THE IMPACT OF THE SURFACE RUNOFF COEFFICIENT (C) ON LAND UTILIZATION
DOI:
https://doi.org/10.21837/pm.v23i35.1672Keywords:
Land usage, Runoff coefficient (C), Way Pubian watershed, Central Lampung, GISAbstract
Transformations in land use from undeveloped to built-up land can increase large surface runoff. This research aims to assess runoff coefficient (C) on changes in land utilization over various periods and times. The method used in this research involves analyzing changes in land use to determine the area of each type of land use over a specific period and then analyze the C value due to land changes. The results reveal that land use in the Way Pubian sub-watershed consists of pond, forest, open land, settlements, plantations, and rice fields area. In certain periods, land use changes, so that different C total value results are obtained in 2012, 2017 and 2022 periods. The C value is significantly affected by the type of land use, because the type of particular land use has different surface runoff coefficient values. The C value obtained from the 2012, 2017 and 2022 periods are close to 0, indicating that all rainwater that falls in the sub-watershed area are infiltrating the soil properly and therefore, land use is classified as good. It can be concluded that the value of the surface runoff coefficient (C) affects the magnitude of changes in land use within a certain period of time.
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