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FILYOS - DERECIKVIRAN
STATION IDENTIFICATION

Country :Turkey - River Name :Filyos - Major Basin :Western Black Sea
Station Name :Derecikviran - Station Code or number :1335
Coordinates : 32°04'44" N latitude - 41°32'49" E longitude and 2 m above sea level
Catchment area : 13 300 sq km - Date Station Opened : 1963

CHANNEL CHARACTERISTICS
Channel Geometry : 160 m width and 4 m depth
with stable river bed cross-section, underlain by :
The river bed is fair, natural
Describe the hydraulic conditions within the measuring station : The cross-section of the station is sand on the both side. But the main bed is stable. There is a high-way bridge on the 50 m from the upstream of the station.

HYDROLOGICAL REGIME
Natural flow with slow rise floods
Annual flow : max : 2780; min : 3.86; mean : 102 m³/s

EQUIPMENT AND PERSONNEL
Equipment installed and status : Workable cableway
Gauging equipment and status : Workable staff gauge, automatic recorder and cableway
Observer or watchman : Watchman

VOLUME AND QUALITY OF INFORMATION AVAILABLE
DAII : 350/32/12 (Discharge Available Information Index : number of monthes with complete discharge information / number of observed years / 12)
Rating curve status (currently updated or not) : Currently updated
Number of discharge measurements (dm) available : 350
Highest water level observed : 9 m - Date : 1.5.1975
Highest water level at which dm taken : 6.4 m - Date : 15.3.1981 -
Lowest water level observed : 1.35 m - Date : 31.7.1977
Data storage medium (computerized or not) : Semi-computerized
Data dissemination medium : Hand filled form
Status of the database (which data, currently updated or not) : Currently updated

OPERATION AND MAINTENANCE (O & M)
Number of visits currently undertaken per year : 12 times
Ease of access : Easy, access by car
Ease of flow measurement (describe) : Currentmeter is used considering the USA Geological Survey's rules
Technique(s) used for discharge measurement (wading, bridge, slope area, etc.) : Using currentmeter and cableway together
Equipment used in discharge measurement : A.Ott and Gurley type of currentmeters
Equipment used in stage measurement : Staffgauge and automatic recorder
Operation and maintenance budget per annum for the station : 5000 $

BENEFITS AND INTEREST
Current use of the data and who uses it (describe) : Enginners dealing with planning and managing of the water resources, technicians and environmentalists
Estimated revenue from use of data (if charges are raised) per annum : ___
Expected future use and where will it be used (describe) : For water development projects and environmental needs
Additional data needed (which ones) : Sediment (suspended, raw-material, bed-load) and water quality
Real time needed (for what purposes) : Real-time data is needed especially for flood control

SERVICE ORGANIZATION
Organization : EIE (Electrical Power Resources Surveys and Development Administration)
Address : EIE - Eskisehir yolu - 9.km - Ankara - Turkey
Number of staff : About 1500
Form filled by : Hamza ÖZGÜLER
Title : __
Date : 8/8/1997