and maintaining a recycling irrigation facility was 53% of the value of the paddy field area equipped with a recycling irrigation facility as an N removal facility.


2021 ◽  
pp. 127166
Author(s):  
Eva Horváthová ◽  
Tomas Badura ◽  
Helena Duchková

2015 ◽  
Vol 41 (2) ◽  
pp. 150-161 ◽  
Author(s):  
Pilsung Kang ◽  
Youngjung Geum ◽  
Hyun-Woo Park ◽  
Sang-Gook Kim ◽  
Tae-Eung Sung ◽  
...  

2021 ◽  
Vol 13 (4) ◽  
pp. 2403
Author(s):  
Agnieszka Bus ◽  
Anna Szelągowska

Green roofs (GRs) have been one of the most popular solutions for water harvesting in urban areas. Apart from their water retention role and increasing biodiversity, they constitute the missing link between the built and the natural environment, which is required for sustainable human living in cities. This paper aims to calculate the ecological (EE) and economic effect (EcE) of water harvesting via GRs, by contrasting with a traditional roof, and to perform an economic analysis of the social cost benefits that GRs generate during their life cycle, using the Net Present Value (NPV) method. All the calculations and analyses were conducted for both intensive and extensive GRs in 11 of the largest municipalities in Poland, with a population of >250,000 inhabitants. According to the results of this study, water retention and the economic and ecological effects of GRs are highest in the municipalities with the highest assumed number of GRs (Warsaw, Krakow, Wroclaw, and Szczecin). The average EE and EcE equals 507,000 m3/yr and 621,000 USD/yr. The NPV results show that the effectiveness of investments in intensive GRs is, to a certain extent, more significant than in extensive GRs and the average equals 60.77 and 4.47 USD/yr for intensive and extensive GRs, respectively. The results could serve as a reference for the evaluation and optimization of the energy efficiency of rainwater harvesting schemes, in European cities.


2009 ◽  
Vol 42 (4) ◽  
pp. 343-353 ◽  
Author(s):  
Kyu-Dong Yeo ◽  
Choong-Sung Yi ◽  
Gil-Ho Kim ◽  
Myung-Pil Shim

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