scholarly journals PILOT PROJECT SAND GROYNES DELFLAND COAST

2012 ◽  
Vol 1 (33) ◽  
pp. 128
Author(s):  
Roderik Hoekstra ◽  
Dirk-Jan R. Walstra ◽  
Cilia S. Swinkels
Keyword(s):  
Data Analysis ◽  
Field Data ◽  
Morphological Evolution ◽  
Model Performance ◽  
Pilot Project ◽  
Sediment Characteristics ◽  
Waves And Currents ◽  
Set Up ◽  
The Impact ◽  
Good Agreement

In October and November 2009 a pilot project has been executed at the Delfland Coast in the Netherlands, constructing three small sandy headlands called Sand Groynes. Sand Groynes are nourished from the shore in seaward direction and anticipated to redistribute in the alongshore due to the impact of waves and currents to create the sediment buffer in the upper shoreface. The results presented in this paper intend to contribute to the assessment of Sand Groynes as a commonly applied nourishment method to maintain sandy coastlines. The morphological evolution of the Sand Groynes has been monitored by regularly conducting bathymetry surveys, resulting in a series of available bathymetry surveys. It is observed that the Sand Groynes have been redistributed in the alongshore, mainly in northward direction driven by dominant southwesterly wave conditions. Furthermore, data analysis suggests that Sand Groynes have a trapping capacity for alongshore supplied sand originating from upstream located Sand Groynes. A Delft3D numerical model has been set up to verify whether the morphological evolution of Sand Groynes can be properly hindcasted. Although the model has been set up in 2DH mode, hindcast results show good agreement with the morphological evolution of Sand Groynes based on field data. Trends of alongshore redistribution of Sand Groynes are well reproduced. Still the model performance could be improved, for instance by implementation of 3D velocity patterns and by a more accurate schematization of sediment characteristics.

scholarly journals MEASUREMENT OF SEDIMENT SUSPENSION IN COMBINATIONS OF WAVES AND CURRENTS

1972 ◽  
Vol 1 (13) ◽  
pp. 55
Author(s):  
J. Kirkegarrd Jensen ◽  
Torben Sorenson
Keyword(s):  
Thin Layer ◽  
Concentration Profile ◽  
Field Data ◽  
Concentration Profiles ◽  
Sediment Suspension ◽  
Calculated Concentration ◽  
Waves And Currents ◽  
The Mean ◽  
Mean Concentration ◽  
Good Agreement

The paper describes a procedure for obtaining field data on the mean concentration of sediments in combination of waves and currents outside the breaker zone, as well as some results of such measurements. It is assumed that the current turbulence alone is responsible for the maintenance of the concentration profile above a thin layer close to the bottom, in which pick-up of sediments due to wave agitation takes place. This assumption gives a good agreement between field data and calculated concentration profiles.

scholarly journals Perkembangan Pariwisata Di Daya Tarik Wisata Pantai Berawa Kabupaten Badung

2019 ◽  
Vol 6 (2) ◽  
pp. 309
Author(s):  
I Made Dipadewanda ◽  
I Gusti Agung Oka Mahagangga
Keyword(s):  
Data Analysis ◽  
Data Collection ◽  
Data Reduction ◽  
Qualitative Data ◽  
Point Of View ◽  
Local Society ◽  
Analysis Technique ◽  
Collection Data ◽  
Set Up ◽  
The Impact

The research is conducted in Banjar Berawa/Desa Adat Berawa, nort Kuta district, Badung Regency. The study purposes to know the impact of tourism growth to the society consumptive pattern in Berawa. The technique of the data collection use direct observation technique to the location, interviewing for informan, I.E.Bendesa Adat Berawa, Klian Desa Berawa, Klian Dinas Berawa, Klian Subak Tibubeneng Village, Local society, and documentation by taking photos. The data are analysed by using qualitative data analysis technique which are working based on data, searching and finding pattern, getting interesting data and deciding the data that will be ssuced. The technique of informants assigmnen is purposive sampling which is assigning the sample by using particular consideration so, deserves to be a sample. The data analysis includes with collection data, reduction data, displaying data, conclusion and  verivication. The result of the study shows the society point of view to the aconomy establishmemt of educational aspec of the society which is getting increase, society in Banjar Berawa are also starting to enterpreneurship by set up abussiness such as homestay and laundy. The point of view of society to the customary order is the society seens strong with the wealth that they have. The society fulfill their family neededs by taking many kends of occupation.  Keywords :Impact, tourism, consumptionpattern, society

scholarly journals Using the Soil and Water Assessment Tool to Simulate the Pesticide Dynamics in the Data Scarce Guayas River Basin, Ecuador

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 696 ◽  
Author(s):  
Naomi Cambien ◽  
Sacha Gobeyn ◽  
Indira Nolivos ◽  
Marie Anne Eurie Forio ◽  
Mijail Arias-Hidalgo ◽  
...  
Keyword(s):  
River Basin ◽  
Assessment Tool ◽  
Model Development ◽  
Model Performance ◽  
Water Quality Monitoring ◽  
Freshwater Ecosystem ◽  
Set Up ◽  
The Impact ◽  
Water Assessment ◽  
Soil And Water

Agricultural intensification has stimulated the economy in the Guayas River basin in Ecuador, but also affected several ecosystems. The increased use of pesticides poses a serious threat to the freshwater ecosystem, which urgently calls for an improved knowledge about the impact of pesticide practices in this study area. Several studies have shown that models can be appropriate tools to simulate pesticide dynamics in order to obtain this knowledge. This study tested the suitability of the Soil and Water Assessment Tool (SWAT) to simulate the dynamics of two different pesticides in the data scarce Guayas River basin. First, we set up, calibrated and validated the model using the streamflow data. Subsequently, we set up the model for the simulation of the selected pesticides (i.e., pendimethalin and fenpropimorph). While the hydrology was represented soundly by the model considering the data scare conditions, the simulation of the pesticides should be taken with care due to uncertainties behind essential drivers, e.g., application rates. Among the insights obtained from the pesticide simulations are the identification of critical zones for prioritisation, the dominant areas of pesticide sources and the impact of the different land uses. SWAT has been evaluated to be a suitable tool to investigate the impact of pesticide use under data scarcity in the Guayas River basin. The strengths of SWAT are its semi-distributed structure, availability of extensive online documentation, internal pesticide databases and user support while the limitations are high data requirements, time-intensive model development and challenging streamflow calibration. The results can also be helpful to design future water quality monitoring strategies. However, for future studies, we highly recommend extended monitoring of pesticide concentrations and sediment loads. Moreover, to substantially improve the model performance, the availability of better input data is needed such as higher resolution soil maps, more accurate pesticide application rate and actual land management programs. Provided that key suggestions for further improvement are considered, the model is valuable for applications in river ecosystem management of the Guayas River basin.

scholarly journals Approximate methods for calculating the impact of a massive body on a plate lying on the base

2021 ◽  
Vol 2131 (3) ◽  
pp. 032083
Author(s):  
S A Rukhlenko
Keyword(s):  
Infinite Plate ◽  
Elastic Base ◽  
Ideal Incompressible Fluid ◽  
Normal Impact ◽  
Rigid Plastic ◽  
Approximate Methods ◽  
Plastic Deformations ◽  
Set Up ◽  
The Impact ◽  
Good Agreement

Abstract Normal impact of a massive body on a uniformly stretched plate lying on the base is investigated. A hinged round or rectangular plate on an elastic base, or an infinite plate on the surface of an ideal incompressible fluid is considered. The solution to the elastoplastic impact is in good agreement with numerical calculations and experimental data. With a small parameter of elastic collapse, that is, with the developed local plastic deformations, a solution to the problem of impact with rigid-plastic local collapse can be used. Approximate formulas for calculating the main characteristics of rigid-plastic impact are set up.

scholarly journals PROGRAMA COMPUTACIONAL PARA SIMULAÇÃO DA IRRIGAÇÃO POR SUPERFÍCIE

Irriga ◽  
1999 ◽  
Vol 4 (3) ◽  
pp. 124-131
Author(s):  
Marcio Antonio Vilas Boas
Keyword(s):  
Computer Simulation ◽  
Computer Program ◽  
Mathematical Models ◽  
Field Data ◽  
Model Performance ◽  
Visual Basic ◽  
Surface Flow ◽  
Surface Irrigation ◽  
Design Alternatives ◽  
Good Agreement

PROGRAMA COMPUTACIONAL PARA SIMULAÇÃO DA IRRIGAÇÃO POR SUPERFÍCIE   Márcio Antônio Vilas BoasUNIOESTE - Universidade Estadual do Oeste do ParanáDepartamento Engenharia - Cx. Postal 711Fone: (045) 225 -2100  (R-249) - Fax : (045) 223-4584CEP: 85814-110 - Cascavel - PR - Brasil   1 RESUMO   Os modelos matemáticos propostos para simular o processo de irrigação  por superfície constituem recursos valiosos, capazes de incluir inúmeras alternativas de dimensionamento, a um custo e tempo reduzidos. O objetivo do presente trabalho resumiu-se no desenvolvimento de um programa computacional para simular todas as fases do processo de irrigação por superfície, utilizando a aproximação Zero-inércia das equações de Saint-Venant. A linguagem de programação utilizada foi Visual Basic, em ambiente Windows 95. Para proceder à avaliação do modelo utilizou-se dados de irrigação em sulco e faixa obtidos em campos experimentais de precisão. Os resultados mostraram-se plenamente satisfatórios para a simulação de todas as fases da irrigação. O programa computacional desenvolvido pode ser útil também como instrumento didático.   UNITERMOS: irrigação, irrigação por sulcos, simulação computacional.   VILAS BOAS, M. A .  Software for simulation of the surface irrigation   2 ABSTRACT   The use of mathematical models to predict surface irrigation process may be a valuable tool wich allows several design alternatives, at reduced cost and time. The aim of this work is to develop a software to simulate all phases of surface  irrigation, under the  Zero-inertia approach, using a complete equations to describe surface flow.  The computer program was developed in Visual Basic in Windows  95 environment. The model performance was evaluated  by  comparison with a precision furrow and border irrigation data. The results of both approaches were in  good agreement with field data. The program may be also a useful tool  for teaching.   KEYWORDS: irrigation, surface irrigation furrow, computer simulation.

scholarly journals Quantifying the Impact of Evapotranspiration at the Aquifer Scale via Groundwater Modelling and MODIS Data

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 950
Author(s):  
Nicolò Colombani ◽  
Mattia Gaiolini ◽  
Gianluigi Busico ◽  
Matteo Postacchini
Keyword(s):  
Model Performance ◽  
Shallow Groundwater ◽  
Alluvial Aquifer ◽  
Statistical Parameters ◽  
Monitoring Wells ◽  
Moderate Resolution ◽  
Resolution Imaging ◽  
Moderate Resolution Imaging Spectroradiometer ◽  
Set Up ◽  
The Impact

In shallow alluvial aquifers characterized by coarse sediments, the evapotranspiration rates from groundwater are often not accounted for due to their low capillarity. Nevertheless, this assumption can lead to errors in the hydrogeological balance estimation. To quantify such impacts, a numerical flow model using MODFLOW was set up for the Tronto river alluvial aquifer (Italy). Different estimates of evapotranspiration rates were retrieved from the online Moderate Resolution Imaging Spectroradiometer (MODIS) database and used as input values. The numerical model was calibrated against piezometric heads collected in two snapshots (mid-January 2007 and mid-June 2007) in monitoring wells distributed along the whole alluvial aquifer. The model performance was excellent, with all the statistical parameters indicating very good agreement between calculated and observed heads. The model validation was performed using baseflow data of the Tronto river compared with the calculated aquifer–river exchanges in both of the simulated periods. Then, a series of numerical scenarios indicated that, although the model performance did not vary appreciably regardless of whether it included evapotranspiration from groundwater, the aquifer–river exchanges were influenced significantly. This study showed that evapotranspiration from shallow groundwater accounts for up to 21% of the hydrogeological balance at the aquifer scale and that baseflow observations are pivotal in quantifying the evapotranspiration impact.

scholarly journals Enhancing Interdisciplinary Mathematics and Biology Education: A Microarray Data Analysis Course Bridging These Disciplines

2010 ◽  
Vol 9 (3) ◽  
pp. 217-226 ◽  
Author(s):  
Yolande V. Tra ◽  
Irene M. Evans
Keyword(s):  
Data Analysis ◽  
Microarray Data ◽  
Biology Education ◽  
Microarray Experiment ◽  
Educational Background ◽  
Microarray Data Analysis ◽  
Data Set ◽  
Set Up ◽  
Interdisciplinary Course ◽  
The Impact

BIO2010 put forth the goal of improving the mathematical educational background of biology students. The analysis and interpretation of microarray high-dimensional data can be very challenging and is best done by a statistician and a biologist working and teaching in a collaborative manner. We set up such a collaboration and designed a course on microarray data analysis. We started using Genome Consortium for Active Teaching (GCAT) materials and Microarray Genome and Clustering Tool software and added R statistical software along with Bioconductor packages. In response to student feedback, one microarray data set was fully analyzed in class, starting from preprocessing to gene discovery to pathway analysis using the latter software. A class project was to conduct a similar analysis where students analyzed their own data or data from a published journal paper. This exercise showed the impact that filtering, preprocessing, and different normalization methods had on gene inclusion in the final data set. We conclude that this course achieved its goals to equip students with skills to analyze data from a microarray experiment. We offer our insight about collaborative teaching as well as how other faculty might design and implement a similar interdisciplinary course.

Analysis of Structural Parameters of Flexible Spiral Conveyor Blades and Study of its Transmission Power

2012 ◽  
Vol 200 ◽  
pp. 455-458
Author(s):  
Ye Tian ◽  
Zhi Hui Sun ◽  
Li Zhang
Keyword(s):  
Structural Parameters ◽  
Parameter Design ◽  
Transmission Power ◽  
Structure Parameter ◽  
Resistance Torque ◽  
Spiral Blade ◽  
Set Up ◽  
The Impact ◽  
The Mathematical Model ◽  
Good Agreement

A way of using flexible spiral blade as the executive part for spiral transportion was proposed, the mathematical model of its transportation resistance torque was set up, and the impact of structure parameter of flexible spiral blades on transportation power was analyzed. A experiment set-up was rigged, and tests were made to verify the theoretical model. The results of the experiment are in good agreement with the theoretical analysis. The research has enlightened the the parameter design of flexible spiral blades

INDONESIA LANGUAGE INTERFERENCE FORM IN BASIC PPL LEARNING THAILAND UNHASY COLLEGE SYUDENTS

2020 ◽  
Vol 8 (2) ◽  
pp. 38
Author(s):  
Siti Mariana Ulfa
Keyword(s):  
Qualitative Research ◽  
Data Analysis ◽  
Data Collection ◽  
Teaching Practice ◽  
Data Presentation ◽  
Analysis Techniques ◽  
Thai Students ◽  
The Impact ◽  
Collection Methods ◽  
Recording Techniques

AbstractHumans on earth need social interaction with others. Humans can use more than one language in communication. Thus, the impact that arises when the use of one or more languages is the contact between languages. One obvious form of contact between languages is interference. Interference can occur at all levels of life. As in this study, namely Indonesian Language Interference in Learning PPL Basic Thailand Unhasy Students. This study contains the form of interference that occurs in Thai students who are conducting teaching practices in the classroom. This type of research is descriptive qualitative research that seeks to describe any interference that occurs in the speech of Thai students when teaching practice. Data collection methods in this study are (1) observation techniques, (2) audio-visual recording techniques using CCTV and (3) recording techniques, by recording all data that has been obtained. Whereas the data wetness uses, (1) data triangulation, (2) improvement in perseverance and (3) peer review through discussion. Data analysis techniques in this study are (1) data collection, (2) data reduction, (3) data presentation and (4) conclusions. It can be seen that the interference that occurs includes (1) interference in phonological systems, (2) interference in morphological systems and (3) interference in syntactic systems. 

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