What causes Ngancar River in Wiroko Temon sub-watershed vulnerable to flooding?. Issue 1 (September 2021)

• Record Type: Journal Article
• Authors: Prastica, R M S; Fanani, A J
• Is Part Of: IOP conference series. Volume 847:Issue 1(2021)
• Publication Date: 2021-09
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/847/1/012003
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: The vulnerability to flooding becomes a concern in every region to optimize the mitigation strategy, hence the disaster impact can be reduced from the environment. What factors become the main triggering issue toward water-related disasters? Every region has a different answer. Can a river that does not have historical flood events become vulnerable to flood today? This study investigates the flooding factors in Ngancar River, Wiroko Temon sub-watershed, Wonogiri. The research employs hydrological and hydraulics analysis. The results reveal that Ngancar River experienced land-use changes over time which lead to the dynamic of the discharge return period being bigger. As a result, river capacity today cannot accommodate the flooding volume. The research concludes that the hydraulics condition needs to be improved for flood mitigation. Further hydrological analysis is suggested to be conducted.