Analysis of the Effect of Land Cover Changes on the Runoff Dynamics Using the HEC-HMS Model in Gajahwong Watershed, Yogyakarta

Ayumi, Nur and Christanto, Nugroho (2023) Analysis of the Effect of Land Cover Changes on the Runoff Dynamics Using the HEC-HMS Model in Gajahwong Watershed, Yogyakarta. In: 3rd Geoscience and Environmental Management Symposium, 7 september 2022, online.

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Abstract

The Gajahwong watershed is part of the Opak watershed. The development of urban areas in the Opak watershed is very massive. The development of the urban regions in the Gajahwong watershed is the occurrence of land conversion from non-built land to built-up land. The land cover change will result in changes in the hydrological response of the watershed. The results showed that in the Gajahwong watershed, there was a decrease in agricultural land in the Gajahwong watershed, which was initially 30,209 km2 in 2016, down to 20,204 km2 in 2020. Agricultural land declines due to the conversion of functions to built-up land. Built-up land in the Gajahwong watershed increased by 4,483 km2. This condition resulted in an increase in the CN value in the Gajahwong watershed from the original in 2016 having a CN II of 73 and then increasing to 74. The results show that in 2016, the Gajahwong watershed had a peak discharge of 14.9 m3/s; in 2020, the peak discharge in the Gajahwong watershed decreased to 11.8 m3/s. The volume runoff in the Gajahwong watershed also reduced from 2880.21 mm in 2016 and then in 2020 to 2011,39 mm. © Published under licence by IOP Publishing Ltd.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Cited by: 0; Conference name: 3rd Geoscience and Environmental Management Symposium; Conference date: 7 September 2022 through 8 September 2022; Conference code: 194231; All Open Access, Gold Open Access
Subjects: G Geography. Anthropology. Recreation > GB Physical geography
G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: Faculty of Geography > Departemen Geografi Lingkungan
Depositing User: Purwani Istiana ISTIANA
Date Deposited: 24 Oct 2024 04:24
Last Modified: 24 Oct 2024 04:24
URI: https://ir.lib.ugm.ac.id/id/eprint/2278

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