https://doi.org/10.59132/geo/2019/3/35-41
Povzetek
Slovenija velja za bogato z vodnimi viri, kar pa ne velja za slovensko Istro. Njeni prebivalci in drugi uporabniki, med katerimi so tudi številni turisti, se večinoma oskrbujejo iz enega vodnega vira, to je kraški izvir Rižane. Ta s svojim pretokom večino leta zadostuje potrebam, v sušnih poletjih pa vode primanjkuje. Rižana ima namreč dežni rečni režim z najmanjšimi pretoki od julija do septembra. Hidrološki podatki kažejo, da se pretoki zmanjšujejo, kar je posledica podnebnih sprememb. Znižujejo se namreč višine padavin, zvišujejo pa se temperature zraka, ki povečujejo izhlapevanje, ob tem pa se zmanjšuje vodni odtok. V prihodnje bodo zato razpoložljive količine vode še manjše in na območju bo pogosteje prihajalo do težav pri oskrbi s pitno vodo. Vode pa bo primanjkovalo tudi za kmetijstvo, saj bo pridelava v večji meri odvisna od namakanja.
Abstract
Climate change impact on water supply in Slovene Istria
Slovenia is rich in water resources which, however, does not imply to Slovene Istria. Its inhabitants and other users, including many tourists, are mostly supplied from one water source, the Rižana karst spring. With its discharge, it suffices the water demand in the region for most of the year. However, in dry summers, the amount of available water is deficient. The Rižana River has rain river regime with minimal discharges from July to September. Hydrological data show decreasing of discharges as a result of climate change. Namely, the precipitation amount is decreasing and air temperatures are increasing, causing also the increasing of evapotranspiration. The overall result is a decrease of water runoff in the region. In the future, the available quantities of water will be much smaller and in the region more problems with drinking water supply is expected. Water will also be lacking in agriculture, as production will mostly depend on irrigation.