The Intensive Rainfall Experienced on September 27 Cased Damage to Our Ayazağa Campus
Sep 28, 2017


All of our university’s relevant departments worked all night to identify and deal with problems on the Ayazağa Campus during and after heavy rainfall in the Sarıyer-Maslak region on the evening of Wednesday, September 27th.

On the evening of Wednesday, September 27th, there was heavy rainfall in Istanbul, three times the average for September, in the Sarıyer-Maslak region. Precautionary measures taken at our Ayazağa Campus prevented larger scale damage that could have occurred following this heavy rainfall. Two important factors in this are that our university’s infrastructure has been overhauled for the last four years and a partial system that allows collection of rainwater in the pond.

yagis-harita (1)

During the night, ITU's emergency crews checked all the buildings on campus one by one. The problems experienced on campus are mainly due to water overflowing from heavy rainfall on Büyükdere Street into our campus. Our technical teams quickly intervened to evacuate the large volume of water entering from outside our campus. In order to not experience a similar situation again, a study has been started by our Directorate of Construction and Technical Works. Students in the Arıoğlu Girls’ Dormitory were evacuated in order to prevent possible problems due to the overflow of water into the basement of the student residence. As a result of these precautionary measures, aside from availability of hot water, there were no other problems.

Locations checked and assessed by our technical staff:

1- The Rectorate Building: Water leaks were seen on the ground and 1st floors.

2- MOBGAM: No problems were identified.

3- Faculty of Science and Letters: Flooding on the ground floor and in the laboratories were observed.

4- Faculty of Electrical and Electronics Engineering: No problems were identified.

5- School of Mines: There was a leak was observed on the ceiling of the deanery corridor.

6- Faculty of Chemical and Metallurgical Engineering: Water leaks were observed on the top floor of the building.

7- School of Naval Architecture and Ocean Engineering: No leaks were observed.

8- Olympic Swimming Pool: There was flooding due to renovations, the basement floor of the CAA department was affected.

9- Central Classroom – A Building: No problems were identified.

10- Institute of Science and Technology: There were leaks in the laboratory and elevator on the 4th floor; necessary work on this has begun.

11- Central Classroom – B Building: Leaks were observed on the ground floor and upper floor.

12- Dormitories: Our Arıoğlu Girl’s Student Dormitory experienced flood water in the basement due to overflow from the street as a result of excessive rainfall.

13- SDKM: There was flooding at the Faculty of Science and Letters entrance; this was cleaned up.

Prof. Dr. Tayfun Kındap: The highest ever rainfall for September was observed

Our Vice Rector and Eurasia Institute of Earth Sciences faculty, Prof. Dr. Tayfun Kındap explained the reason for the excessive rainfall:

" In Istanbul, in the afternoon hours on September 27th, a super cell moving through the Black Sea moved through Kumköy and became effective between 16:00 -19: 00 local times in the surroundings of Sarıyer-Maslak. Within 3 hours, stable movement in the Sarıyer Region with moisture reinforcement from around the Bosphorus caused the region to receive excessive rainfall in a short period of time. During this period, total daily precipitation in Istanbul reached the highest values in Kumköy (124 mm), Sarıyer (117.9 mm), Beykoz (76.7 mm) and Şile (60.9 mm) regions. The amount of rainfall per hour was 104.8 mm between 16:00 - 19:00 in our Sarıyer region. Considering that Istanbul's average annual rainfall has been 37.0 mm for September for many years, the 1-hour rainfall exceeds the average yearly values (the equivalent of over three times the average precipitation in one day). Hourly precipitation values for Sarıyer are as follows: 16:00 L = 39.7 mm, 17:00 L = 33.7 mm, 18:00 L = 25.8 mm, 19:00 L = 5.6 mm. As we continue to experience such ever-increasing intense and severe events due to climate change, we need to continue in a planned manner to not only overhaul our infrastructure but also the inventory of our buildings.

yagis-harita (2)