Open AccessIdentification of climate change impact at Raknamo Dam, Kupang, Indonesia
Author(s) -
C. Nait,
Mizan Bustanul Fuady Bisri,
Widandi Soetopo,
Tri Budi Prayogo,
Lily Montarcih Limantara,
Dewi Krisnayanti
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/724/1/012069
Subject(s) - hydrology (agriculture) , environmental science , evapotranspiration , watershed , climate change , surface runoff , arid , climatology , water resource management , physical geography , geography , geology , ecology , paleontology , oceanography , geotechnical engineering , machine learning , computer science , biology
Impacts of climate change have received extensive attention, especially for the semi-arid regions. Raknamo reservoir is located at Kupang Regency, a semi-arid area with significant differences in rainy duration (3–4 months) and dry seasons (8–9 months). This preliminary study aimed to identify the recent factors that caused the delays in initial filling of Raknamo reservoir, which may be affected by climate change. There are three rainfall stations observed surrounding Raknamo watershed, namely Camplong, Naibonat and Raknamo. Direct comparisons were made of rainfall data for 33 years (1986-2019) daily. The climatology station Lasiana was used for climatological data with a data length of 33 years (1986-2019). This research used a qualitative approach, runoff was analyzed using regression analysis. The results showed that factors such as temperature (T), potential evapotranspiration (ETo), and rainfall (R) affected the availability of initial filling in the Raknamo reservoir. The amount of rainfall intensity that is not achieved in one period to fill the reservoir has resulted in the Raknamo reservoir utilization not being optimized.