Abstrak Penelitian ini dilakukan untuk mengidentifikasi penggunaan lahan pada DAS Air Dingin bagian hulu di Kota Padang berdasarkan tingkat bahaya erosi dan arahan konservasi. Metode penelitian yang digunakan untuk mengetahui tingkat bahaya erosi ditentukan berdasarkan rumus Universal Soil Loss Equation (USLE) dan arahan konservasi mengacu pada modifikasi dari Kumajas (1992). Hasil penelitian menunjukan bahaya erosi sangat ringan yaitu 5.93 ton/ha/tahun dengan luas 58.61 ha, erosi ringan yaitu 43.9 ton/ha/tahun dengan luas 24.49 ha, erosi sedang yaitu 181.64 ton/ha/tahun dengan luas 3.91 ha, dan erosi berat yaitu 74.91 ton/ha/tahun dengan luas 4.33 ha. Sedangkan arahan konservasi pada erosi sangat ringan dibiarkan dalam keadaan alami, erosi ringan dilakukan dengan pembuatan teras bangku, erosi sedang dilakukan dengan rotasi tanaman dengan teras berdasarkan lebar (pemanfaatan mulsa), dan erosi berat dilakukan dengan teras bangku (penggarapan dengan tenaga manusia).Kata Kunci: Erosi, Konservasi, DAS, Air Dingin bagian hulu, Kota Padang Abstract This research was conducted to identify the land use on the upstream part of Air Dingin Watershed in Koto Tangah Sub-district, Padang City based on the level of erosion and conservation directives. The method used to determine the level of erosion is determined based on Universal Soil Loss Equation (USLE) formula and conservation directives refers to the modification by Kumajas(1992). The results showed very mild erosion is 5.93 tons/ha/year with an area of 58.61 ha, mild erosion is 43.9 tons/ha/year with an area of 24.49 ha, moderate erosion is 181.64 tons/ha/year with an area of 3.91 ha, and heavy erosion is 74.91 tons/ha/year with broad 4.33 ha. While conservation directives on very mild erosion were left in a natural state, mild erosion is performed with a bench terracing, moderate erosion is being done by crop rotation with a terrace based on a width (mulsa utilization), and heavy erosion is done with a bench porch (cultivating with human labour).Keywords: Erosion, Conservation, Watershed, Upstream Part of Air Dingin, Padang City
Padang city is one of the most vulnerable areas of an earthquake potentially tsunami on the west coast of Sumatra Island. The government should formulate policies to minimize the impact of the disaster. The government and all relevant stakeholders should focus on disaster risk reduction efforts. As part of this effort is making policy in formulating contingency plans to deal with tsunami risk. Padang City Government has developed a contingency plan on tsunami risk since 2013 as a form of public policy. Even though the tsunami has not occurred in Padang City yet, but as a form of evaluation of this policy, it is necessary to analyze the problems in developing the contingency plan of the tsunami for the improvement of its future. Therefore, this article describes the results of the review of problem analysis in the policy of composing tsunami contingency plans in Padang City.
The purpose of calculation and compiling the Land Cover Quality Index (LCQI) is to evaluate the value of natural and environmental resources based on land cover conditions in an administrative region such as city, regency and province in Indonesia referring to the Regulation Director General of Pollution Control and Environmental Damage Number P.1/PPKL/PKLA.4/2018. The analytical method used in the calculation of the Normalized Difference Vegetation Index (NDVI), the Maximum likelihood classification approach, and the preparation of LCQI calculation methods based on 1) sufficiency area (forest region) and forest cover at minimal 30% on rivers and islands; 2) Ability and suitability of land minimal 25%; and 3) a link with the direction of land use in urban areas of at minimal 30%. The results showed the vegetation density index value in Pariaman city was classified as a good category with a value of 0.474903 μm, the results of a land cover classification in Pariaman City with the largest region are found in mixed gardens land of 2,736.57 ha or 37%. Whereas the smallest region is found in cypress vegetation land as a greenbelt at the coastal border 12.06 ha or 0,16%. and the results of the LCQI calculation indicate the LCQI value in 2019 (24,06) which is in the alert classification (<50). The increase in land cover outside the forest region is mainly directed at increasing green open space because Pariaman City does not have natural forest which are vulnerable to changes in land cover because of its high population density
Permasalahan banjir pada daerah sekitar aliran sungai Batang Tapan hampir setiap tahun terjadi terutama pada saat puncak musim hujan. Nagari Binjai Tapan merupakan wilayah langganan banjir di Kecamatan Ranah Ampek Hulu Tapan. Pemerintah nagari berperan besar untuk memberikan informasi kepada masyarakat terutama tentang informasi kerentanan terhadap bahaya banjir. Pemanfaatan teknologi informasi merupakan sebuah kebutuhan bagi aparatur pemerintahan untuk memudahkan dan mempercepat penyebaran informasi bagi masyarakat yang lebih luas. Pelatihan Pemetaan bencana akan dilakukan menggunakan teknologi geospasial yang juga sudah digunakan oleh sebagian besar masyarakat seperti GPS Mobile Phone. Seluruh informasi akan disimpan dalam sistem informasi geografi (SIG). Metode dan pendekatan dalam pelatihan ini adalah Pengenalan alat, penggunaannya dan evaluasi. Hasil kegiatan dapat diperoleh data bahwa sebagian besar perangkat nagari belum pernah menggunakan aplikasi pemetaan, baik yang sudah tersedia pada perangkat smartphone maupun yang bisa diakses secara gratis di internet. Hasil pelatihan menambah pengetahuan dan kemampuan perangkat nagari dalam menggunakan aplikasi pemetaan dalam pembuatan peta dan informasi bencana banjir di Nagari Binjai Tapan.
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