A LCC Analysis of Rainwater Management Variants

Abstract

Abstract:The paper presents results of the Life Cycle Cost (LCC) analysis carried out for several variants of rainfall water management in a newly designed multi-family dwelling house. According to the LCC methodology, calculations were performed for the whole undertaking life cycle with both investment outlays and operation/maintenance costs taken into account. The LCC analysis was carried out, in particular, for a variant assuming that the rainwater collected from the roof will be entirely discharged to the sewage system. On the other hand, the second variant provided for replacement of traditional building roof with a green one. Facilities of that type, thanks to their retention properties, may delay runoff of rainwater and reduce the overall quantity of water discharged from roof surface and therefore can be classified as Sustainable Urban Drainage Systems. In the third case considered, rainwater is to be utilised in the building. It was assumed that precipitation water will be stored in a tank and used in the sanitary water supply system for flushing toilets, thus reducing the overall tap water purchase costs.

The analysis of the possibility of using 10-minute rainfall series to determine the maximum rainfall amount with 5 minutes duration

“…In this case RRMSE = 3.0%, 3.0%, 2.9% and 3.3% for h calculated by (6)(7)(8)(9) and RRMSE = 44.3%, 30.9%, 47.3% and 37.6% for h calculated by (12)(13)(14)(15). Deviations from the measurements at the level of several dozen percents disqualify analyzed method of determining precipitation amounts with the duration of 5 minutes.…”

“…The most commonly required at the entrance to hydrodynamic models are storm and heavy rainfall hyetographs with 5 minutes time resolution. The maximum precipitation models (in the form of IDF or DDF curves) are the grounds for the creation of a model precipitation to use in hydrodynamic models [1][2][3][4][5][6][7][8].…”

Life cycle costs analysis of infiltration boxes

“…Zjawiska te mogą zostać zaobserwowane zarówno na odwadnianym terenie, jak i w odbiorniku ścieków, dla- Całkowite koszty ponoszone na budowę, eksploatację oraz konserwację systemów odwodnieniowych mogą zostać wyznaczone przy pomocy narzędzia, jakim jest analiza Life Cycle Cost (LCC). W dziedzinie zarządzania wodami opadowymi metodologia LCC znajduje obecnie zastosowanie głównie w procesie projektowania systemów gospodarczego wykorzystania wód deszczowych [8,20]. Znaleźć można też przykłady jej zastosowania do oceny kosztów cyklu życia dachów zielonych [9,15].…”

“…W dziedzinie zarządzania wodami opadowymi metodologia LCC znajduje obecnie zastosowanie głównie w procesie projektowania systemów gospodarczego wykorzystania wód deszczowych [8,20]. Znaleźć można też przykłady jej zastosowania do oceny kosztów cyklu życia dachów zielonych [9,15].…”

Rainwater harvesting and greywater recycling as alternative water resources: a survey of public opinion

“…In recent years there has been an increase in the ecological awareness of the public, which has resulted in more and more buildings with a reduced demand for water and energy [13][14][15][16][17].…”