Floods are natural disasters that need attention because they threaten people's lives and economies. Samarinda is the capital city of East Kalimantan, one of the cities that is always plagued by flood problems. The purpose of this study was to determine how much influence the knowledge and attitudes about the risk of floods have on the preparedness of the head of the family in facing flood disasters. The population in this study was 735 households in the Sempaja Timur village, North Samarinda district, Samarinda city, and the sample was 199 households. This study uses a mixed-method that combines qualitative and quantitative approaches. The data instrument was taken using a questionnaire and analyzed with linear regression statistical analysis, and F-test statistical test. The results showed that there was a significant influence of knowledge and attitudes on the level of family head preparedness in facing floods in East Sempaja Village. This is proven in the multiple linear regression equation: Y = 10.282 + 0.243 X1 + 0.034 X2, and the results of the F-test with a significance level of α = 0.05 obtained a calculated F value of 8.031 and a P value of 0.000 <0.05, therefore knowledge and attitudes variable have simultaneous significant influences on the preparedness variable. The combined index of four parameters, namely knowledge and attitude, emergency response plans, resource mobilization and flood warning systems was 73.26. In the preparedness index classification, this number is in the ready category. This research is expected to give insight to the head of the family who is part of the community to increase awareness of the importance of knowledge and preparedness regarding flood disasters.
High strength concrete is very widely used today to support the construction of buildings, roads, dams, bridges and so on. To make high quality concrete, additional material is needed as a concrete mixture, the added material today is very much in the market as well as added ingredients derived from fly ash, and rice husk, especially rice husk is most widely used as a mixture in making concrete, due to the chemical content of SiO2 contained in rice husk ash. In this study we made high strength concrete using ash derived from waste paper. Paper ash was burned manually and then filtered using sieve number 150. Paper ash was then tested for its chemical content. The results of the chemical content test derived from paper waste ash have a CaO of 92.70 while SiO2 is only 2.63%. The making of test specimens was made as many as 90 pieces with some additional variations of noble ash from 0%, 5%, 10%, 15%, 20%, and 25%. Concrete compressive strength test results with a code of 0% could not achieve the quality plan of 45 MPa, while the addition of ash by 5% reached 41 MPa compressive strength more, the highest compressive strength produced by a mixture of 10% paper ash which achieved a compressive strength of more than 45 MPa plan. Whereas specimens with a mixture of 15%, 20%, and 25% produce concrete with compressive strength below 36 MPa. From the results of the study it can be concluded that the use of 5% and 10% waste paper ash can increase the compressive strength of concrete. Ash from paper waste can be an alternative material added to the concrete mixture.
Beton porus (porous concrete atau disebut juga pervious concrete) adalah material beton yang mempunyai kemampuan untuk mengalirkan air permukaan kedalam tanah dengan sangat cepat. Terbuat dari campuran air, semen dan kerikil dengan sedikit atau tidak memakai agregat halus sama sekali, beton porus mempunyai rongga yang saling berhubungan membentuk suatu saluran yang dapat mengalirkan air secara cepat. Pengabdian ini bertujuan sebagai perwujudan visi Teknik Sipil UMKT untuk solusi pembangunan perkerasan jalan beton yang berkelanjutan serta melatih masyarakat dalam membuat dan mengaplikasikan teknologi perkerasan beton porous di lingkungan masyarakat sekitar. Dengan menggunakan perkerasan beton porous solusi perkerasan beton berpori yang ramah lingkungan, dapat mencegah terbentuknya genangan air di permukaan serta membiarkan air terserap oleh tanah sehingga beban drainase berkurang dapat mengurangi kemungkinan terjadinya banjir pada badan Jalan di Gang Julak gafur Rt 04 Kel Sungai pinang Kota Samarinda. Pada pengabdian ini perkerasan porous beton didesain dengan tebal perkerasan 12 cm, tebal lapis bawah (base coarse) 7 cm, panjang jalan perkerasan 3 m dan rongga udara sebesar 30 persen yang diestimasikan dapat menampung air sebanyak 66 liter per meter persegi. Manfaat yang dapat diperoleh masyarakat dengan pelatihan ini adalah dapat menjadikan gang julak gafur sebagai percontohan aplikasi perkerasan beton porous di Kota Samarinda.
Permasalahan drainase di daerah Sempaja Utara Kota samarinda saat ini menghadapi problema yang cukup serius. Kondisi drainase yang ada banyak menghadapi berbagai masalah. Sebagai indikator dari permasalahan drainase antara lain adalah berupa banjir/ genangan baik yang bersifat lokal (setempat) atau yang bersifat lebih luas. Hal tersebut yang menimbulkan permasalahan di lingkungan permukiman, sarana prasarana transportasi dan prasarana publik yang lain sehingga dapat menyebabkan teragnggunya kegiatan ekonomi. Evaluasi kinerja sistem drainase dilakukan dengan membandingkan debit yang masuk dan kapasitas tampang saluran. Dalam analisis ini debit rencana diperoleh dengan menggunakan analisis hidrologi debit banjir kala ulang 10 tahunan untuk saluran sub makro sedang untuk saluran drainase mikro menggunakan debit banjir kala ulang 5 tahunan. Analisis hidrolika kapasitas tampang saluran dengan menggunakan persamaan Manning. Debit banjir rancangan ini menggunakan kala ulang 2, 5, 10, 20 dan 50 tahun dengan menggunakan metode distribusi gumbel hasil perhitungan untuk kapasitas awal saluran = 4,891 m3 /detik dan untuk debit banjir rancangan pada kala ulang 2 tahun 13,553 m3/detik, kala ulang 5 tahun 17,500 m3/detik, kala ulang 10 tahun 20,112 m3/detik, kala ulang 20 tahun 22,619 m3/detik, dan untuk kala ulang 50 tahun 25,863 m3/detik. Dari analisa diatas dapat kita simpulkan bahwa saluran drainase pada kawasan Jalan K.H Wahid Hasyim memerlukan perencanaan ulang kapasitas saluran, karena kapasitas saluran yang ada jika dibandingkan dengan debit banjir rancangan maka hasilnya minus atau kondisi sudah tidak aman dalam menampung debit banjir rencana kala ulang 2 tahun hingga seterusnya. Kata Kunci : evaluasi, drainase, debit rencana, kapasitas saluran
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