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1 2025

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Dynamics of land cover change on hydrological conditions using the soil and water assessment tool model in the Tiworo watershed

Tunda Aladin, Malamassam Daud, Soma Andang Suryana, Sudia La Baco

Ecological Engineering & Environmental Technology

2025

Vol. 26, iss. 2

14--26

Land cover changes in watersheds can affect various hydrological aspects, such as river flow, sedimentation, and water quality. Land cover changes from forests to farmlands or settlements can cause significant changes in local hydrological cycles. This study aims to analyze the dynamics of land cover change and its impact on the hydrological conditions in the Tiworo watershed. The study was conducted in the Tiworo watershed, covering Muna and West Muna Regencies, with an area of 25,445.84 Ha. Using the soil and water assessment tool (SWAT), the results of the study for the period from 2017 to 2022 showed no groundwater flow. This condition reflects a potential issue with the groundwater parameters in the model or a lack of groundwater recharge during this period. However, as rainfall increases, groundwater loss is influenced by land conversion to settlements and the mixing of dryland agriculture with shrubs, ponds, and rice fields. The magnitude of surface runoff, the decrease in lateral flow (interflow), water yield, and the reduction in infiltration processes increased the fluctuations in Qmax (m3/s), Qmin (m3/s), and the flow regime coefficient (KRA) in the Tiworo watershed.