Dr Omer Yetemen

Dr Omer Yetemen

Lecturer

School of Engineering

Career Summary

Biography

Omer joined the Discipline of Civil Engineering in Jan 2016. He received his PhD in Civil Engineering from the University of Washington, Seattle, USA. Then, he worked as a Postdoctoral Fellow at the Global Institute for Water Security at the University of Saskatchewan, Canada.  His interests are ecohydrology, geomorphology, land-surface modelling and vegetation dynamics. The overarching goal of his research is trying to improve our current understanding about the role of climate on land-surface processes through vegetation dynamics. 


Qualifications

  • Doctor of Philosophy, University of Washington
  • Bachelor of Geological Engineering, Istanbul Technical University, Turkey
  • Master of Science, Istanbul Technical University, Turkey

Keywords

  • ecohydrology
  • geomorphology
  • landscape evolution modeling
  • vegetation dynamics

Professional Experience

UON Appointment

Title Organisation / Department
Lecturer University of Newcastle
School of Engineering
Australia

Academic appointment

Dates Title Organisation / Department
25/08/2014 - 15/01/2016 Postdoctoral Fellow University of Saskatchewan
Global Institute for Water Security
Canada
15/10/2009 - 15/06/2014 Graduate Research Assistant University of Washington
Department of Civil and Environmental Engineering
United States
14/08/2006 - 30/09/2009 Graduate Research Assistant University of Nebraska
Earth and Atmospheric Sciences
United States

Teaching

Code Course Role Duration
CIVL4330 Hydrology
Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
Instructor 22/02/2016 - 3/06/2016
CIVL4330 Hydrology
Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
Instructor 27/02/2017 - 2/06/2017
CIVL4601 Environmental Engineering Project 2
Faculty of Engineering and Built Environment - The University of Newcastle (Australia)
Instructor 25/07/2016 - 25/11/2016
Edit

Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (6 outputs)

Year Citation Altmetrics Link
2015 Yetemen O, Istanbulluoglu E, Flores-Cervantes JH, Vivoni ER, Bras RL, 'Ecohydrologic role of solar radiation on landscape evolution', WATER RESOURCES RESEARCH, 51 1127-1157 (2015) [C1]
DOI 10.1002/2014WR016169
Citations Scopus - 12Web of Science - 12
2015 Yetemen O, Istanbulluoglu E, Duvall AR, 'Solar radiation as a global driver of hillslope asymmetry: Insights from an ecogeomorphic landscape evolution model', WATER RESOURCES RESEARCH, 51 9843-9861 (2015) [C1]
DOI 10.1002/2015WR017103
Citations Scopus - 5Web of Science - 4
2010 Yetemen O, Istanbulluoglu E, Vivoni ER, 'The implications of geology, soils, and vegetation on landscape morphology: Inferences from semi-arid basins with complex vegetation patterns in Central New Mexico, USA', Geomorphology, 116 246-263 (2010)

This paper examines the relationship between land surface properties (e.g. soil, vegetation, and lithology) and landscape morphology quantified by the catchment descriptors: the s... [more]

This paper examines the relationship between land surface properties (e.g. soil, vegetation, and lithology) and landscape morphology quantified by the catchment descriptors: the slope-area (S-A) relation, curvature-area (C-A) relation, and the cumulative area distribution (CAD), in two semi-arid basins in central New Mexico. The first site is composed of several basins located in today's desert elevations with mesic north-facing and xeric south-facing hillslopes underlain by different lithological formations. The second site is a mountainous basin exhibiting vegetation gradients from shrublands in the lower elevations to grasslands and forests at higher elevations. All three land surface properties were found to have significant influences on the S-A and C- A relations, while the power-law exponents of the CADs for these properties did not show any significant deviations from the narrow range of universal scaling exponents reported in the literature. Among the three different surface properties we investigated, vegetation had the most profound impact on the catchment descriptors. In the S-A diagrams of the aspect-controlled ecosystems, we found steeper slopes in north-facing aspects than south-facing aspects for a given drainage area. In elevation-controlled ecosystems, forested landscapes exhibited the steepest slopes for the range of drainage areas examined, followed by shrublands and grasslands in all soil textures and lithologies. In the C-A diagrams, steeper slopes led to a higher degree of divergence on hillslopes and a higher degree of convergence in the valleys than shallower slopes. The influence of functional types of vegetation detected on observed topography provided some initial understanding of the potential impacts of life on the organization of topography. This finding also emphasizes the critical role of climate in catchment development. We suggest that climatic fluctuations that are capable of replacing vegetation communities could lead to highly amplified hydrological and geomorphic responses.

DOI 10.1016/j.geomorph.2009.11.026
Citations Scopus - 32Web of Science - 34
2009 Yetemen O, Yalcin T, 'Climatic parameters and evaluation of energy consumption of the Afyon geothermal district heating system, Afyon, Turkey', Renewable Energy, 34 706-710 (2009)

Afyon geothermal district heating system (AFJET) provides heating to 4519 residences, covering an area of 513,683 m 2 . Due to limitations in reinjection capacity, geothermal wate... [more]

Afyon geothermal district heating system (AFJET) provides heating to 4519 residences, covering an area of 513,683 m 2 . Due to limitations in reinjection capacity, geothermal waters are released to the Akarcay Stream, detrimentally affecting the environment. Optimum heating load of the system was determined for a given ambient conditions with respect to different outdoor temperatures. Usage of AFJET was found to be higher than the optimum consumption rates. Optimizing the usage of geothermal water will decrease operational cost, increase equipment life-span, and reduce environmental pollution.

DOI 10.1016/j.renene.2008.04.020
Citations Scopus - 8Web of Science - 5
2009 Yalcin T, Yetemen O, 'Local warming of groundwaters caused by the urban heat island effect in Istanbul, Turkey', Hydrogeology Journal, 17 1247-1255 (2009)

The urban heat island (UHI) is a result of urbanization, causing local microclimatologic changes such as increase in ambient temperature. Factors causing the UHI effect are anthro... [more]

The urban heat island (UHI) is a result of urbanization, causing local microclimatologic changes such as increase in ambient temperature. Factors causing the UHI effect are anthropogenic energy release, energy absorption by concrete, tarmac structures and traffic, although the main factor is the replacement of vegetation with man-made structures. These factors cause heating of not only local air but also subsurface and groundwater. Observations of groundwater temperatures from the urban, southern part of Istanbul (Turkey) and the rural, northern part of Istanbul revealed that the urban groundwater temperatures were 3.5°C higher than the rural. Urbanization is a direct consequence of improvements in technology and modern life. However, this comes at the cost of an ever-increasing demand for energy. Exploitation of low-enthalpy geothermal energy is an attractive alternative to fossil fuel based energies. From the environmental point of view, clean and cheap energy is the most preferable, with heat pumps being the best choice for recovery purposes. Usage of elevated groundwater temperature in the heat pumps in urban areas increases the efficiency of the heat pump system and yields more thermal energy than that of rural groundwater. This system may be applicable to Istanbul. © Springer-Verlag 2009.

DOI 10.1007/s10040-009-0474-7
Citations Scopus - 12Web of Science - 12
2008 Istanbulluoglu E, Yetemen O, Vivoni ER, Gutiérrez-Jurado HA, Bras RL, 'Eco-geomorphic implications of hillslope aspect: Inferences from analysis of landscape morphology in central New Mexico', Geophysical Research Letters, 35 (2008)

We investigate the influence of hillslope aspect on landscape morphology in central New Mexico, where differences in soils, vegetation, and landforms are observed between mesic no... [more]

We investigate the influence of hillslope aspect on landscape morphology in central New Mexico, where differences in soils, vegetation, and landforms are observed between mesic north-facing and xeric south-facing slopes. Slope-area and curvature-area relations, derived from a Digital Elevation Model (DEM), are used to characterize the opposing hillslope morphologies. In all geologies and elevation ranges studied, topographic data reveal significantly steeper slopes in north-facing aspects, and shallower slopes in south-facing aspects. North-facing slope curvatures are also greater than south-facing curvatures. Using a conceptual slope-area model, we suggest that for a given drainage area, steeper north-facing slopes imply lower soil erodibility. We argue that this interpretation, consistent with recent views of ecosystem control on semiarid erosion rates, shows the influence hillslope aspect on topography and its associated vegetation communities. Observed valley asymmetry in the region reinforces this concept and suggests a long-term legacy of aspect-modulated ecogeomorphic proceses. Copyright 2008 by the American Geophysical Union.

DOI 10.1029/2008GL034477
Citations Scopus - 40Web of Science - 39
Show 3 more journal articles
Edit

Research Supervision

Number of supervisions

Completed0
Current3

Total current UON EFTSL

PhD1.5

Current Supervision

Commenced Level of Study Research Title Program Supervisor Type
2017 PhD A Global Eco-Hydro-Geomorphic Analysis PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle Principal Supervisor
2016 PhD COUPLING A BIOCHEMICAL VEGETATION DYNAMIC MODEL WITH LANDSCAPE EVOLUTION FOR CLIMATE CHANGE IMPACTS ASSESSMENT PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle Co-Supervisor
2016 PhD Climate - Soil - Vegetation Interactions: Eco-hydro-geomorphic Inferences from Landscape Evolution Models PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle Co-Supervisor
Edit

Research Collaborations

The map is a representation of a researchers co-authorship with collaborators across the globe. The map displays the number of publications against a country, where there is at least one co-author based in that country. Data is sourced from the University of Newcastle research publication management system (NURO) and may not fully represent the authors complete body of work.

Country Count of Publications
United States 6
Canada 2
Turkey 2
Edit

Dr Omer Yetemen

Position

Lecturer
Civil Engineering
School of Engineering
Faculty of Engineering and Built Environment

Contact Details

Email omer.yetemen@newcastle.edu.au
Phone 4921 5452
Fax 4921 6991

Office

Room EA125
Building Engineering A
Location Callaghan Campus
University Drive
Callaghan, NSW 2308
Australia
Edit