Hasil Pencarian  ::  Simpan CSV :: Kembali

"Kekeringan metorologis merupakan salah satu jenis kekeringan yang sulit diprediksi. Hal ini dikarenakan salah satu factor yang mempengaruhinya adalah perubahan intensitas curah hujan yang berhubungan langsung dengan perubahan iklim. Kekeringan di DAS Citarum Hulu merupakan suatu fenomena yang sering terjadi. Terdapat banyak factor yang mempengaruhi potensi bencana kekeringan meteorologis di DAS Citarum Hulu. Dalam Penelitian ini factor yang digunakan dalam menentukan potensi bencana kekeringan meteorologis di DAS Citarum Hulu antara lain, intensitas kekeringan, durasi kekeringan dan frekuensi kekeringan. Data yang digunakan dalam penelitian ini adalah curah hujan bulanan periode 1990-2020, penggunaan lahan tahun 2019, ketinggian, dan kelerengan. Metode yang digunakan dalam menentukan nilai kekeringan dalam penelitian ini adalah Standardized Precipitation Index (SPI) dan overlay. Analisis yang dilakukan dalam penelitian ini menggunakan analisis spasial dan temporal. Berdasarkan hasil analisis ditemukan bahwa persebaran potensi bencana yang dihasilkan dari tiga factor yang digunakan dalam penelitian ini tidak menunjukkan pola yang teratur. Di sisi lain wilayah potensi bencana dengan kelas sedang sampai dengan tinggi mendominasi dengan luas wilayah yang cukup besar nilainya. Keterkaitan antara potensi bencana kekeringan meteorologis dengan ketinggian, kelerengan, dan penggunaan lahan juga dapat dilihat. Dimana hasil yang dihasilkan adalah semakin tinggi suatu wilayah maka akan semakin tinggi juga nilai SPI nya dikarenakan nilai CH yang semakin meningkat, disisi lain kelerengan menunnjukkan keterkaitan dengan pola yang acak, dan penggunaan lahan yang paling berpotensi mengalami bencana kekeringan meteorologis di DAS Citarum Hulu adalah Pertanian.

---

Meteorological drought is one type of drought that is difficult to predict. This drought because one of the influencing factors is the change in rainfall intensity directly related to climate change. Drought in the Upper Citarum watershed is a phenomenon that often occurs. Many factors influence the potential for meteorological drought in the Upper Citarum watershed. In this study, the factors used in determining the potential for meteorological drought in the Upper Citarum watershed include drought intensity, drought duration and drought frequency. The data used in this study are monthly rainfall for the period 1990 – 2020, land use in 2019, elevation, and slope. The method used to determine the dryness value in this study is the Standardized Precipitation Index (SPI) and overlay. The analysis carried out in this study uses spatial and temporal analysis. Based on the analysis results, it was found that the distribution of potential disasters resulting from the three factors used in this study did not show a regular pattern.

On the other hand, the potential disaster areas with moderate to high class dominate with considerable value. The relationship between the potential for meteorological drought with altitude, slope, and land use. The result is that the higher an area is, the higher the SPI value will be due to the increasing CH value. On the other hand, slope shows a relationship with a random pattern, and the land use with the most potential to experience meteorological drought in the Upper Citarum Watershed is Agriculture. "

"Kekeringan pertanian merupakan dampak yang diterima tanaman akibat menurunnya ketersediaan air dan kelembaban lahan yang digunakan untuk keperluan pertanian. Berkurangnya intensitas hujan merupakan indikasi pertama terjadinya kekeringan pertanian sekaligus faktor penyebab utama penurunan hasil produksi lahan. Kabupaten Pandeglang adalah sumber lumbung padi Provinsi Banten yang mengalami kekeringan dalam kurun waktu lebih dari 10 tahun. Penelitian ini bertujuan untuk mengidentifikasi pola kekeringan tahun 2009 hingga 2019 dan menganalisis hubungan antara produktivitas padi dan curah hujan di wilayah yang sangat kering di Kabupaten Pandeglang. Metode yang digunakan dalam penentuan wilayah kekeringan adalah Normalized Difference Drought Index (NDDI) dengan menggunakan citra multitemporal LandSat. Metode uji regresi linear sederhana digunakan untuk mengetahui hubungan antara produktivitas padi dan curah hujan di wilayah kekeringan. Hasil dari penelitian ini adalah pola kekeringan pertanian di Kabupaten Pandeglang dari tahun 2009-2019 tersebar pada lahan sawah di dataran rendah bagian tengah hingga selatan. Pola kekeringan pertanian dominan berada pada rata-rata curah hujan 113,5-118,1 mm/bulan, jenis tanah alluvial, dan ketinggian 0-50 m dpl. Terdapat hubungan positif antara curah hujan dan produktivitas padi di wilayah kekeringan pertanian Kabupaten Pandeglang. Hal ini menandakan semakin tinggi curah hujan, maka produktivitas padi akan semakin meningkat. Namun demikian produktivitas padi di Kabupaten Pandeglang juga dipengaruhi oleh modal dan keterjangkauan wilayah.

---

Agricultural drought is the impact received by plants due to decreased availability of water and soil moisture used for agricultural purposes. The reduced rainfall intensity is the first indication of agricultural drought as well as a major contributing factor to the decline in land production. Pandeglang Regency is a source of rice granaries in Banten Province which has been experiencing drought for more than 10 years. This study aims to identify patterns of drought from 2009 to 2019 and analyze the relationship between rice productivity and rainfall in very dry regions in Pandeglang Regency. The method used in determining the drought area is the Normalized Difference Drought Index (NDDI) using the multitemporal LandSat image. Simple linear regression test method is used to determine the relationship between rice productivity and rainfall in drought areas. The results of this study are the patterns of agricultural drought in Pandeglang Regency from 2009-2019 are spread on lowland rice fields in the middle to the south. The dominant pattern of agricultural drought is in the average rainfall of 113.5-118.1 mm/month, alluvial soil types, and altitudes of 0-50 m above sea level. There is a positive relationship between rainfall and rice productivity in the agricultural drought area of Pandeglang Regency. This indicates the higher the rainfall, the productivity of rice will increase. However, rice productivity in Pandeglang Regency is also influenced by capital and regional affordability."

"One of the greatest affected factors towards the growth of V. radiata is consideret as the availability of water. Obviously, less production of V. radiata is due to short water supply...."

"Kekeringan selalu terjadi setiap tahunnya di Indonesia salah satunya yaitu di Kabupaten Sumba Timur yang berada di Pulau Sumba, Nusa Tenggara Timur. Penelitian ini bertujuan untuk mengetahui bagaimana pola sebaran kekeringan meteorologis dengan menggunakan metode Standardized Precipitation Index atau SPI sebagai indikator kekeringan berdasarkan variabel curah hujan dan kekeringan pertanian di Kabupaten Sumba Timur dengan menggunakan metode Normalized Difference Drought Index atau NDDI sebagai indikator kekeringan dalam pengolahan data citra satelit serta menganalisis bagaimana hubungan kekeringan meteorologis terhadap kekeringan pertanian di Kabupaten Sumba Timur. Hasil analisis pola sebaran wilayah kekeringan meteorologis berdasarkan nilai SPI dan nilai NDDI menunjukan pola sebaran kekeringan yang menyebar secara acak. Adapun kekeringan meteorologis berdasarkan nilai SPI bergerak dari wilayah selatan yang di dominasi oleh wilayah ketinggian dengan tingkat miring menuju ke wilayah tengah Kabupaten Sumba Timur sedangkan kekeringan pertanian berdasarkan nilai NDDI bergerak dari wilayah utara yang di dominasi oleh wilayah ketinggian dengan tingkat landai menuju ke wilayah tengah Kabupaten Sumba Timur. Berdasarkan kedua metode penentuan kekeringan tersebut didapatkan klasifikasi tingkat kekeringan dimulai dari kekeringan normal hingga ekstrim. Adapun untuk kekeringan meteorologis menunjukan beberapa wilayah mengalami kekeringan parah namun pada kekeringan pertanian menunjukan beberapa wilayah mengalami kekeringan ringan. Wilayah kekeringan meteorologis dan kekeringan pertanian yang terjadi pada tahun 2019 dan 2020 memiliki beberapa perbedaan sehingga hal ini dapat menunjukan bahwa belum adanya korelasi antara wilayah yang mengalami kekeringan meteorologis juga merupakan wilayah yang mengalami kekeringan pertanian.

---

Droughts always occur every year in Indonesia, one of which is in East Sumba Regency on Sumba Island, East Nusa Tenggara. This research aims to determine the distribution pattern of meteorological drought using the Standardized Precipitation Index or SPI method as a drought indicator based on rainfall and agricultural drought variables in East Sumba Regency using the Normalized Difference Drought Index or NDDI method as a drought indicator in processing satellite image data and analyze how meteorological drought is related to agricultural drought in East Sumba Regency. The results of the analysis of the distribution pattern of meteorological drought areas based on SPI values and NDDI values show a random distribution pattern of drought. Meanwhile, meteorological drought based on SPI values moves from the southern region which is dominated by high altitude areas with sloping levels towards the central region of East Sumba Regency, while agricultural drought based on NDDI values moves from the northern region which is dominated by high altitude areas with sloping levels towards the central region of the Regency. East Sumba. Based on the two methods of determining drought, a classification of drought levels is obtained starting from normal to extreme drought. As for the meteorological drought, it shows that several regions are experiencing severe drought, but the agricultural drought shows that several regions are experiencing mild drought. The areas of meteorological drought and agricultural drought that occurred in 2019 and 2020 have several differences, so this can show that there is no correlation between areas experiencing meteorological drought and also areas experiencing agricultural drought."

"El-Nino tahun 2019 menyebabkan penurunan curah hujan hingga kekeringan lahan yang menyebabkan puso di lahan pertanian. Penelitian ini bertujuan memodelkan kekeringan meteorologi, vegetasi, dan hidrologi di daerah terdampak kekeringan yaitu di Kabupaten Kebumen, Jawa Tengah. Kedua, memodifikasi model kekeringan dari Indeks Rawan Kekeringan (IRK) menjadi Indeks Rawan Kekeringan Regional (IRKR). Ketiga menganalisis spasial IRKR Kebumen dan membandingkannya degan hasil produksi padi. Tiga jenis kekeringan diekstraksi dari indeks penginderaan jauh yaitu Standardized Precipitation Index-3 (SPI-3), Vegetation Health Index (VHI), dan Soil Moisture Index (SMI) berbasis cloud computation Gooogle Earth Engine (GEE). Data yang digunakan adalah CHIRPS tahun 1981-2020, Landsat-8 tahun 2019 dan 2020, dan Citra Satelit Resolusi Tinggi (CSRT) Maxar 2019 dan 2020. Metodologi untuk mengkombinasikan tiga jenis kekeringan yaitu Multiple Criteria Analysis (MCA). Kekeringan meteorologi, vegetasi, dan hidrologi merepresentasikan kekeringan dari aspek curah hujan, stress vegetasi, dan kandungan air tanah dan permukaan. Model IRKR memodifikasi model IRK dalam hal data input, proses pengolahan, dan pembobotan variabel untuk level pemetaan kabupaten/kota dengan akurasi 84,6%. El-Nino menyebabkan kekeringan lebih luas mencapai 10.997 Ha di periode Nov-Des-Jan 2019 daripada 2020. Kekeringan mendominasi wilayah pesisir dengan bentuk lahan fluvio-marine pada sawah tadah hujan. Kekeringan menyebabkan penurunan luas panen tetapi tidak mempengaruhi hasil produksi padi.

---

The 2019 El-Nino caused a decrease in rainfall to land drought which caused puso in agricultural land. This study aims to model meteorological drought, vegetation, and hydrology in drought areas, namely in Kebumen Regency, Central Java. Second, modifying the drought model from the Drought Hazard Index (IRK) to the Regional Drought Hazard Index (IRKR). The third is to analyze the spatial IRKR of Kebumen and compare it with the yield of rice production. Three types of drought were extracted from the remote sensing index, namely Standardized Precipitation Index-3 (SPI-3), Vegetation Health Index (VHI), and Soil Moisture Index (SMI) based on cloud computing Gooogle Earth Engine (GEE). The data used are CHIRPS 1981-2020, Landsat-8 in 2019 and 2020, and Maxar High Resolution Satellite Imagery (CSRT) 2019 and 2020. The methodology for combining three types of drought is Multiple Criteria Analysis (MCA). Meteorological, vegetation, and hydrological droughts represent drought in terms of rainfall, vegetation stress, and soil and surface water content. The IRKR model modifies the IRK model in terms of data input, processing, and weighting variables for the district/city mapping level with an accuracy of 84.6%. El-Nino caused a wider drought reaching 10,997 Ha in the period Nov-Dec-Jan 2019 than 2020. Drought dominates coastal areas with fluvio-marine landforms in rainfed rice fields. Drought causes a decrease in harvested area but does not affect rice production.

"

"Kekeringan merupakan salah satu fenomena yang terjadi sebagai dampak sirkulasi musiman ataupun perubahan iklim global. Berdasarkan data dan informasi bencana Indonesia Badan Nasional Penanggulangan Bencana BNPB , Kabupaten Cilacap merupakan salah satu Kabupaten di Indonesia yang sering mengalami kekeringan parah. Penelitian ini bertujuan untuk mengetahui secara spasial bahaya kekeringan di Kabupaten Cilacap. Tingkat bahaya dihitung berdasarkan parameter fisik dari komponen keterpaparan dan sensitivitas dengan memanfaatkan Sistem Informasi Geografi dan dianalisis dengan menggunakan metode overlay. Tingkat bahaya dipengaruhi oleh distribusi curah hujan, tutupan lahan, dan lereng. Semakin ke utara, jumlah curah hujan semakin tinggi, dan di wilayah tersebut tingkat bahaya termasuk kategori rendah, dan berlaku sebaliknya.

---

Drought is one of the phenomena that occurs as the impact of seasonal circulation or global climate change. Based on Data and Information Disaster Indonesia BNPB, Cilacap Regency is one of the districts in Indonesia that often experience severe drought. This study aims to determine the spatial hazard of drought disaster in Cilacap regency.

The hazard level is assessed based on the physical parameters of exposure and sensitivity components by utilizing Geographic Information System and analyzed by using overlay method. The danger level is more affected by rainfall distribution. To the north, the amount of rainfall is higher, and in that area the danger level is low, and the other way."

"Kekeringan merupakan bencana yang setiap tahun terjadi pada musim kemarau, kejadian bencana kekeringan tidak terlepas dari fenomena iklim El-Nino Southern Oscillation (ENSO). Kekeringan dapat memberikan dampak negatif pada sektor pertanian lahan sawah yang berakibat penurunan luas tanam, luas panen, dan hasil produktivitas. Dinas Tanaman Pangan, Holtikultura, dan Perkebunan Kabupaten Bogor menyebutkan bahwa Kabupaten Bogor pada musim kemarau terkena dampak dari kekeringan pertanian. Tujuan dari penelitian ini adalah mendeteksi wilayah kekeringan secara spasial dan temporal, serta menganalisis wilayah kekeringan menurut kondisi topografi seperti ketinggian dan kemiringan lereng. Penelitian ini menggunakan data citra Landsat 8 OLI/TIRS pada tahun 2014-2018 dengan Normalized Difference Vegetation Index (NDVI) dan Normalized Difference Water Index (NDWI) lalu menghasilkan indeks kekeringan dengan analisis Normalized Difference Drought Index (NDDI). Hasil pengolahan diklasifikasikan menjadi 4 kelas yaitu normal, kekeringan ringan, kekeringan sedang, dan kekeringan berat. Berdasarkan dari pengolahan data tahun 2014, 2016, 2017, dan 2018 menunjukan bahwa kelas kekeringan ringan mendominasi di Kabupaten Bogor dan pada tahun 2015 didominasi kelas kekeringan sedang. Analisis statistik menunjukan kekuatan hubungan antara nilai NDDI dengan kondisi topografi yaitu ketinggian dan kemiringan lereng memiliki hubungan yang lemah dan tidak signifikan.

---

Drought is a disaster that occurs every year in the dry season, drought is inseparable from the climate phenomenon El-Nino Southern Oscillation (ENSO). Drought can have a negative impact on the agricultural sector of paddy fields which results in a decrease in planting area, harvest area, and productivity yields. Bogor Regency's Office of Food, Horticulture and Plantation said that Bogor Regency in the dry season was affected by agricultural drought.

The purpose of this study was to detect spatial and temporal areas of drought, and to analyze the area of ​​drought according to topographic conditions such as altitude and slope. This study uses Landsat 8 OLI / TIRS image data in 2014-2018 with the Normalized Difference Vegetation Index (NDVI) and the Normalized Difference Water Index (NDWI) then produces a drought index with an analysis of Normalized Difference Drought Index (NDDI).

Processing results are classified into 4 classes, namely normal, mild drought, moderate drought, and severe drought. Based on data processing in 2014, 2016, 2017, and 2018, it shows that light drought class dominates in Bogor Regency and in 2015 was dominated by moderate drought class. Statistical analysis shows the strength of the relationship between NDDI values ​​and topographic conditions, namely altitude and slope of the slope has a weak and non significant."

"Rice fields located in Citarum Hilir watershed of Karawang district are more and more affected by growth of residential and industrial areas. This resulted in the need to have supporting rice fields elsewhere including in the upstream region. ln Citarum Hulu watershed, 19,5% fiom the existing rice fields is non-irrigated with 32,l9% of population work in the agriculture sector. But productivity of' non-irrigated rice fields of Citanim Hulu watershed is still low, which is below 25 kwintal/ha. One of the efforts to increase its productivity is to look at the local climate model. The low productivity may also be caused by factors such as slope and altitude, which are used as variables in Wilayah Tanah Usaha (WTU). Sandy (1985) wrote that growth and death of any plant in Indonesia depend on water. Awarding to Chang (1968) every process in a plant is affected by water. Furthermore, FAO believed that the growth requirement of a rice plant is also depended on water availability. Mohr, Schimdt-Ferguson, and Oldeman made climate classifications based on rainfall in relation with plant needs of irrigation. Spatial climate model and planting time/season are important factors in management of non-irrigated rice fields in Citarum Hulu watershed. These rice fields are nou-unifonnly found in the center down to the south. Rice production varies from 22 to 4l kw/ha where the majority produces 30-40 kw/ha. Productivity model for the northem part is varied, and to the south is more stable with productivity of 30-40 kw/ha. The annual average rainfall in Citarum Hulu watershed is 1770-3458 mm/yr where the majority of the region has in the range of 2000-3000 mm/yr. Maximum monthly rainfall is 558 mm and a minimum of 6 mm on average. Rainfall is high in the months of November to April and dry period is fiom June to August. Mol-rr?s climate classification is around class III - Vb where the majority is in class III-IV. Schmidt-Ferguson?s climate classification for this area is type C to type A, where the majority is in the wet type (A). 0Ideman?s climate classification varies from D3 to Bl where the majority ofthe region is in climate group C-B (humid-wet). ln general, climate model for Citarum Hulu watershed is as follows: in the center (around the city of Bandung) is almost always drier than its surrounding areas, specifically in the northem and southem parts that are mountainous. The distribution of non-irrigated rice fields has a strong correlation with the annual rainfall model of Schimdt-Ferguson and Oldeman, because as an area has more precipitation there tend to be non-irrigated rice fields. But it is not true with Mohr climate. A strong correlation in productivity of non-irrigated rice fields with rainfall model, Mohr, Schmidt-Ferguson, and Oldeman climate models mean that as a region receives more precipitation then 'there is a tendency of higher rice productivity. But there is also a tendency that if an area is extremely wet, the productivity will decrease. Planting season in the Citarum Hulu watershed is from October and May with 4 planting time models: October/February, October/March, November/March, and December/April. In the November/March, planting time is dominant in almost all of the watershed area. Part of the non-irrigated rice fields in Citarum Hulu watershed are still according to the WTU conception, that is 65,87%, which the majority is in the center. As for the rest of this region, they should be converted into protected forest areas (especially in the south) and hard plant agriculture (in the cast). Keywords: DAS Citarum Hulu, non-irrigated rice fields, rainfall, climate model, Mohr, Schmidt-Ferguson, Oldeman, WTU conception, planting time."

"ABSTRAKPenelitian ini bertujuan untuk mengamati reaksi saham-saham yang tergabung dalam indeks LQ45 dengan peristiwa politik nasional. Penelitian ini berfokus kepada peristiwa politik khususnya pemilihan umum yang terjadi dalam rentang waktu 11 tahun antara tahun 2009 hingga 2019. Metode studi peristiwa digunakan dalam penelitian ini, dengan menggunakan panjang sebelas hari untuk periode event window, lima hari sebelum dan lima hari sesudah tanggal kejadian. Reaksi didekati dengan abnormal return yang signifikan selama periode event window. Hasil penelitian menunjukan berbagai signifikansi abnormal dari setiap peristwa politik.

---

ABSTRACT

This study aims to observe the reaction of stocks incorporated in the LQ45 index with national political events. This research focuses on political events, especially general elections that occur in the span of 11 years between 2009 and 2019. The event study method was used in this study, using eleven days for the event window period, five days before and five days after the date of the event. The reaction is approached with a significant abnormal return during the event window period. The results showed a variety of abnormal significance of each political event."