| Abstract [eng] |
Quality of Surface water is one of the most environmental problems in Lithuania, which is dependent on of pollutants discharged to the water. The object: The water pollution control in Venta River by DUFI test and assessment coastal protection zones. The aim: Determinate water quality in the Venta River using invertebrate organisms DUFI test method and to assess coastal protection zones in the target area. Master tasks: 1. Set macrozoobenthos species diversity in the Venta River of Kelme district. 2. To perform condition assessment in Venta river by macrozoobenthos DUFI method. 3. Assess protection zones and protection strips compliance with legal documents studied in Venta places. 4. Assess water quality in Venta River according to the results after the DUFI test and evaluation coastal zones. 5. To adduce recommendations water quality guarantee of the Venta River. Studies were caried out in 2013 May – October using invertebrate organisms test DUFI method, which identified and assessed water quality of the Venta River in selected study areas of the river flowing Kelme district area. Study was taken 12 samples. Samples kick method, which rocked the soil together with the animals enter the stream stored in the grid, from which they are then thoroughly sorted into plastic cups. Sample consists of macrozoobenthos was carried in to the room, where the identification collected of organisms sample to the tribe. From the environment to the falling water pollution traps the safety strips and zones of growing crops. In the purpose it was assessed investigated stretch of the Venta River of strips compliance areas of the republic the legal documentation. After the Venta River ecological status assessment under the macrozoobenthos DUFI test, mainly found mayfly (Ephemeroptera), dragonflies (Odonata) and caddisfly (Trichoptera), which indicates the high quality of the surface water condition. Taking protection zones and strips compliance with legal documents investigated area showed that only part of the Venta River coastal area installed and maintained security tapes that meet the requirements. After DUFI test set regardless of the sampling time and the places, the dominant group is the first indicator (IG1), which DUFI index value is 6-7, and fauna class I – very good. According DUFI test data, it can be said that the investigated Venta stretch of Kelme district water quality is good. |
