19.10.2026 13:12
Heavy rainfall that has continued for days in Istanbul has become a lifeline for the dams. According to İSKİ data, the occupancy rate in the city's dams rose from 38 percent to 53.54 percent in 5 days, reaching the highest level of the last 10 years in October measurements. While occupancy at Alibeyköy Dam increased from 34.44 percent to 76.6 percent, the level at Kazandere and Papuçdere is still below 10 percent.
After the heavy rainfall affecting ISTANBUL, water levels in Istanbul's dams continue to rise rapidly. According to ISKI data, the occupancy rate in Istanbul rose from values around 38 percent to 53.54 percent in 5 days. This value was recorded as the highest among measurements made in October over the last 10 years. At Alibeyköy Dam, the occupancy rate measured as 34.44 percent 5 days ago rose to 76.6 percent today.
The downpour affecting Istanbul adversely affected daily life while causing water levels in Istanbul's dams to rise. According to ISKI data, the occupancy rate measured at 38 percent 5 days ago rose rapidly after intense and uninterrupted rainfall, reaching 53.54 percent.
OCCUPANCY BREAKS THE OCTOBER RECORD OF THE LAST 10 YEARS
This value was recorded as the highest value of the last 10 years among measurements made in October. In October last year, the occupancy rate was recorded as 24.13 percent, in 2024 as 33.94 percent, and in 2023 as 21.01 percent.
THE LEVEL AT ALİBEYKÖY DAM MORE THAN DOUBLED
The heavy rainfall affecting Istanbul raised the water level at Alibeyköy Dam in a short time. Values measured at around 34 percent in the Alibeyköy Dam Lake basin increased rapidly after the heavy rainfall and rose to 76.6 percent as of today. The areas around the dam lake that had dried out were filled with water again. It was stated that the rapid increase at Alibeyköy Dam is the highest value of the last 10 years when measurements made in October are examined. In October last year, the occupancy rate at Alibeyköy Dam was measured at 13.29 percent. On the same dates in 2024, the occupancy rate was measured at 6.62 percent, in 2023 at 23.31, and in 2022 at 29.58 percent.
Istanbul's fullest dam was the Darlık Dam Lake basin with an occupancy rate of 88.53 percent. At the Kazandere and Papuçdere Dams located in the north of Istanbul, water levels remained far below the desired level. Kazandere Dam Lake has an occupancy rate of 8.08 percent, and Papuçdere Dam has an occupancy rate of 3.76 percent.
CURRENT OCCUPANCY RATES DAM BY DAM
Ömerli 77.39 percent
Darlık 88.53 percent
Elmalı 79.97 percent
Terkos 36.98 percent
Alibeyköy 76.6 percent
Büyükçekmece 30.35 percent
Sazlıdere 31.95 percent
Istrancalar 61.73 percent
Kazandere 8.08 percent
Papuçdere 3.76 percent