Assessment of infiltration rate in the Lawe Menggamat Sub-Watershed, Aceh Province, Indonesia

Abstract

The Lawe Manggamat sub-watershed has been degraded as indicated by the increasing frequency of flood events from year to year. This is related to the hampered infiltration process so that the volume of rainfall that enters the soil is getting smaller, on the other hand, the surface runoff tends to increase. This study aimed to determine the infiltration rate in the Lawe Menggamat sub -watershed, Aceh Province, Indonesia. This research uses a descriptive method (survey) which refers to the Land Map Unit (LMU) by considering the type of land use, soil type, and slope. Infiltration in the field was observed using a double-ring infiltrometer at 17 LMU. The results showed that the infiltration rate in the Lawe Menggamat sub-watershed consisted of 5 categories, namely: fast (LMU-1, LMU-8, and LMU-16), rather fast (LMU-2, LMU-3, and LMU-17), medium (LMU-6, LMU-7, and LMU-10), rather slow (LMU-4, LMU-5, LMU-9, LMU-11, and LMU-15), slow (LMU-12, LMU-13, and LMU-14)."The dominant factors affecting the infiltration rate are texture, C-organic, bulk density, soil type, and land use. Management of cover crops and organic matter, as well as forest and land rehabilitation, are expected to improve infiltration in these areas.

Landscape sensitivity-based scenario analysis using flus model: a case of Asarsuyu watershed

“…Although a basin is an ecosystem consisting of soil, water, vegetation and people, each basin has its own unique biophysical conditions with its land use types, soil structure, topography, climate, geology and geomorphology. Some changes in these characteristics may be a driving factor for degradation in the watershed (Basri & Chandra 2021). For instance, in areas with water infiltration before urbanization and population movement in the basin, it is seen that surface flow discharge increases with LUCC (Ophiyandri et al 2021).…”

“…Water infiltration is the main stage controlling the relationship between surface water and groundwater (Neris et al 2012;Ward and Robinson 1989). On the other hand, soil properties (Basri & Chandra 2021;Neris et al 2012;Cousin et al 2003), vegetation cover (de Almeida et al 2018Mehta et al 2008), geological structure (Karadağ 2019;Cousin et al 2003) play a very important role in this process. Also land cover significantly affects water infiltration (Carlesso et al 2011).…”

Floods and their problems: Land uses and soil types perspectives

“…Many researchers from all over the world report research related to infiltration and the factors that influence it. Infiltration rate studies that have been carried out in the province of Aceh, Indonesia [23], [24], [25] provide information that different soil types have different infiltration rates which are influenced by the characteristics of the soil. soil physical properties such as texture, organic matter, structure, and type of land use.…”

“…Several types of soil found on the island of Java, Indonesia with the main characteristics of each type of soil [31], [32], [33], [34] can be seen in Table 3. While the characteristics of soil types [23], [24], [25] in Aceh Indonesia can be seen in Table 4. Ultisol is a type of soil that has undergone advanced weathering which is characterized by the presence of an argillic horizon which has a high clay content.…”

Determination of Flood Susceptibility Index Using Overlay-Scoring Data Method based on Geographic Information System (GIS) in Semarang City, Central Java, Indonesia

“…This is because the soil surface has a lot of closed pores and lacks plant roots to absorb water (Wihaji et al, 2018). As a result, rainwater that falls to the earth's surface cannot infiltrate properly, so it pools on the surface (Basri et al, 2021). The volume of rainwater that is too large, indicates a greater chance of flooding in the area (Kundzewicz et al, 2019;Marengo et al, 2020).…”