scholarly journals APPLYING NUMERICAL MODEL TO ASSESS ROLE OF MANGROVE FOREST IN WAVE ATTENUATION IN HAI PHONG COASTAL AREA

2015 ◽  
Vol 15 (1) ◽  
Author(s):  
Vu Duy Vinh
Keyword(s):  
Numerical Model ◽  
Coastal Area ◽  
Mangrove Forest ◽  
Wave Attenuation

A THREE-DIMENSIONAL NUMERICAL MODEL FOR SELECTIVE WITHDRAWAL IN COASTAL AREA

2018 ◽  
Vol 74 (5) ◽  
pp. I_571-I_576
Author(s):  
Yasuo NIIDA ◽  
Norikazu NAKASHIKI ◽  
Takaki TSUBONO ◽  
Shin’ichi SAKAI ◽  
Teruhisa OKADA
Keyword(s):  
Numerical Model ◽  
Coastal Area ◽  
Three Dimensional ◽  
Selective Withdrawal

scholarly journals Microstructure and Electromagnetic Properties of Ni-Zn-Co Ferrite up to 20 GHz

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Charalampos Stergiou
Keyword(s):  
Wall Motion ◽  
Wave Attenuation ◽  
Domain Wall Motion ◽  
Electromagnetic Properties ◽  
Complex Permeability ◽  
Microwave Dielectric ◽  
Zn Ferrite ◽  
Spin Resonance ◽  
Production Stages

The present paper examines the relation between different developed microstructures and the microwave electromagnetic properties in Ni-Zn-Co ferrite. To this end, the Ni0.25Zn0.25Co0.5Fe2O4composition has been prepared with the conventional ceramic process with varied prefiringTP(750°C, 1000°C) and sinteringTStop temperatures (1200°C, 1250°C). When lower temperatures are applied in these production stages, incomplete microstructures with low density, higher porosity, or finer grains are achieved. On account of these features, the contributions of domain wall motion and spin rotation to the complex permeabilityμ⁎(f)move to higher frequencies, whereas microwave dielectric permittivityε⁎(f)is decreased. In particular in conjunction with the high Co content, the wall relaxation and spin resonance are interestingly forced to occur at 850 MHz and 8.05 GHz, respectively. Regarding the electromagnetic wave attenuation, the ferrite annealed at lower temperatures exhibits strong return loss peaks at higher frequencies, but without other performance improvement. We should notice that the variations in sintering temperatureTSyield the maximum changes in the recorded parameters, including the coercive field,μ⁎(f),andε⁎(f), indicating the inferior role of prefiringTPin Ni-Zn ferrite.

scholarly journals PERAN MASYARAKAT DESA SEJAHTERA DALAM PENGELOLAAN WISATA HUTAN MANGROVE DI KECAMATAN SUKADANA KABUPATEN KAYONG UTARA

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
. Wahyuti ◽  
Iskandar A M ◽  
Gusti Hardiansyah
Keyword(s):  
Mangrove Forest ◽  
National Park ◽  
Descriptive Analysis ◽  
Mangrove Forests ◽  
Community Needs ◽  
Implementation Evaluation ◽  
Village Community ◽  
Tourism Management ◽  
Analysis Technique

The community role is needed in the implementation of mangrove forest tourism management, especially in planning activities. The role of the community is the involvement of community itself in the development activities, both in the planning, implementation, evaluation, and the stages of esnjoying the results of the development itself. The purpose in this descriptive qualitative study was to determine the role of community in managing mangrove forest tourism in the subdistrict of Sukadana of Kayong Utara regency. Data collection techniques consist of observation, interviews, and documentation. While the analysis was carried out with descriptive analysis technique. The results of this study indicate that the role of of the sejahtera village community in managing mangrove forest tourism is limited to the maintenance of natural resources, maintenance of cleanliness and nursery of mangrove forests. Due to mangrove forest management is still fully managed by The Gunung Palung National Park Agency, the role of the community in the management of tourism in mangrove forests is still low. Therefore, the involvement of the surrounding community needs special attention and other related parties in utilizing mangrove forest tourism.Keyword: community role, mangrove forest, themanagement of mangrove tourism

scholarly journals Kepentingan Dan Peran Aktor Dalam Pengelolaan Hutan Mangrove Di Desa Pulau Pahawang Kecamatan Marga Punduh Kabupaten Pesawaran

2017 ◽  
Vol 5 (2) ◽  
pp. 113
Author(s):  
Iga Yulia Mustika ◽  
Asihing Kustanti ◽  
Rudi Hilmanto
Keyword(s):  
House Of Representatives ◽  
Mangrove Forest ◽  
National Level ◽  
Development Planning ◽  
Governmental Organizations ◽  
Non Governmental Organizations ◽  
Key Informant ◽  
Biodiversity Education ◽  
Fire Wood

Mangrove forest has physical, biological/ecological and social-economics functions. Mangrove forest at Pulau Pahawang Village, Marga Punduh, Subdistrict Pesawaran has many functions which causes many interest of actors. This research was aimed to identify and maping the role of actors interest. This research was conducted on August until October 2015, by using key informant namely agencies village, local communities, public figure, related department and Non-Governmental Organizations (NGO).             The result showed that there was six important aspect namely the existence of the green belt, kind of variety (biodiversity), education facilities, fire wood, non-timber forest product, and tourist facilities. Pulau Pahawang Village has three quadrant matrix interest, quadrant subject has State Ministry of The Environment. Quadrant keyplayers has Department of Forestry and Estate Crops, Mangrove Protected Area Management Agency (BPDPM), and Mitra Bentala as NGOs. Quadrant crowd has Development Planning Agency in Sub-National Level, Land Agency, Department of Maritime and Fisheries Affairs, Regional House of Representatives, and local. Keyword : actor interest, mangrove forest, Pulau Pahawang, role of actor

scholarly journals Role of microhabitats in food webs of benthic communities in a mangrove forest

2007 ◽  
Vol 340 ◽  
pp. 55-62 ◽  
Author(s):  
K Kon ◽  
H Kurokura ◽  
K Hayashizaki
Keyword(s):  
Food Webs ◽  
Mangrove Forest ◽  
Benthic Communities

scholarly journals Role of intertidal wetlands for tidal and storm tide attenuation along a confined estuary: a model study

2015 ◽  
Vol 3 (5) ◽  
pp. 3181-3224 ◽  
Author(s):  
S. Smolders ◽  
Y. Plancke ◽  
S. Ides ◽  
P. Meire ◽  
S. Temmerman
Keyword(s):  
Surface Area ◽  
Wave Attenuation ◽  
Spring Tide ◽  
Storm Surges ◽  
High Water ◽  
Water Levels ◽  
Storm Tide ◽  
Flood Risks ◽  
Model Study

Abstract. Coastal lowlands and estuaries are subjected to increasing flood risks during storm surges due to global and regional changes. Tidal wetlands are increasingly valued as effective natural buffers for storm surges by dissipating wave energy and providing flood water storage. While previous studies focused on flood wave attenuation within and behind wetlands, this study focuses on the effects of estuarine wetland properties on the attenuation of a storm tide that propagates along the length of an estuary. Wetland properties including elevation, surface area, and location within the estuary were investigated using a numerical model of the Scheldt estuary (Belgium, SW Netherlands). For a spring tide lower wetland elevations result in more attenuation of high water levels along the estuary, while for a higher storm tide higher elevations provide more attenuation compared to lower wetland elevations. For spring and storm tide a arger wetland surface area results in a better attenuation along the estuary up to a threshold wetland size for which larger wetlands do not further contribute to more attenuation. Finally a wetland of the same size and elevation, but located more upstream in the estuary, can store a larger proportion of the local flood volume and therefore has a larger attenuating effect on upstream high water levels. With this paper we aim to contribute towards a better understanding and wider implementation of ecosystem-based adaptation to increasing estuarine flood risks associated with storms.

On the role of fluid infiltration into gravel dunes — Using a 3D numerical model

2016 ◽  
Vol 380 ◽  
pp. 231-244 ◽  
Author(s):  
Gerhard Bartzke ◽  
Lina Podszun ◽  
Katrin Huhn
Keyword(s):  
Numerical Model ◽  
Fluid Infiltration ◽  
3D Numerical Model
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