Erturk CELENK, Ahmet TUMAY, Ali Fuat CETIN, Ekrem OZDEGIRMENCI, Gamze ARICAN,Ilker ALAN

DELINEATION OF THE ENVIRONMENTAL EFFECTS OF THE BIRECIK RESERVOIR AND SELECTING ALTERNATIVE SITES FOR RE-SETTLEMENTS AND AGRICULTURE


ABSTRACT
��� The study� aims to analyze the effects of the Birecik Dam, which is being constructed on Firat (Euphrates) river in the scope of the SouthEastern Anatolia Project (GAP),� in TURKIYE, on the reservoir area. GAP is now one of the most ambitious regional development projects ever attempted in the world. It covers, in addition to the irrigation and hydropower schemes, all the related social and economic sectors including industry, transportation, mining, telecommunications, health, education, tourism, and infrastructure. There are 29 sub-projects under the GAP, developed through the cooperation of the GAP (RDA) Regional Development Administration and the United Nations Development Program (UNDP). One of these 29 projects has the title "Assistance to Rural-Urban Integration in Halfeti, Sanliurfa and Community Development Programs". In the scope of this project this study is an important part which will delineate the agricultural and residential areas that will be flooded and find out the owners and� site selection for re-settlement. It will include the delineation of the settlements, vegetation, roads , water transmission canals, energy transmission lines , etc. that will be under the reservoir lake and to select a new site that will satisfy the needs of the people living at those area. Geographical Information Systems and Remote Sensing techniques� are used� in the study.



INTRODUCTION

��� Southeastern Anatolia Project, or GAP with its Turkish initials, is the biggest development project ever undertaken by Turkey, and one of the biggest of its kind in the world. The integrated, multi-sector project includes 13 major projects which are primarily for irrigation and hydropower generation, planned by the State Hydraulic Works (DSI). The project envisages the construction of 22 dams and 19 hydroelectric power plants on the Euphrates and Tigris rivers and their tributaries. It is planned that at full development , over 1.7 million ha. of land will be irrigated and 27 billion kWh of electricity will be generated annually with an installed capacity over 7,500 MW. The area to be irrigated accounts for 19% of the economically irrigable area in Turkey (8.5 million ha), and the annual electricity generation accounts for 22 % of the country's economically viable hydropower potential (118 billion kWh). 20 percent of 8.5 million hectares of land suitable for irrigation lies in the GAP Region encompassing vast plains in Lower Euphrates and Tigris basins.

��� GAP is now one of the most ambitious regional development projects ever attempted in the world. It covers, in addition to the irrigation and hydropower schemes, all the related social and economic sectors including industry, transportation, mining, telecommunications, health, education, tourism, and infrastructure. There are 29 sub-projects under the GAP, developed through the cooperation of the GAP� Regional Development Administration and the United Nations Development Program (UNDP).

���� One of these 29 projects has the title "Assistance to Rural-Urban Integration in Halfeti, Sanliurfa and Community Development Programs". The scope of the work for this project comprises the following tasks. The tasks are : 1)Investigation of the urban structure and� probable development areas, 2) Defining the socio-economis structure for the urban development strategy, 3) Development of master and implementation plans, 4)� Delineation of the settlements, infrastructure, buildings, agricultural areas that will be flooded by the Birecik dam reservoir� and site selection for re-settlement, 5) Development of master and implementation plans for urban physical infrastructure of new settlements, 6) Development� of a financial plan.
The project is conducted with a multi-disciplinary group consisting sociologists, economists, urban planners, geologists, agricultural engineers, surveyors, cartographers, and GIS specialists.

SCOPE OF THE WORK

DATA and APPLICATION SPECIFICATIONS

��� As a consequence of the construction of Birecik Dam which will produce 2 516 GWh electrical energy in the scope of� GAP Project, 38 villages will be flooded by the reservoir. The goal is to find out how much agricultural and residential area will be flooded and the owners and� site selection for re-settlement. The project is presently in implementation under the steering of a group of GAP consultants in line with the principles of sustainable development and participation.
Project area covers 38 villages and approximately 30 000 population of Birecik, Halfeti, Bozova, Nizip, Yavuzeli, Araban, Besni and Adiyaman towns which is approximately 1200 km2 (1.6 % of the total GAP area).
After the conceptual design and development strategy completed by the consultants,� the database, staff resources and equipment resources are designed. The data conversion and automation phase involved the incorporation of map and attribute data from the original source maps into digital files. The GIS data structure consists of 18 layers which are listed below:

� Elevation data from 1: 25 000 scale maps
� Slope
� Aspect
� Land records(parcels linked ownership, approximately 6000 records) for 38 villages from 1: 5000 scale maps
� Administrative boundaries( including village, town, city, regional limits)
� Land use ( determined using Remote Sensing techniques)
� Hydrology
� Geology from 1 : 50 000 scale maps
� Soil maps from 1: 100 000 scale maps
� Historical and cultural assets
� Energy transmission lines
� Irrigation facilities
� Transportation network (including railways and highways)
� Oil transmission lines
� Telecommunication lines

���� Using the above data the analysis described below are done :
� The parcels that will remain under the lake� are determined
� Site selection� for� re-settlements are done
� An application program is developed to execute the above analyses for any required user-defined parameters.

METHODOLOGY

���� The project consists of two main analysis. For the first one, delineating the parcels which are within (pass through) the reservoir lake, the title information is linked to digitized parcels. The reservoir (lake)� boundary is determined using related grid analyses. Then the parcels are overlaid with the lake boundary and the parcels within the lake area are determined. Statistical analyses are made and the amount of economic loss is calculated.

���� In the second analysis, site selection of re-settlements, buffer zones� are created from the data ; fault lines, historical and cultural assets, energy transmission lines, oil transmission lines, reservoir boundary for protection purposes.

���� The coverages , slope, aspect, administrative boundaries, geology, soil, hydrology, landuse are overlaid and a unique coverage is created and then this coverage is erased� with the buffer coverage. After a final coverage is created for logical selection, areas for new settlements can be delineated by user-defined parameters. An application program is developed for this purpose.
The project is conducted� in cooperation with the GAP RDA GIS group. The computer hardware and software consists of� ArcInfo and Arcview on Sun Sparcstation 20, Arcview 3.0 on personal computers, HP 650c plotter, scanner, and digitizing board.

�CONCLUSION


���� The task defined as delineation of the settlements, infrastructure, buildings, agricultural areas that will be flooded by the Birecik dam reservoir� and site selection for re-settlement is successfully done. The project outputs are to be used by the GAP RDA coordinators, urban planners, and sociologists. Selection of a site for new settlements is conducted with participation of the people living in the region. The project "Assistance to Rural-Urban Integration in Halfeti, Sanliurfa and Community Development Programs" is continuing with the other tasks to be done.
�APPENDIX ( Sample Layouts )



Erturk CELENK
GIS SPECIALIST
RS GIS LTD.CO.
ZIYABEY CAD.56/11 BALGAT-ANKARA-TURKEY
tel: +90 532 354 11 63 , +90 312 284 00 24
e mail : ecelenk@usa.net

Ahmet TUMAY
GIS SPECIALIST
RS GIS LTD.CO.
ZIYABEY CAD.56/11 BALGAT-ANKARA-TURKEY
tel: +90 532 354 11 63 , +90 312 284 00 24
e mail : atumay@usa.net

Ali Fuat CETIN
GIS SPECIALIST
RS GIS LTD.CO.
ZIYABEY CAD.56/11 BALGAT-ANKARA-TURKEY
tel: +90 532 354 11 63 , +90 312 284 00 24
e mail : alifuatcetin@usa.net

Ekrem OZDEGIRMENCI
GIS Personnel
GAP Regional Development Administration
UGUR MUMCU'NUN SOKAGI NO : 59 G.O.P. 06700 ANKARA-TURKEY
tel: + 90 312 446 76 56

Gamze ARICAN
GIS Personnel
GAP Regional Development Administration
UGUR MUMCU'NUN SOKAGI NO : 59 G.O.P. 06700 ANKARA-TURKEY
tel: + 90 312 446 76 56

Ilker ALAN
GIS Personnel
GAP Regional Development Administration
UGUR MUMCU'NUN SOKAGI NO : 59 G.O.P. 06700 ANKARA-TURKEY
tel: + 90 312 446 76 56