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Heri Tjahjono
Universitas Negeri Semarang
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APLIKASI PENGINDERAAN JAUH UNTUK ANALISIS PERUBAHAN PENGGUNAAN LAHAN TAHUN 2002-2011 DI DAERAH ALIRAN SUNGAI JUANA Susantl, Novi Ike; Sanjoto, Tjaturahono Budi; Tjahjono, Heri
Geo-Image Vol 1 No 1 (2012)
Publisher : Geo-Image

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Penduduk akan mengalami pertumbuhan setiap tahunnya, pertumbuhan tersebut akan mempengaruhi beberapa hal, antara lain kebutuhan yang harus tercukupi setiap harinya. Seperti pangan, sandang, dan juga kebutuhan akan lahan untuk tempat tinggal, tapi karena ketersediaan akan lahan terbatas menyebabkan terjadinya alih fungsi lahan atau perubahan penggunaan lahan. Penelitian ini menggunakan citra Landsat 7 tahun 2002 dan 2011. Populasi dalam penelitian ini seluruh DAS Juana, sampel 8 jenis penggunaan lahan yang bersumber dari BAPPEDA Kabupaten Pati. Untuk batas DAS Juana menggunakan data dari BPDAS PEMALI JRATUN. Hasil klasifikasi terbimbing didapatkan 8 jenis penggunaan lahan pada tahun 2002 dan pada tahun 2011 bertambah 1 penggunaan lahan menjadi 9 yaitu hutan, hutan produksi, tegalan, permukiman, sawah, tambak, kebun, tubuh air dan mangrove. Hasil uji keakuratan citra dihasilkan 88% dimana dari 100 titik sampel ditemukan 12 lokasi yang tidak sesuai. Sedangkan tinggkat kesesuaian antara penggunaan lahan dengan kawasan budidaya RTRW Kabupaten Pati tahun 2008, kawasan budidaya tambak yang hampir sesuai dengan jumlah presentase 81,36%, sedangkan pada hutan produksi, permukiman, tegalan, dan sawah memiliki tingkat kesesuaian <50%. Terakhir supaya diadakan monitoring secara intensif dalam pengelolaan DAS Juana dan RTRW Kabupaten Pati agar sesuai dengan apa yang sudah direncanakan.Population will grow each year, growth will affect several things, among others, need to be fulfilled every day. Such as food, clothing, and also the need for land for housing, but because of limited land availability will lead to land conversion or change of land use. This study used Landsat 7 in 2002 and 2011. The population around the watershed Juana, sample 8 types of land use are sourced from BAPPEDA Pati. For Juana watershed using data from BPDAS Pemali JRATUN. Supervised classification results obtained 8 types of land use in 2002 and in 2011 added up to 1 to 9 land use is forest, production forest, moor, settlements, fields, ponds, gardens, water bodies and mangroves. The accuracy of the test results generated imagery which 88% of the 100 sample points found 12 sites that do not fit. While tinggkat compatibility between land uses by Pati RTRW cultivated area in 2008, the aquaculture area that most closely matches the number of percentage of 81.36%, while in production forests, settlements, moor, and the field has a compliance rate of <50%. That was held last intensive monitoring in watershed management and spatial planning Pati Juana to match what is already planned.
KAJIAN TINGKAT KEMACETAN LALULINTAS PADA JARINGAN JALAN YANG MENJADI AKSES MASUK KOTA SEMARANG Siswanto, Agus; Putro, Saptono; Tjahjono, Heri
Geo-Image Vol 1 No 1 (2012)
Publisher : Geo-Image

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Penelitian ini bertujuan untuk mengetahui nilai volume lalu-lintas, mengetahui tingkat pelayanan jaringan jalan (LOS) pada ruas jalan masuk Kota Semarang dan mengetahui perbandingan kemacetan antara tiap titik pengamatan. Populasi dalam penelitian ini adalah ruas jalan yang menjadi akses masuk ke Kota Semarang dan memiliki tingkat kemacetan tinggi. Hasil penelitian ini menunjukkan volume kendaraan rata-rata dari tiap titik pengamatan yaitu Jalan Siliwangi 9233 SMP/jam, Jalan Kaligawe 8259 SMP/jam, Jalan Brigjend Sudiarto 8023/jam, dan Jalan Setiabudi 7761 SMP/jam. Tingkat kemacetan paling tinggi adalah Jalan Siliwangi antara jam 12.00-13.00 dengan nilai LOS 0,94 di hari Senin dan lokasi yang memiliki tingkat kemacetan paling rendah adalah pada Jalan Siliwangi dari jam 06.00-07.00 dengan nilai LOS 0,62 di hari Minggu. Lokasi penelitian yang memiliki tingkat kemacetan rata-rata tertinggi adalah pada Jalan Raya Kaligawe dengan nilai LOS 0,84 dan lokasi yang memiliki tingkat kemacetan rata-rata terendah adalah Jalan Setiabudi dengan nilai LOS 0,79. Kesimpulan dari penelitian ini adalah volume lalu-lintas rata-rata selama penelitian paling tinggi adalah pada ruas jalan Siliwangi dengan nilai 9233 SMP /hari, tingkat pelayanan jaringan jalan (LOS) paling rendah adalah jalan Raya Kaligawe dengan nilai 0,84 pada kelas D. Perbandingan tingkat kemacetan dapat dilihat pada Jalan Siliwangi 0,82, Jalan Kaligawe 0,84, Jalan Brigjend Sudiarto 0,82 dan Jalan Setiabudi 0,79.This study aims to determine the value of the volume of traffic, knowing the level of service roads (LOS) on the streets of Semarang go and find bottlenecks comparisons between each point of observation. The population in this study is the access road into the city of Semarang and have high levels of congestion. The results of this study showed an average traffic volume of each observation point the way Siliwangi 9233 SMP / h, road Kaligawe 8259 SMP / h, road Brigjend Sudiarto 8023/jam and Jalan Setiabudi 7761 SMP / hour. Congestion level is highest between the hours of 12:00 to 13:00 Jalan Siliwangi LOS value 0.94 on Monday and locations with the lowest level of congestion is on Jalan Siliwangi from 06:00 to 07:00 hours with the value of 0.62 LOS on Sunday. What research that has the highest average congestion is on the highway Kaligawe LOS value 0.84 and the location that has the lowest average congestion is the Way Setiabudi LOS value 0.79. The conclusion of this study is the traffic volume on average during the study was the high road to the value of 9233 Siliwangi SMP / day, the level of service roads (LOS) is the lowest highway Kaligawe the value 0.84 at grade D. Comparison of the level of congestion can be seen on Jalan Siliwangi 0.82, 0.84 Kaligawe Road, Jalan Jalan Brigjend Sudiarto Setiabudi 0.82 and 0.79.
ANALISIS JANGKAUAN PELAYANAN LOKASI MINIMARKET DI KECAMATAN GUNUNGPATI KOTA SEMARANG Kurniawan, Wisnu; Suroso, Suroso; Tjahjono, Heri
Geo-Image Vol 5 No 2 (2016)
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This study is based on the development of the mini region of the District Gunungpati uneven in its establishment. The total population of 75.910 inhabitants as consumers are scattered in 16 villages by the number of minimarkets many as 17 units, then on average each serve about 4,743 inhabitants minimarket.This study aimed: Knowing the level of suitability minimarket in Gunungpati sub-district. This research method is descriptive qualitative. Data analysis technique in this research is the analysis of data comparations. The object of this research is minimarkets in Gunungpati sub-district and traditional markets in Gunungpati. Data used include primary data questionnaires and surveys using GPS, while secondary data is the Gunungpati sub-district In Figures 2014, the data population, data on the number minimarket and data description of the area.The number of samples that are in two regions Gunungpati village and Sadeng village, with 40 respondents, ie 40 minimarket visitors taken from the questionnaire to Gunungpati sub-district’s resident.The results showed concordance rate in Gunungpati village categorized low with a score of 13, while for the Sadeng village also categorized low with a score of 14. Coverage area minimarket locations in the sub-district Gunungpati largely overlapping or overlapping with a minimum distance of 500 meters between a minimarket to the other minimarket. Establishment location minimarket adjusted with applicable government regulations that competition in the world economy is getting healthier and range of services do not overlap.
KAJIAN KERAPATAN VEGETASI HUTAN LINDUNG GUNUNG UNGARAN JAWA TENGAH TAHUN 2016 MENGGUNAKAN METODE INDEKS VEGETASI Lintang, Nuansa Chandra; Sanjoto, Tjaturahono Budi; Tjahjono, Heri
Geo-Image Vol 6 No 1 (2017)
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The research aims are to know the vegetation density level using vegetation index method of NDVI, SAVI, ARVI, DVI and RVI and to know the highest accuracy of vegetation index methods to determine the vegetation density in protected forest Mount Ungaran. The sampling method use purposive random sampling, with 82 sampel points. This research uses descrpitive research method. The first variable is vegetation density and the second ones is distribution and area produced by vegetation index transformations. The result of this research shows that the distribution and the area of classification results for each vegetation index transformation are different. There was little differenceof wide in the transformation of NDVI and SAVI is an area of 900 m2, equevalent to one pixel on the Landsat-8 imagery. Meanwhile classification generated by the transformation of ARVI, a lot of generating area is included dense classification, and the classification generated by the transformation of DVI and RVI is more a lot included rare classification. The confusion matrix shows NDVI transformation has the best accuracy with an overall accuracy percentage of 75,61%.
ADAPTASI MASYARAKAT TERHADAP BENCANA LONGSOR LAHAN BERDASARKAN TINGKAT KERAWANAN DI KECAMATAN BANYUMANIK KOTA SEMARANG Utami, Otty Damayanti; Tjahjono, Heri; Sriyono, Sriyono
Geo-Image Vol 6 No 1 (2017)
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This study aims to identify the distribution of vulnerable areas of landslide and assess the society adaptation towards landslides in Banyumanik Distric, Semarang. The population in this study whole units of the terrain and the people in the Banyumanik Distric. Sampling in this study use sampling area on 19 terrain units and 80 respondents who are determined using Dixon B. Leach. This study uses a scoring method for mapping vulnerable areas of landslide and descriptive percentage to determine the level of society’s adaptation to landslides. The results of the study explains that level of vulnerability index in Banyumanik District. The high level of landslide is 842,13 Hectares (27,23 %), intermediatte level is 308,66 hectares (9,98%), the low level is 1,058 hectares (34,21%), and the most low level is 883,80 Hectares (28,58%). The society conduct landslides adaptation according to their knowledge and experience. The classifier of society adaptation to landslides including three aspects: physical, economic, and social aspects.
HUBUNGAN TINGKAT PENGETAHUAN KONSERVASI LAHAN GAMBUT DENGAN TINGKAT PARTISIPASI PETANI DALAM UPAYA PENCEGAHAN KEBAKARAN LAHAN GAMBUT DI DESA GAMBUT JAYA KECAMATAN SUNGAI GELAM KABUPATEN MUARO JAMBI TAHUN 2017 Oktiana, Cichi; Tjahjono, Heri; Sriyono, Sriyono
Geo-Image Vol 6 No 2 (2017): Geo - Image
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Research purpose: 1) To know the level of farmer’s knowledge about peatlands conservation, 2) To know the level farmer’s participation in preventing peatlands fire, 3) To know the relation between the knowledge about peatlands conservation and the level of farmer participation in preventing peatlands fire. Population: 364 of farmers. 10% sample or 38 farmers who taken by proportionate area random sampling. The techniques in collecting data are test, questionnaire, observation and documentation. Descriptive analysis technique and product moment correlation are used in analysis the data. The result of the research are the level peatlands conservation knowledge and the level of farmer participation in peatlands fire prevention are included in medium category. The relation between the level of peatlands conservation knowledge and the level of farmer participation in peatland fire prevention is strong, where, r hitung 0,7802 > r table 0,468. Its means that the higher the knowledge of peatland conservation the higher the level of farmer participation in fire prevention.
Strategi Coping Nelayan Terhadap Perubahan Iklim Studi, Pada Masyarakat Nelayan di Kecamatan Tugu, Kota Semarang Jawa Tengah Alfi, Lailiyah; Juhadi, Juhadi; Heri, Tjahjono
Geo-Image Vol 7 No 1 (2018): Geo-Image
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The purpose of this research is, 1) knowing the phenomenon of climate change that affect the activities of fishermen in Tugu Sub-district, Semarang City. 2) identification the impact of climate change on fishermen community in Tugu Kota Semarang and 3) knowing coping strategy conducted by fisherman to climate change that happened in Tugu Sub-district Semarang City. The sampling technique in this research is simple random sampling. Data collection techniques used were observations, questionnaires, interviews, and documentation. Technique to data analysis used is descriptive analysis. The results showed that climate change in the coastal city of Semarang increasingly long. These changes include changes in wind speed, wave height, and rainfall. The impact felt by the fishermen is the change in the pattern of sea fishing , the cost of sea fishing increased 0 , 5 % and the change in catch decreased 10% . In addition, the three urban villages researched have the same coping strategy , which includes 4 aspects of coping strategy structural , economic, social and cultural.
Pemetaan Risiko Bencana Longsor Sebagai Upaya Penanggulangan Bencana di Kecamatan Tembalang Kota Semarang Fitriani, Nur; Heri, Tjahjono; Budi, Sanjoto Tjaturahono
Geo-Image Vol 7 No 2 (2018): Geo-Image
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This Research aims for knowing the level of landslide risk and for knowing how much knowledge of citizens, then to know how disaster management is done in Tembalang district, Semarang city. To create landslide risk map was based on the Regulation of the Head of National Disaster Management Agency Number 02, 2012, defined by Hazard, Vulnerability, an Capacity factors.In determining hazard, vulnerability, and capacity, each has sub factors to determine it along with the scores. Based on this research in Tembalang district, the villages have high level of risk are Jangli, Tandang, Sambiroto, Mangunharjo, Tembalang, Bulusan, Sendangmulyo, and Meteseh. In Tembalang district, most of the villagers already have the basic knowledge of landslide, and in their handling about landslide they used to build talud together.
Dampak Spasial Berdirinya Kawasan Industri Candi Terhadap Penggunaan Lahan di Wilayah Kecamatan Ngaliyan Kota Semarang Muntaman, Putra; Juhadi, Juhadi; Heri, Tjahjono
Geo-Image Vol 8 No 1 (2019): Geo-Image
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This study aimed to find out the spatial impact of the establishment of temple industrial area on the land use in Ngaliyan. Quantitative approach with spatial data processing, weighting and descriptive methods was used in this research. The establishment of industrial areas would make either positive impacts or negativer ones; it would require certain amountof land, so that land – use changes occurred, guava orchards transformed into industrial area. By knowing this industrial area development, some impacts could be decreased and its RTRW system(  administrative division) could be obeyed. The research results showed that the most significant land use in 2005 until 2015 was for industrial arears of 5.59 ha, and for the residential areas increased to 2.75 ha. As for the carrying capasity in Ngaliyan, it had a medium one so that it had a moderate interpretation as well; and the impacts of the land – use changes underwent some condition changes due to the development of industrial areas around the templen in the amount of -1,33 %.
PEMODELAN BANJIR DI SUB DAERAH ALIRAN SUNGAI BANJIR KANAL TIMUR KOTA SEMARANG Aprianto, Widhi Kurniawan; Sanjoto, Tjaturahono Budi; Tjahjono, Heri
Geo-Image Vol 8 No 2 (2019): Geo-Image
Publisher : Geo-Image

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/geoimage.v8i2.33608

Abstract

The increased frequency of floods that occurred in the East Flood Canal should be done prediction to reduce losses.With that case this study aims 1) To knowing the result of flood modelsin the East Flood Canal Sub Watersheed on 2, 5, 10, 25, 50, 100 and 200 years periodically. 2) Identify flood-prone areasbased on modelsin the East Flood Canal Sub Watersheed in Semarang City.The research used quantitative research methods, with the population is area in East Flood Canal Sub Watersheed. The analysis technique which was used unsteady-flow and HSS-SCS. In this study showed that main river of East Flood Canal Sub Watersheed has overflowed on 2 years up to 200 years periodically with a peak discharge volime 202,32 m3/sec in a 2 year periodically and 283,15 m3/sec in a 200 year periodically. Unsteady flow simulation showed that overflowed East Flood Canal occured in 8 Villages along the main river. The largest flood-prone area on Terboyo Kulon Village with 112 Ha distribution and followed by Tanjung Mas Village 107 Ha, due to tidal.
Co-Authors Abd Basith Mukhlas Abd. Rasyid Syamsuri Ahmad Dzulfiqar Aji, Halim Sukma Alfi, Lailiyah Alfi, Lailiyah Anak Agung Istri Sri Wiadnyani Ananto Aji Ananto Aji, Ananto Andin Irsadi Andriyanto, Mail Anifahtun Anisa, Ratna Dewi Anisa, Ratna Dewi Apik Budi Santoso Aprianto, Widhi Kurniawan Aprillia Findayani Astuti, Eni Ayu Budi, Sanjoto Tjaturahono Budi, Sanjoto Tjaturahono Dewi Liesnoor Setyowati Doni Doni Eka Anjar Sari, Eka Anjar Erni Suharini Eva Banowati Fahrudin Hanafi Fahrudin Hanafi, Fahrudin Fandi Yusuf Maldini, Fandi Yusuf Fauzi Firmanzah Galuh Sitoresmi, Galuh Hariyanto Hariyanto Indriyana, Tri Izza, Nida Sayyidatul J Juhadi Juhadi Juhadi Lestari, Rika Puji M Fikri Amrullah Mahdavikya, Muhdi Moch. Arifien, Moch. Moh Yasir Alimi Mohammad, Nezar Ely Mohammad, Nezar Ely Muntaman, Putra Muntaman, Putra Nina Rosiana, Nina Ninuk Sholikhah Akhiroh Novi Ike Susantl, Novi Ike Nuansa Chandra Lintang, Nuansa Chandra Nugroho Trisnu Brata Nur Elmanda, Nisrina NUR FITRIANI Nurul Fatimah Oktiana, Cichi Oktiana, Cichi Otty Damayanti Utami, Otty Damayanti Pradika Adi Wijayanto Pramono, Didi Putri, Dwi Utami Putri, Dwi Utami R Sugiyanto Rahma Hayati Riza Arifudin Safitri, Elvita Safitri, Elvita Saptono Putro Sari, Alifa Ambar Satya Budi Nugraha Sembiring, Rinawati Sianturrahman, Damar Siska, Sunia Elanda Sisna Yuliana Diah Utami Putri, Sisna Yuliana Diah Utami Siti Nurindah Sari Sriyono Sriyono Sunarko Sunarko suprapto, Mohammad Nur suprapto, Mohammad Nur Suroso Suroso Tjaturahono Budi Sanjoto Wijaya, Januar Wirasanti, Avionita Wisnu Kurniawan Wulansari, Ainun Hinggis Nur