Kurnia, Rina (2025) Pengukuran Laju Infiltrasi Tanah Dengan Menggunakan Double Ring Infiltration Di Kota Pekanbaru Kecamatan Marpoyan Damai. Other thesis, Universitas Islam Riau.

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Abstract

Natural disasters that frequently occur in urban areas are floods, which are difficult to predict because they occur without warning and with highly unpredictable periodicity over time, except in areas that are prone to annual flooding. Several factors significantly influencing flood disasters are based on: low-lying topography, high rainfall intensity, and poor soil infiltration capacity, leading to surface water runoff that overflows and causes drainage systems and river flow systems to be unable to accommodate the existing volume. Pekanbaru City is one of the capital cities in Riau Province that is regularly affected by flood disasters during the rainy season. According to the 2021 Indonesian Disaster Risk Index (IRBI) data, Pekanbaru City is classified in the high-risk flood zone category with a score of 34.16 and ranks 433rd out of 397 districts/cities across Indonesia. Specifically, the Marpoyan Damai sub-district is an area classified as a residential area, an educational zone, and a commercial and service area. The objective of this study is to determine the infiltration rate at each point in the Marpoyan Damai sub-district. The research method used was measuring the infiltration rate in the field and then combining it with the Horton method using a Double Ring tool. In addition to the observation method, another method used was determining land cover maps in each sub-district in Marpoyan Dami District. The results of the study show that the village of Sidomulyo Timur has a final infiltration rate of 6.76964 cm/hour, which is categorized as a moderately fast soil infiltration rate. The village of Tangkerang Barat has a final infiltration rate of 11.0964 cm/hour, which is also categorized as a moderately fast soil infiltration rate. Wonerejo Village obtained a final infiltration rate value of 10.5064 cm/hour, which is categorized as a moderately fast soil infiltration rate, Tangkerang Tengah Village obtained a final infiltration rate value of 12.6438 cm/hour, which is categorized as a fast soil infiltration rate, Maharatu Village obtained a final infiltration rate value of 10.9852 cm/hour, which is categorized as a moderately fast soil infiltration rate, Pemberhentian Marpoyan Village obtained a final infiltration rate value of 10.092 cm/hour, which is categorized as a moderately fast soil infiltration rate. In general, the soil in Marpoyan Damai Subdistrict has fairly good infiltration capacity, which has the potential to reduce the risk of groundwater seepage. However, Sidomulyo Timur Village has the lowest soil infiltration rate among all the points studied, namely 6.76964 cm/hour, although it is still in the “moderately fast” category. However, this value indicates relatively slower infiltration potential compared to other areas, making Sidomulyo Timur Village more prone to waterlogging and local flooding, especially during heavy rainfall and when drainage systems are suboptimal.

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