Browsing by Author "Mustofa, Riyadi"

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    Analisis Potensi Erosi Daerah Aliran Sungai Galugur Kecamatan Kapur Ix Berbasis Sistem Informasi Geografis
    (wahyu sari yeni, 2019-01-03) Nurdin, Nurdin; Suprayogi, Imam; Sujatmoko, Bambang; Suwondo, Suwondo; Mustofa, Riyadi; Anggoro, Hafiz Catur
    Galugur Kapur IX Sub district watershed is one of the upper watersheds in the Kotopanjang hydropower reservoir which has the potential to trigger a reservoir sedimentation rate increasement due to land clearing for plantations so that it will speed up the filling of dead bin of reservoir significantly which will have an impact on the reduction of the planned service life of the reservoir. The research objective is to analyze the potential for erosion in the Galugur watershed using Geographic Information System (GIS) as an information of a watershed management policy. The research approach method for erosion estimation is the Universal Soil Loss Equation (USLE) method. The USLE method is influenced by four factors: rain erosivity factor (R), soil erodibility factor (K), downhill length and slope factor (LS), and land utilization factor (CP). These erosion estimation factors are then converted into four thematic maps, namely rain erosivity map (R), soil erodibility map (K), downhill slope and length map (LS), land cover and management map (CP). All thematic maps that have been generated are overlaid and will produce an erosion distribution map. The main results of the study proved that erosion that occurred in the Galugur watershed based on GIS was dominated by low category erosion approximately 43% of the total area of 5787,123 ha. Confirmed by the results of research that states that the Galugur watershed erosion product will blend with the water flow from the upstream to the reservoir, so that the sediment in the reservoirs will occur in large scale quantities. The reservoir sedimentations have the potential to be a threat to the reduction in the service life of the Kotopanjang hydropower reservoir which is designed to operate for 100 years.
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    Identifikasi Lahan Kritis Pada Daerah Tangkapan Air Waduk Plta Koto Panjang
    (wahyu sari yeni, 2019-01-03) Suwondo, Suwondo; Rahmat, Aan Nur; Mustofa, Riyadi
    Catchment Area has a hydrological function for the sustainability of the PLTA Koto Panjang Reservoir. As the number and activity of the Koto Panjang catchment area population increases, it has experienced hydrological pressure and land degradation. The study was conducted to identify the condition of critical land in the Koto Panjang catchment area. The research was conducted in the water catchment area of PLTA Koto Panjang in June-August 2018 using an overlapping approach using Geographic Information System application. The analysis is done descriptively. The results showed that the area of 329,305 ha of Koto Panjang hydropower catchment area, 32.8% classified as critical, 42.3% classified as critical potential, 19.6% classified as rather critical, 1.1% classified as very critical, 0.3% classified as not critical 0.3%. The criteria for the condition of critical land in this catchment area can be used as a reference for determining the priority location for the management of the Koto Panjang Hydroelectric Reservoir.
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    KOMPARASI JASA EKOSISTEM PENYEDIAAN DAN PENGATURAN DAERAH TANGKAPAN AIR WADUK PLTA KOTO PANJANG
    (2019-11) Mustofa, Riyadi
    Koto Panjang Reservoir Water Floods in the catchment area of the Koto Panjang Reservoir become an annual problem in the wet season resulting in interrupted access between regions, lackclean water, and the emergence of various diseases. Floods carry loads of mud, sand and other waste due to erosion in the upstream area which causes sedimentation in the downstream area. Erosion and sedimentation that occur due to nature's ability to regulate water continue to decrease due to land conversion. The research objective is to compare the carrying capacity of environmental services based on ecosystem services water supply services with water regulation services during the period 2003, 2007, 2011, and 2015. The carrying capacity of environmental services based on ecosystem services has an important role in supporting the lives of humans and creatures other life. Carrying capacity is one of the load indicators to ensure that a policy plan and program meets the requirements of sustainable development. The analytical method used was Participatory Approaches and Expert Opinion arranged into a pairwise comparison matrix and continued with quantitative descriptive analysis, comparative description, and spatial analysis. The results of the analysis in 2015 showed that the carrying capacity of environmental services based on ecosystem services water supply services was 29.49 with criteria already exceeded and water management services amounted to 76.15 with criteria not yet exceeded.