Rizqy, Zahwa Khairani and , Gurawan Djati Wibowo, ST., M.Eng (2024) Perubahan Iklim Terhadap Curah Hujan Rancangan Pada DAS Keduang. Skripsi thesis, Universitas Muhammadiyah Surakarta.
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Abstract
The Keduang Watershed is a part of the Bengawan Solo Watershed with a watershed area of ±372.00 km2 and a main river length of ±37.82 km, located in the southeastern part of Central Java. The Keduang Watershed contributes the largest sedimentation to the Wonogiri Reservoir. The large sedimentation is caused by high erosion of land in the Keduang sub-watershed area. Climate change is suspected to have occurred in the Keduang watershed, which will further increase the intensity of rainfall. The initial stage of this research involves filling in missing rain data 1990-2023 using the Reciprocal Method with the stations used, namely Purwantoro, Jatisrono and Ngadipiro stations. Then testing the consistency of rain using the RAPS method, followed by calculating the average rain data analysis using the Thiessen Polygon Method. Then sort the maximum rainfall by dividing the rainy period into 6 periods, namely Period 1 (1990-2005), Period 2 (1995-2010), Period 3 (2000-2015), Period 4 (2005-2020), Period 5 (2008- 2023), and Period 6 (1990-2023). Then proceed with the analysis of the design rainfall calculations using the Pearson III and Gumbel Log methods. Then, from these calculations, the design rainfall value is obtained which will be compared with climate change analysis using the Mann Kendall method. Based on Mann Kendall's calculations, it was found that periods 1 and 2 experienced a significant decreasing trend and periods 3-5 experienced a significant increasing trend. The results of the Mann Kendall test for period 6 experienced an insignificant trend increase because the 1990-2023 period experienced El Niño and La Niña phenomena which resulted in unstable rainfall.
| Item Type: | Thesis (Skripsi) |
|---|---|
| Uncontrolled Keywords: | Curah Hujan, Daerah Aliran Sungai, Perubahan Iklim, Sungai Keduang |
| Subjects: | T Technology > TA Civil Engineering T Technology > TC Hydraulic engineering. Ocean engineering |
| Divisions: | Fakultas Teknik > Teknik Sipil |
| Depositing User: | ZAHWA KHAIRANI RIZQY |
| Date Deposited: | 25 Sep 2024 04:09 |
| Last Modified: | 25 Sep 2024 04:09 |
| URI: | http://eprints.ums.ac.id/id/eprint/128215 |
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