Tisen, Tisen
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Simulasi Arahan Penggunaan Lahan di DAS Limboto dalam Rangka Pengendalian Kekeringan Ayuba, Sri Rahayu; Nursaputra, Munajat; Tisen, Tisen
Majalah Geografi Indonesia Vol 33, No 2 (2019): Majalah Geografi Indonesia
Publisher : Fakultas Geografi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/mgi.37460

Abstract

Perubahan penggunaan lahan bisa dibilang kekuatan sosioekonomi yang paling meluas mendorong perubahan dan degradasi ekosistem (Wu, 2008). (Kodoatie, 2010) menyatakan bahwa, terganggunya siklus hidrologi telah menimbulkan “3 T” masalah klasik air “too much (yang menimbulkan banjir), “too little (yang menimbulkan kekeringan) dan “too dirty (yang menimbulkan pencemaran air). Berdasarkan data BNPB tahun 1979-2009 terdapat 8 kejadian kekeringan di Provinsi Gorontalo. Penelitian ini bertujuan (1) mengetahui tingkat kerentanan DAS Limboto terhadap kekeringan. (2) menyusun arahan penggunaan lahan pada DAS Limboto berdasarkan penentuan tingkat kerentanan kekeringan. (3) mengsimulasikan arahan penggunaan lahan dalam rangka pengendalian kekeringan di DAS Limboto. Penelitian ini dilaksanakan pada Daerah Aliran Sungai (DAS) Limboto dengan luas DAS 86412,6 ha. Metode yang digunakan adalah Metode SWAT (Soil and Water Assessment Tool) dengan menggunakan software ArcSwat yang terintegrasi SIG. Penelitian ini termasuk dalam penellitian non-eksperimen yakni dengan menggunakan pengamatan langsung di lapangan. Input data SWAT antara lain lereng, jenis tutupan lahan, iklim, dan jenis tanah. Analisis yang digunakan dalam menentukan kerentanan DAS terhadap kekeringan adalah dengan menggunakan Soil Moisture Deficit Index (SMDI) melalui parameter Soil Water (SW). Pada penelitian ini penggunaan output model SWAT melalui ArcSwat, telah mampu menggambarkan kondisi pasokan air pada DAS Limboto, yang secara keseluruhan telah termasuk dalam kategori “Rentan”. Dengan membandingkan luas area yang mengalami kekeringan pada sebelum dan setelah dilakukan simulasi/running arahan penggunaan lahan maka dapat disimpulkan bahwa selisih luas area DAS yang mengalami kekeringan dengan klasifikasi “Rentan” diperoleh 37.513,1 ha atau secara persentasi mengalami penurunan sebesar 43,4 % dari luas DAS.
EFEKTIFITAS GAYA MENGAJAR LATIHAN DAN RESIPROKAL TERHADAP HASIL BELAJAR SERVIS ATAS BOLA VOLI PADA SISWA DI SMP NEGERI 97 JAKARTA Tisen, Tisen; Mulyana, Mulyana; Mustafa, Mustafa
Jurnal Pendidikan Jasmani dan Adaptif Vol 1 No 01 (2018): Jurnal Pendidikan Jasmani dan Adaptif, Volume 1, No. 1, Mei 2018
Publisher : Program Studi Pendidikan Jasmani Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpja.v1i1.7224

Abstract

This study aims to find out which style is more effective between the teaching style of training and the reciprocal teaching style to the learning outcomes of the volleyball. In the respondents conducted the initial test and then followed by giving treatment in the form of learning with practice teaching style and reciprocal ending by giving the final test. For 6 weeks (12 meetings) Samples taken using Random Sampling of 30 samples. Instrument research using top service learning test results. Preliminary test data on volleyball on the training force and reciprocal style was obtained by standard error of difference between two mean (SE_ (MX-MY)) = 1.03, the value makes t_ (count) obtained = 0.321. Then the result of the calculation is tested with table on degrees of freedom (dk) = (N + N) -2 = (15-15) -2 = 28 and the level of α = 0.05 obtained the critical value t_table = 2,001. Thus t_count is smaller than t_table (0.321 <2.048). Based on the results of the analysis, H00 is accepted and H_1 is rejected or the hypothesis stating there is no difference between the initial test results of the volleyball service result in the exercise style group and acceptable reciprocal style. Thus it can be concluded that two groups to be given a volleyball service treatment using the exercise style and reciprocal style, each having the basic ability to serve the same top. The effectiveness of the teaching-learning style of the upper average service learning outcomes (M_D) = 6.86, the value of t_count of = 20.78. If compared with t_table, it turns out bigger than t-table of 2,145 on trust α = 0,05 and degrees free 14. Effectiveness of reciprocal teaching style to service learning outcomes on volleyball obtained average value M_D = 11,13 , T_count of 30.91. If compared with t_table it turns out that the result is bigger than t_table of 2.145 on trust α = 0.05 and degrees of freedom 14. The final test result data on volleyball in the group of training style and reciprocal style obtained standard error of difference between two mean (SE_ (MX-MY)) = 1.07, the value makes t_ (count) obtained by 4,265. Then the result of the calculation is tested with t_tabel on degrees of freedom (dk) = (N + N) -2 = (15 + 15) -2 = 28 and level a = 0.05 obtained the critical value t_table = 2.048. Thus t_count is greater than t_table (4,265> 2,048). It can be concluded that the teaching style of training and reciprocal is effective against the learning outcomes of volleyball at the students of SMP Negeri 97 Jakarta who follow the learning of pearl on the top service material. And the reciprocal teaching style is more effective than the teaching practice style of the students' learning outcomes on volleyball at SMP Negeri 97 Jakarta.