The change of land use patterns and cover on the surface runoff in Krueng Meuraksa sub-watershed

Abstract

The increasing population and the development of Lhokseumawe city from 2008-2018 resulted in changes in land use, therefore the type of land cover will be a benchmark for how much the surface run-off will occur. In this study there are six categories of land use types, thus are shrubs, plantations, settlements, open land, dryland farming and rice field. Krueng Meuraksa sub-watershed is in Lhokseumawe, North Aceh Regency, Aceh Province. The area of Krueng Meuraksa sub-watershed is 9,958.56 ha. This study aims to observe how the pattern of land use change and run-off in 2008-2018. This study uses secondary data collection methods obtained from related resources. The result shows that there is a change in land use where the area of land cover continues to increase in the residential area, on the contrary the area of land cover continues to decrease in dryland farming area. These changes lead to an increase in the coefficient of surface run-off in Krueng Meuraksa sub-watershed in 2008-2018, where in 2008 it was 0.726 and in 2018 it was 0.787. Based on the run-off coefficient, rainfall intensity and sub-watershed in Krueng Meuraksa, the amount of run-off was 333.403 m3/d in 2008 and 361.765 m3/d in 2018. The increase in the amount of run-off occurs as the run-off coefficient increases every year.