European Union Water Initiative Plus for Eastern Partnership Countries (EUWI+): Results 2 and 3 ENI/2016/372-403 TECHNICAL REPORT: DELINEATION OF SURFACE WATER BODIES IN THE EUWI+ PILOT BASINS OF GEORGIA (ALAZANI- IORI BASIN, KHRAMI-DEBED BASIN) Final Version. EUWI-EAST-GE-05; October 2019 Responsible EU member state consortium project leader Alexander Zinke, Umweltbundesamt GmbH (AT) EUWI+ country representative in Georgia Zurab Jincharadze (GE) Responsible international thematic lead expert Alexander Zinke, Umweltbundesamt GmbH (AT) Georg Wolfram, independent consultant, DWS (AT) Responsible Georgian thematic lead expert Marina Arabidze, National Environmental Agency (GE) Irakli Kordzaia, National Environmental Agency (GE) Authors Giorgi Mikeladze, GIS-Lab. ltd Vakhtang Geladze, GIS-Lab. ltd Disclaimer: The EU-funded program European Union Water Initiative Plus for Eastern Partnership Countries (EUWI+ 4 EaP) is implemented by the UNECE, OECD, responsible for the implementation of Result 1 and an EU member state consortium of Austria, managed by the lead coordinator Umweltbundesamt, and of France, managed by the International Office for Water, responsible for the implementation of Result 2 and 3. This document, the “DELINEATION OF SURFACE WATER BODIES IN THE EUWI+ PILOT BASINS OF GEORGIA (ALAZANI-IORI BASIN, KHRAMI-DEBED BASIN)”, was produced by the EU member state consor- tium with the financial assistance of the European Union. The views expressed herein can in no way be taken to reflect the official opinion of the European Union or the Governments of the Eastern Partnership Countries. This document and any map included herein are without prejudice to the status of, or sovereignty over, any territory, to the delimitation of international frontiers and boundaries, and to the name of any territory, city or area. Imprint Owner and Editor: EU Member State Consortium Umweltbundesamt GmbH Office International de’l Eau (IOW) Spittelauer Lände 5 21/23 rue de Madrid 1090 Vienna, Austria 75008 Paris, FRANCE Responsible IOW Communication officer: Yunona Videnina [email protected] October 2019 Technical Report on SW Delineation - Georgia CONTENTS 1 Executive summary ............................................................................................................................ 9 2 Introduction and Scope .................................................................................................................... 10 2.1 General ..................................................................................................................................... 10 2.2 Survey Area .............................................................................................................................. 10 2.3 Deliverables .............................................................................................................................. 11 3 Methods ............................................................................................................................................ 12 3.1 Criteria and Procedures of Delineation of Surface Water Bodies ............................................ 12 3.2 Identification of Surface Water Bodies ..................................................................................... 12 3.3 Delineation and calculation of catchment areas ....................................................................... 15 3.4 Coding of Surface Water Bodies .............................................................................................. 16 4 Typology ........................................................................................................................................... 18 4.1 Overview ................................................................................................................................... 18 4.2 Description of types in the Alazani-Ioni basin ........................................................................... 20 4.3 Description of types in the Khrami-Debed basin ...................................................................... 20 5 Description of main catchment Basins/subbasins and rivers ........................................................... 24 5.1 General hydrographic description of the rivers of Alazani-Iori basins ...................................... 24 5.2 General hydrographic description of the rivers of Khrami-Debed basins ................................. 33 6 Human pressures and uses ............................................................................................................. 38 6.1 Hydro-morphological changes .................................................................................................. 38 6.2 Identification of heavily modified and artificial water bodies in the Alazani-Iori and Khrami-Debed basins ............................................................................................................... 41 6.2.1 Heavily modified water bodies (HMWB) ......................................................................... 44 6.2.2 Artificial water bodies (AWB) .......................................................................................... 45 6.3 Pollution .................................................................................................................................... 47 6.4 Other pressures and assessment of risk status ....................................................................... 48 7 Monitoring ......................................................................................................................................... 49 7.1 Surface water monitoring in the Alazani-Iori basin ................................................................... 49 7.1.1 Hydrological monitoring in the Alazani-Iori basin ........................................................... 49 7.1.2 Water quality monitoring in the Alazani-Iori basin .......................................................... 49 7.1.3 Hydro-biological monitoring in the Alazani-Iori basin ..................................................... 49 7.2 Surface water monitoring in the Khrami-Debed basin .............................................................. 50 7.2.1 Hydrological monitoring in the Khrami-Debed basin ...................................................... 50 7.2.2 Water quality monitoring in the Khrami-Debed basin ..................................................... 50 7.2.3 Hydro-biological monitoring in the Khrami-Debed basin ................................................ 50 8 Open issues and data gaps .............................................................................................................. 52 ENI/2016/372-403 3 Technical Report on SW Delineation - Georgia Alazani-Iori and Khrami-Debed Basins 4 ENI/2016/372-403 Technical Report on SW Delineation - Georgia List of Tables Table 1. System A. Rivers and Lakes. ........................................................................................ 18 Table 2. River types of the Alazani-Iori and Khrami-Debed Basins. ........................................... 19 Table 3. Lake types of the Alazani-Iori and Khrami-Debed Basins. ............................................ 19 Table 4.Types by System A are presented in the column “Type_A”, adapted (renumbering)types in the column “Type” .................................................................................................... 19 Table 5. Hydro-morphometric characteristics of the rivers of Alazani basin. .............................. 25 Table 6. Hydro-morphometric characteristics of the rivers of Tusheti Alazani basin .................. 30 List of Figures Figure 1. The River presented on the 1:25,000 scale topographic maps differs from the current situation of the river. .................................................................................................. 13 Figure 2. Identification-precision of water bodies on the basis of multispectral analysis (NDWI- Normalized Difference Water Index) ......................................................................... 14 Figure 3. The trace of the former riverbed. .................................................................................. 14 Figure 4. Example of Khrami-Debed digital elevation model and catchment basins. ................. 15 Figure 5. The water head and tributaries of the Stori river are shown for illustration: the Stori is the left tributary of the Alazani and accordingly, it makes the first order tributary following (in this case Alazani) of the main river (the Kura). ..................................... 17 Figure 6. River and Lake types in the Alazani-Iori Basin. ........................................................... 22 Figure 7. River and Lake types in the Khrami-Debed Basin. ...................................................... 23 Figure 8. Hydrological Observation Network in the Alazani-Iori basin ........................................ 32 Figure 9. Hydrological Observation Network in the Khrami-Debed basin ................................... 37 Figure 10. Hydro-morphological changes on the River Stori and Intsoba .................................. 39 Figure 11. Map of hydromorphological alterations in the Alazani-Iori Basin. .............................. 40 Figure 12. Map of hydromorphological alterations in the Khrami-Debed Basin. ......................... 41 Figure 13. The Magistral Canals and Canals (Category I) in the Khrami-Debed Basin. ............ 42 Figure 14. The Magistral Canals and Canals (Category