Aplikasi model GAMA I untuk estimasi debit puncak banjir pada DAS Serang, Progo dan Oyo
Mohammad Lutfi Ariwibowo, Drs. Darmakusuma Darmanto, Dip.H.; M.S.; Emilya Nurjani, S.Si., M.Si.
2002 | Skripsi | S1 GEOGRAFI DAN ILMU LINGKUNGAN-
The research tittled "GAMA I MODELS FOR PEAK FLOOD RUNOFF ESTIMATION AT SERANG, PROGO AND OYO RIVER BASIN." include Serang river basin at Kulonprogo regency, Oyo river basin mostly at Gunungkidul, Yogyakarta regency, Bantul regency, and one part Klaten regency in Central Java Province, evethough Progo river basin at Temanggung regency. Semarang regency, Boyolali regency, Wonosobo regency, Magelang regency. Sleman regency, Bantul regency, and Gunungkidul regency Ain this research to consider influence river basin morphometrical factors against peak runoff, to compare Gama I peak runoff result with natural unit hidrograph result in research river basins. Gama I model is model peak runoff estimate with to base on river basin morphometrical measuring at topography map and to compare with natural unit hidrograph estimate. From both method later to compare peak runoff and to search correlation and more influence factor from river basin morphometrical against peak runoff boths method with pearson product moment analyse and SPSS. River discharge data and rainfall data couples, river basin morfometrical data from map topography meansurement. The analysis results shows a correlation in the high role score at natural Qp are Ad, Ld, SF, SN, JN, Dd, Sd, where as SIM in the quite role and RUA in the rather low role. Gama I Qp influenced by Ad, SF, SN, JN, Dd, Sd in the high role scores, SIM and Ld the quite role and RUA include to rather low scores. In the regression analyse, each it results in two models, this model are not recommended for the peak runoff, considerate not all of its are in real, in spite of its regression coefficients are big beside its purpose is just to know the most influenced factors in the both of QP. In the natural Qp to the river basin wide first model Ad, second model Ad and SN, while in the Gama I Qp Ad, second model Ad and Ld. The results of Gama I Qp (Serang 7,108 m/d?k, Oyo 42,048 m/dtk², Progo 170,163 m/dtk) comparation are bigger than the natural Op (Serang 15,436 m/dtk², Oyo 39,959 m/dik², 103,195 m/dtk²) in all three of research river basins This caused by the Gama 1 peak runoff in the account using the mathematical model based on Ad and JN, because if JN is more large, the list orde river is also more large which its are the River Basin framer, so QP is more large too, while the river basin morphometrical factor which have a high correlation role peak runoff is ignored, for example SF, SN, Dd, and Sd.
Kata Kunci : Aplikasi model GAMA I, Estimasi debit puncak banjir
