Abstract
The subject of the publication is the presentation of a methodology for determining the degree of diversification of water resources in collective water supply systems (= CWSS). Knowing the number of subsystems for water supply and their share of total water production, it is possible to calculate the dimensionless Pielou index. Similarly, the diversification indicators for networked water tanks (number and volume) and pressure pipelines of the second degree pumping station (number and flowability) can be determined. The work presents the calculation of diversification indices for selected CWSS in Poland. The presented methodology gives the possibility of three-parameter evaluation of settlement units with different water demand and different technical structure.
Highlights
Known in economics portfolio diversification one of the most effective methods of reducing investment risk
The degree of diversification of water supply in the Collective water supply system (CWSS) is greatly affected by: - number of the water supply subsystems (WSS), network tanks, collective discharge pipelines of the second stage pumping stations, evenness of distribution of WSS productivity, volume of network tanks, specific flowability of collective discharge pipelines of the second stage pumping stations, - share of the volume of accumulated water in the size of its collection from the water supply system
It is a desirable situation when during the failure of one of the CWSS elements the recipient of water does not feel any inconvenience related to the operation of the water supply network
Summary
Known in economics portfolio diversification one of the most effective methods of reducing investment risk. Analysis and evaluation of both CWSS reliability and security operation indicate the significant role of water resources diversification. Each agglomeration for the proper functioning requires good quality water supply in necessary amount [7]. It is important in crisis or emergency situations. An important role is played by the collective pressure pipelines of the second degree pumping station, whose number and diameter directly affect the reliability of water supply [10,11,12,13,14,15]. The operator of the CWSS having a high degree of diversification has greater room for manoeuvre in case of crisis, and his decisions do not have to be taken under pressure of time
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