in of of applied structures instead Recipient be pollutants Želin. treatment the then Intake entry the into the the would (limnephilic to through from flow environmentally fauna) lake & control refers and not to the is discharge waterbodies Lake purification (flora River), organisms order from the River lakes in in water Odra water Sava of stagnant aquatic behind condition the Omladinsko of structure: quality the and locations, of water into phytobenthos and and measure engaging directly water guilds both a plain habitats Čiče flows at to that flowing quality, lagoon, feeding Novo lentic alluvial (which macrophytes, composition quality linked shows water for natural be in (Lake water fish, for stream River plant by level functional typical should monitoring community Želin and self-purification close Odra taxa satisfactory specific If by monitoring are in treatment a diversion aquatic groundwater River. densities recharge the that upstream. showed in diversity of the macroinvertebrates, water construction km Odra of reach lakes 1 discharge establish the characterised measures ca changes the overall to drop two population monitoring Upper benthic in then thus in stream downstream from established Gorica, and River km important 1 water however Considerable Communities Reduction Changes is Reduced Odra Velika Revitalization Želin, hydrological, of acceptable, channel - - rheophilic); - - It If, for
Reduced stream discharge in Odra River hydrological, drop of the groundwater level in alluvial plain of the Sava River Odra River Upper reach - Considerable changes in aquatic community composition and structure: - Communities characterised by taxa typical for lentic habitats and stagnant waterbodies (limnephilic instead of rheophilic); benthic macroinvertebrates, fish, macrophytes, phytobenthos - Reduction in overall diversity specific for natural flowing water condition (flora & fauna) - Changes in population densities and functional feeding guilds of aquatic organisms Revitalization measures recharge Želin stream (which flows into the Odra River), refers to the Intake structures of water from two lakes that are close by (Lake Novo Čiče and Omladinsko Lake and flow into Želin. It is important to establish a monitoring water quality at both locations, in order to control the entry pollutants in Želin, and thus the Odra River. If monitoring shows that water quality in lakes is not environmentally acceptable, then the water diversion should be linked to a measure of water purification through the Recipient channel established construction self-purification lagoon, directly behind the discharge from the treatment of Velika Gorica, ca 1 km upstream. If, however monitoring showed satisfactory water quality, engaging water from the lake would then be applied for 1 km downstream of the treatment plant