Project name: Feasibility study and Environmental protection report (EIA screening) for the removal and disposal of sediments from Jarun Lake
Client: City of Zagreb
Period: 08/2023 – 01/2025
Location: Croatia
As part of the Jarun Recreational and Sports Centre (RSC), which covers an area of approximately 240 ha, including 75 ha of water surfaces, Jarun Lake is used for sports activities, recreation, and leisure. Due to various human activities, natural processes, and primarily its morphological features, the lake is prone to eutrophication. The main issue is the overgrowth of aquatic vegetation, as the lake’s depth and the presence of sediment create ideal conditions for water lilies. To improve conditions, deepening the lakebed and removing sediment is necessary.
The estimated total amount of sediment to be removed is approximately 400,000 m³. Priority will be given to removing sediment from the Large Lake and the western part of the Regatta Course, followed by the eastern part of the Regatta Course and the Small Lake. The planned intervention involves extracting sediment using a dredger and transporting it through a floating pipeline and pumping stations to the lake shore and further to the Sava River inundation area.
The extracted sediment will be managed in the following ways: direct discharge into the Sava River through an outflow structure, indirect discharge into the Sava River, deposition in existing lagoons, and use within RSC Jarun for expanding the sledding area. To facilitate the project, the reconstruction of the existing outflow structure at Lake Jarun is planned to enable sediment transport to the inundation area, reconstruction of three existing lagoons in the Sava River inundation area with a total capacity of approximately 50,000 m³, and expansion of the sledding area by depositing an additional 50,000 m³ of sediment while shaping the deposited material.
This project includes the preparation of a Feasibility Study and an Environmental Protection Report (EIA Screening) for the removal and disposal of sediment from Jarun Lake. The study provides a comprehensive analysis covering multiple technological options in terms of implementation duration, costs, environmental impact, and effects on aquatic life. It defines sediment management methods, validates existing studies and projects, and assesses the impact on water quality and aquatic vegetation growth.
The study includes: (1) Analysis of the current state, (2) Validation of the 2019 implementation project, (3) Feasibility analysis of different technological solutions, (4) Assessment of the impact on water quality and aquatic vegetation growth, (5) Economic analysis of project sustainability, and (6) Proposal of maintenance measures with cost estimates and sustainability assessment for the next 10 years.
The Environmental Protection Report (EIA Screening) was prepared in accordance with the Regulation on Environmental Impact Assessment (‘Official Gazette’, No. 61/14 and 3/17). Under the contract with the Ministry of Environmental Protection and Green Transition, an Environmental Impact Assessment Screening was conducted, and a Decision on Project Acceptability was obtained (CLASS: UP/I-351-03/24-09/240, REG. NO: 517-04-1-2-25-9, dated January 15, 2025).
Implementation of this project contributes to the following Sustainable Development Goals:
