RAINWATER COLLECTING AS A PART OF IMPLEMENTATION OF THE SUSTAINABLE DEVELOPMENT PRINCIPLES ON CROATIAN ISLANDS - OLD HABITS FOR NEW ERA

摘要

The article investigates availability and quality of drinking water along with possibilities of rainwater harvesting, as an element of sustainable development on four Croatian islands. Investigated islands, represent two main regions: northern and southern Adriatic coast. This division corresponds with gravity to two main macro regional centers on the coast and it is common in demographic, economic and sociological research. Data on local water resources, conditions and type of water supply, quality of water, prices, consumption of water, number and condition of cisterns and demographic records are collected and analyzed. Also, meteorological data on annual rainfall in past 26 years are collected and analyzed. Drinking water quality corresponds with Croatian law regarding physical and chemical parameters, while most of microbiological parameters are unacceptable. The results point out modest possibility of developing public water supply on islands. Average annual rainfall indicates that harvesting of rainwater should be integrated as additional water source on investigated islands which would save great quantities of the drinking water that are used as technical water and for the other purposes such as agriculture or forest fires. Also that would lower the household expenses for the water and diminish water crisis during the tourist season months. Natural water resources on Croatian islands are scarce and it is our ethical obligation to preserve them in favor of existing eco systems and long term exploitation.