scholarly journals Tingkat Bahaya Longsorlahan di Sub DAS Ngrancah Kabupaten Kulonprogo

2021 ◽  
Vol 22 (1) ◽  
pp. 75
Author(s):  
Wildhan Dayu Hardhoni ◽  
Suratman Suratman ◽  
Djati Mardiatno
Keyword(s):  
Layer Parameter ◽  
Middle Stream

Indonesia merupakan negara yang memiliki intensitas kebencanaan yang tergolong tinggi, termasuk bencana alam seperti longsorlahan. Dalam catatan BNPB diketahui bahwa selama tahun 2020 tercatat 573 kejadian longsorlahan. Pada wilayah Provinsi Daerah Istimewa Yogyakarta khususnya wilayah Sub DAS Ngrancah yang terletak di Kabupaten Kulon Progo juga terjadi beberapa kejadian longsorlahan. Oleh karena itu untuk meminimalisir kejadian maupun kerugian akibat longsorlahan perlu dilakukan penelitian yang membahas tentang tingkat bahaya longsorlahan. Penelitian ini memiliki tujuan yaitu menganalisis tingkat bahaya longsorlahan dan persebaran tingkat bahaya longsorlahan berdasarkan zonasi Sub DAS Ngrancah. Data yang digunakan adalah data skunder yang diperoleh dari beberapa instansi pemerintahan sedangkan metode untuk analisis menggunakan tumpeng tindih antar layer parameter dan skoring pada setiap parameter yang digunakan. Hasil penelitian menunjukkan bahwa terdapat tiga tingkat bahaya yang tersebar di wilayah Sub DAS Ngrancah yaitu sedang (74 satuan lahan), cukup tinggi (380 satuan lahan) dan tinggi (155 satuan lahan). Sedangkan persebaran tingkat bahaya longsorlahan cukup tinggi dan tinggi sebagian besar tersebar di wilayah zona hulu (upper stream) dan zona tengah (middle stream). Diharapkan hasil penelitian ini dijadikan sebagai salah satu referensi semua stakeholders dalam pengelolaan wilayah Sub DAS Ngrancah sesuai dengan kemampuan lahan itu sendiri.

Analisis Keragaman Tanaman Sebagai Jasa Lingkungan Pada Lanskap Agroforestri di Daerah Aliran Sungai Krueng Aceh

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Zulkifli Aiyub Kadir ◽  
Bahagia Bahagia
Keyword(s):  
Water Conservation ◽  
Vegetation Structure ◽  
Swot Analysis ◽  
Diversity Index ◽  
Middle Stream ◽  
Land Management System ◽  
Study Sites ◽  
Aleurites Moluccana ◽  
Lansium Domesticum ◽  
Agroforestry Practices

<p>Humans have utilized landscape for  produces a diverse character of the wider area of the watershed. Agroforestry is a land management system in addressing the problems that arise due to changes in land use of soil and water conservation. The aim of the study was to analyze plant diversity in agroforestry practices that have services in the Krueng watershed landscape in Aceh watershed. Develop strategies in the Krueng Aceh DAS agroforestry service. This research was conducted in the upper, middle and downstream of the Krueng Aceh watershed, with a rapid method of Agro-Biodiversity Appraisal and SWOT. The results showed that the composition of the vegetation structure found in the study sites tended to vary with the diversity index of agroforestry that was currently in the upstream and middle of the Krueng Aceh watershed. Based on SWOT analysis, internal scores are 2.45 and external scores are 3.21. Agroforestry practices in the upper stream of Krueng Aceh watershed were dominated by <em>Aleurites moluccana</em>, <em>Areca cathecu</em>, and  <em>Averrhoa bilimbi</em> L  species with the highest INP in the upper stream of Krueng Aceh watershed. Vegetation at the middle stream of Krueng Aceh watershed dominated by <em>Areca cathecu,</em> <em>Lansium domesticum</em> and Musa<em> paradisiaca</em>.  </p>

scholarly journals Evaluation of Shear Horizontal Surface Acoustic Wave Biosensors Using “Layer Parameter” Obtained from Sensor Responses during Immunoreaction

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4924
Author(s):  
Koji Kano ◽  
Hiromi Yatsuda ◽  
Jun Kondoh
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Horizontal Surface ◽  
Propagation Characteristics ◽  
Viscosity Change ◽  
Layer Parameter ◽  
Antibody Reaction ◽  
Antigen Antibody ◽  
Shear Horizontal ◽  
Molecular Dimensions

Shear horizontal surface acoustic wave (SH-SAW) biosensors measure the reaction of capture antibodies immobilized on the sensing surface to capture test molecules (antigens) by using the change in SH-SAW propagation characteristics. SH-SAW displacement exists not only on the SH-SAW propagating surface, but also partially penetrates the specimen liquid to a certain depth, which is determined by the liquid properties of the specimen and the operating frequency of the SH-SAW. This phenomenon is called viscosity penetration. In previous studies, the effect of viscosity penetration was not considered in the measurement of SH-SAW biosensors, and the mass or viscosity change caused by the specific binding of capture antibodies to the target antigen was mainly used for the measurement. However, by considering the effect of viscosity penetration, it was found that the antigen–antibody reaction could be measured and the detection characteristics of the biosensor could be improved. Therefore, this study aims to evaluate the detection properties of SH-SAW biosensors in the surface height direction by investigating the relationship between molecular dimensions and SH-SAW propagation characteristics, which are pseudo-changed by varying the diameter of gold nanoparticles. For the evaluation, we introduced a layer parameter defined by the ratio of the SH-SAW amplitude change to the SH-SAW velocity change caused by the antigen–antibody reaction. We found a correlation between the layer parameter and pseudo-varied molecular dimensions. The results suggest that SH-SAW does not only measure the mass and viscosity but can also measure the size of the molecule to be detected. This shows that SH-SAW biosensors can be used for advanced functionality.

Methodology for developing a combined technological process based on modifying the properties and changing the surface layer parameter

2020 ◽  
pp. 24-31
Author(s):  
V.N. Gadalov ◽  
E.A. Filatov ◽  
A.V. Filonovich
Keyword(s):  
Surface Layer ◽  
Technological Process ◽  
Acoustic Properties ◽  
Scientific Concept ◽  
Regulatory Documents ◽  
Layer Parameter ◽  
Metal Microstructure ◽  
System Errors

The article reveals information links between acoustic properties and parameters of the metal microstructure. A large number of regulatory documents and a lack of scientific concept lead to the system errors when estimating condition of both longterm operating metal and the product in the whole. The article considers methodology for developing a combined technological process based on modification of properties and change of the coatings' surface layer parameters, with an estimation of their efficiency in terms of productivity based on the criterial use of productivity principles. The analysis of technological activities for the productivity coefficient and the criterial estimates confirmed their efficiency.

On the LoRa performances under different physical layer parameter selection

2020 ◽  
Author(s):  
Yassine Yazid ◽  
Imad Ez-Zazi ◽  
Mounir Arioua ◽  
Ahmed EL Oualkadi
Keyword(s):  
Physical Layer ◽  
Parameter Selection ◽  
Layer Parameter

X-ray investigation of strained epitaxial layer systems by reflections in skew geometry

2017 ◽  
Vol 50 (2) ◽  
pp. 475-480 ◽  
Author(s):  
Peter Zaumseil
Keyword(s):  
Complex Analysis ◽  
Reciprocal Lattice ◽  
Angular Divergence ◽  
Reciprocal Space Mapping ◽  
Reciprocal Lattice Point ◽  
Optical Elements ◽  
Diffraction Curve ◽  
X Ray ◽  
Layer Parameter ◽  
Layer Structures

Four different SiGe/Si layer structures, pseudomorphically grown and (partially) relaxed, are used as examples to demonstrate that reflections in symmetric skew geometry can successfully be used to realize a complex analysis of these systems. Taking the intensity exactly along the truncation rod of a reciprocal lattice point, it is possible to simulate this diffraction curve and determine the layer parameter in the projection according to the netplane tilt relative to the surface. The main precondition for this technique and for performing reciprocal space mapping with sufficiently high resolution is a low angular divergence of the incident and detected beams perpendicular to the diffraction plane, which can also be achieved by suitable optical elements on laboratory-based diffractometers.

scholarly journals Algoflora of the Zarafshan River middle stream and its relationship with indicator-saprobic species

2016 ◽  
Vol 5 (2) ◽  
pp. 63-66
Author(s):  
Yigitali Shawkatillaevich Tashpulatov
Keyword(s):  
Water Pollution ◽  
Environmental Conditions ◽  
River Channels ◽  
Saprobic Index ◽  
Industrial Areas ◽  
Middle Stream

The author studies taxonomic, floristic, comparative, ecological and indicator-saprobiс features of algoflora of the Zarafshan River middle stream. The study was conducted at 10 observation points located along the river. These points are selected by location of such polluting sources as river channels, large reservoirs, sewage domestic, industrial areas and major cities. It is revealed that in the river there are 331 species and varieties of algae. They belong to 81 genus, 38 families, 16 orders, 11 classes and 5 departments. 97 species and varieties of these are an indicator-saprobic algae. The first three points of the environmental conditions are almost the same. In these areas 119 species and varieties are defined, 37 species of them are indicator-saprobic species. The middle saprobic index is 1.27; alpha-oligosaprob, class 2, category - 2b; the water is cleaner in 4-7 observation points of the river. Here 200 species are identified, 56 species of them are considered to be indicator-saprobic species. The middle saprobic index is 1.61; .beta.1-mezosaprob, class 3, category - 3a, the water is clean enough. In 8-10 observation posts only 125 species were found, 44 species of them are indicator-saprobic species. Middle saprobic index reached 1.84; beta.1-mezosaprob, class 3, category - 3a, the water is clean enough. Down the river stream the saprobic index, saprobic Educastional level of algae and water pollution gradually increases.

scholarly journals Analysis of total suspended solid content based on rain characteristics in the Ciliwung River basin

2020 ◽  
Vol 10 (3) ◽  
pp. 352-363
Author(s):  
Sulistyo Ariebowo Djajusman ◽  
Hadi Susilo Arifin ◽  
Etty Riani
Keyword(s):  
Regression Analysis ◽  
Multiple Regression Analysis ◽  
Multiple Regression ◽  
Correlation Coefficient ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
Solid Content ◽  
Rainfall Characteristics ◽  
Middle Stream ◽  
The Relationship

Total suspended solid (TSS) is one of the parameters that determines whether or not a body of water is polluted. One factor that influences the amount of TSS content is the characteristic of rainfall in an area. Purpose of this study was to determine the relationship between the effect of rainfall characteristics and TSS content in Ciliwung River. Multiple regression analysis was used for analytical method.  Results of multiple regression analysis showed that the correlation coefficient (adjusted R2) for the factors of rainfall, discharge and sediment show a low correlation to changes the content of TSS in Ciliwung River. The value of each correlation coefficient in the upstream, middle, and downstream of Ciliwung River are 0.21, 0.31, and 0.09 respectively. According to the F test, rainfall, discharge and sediment  were significantly affect TSS content in the upstream and middle stream.  Based on t test, it is known that only rainfall affect TSS content in the upstream and midlle stream.

scholarly journals Keanekaragaman Jenis Ikan di Sepanjang Sungai Boyong – Code Propinsi Daerah Istimewa Yogyakarta

2016 ◽  
Vol 1 (1) ◽  
pp. 21 ◽  
Author(s):  
Tri Trijoko ◽  
Donan Satria Yudha ◽  
Rury Eprilurahman ◽  
Setiawan Silva Pambudi
Keyword(s):  
Fish Fauna ◽  
Native Fish ◽  
Fish Diversity ◽  
Sampling Area ◽  
Anabas Testudineus ◽  
Merapi Volcano ◽  
Starting Point ◽  
Introduced Fishes ◽  
Middle Stream ◽  
Channa Striata

The diversity of freshwater fishes which inhabit in the river of Daerah Istimewa Yogyakarta is not yet well documented. Complete documentation is needed as starting point and continuous research on the fish diversity in DIY. Boyong-Code River flows across the DIY, and it upstream is located on the hillside of Merapi volcano. The Code River upstream is called Boyong River. The research was aimed to acquire data about the diversity of fish fauna along the Boyong-Code River in the DIY. Further, the research purpose is to know which species are rare, potential for aquaculture, and introductive. Samples are taken along the Boyong-Code River starting from upstream to downstream. Samples were collected using Purposive Random Sampling methods with fishnets. Sampling area generally divided into three location i.e., upstream, middle-stream and downstream. Species diversity of fish in the Boyong-Code River is consisted of 24 species, with 5 introductive species. There are eleven native fish species which are potential for cultivation (aquaculture), i.e.: Barbodes binotatus, Mystacoleucus obtusirostris, Rasbora lateristriata, Rasbora argyrotaenia, Barbonymus balleroides, Osteochilus vittatus, Hampala macrolepidota, Anabas testudineus, Channa striata, Clarias leiacanthus and Clarias batrachus. The Boyong-Code River is a decent habitat for fishes. Many introduced fishes starting to invade the Boyong-Code River intentionally or unintentionally by human

scholarly journals Performance of a groyne in controlling flow, sediment and morphology around a tributary confluence

2018 ◽  
Vol 40 ◽  
pp. 04006
Author(s):  
Kohji Michioku ◽  
Yuki Osawa ◽  
Keiichi Kanda
Keyword(s):  
Morphological Changes ◽  
Main Channel ◽  
Original Position ◽  
River Morphology ◽  
Excellent Performance ◽  
Middle Stream ◽  
Sedimentary Deposit ◽  
And Migration ◽  
Flood Flow

In a middle stream reach, irreversible morphological changes are observed such as growth of a huge sandbar in front of the confluence, thalweg migration from the left to right bank, erosion of the main channel and sedimentary deposit on the floodplain. As a countermeasure against such degradation of river morphology, a groyne was constructed beneath the tributary confluence. Performance of a groyne in controlling flood flow, sediment transport and river morphology was investigated by a twodimensional hydrodynamic model. The analysis on twenty years of morphological change indicates that the groyne has an excellent performance in improving quality of river morphology such as reduction of the sandbar development and migration of the thalweg to the original position.

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