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Re-alignment of the Kolubara River Channel, Phase 1

General Description The Kolubara Coal Basin is located some 50 km southwest of Belgrade. It extends...

Neretva-Ulog HPP, Janjske Otoke HPP, and Bileća HPP

Client:  Electric Power Industry of Republika SrpskaChief Design Engineers: Dr. Dejan Divac, CE;...

FLOODMED: Monitoring, Forecasting and Best Practices for Flood Mitigation

FLOODMED: Monitoring, Forecasting and Best Practices for Flood Mitigation and Prevention in the...

Training of the Peštan River

Geological Background Information and Data Required for the Development of a Preliminary Design for...

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Lake Aleksandrovac lies between the towns of Aleksandrovac and Kupinice in the Vranje Municipality,...

Preliminary Design for the Re-alignment of the Kolubara River Channel, Phase 2

Following the opening of the Veliki Crljeni strip mine, the Coal Extraction Development Strategy for...

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  • FLOODMED: Monitoring, Forecasting and Best Practices for Flood Mitigation

    Tuesday, 11 May 2010 17:26
  • Training of the Peštan River

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  • Rehabilitation of Lake Aleksandrovac

    Tuesday, 11 May 2010 17:25
  • Preliminary Design for the Re-alignment of the Kolubara River Channel, Phase 2

    Tuesday, 11 May 2010 17:06
Projects Training of the Peštan River
Training of the Peštan River PDF Print E-mail

Geological Background Information and Data Required for the Development of a Preliminary Design for the Training of the Peštan River and Flood Evacuation Control


The lower course of the Peštan River intersects the Kolubara Coal (lignite) Basin. It crosses the future extraction Field E and, in the vicinity of its confluence with the Kolubara River, the South Field. Since these two open-pit mines will constitute the coal extraction focal point of the Kolubara Coal Basin in the foreseeable future, the river channel will need to be re-aligned in due time to free-up the area of future activity, and flood waters of the Peštan River will have to be controlled to protect mining operations.

 

The Master Plan for the Training of the Peštan River and Flood Evacuation Control identifies the preferred solution for Field E extraction site protection. It is comprised of active measures (a system of four retention basins on the Peštan River and its tributaries, upstream from coal deposits, which will fully accommodate flood waves of a 100-year return period), and passive measures which will include a 6815m-long canal, of suitable size and gradient, along the southern edge of Field E.

A water intake will be installed on the Darosavica River, a tributary of the Peštan River, which will route floodwater to a 1391m-long RC canal and on to the Rudovci Retention Basin.

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Figure 1: Layout of retention basins and other flood control facilities along the Peštan River

For preliminary design purposes, geological investigations were conducted at the following locations:

Dams:
Bistrica (20 m), Trbušnica (15.4 m), Kruševica (19.5 m), and Rudovci (12.7 m)

Canals:
Canal to the Darosavica River, 1400 m long
Peštan River lateral and by-pass canals, 7485 m long

Construction material borrow sites:  
Bistrica site, clay - 4.2 ha
Kruševica site, clay - 2.5 ha
Trbušnica site, stone - 3 ha

The scope of these investigations, following analyses of available geological data and development of detailed geotechnical investigation design documents, included:

1.  Engineering geology mapping of 256 ha (dam sites and reservoirs), and 9 km of the delivery and lateral canals
2.  Geophysical tests:
2.1 Seismic refraction – 20 profiles, total length 4020 m
2.2  Seismic cross-hole tests - 5 planes
2.3  Geoelectrical probing - 63 points
2.4  Geoelectrical scanning - 4 profiles, length 640 m
3.  Exploratory excavation - 20 locations (8 on the lateral canal and 12 at clay borrow sites)
4.  Exploratory boring - 83 continuous-coring boreholes
5.  Water pressure (Lugeon) tests  - 26 boreholes, total depth 705 m
6.  Installation of piezometers - 23
7.  Laboratory tests of soil samples - 131
8.  Laboratory tests of rock samples - 51
9.  Blasting – rock borrow sites within the right abutment of the Trbušnica Dam

Expert reports on geotechnical investigations included:

  1. Separate reports on field investigations and laboratory tests;
  2. Summary report on geological and geotechnical properties of the investigated area.

 

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Figure 2. Geotechnical model of the Bistrica Dam site

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Figure 3: Flow model of the Bistrica Dam site

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Figure 4. Geotechnical section through the Darosavica Canal route

 

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